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<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_tac_ExchangeableSecuritiesAbstract_label_en-US" xlink:label="lab_tac_ExchangeableSecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchangeable Securities [Abstract]</link:label>
    <link:label id="lab_tac_ExchangeableSecuritiesAbstract_documentation_en-US" xlink:label="lab_tac_ExchangeableSecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchangeable Securities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ExchangeableSecuritiesAbstract" xlink:href="tac-20191231.xsd#tac_ExchangeableSecuritiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ExchangeableSecuritiesAbstract" xlink:to="lab_tac_ExchangeableSecuritiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent_e4d7111f-cdc3-4e70-b4f6-40e37656e780_terseLabel_en-US" xlink:label="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">South Hedland prepaid transmission access and distribution costs</link:label>
    <link:label id="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent_label_en-US" xlink:label="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid Transmission Access And Distribution, Non-Current</link:label>
    <link:label id="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent_documentation_en-US" xlink:label="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid Transmission Access And Distribution, Non-Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:href="tac-20191231.xsd#tac_PrepaidTransmissionAccessAndDistributionNonCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:to="lab_tac_PrepaidTransmissionAccessAndDistributionNonCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CashReservesonNonRecourseBonds_8ec40321-e78f-4504-9301-f3ffc0357dd3_terseLabel_en-US" xlink:label="lab_tac_CashReservesonNonRecourseBonds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash on deposit, non-recourse bonds</link:label>
    <link:label id="lab_tac_CashReservesonNonRecourseBonds_label_en-US" xlink:label="lab_tac_CashReservesonNonRecourseBonds" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Reserves on Non-Recourse Bonds</link:label>
    <link:label id="lab_tac_CashReservesonNonRecourseBonds_documentation_en-US" xlink:label="lab_tac_CashReservesonNonRecourseBonds" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Reserves on Non-Recourse Bonds</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CashReservesonNonRecourseBonds" xlink:href="tac-20191231.xsd#tac_CashReservesonNonRecourseBonds"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CashReservesonNonRecourseBonds" xlink:to="lab_tac_CashReservesonNonRecourseBonds" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements_0c66bd05-cec0-4e5f-aa6f-8a4baffba9a0_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross financial liabilities set off against financial assets subject to offsetting, enforceable master netting arrangements or similar agreements</link:label>
    <link:label id="lab_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements_label_en-US" xlink:label="lab_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross financial liabilities set off against financial assets subject to offsetting, enforceable master netting arrangements or similar agreements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:to="lab_ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TermOfPowerPurchaseArrangements_b8dfa1ac-5b5b-4cb3-a708-011c807f5ad9_terseLabel_en-US" xlink:label="lab_tac_TermOfPowerPurchaseArrangements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term of power purchase arrangement</link:label>
    <link:label id="lab_tac_TermOfPowerPurchaseArrangements_label_en-US" xlink:label="lab_tac_TermOfPowerPurchaseArrangements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Of Power Purchase Arrangements</link:label>
    <link:label id="lab_tac_TermOfPowerPurchaseArrangements_documentation_en-US" xlink:label="lab_tac_TermOfPowerPurchaseArrangements" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Of Power Purchase Arrangements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TermOfPowerPurchaseArrangements" xlink:href="tac-20191231.xsd#tac_TermOfPowerPurchaseArrangements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TermOfPowerPurchaseArrangements" xlink:to="lab_tac_TermOfPowerPurchaseArrangements" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureOfLeasesAbstract_label_en-US" xlink:label="lab_tac_DisclosureOfLeasesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of leases [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureOfLeasesAbstract_documentation_en-US" xlink:label="lab_tac_DisclosureOfLeasesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of leases [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureOfLeasesAbstract" xlink:href="tac-20191231.xsd#tac_DisclosureOfLeasesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureOfLeasesAbstract" xlink:to="lab_tac_DisclosureOfLeasesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_8a1ae96c-e261-4710-a7e5-71e3397a5740_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total items that will be reclassified subsequently to net earnings</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_4237b833-5e6c-450b-bd2e-808f51638539_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income that will be reclassified to profit or loss, net of tax</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income that will be reclassified to profit or loss, net of tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:to="lab_ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock_6c1744cc-ba71-4500-b75f-3bfb1458c333_terseLabel_en-US" xlink:label="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of non-cash operating working capital</link:label>
    <link:label id="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of non-cash operating working capital [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of non-cash operating working capital [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:to="lab_tac_DisclosureofnoncashoperatingworkingcapitalTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ProvisionsDisposed_3893d8bc-7610-4e95-89df-84f6d9342879_negatedTerseLabel_en-US" xlink:label="lab_tac_ProvisionsDisposed" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities disposed</link:label>
    <link:label id="lab_tac_ProvisionsDisposed_label_en-US" xlink:label="lab_tac_ProvisionsDisposed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions, Disposed</link:label>
    <link:label id="lab_tac_ProvisionsDisposed_documentation_en-US" xlink:label="lab_tac_ProvisionsDisposed" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions, Disposed</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ProvisionsDisposed" xlink:href="tac-20191231.xsd#tac_ProvisionsDisposed"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ProvisionsDisposed" xlink:to="lab_tac_ProvisionsDisposed" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CHDMember_bd059c81-b8cb-4ade-97db-986db02129dd_terseLabel_en-US" xlink:label="lab_tac_CHDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CHD</link:label>
    <link:label id="lab_tac_CHDMember_label_en-US" xlink:label="lab_tac_CHDMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CHD [Member]</link:label>
    <link:label id="lab_tac_CHDMember_documentation_en-US" xlink:label="lab_tac_CHDMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CHD [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CHDMember" xlink:href="tac-20191231.xsd#tac_CHDMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CHDMember" xlink:to="lab_tac_CHDMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfMortalityRatesMember_fde70dfb-97f0-40d8-8efe-cbd4a206d03b_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfMortalityRatesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">10% improvement in mortality rates</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfMortalityRatesMember_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfMortalityRatesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumption of mortality rates [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfMortalityRatesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ActuarialAssumptionOfMortalityRatesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ActuarialAssumptionOfMortalityRatesMember" xlink:to="lab_ifrs-full_ActuarialAssumptionOfMortalityRatesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LineofCreditCurrent1_6273868b-0545-48f8-8b91-dde659d11566_terseLabel_en-US" xlink:label="lab_tac_LineofCreditCurrent1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actual drawings on borrowings</link:label>
    <link:label id="lab_tac_LineofCreditCurrent1_label_en-US" xlink:label="lab_tac_LineofCreditCurrent1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit, Current1</link:label>
    <link:label id="lab_tac_LineofCreditCurrent1_documentation_en-US" xlink:label="lab_tac_LineofCreditCurrent1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit, Current1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LineofCreditCurrent1" xlink:href="tac-20191231.xsd#tac_LineofCreditCurrent1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LineofCreditCurrent1" xlink:to="lab_tac_LineofCreditCurrent1" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm_1b730d27-9fe7-4349-83b8-814fd6c3bc2e_terseLabel_en-US" xlink:label="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment period</link:label>
    <link:label id="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm_label_en-US" xlink:label="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Interest Fee Loan, Term</link:label>
    <link:label id="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm_documentation_en-US" xlink:label="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Interest Fee Loan, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:href="tac-20191231.xsd#tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:to="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFeeLoanTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GasEquipmentMember_4a881a71-e249-48bd-b158-4d408a93e89e_terseLabel_en-US" xlink:label="lab_tac_GasEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gas equipment</link:label>
    <link:label id="lab_tac_GasEquipmentMember_label_en-US" xlink:label="lab_tac_GasEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gas Equipment [Member]</link:label>
    <link:label id="lab_tac_GasEquipmentMember_documentation_en-US" xlink:label="lab_tac_GasEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gas Equipment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GasEquipmentMember" xlink:href="tac-20191231.xsd#tac_GasEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GasEquipmentMember" xlink:to="lab_tac_GasEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RenewableGenerationMember_30aed1b8-b022-4162-a8cd-9e2de5c57e05_terseLabel_en-US" xlink:label="lab_tac_RenewableGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable generation</link:label>
    <link:label id="lab_tac_RenewableGenerationMember_label_en-US" xlink:label="lab_tac_RenewableGenerationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable Generation [Member]</link:label>
    <link:label id="lab_tac_RenewableGenerationMember_documentation_en-US" xlink:label="lab_tac_RenewableGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable Generation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RenewableGenerationMember" xlink:href="tac-20191231.xsd#tac_RenewableGenerationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RenewableGenerationMember" xlink:to="lab_tac_RenewableGenerationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_19b29775-6239-4c7b-af41-c4b8c7cd27c4_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities arising from financing activities [axis]</link:label>
    <link:label id="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_label_en-US" xlink:label="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities arising from financing activities [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:to="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InvestmentPropertyMember_a01d4ab3-fd07-4bc3-9cdb-50512ff92506_terseLabel_en-US" xlink:label="lab_ifrs-full_InvestmentPropertyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment property [member]</link:label>
    <link:label id="lab_ifrs-full_InvestmentPropertyMember_label_en-US" xlink:label="lab_ifrs-full_InvestmentPropertyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment property [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InvestmentPropertyMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InvestmentPropertyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InvestmentPropertyMember" xlink:to="lab_ifrs-full_InvestmentPropertyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_WindGenerationMember_7fd41f96-7a11-47e6-85b7-c98e5ec6e2bf_terseLabel_en-US" xlink:label="lab_tac_WindGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind Generation</link:label>
    <link:label id="lab_tac_WindGenerationMember_label_en-US" xlink:label="lab_tac_WindGenerationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind Generation [Member]</link:label>
    <link:label id="lab_tac_WindGenerationMember_documentation_en-US" xlink:label="lab_tac_WindGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind Generation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_WindGenerationMember" xlink:href="tac-20191231.xsd#tac_WindGenerationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_WindGenerationMember" xlink:to="lab_tac_WindGenerationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger_3f732d6c-caba-44b1-b30a-d065aeb8cebe_terseLabel_en-US" xlink:label="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares Required To Cause Conversion of Securities, Trigger</link:label>
    <link:label id="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger_label_en-US" xlink:label="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares Required To Cause Conversion of Securities, Trigger</link:label>
    <link:label id="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger_documentation_en-US" xlink:label="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares Required To Cause Conversion of Securities, Trigger</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:href="tac-20191231.xsd#tac_SharesRequiredToCauseConversionofSecuritiesTrigger"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:to="lab_tac_SharesRequiredToCauseConversionofSecuritiesTrigger" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_fc5b82ed-2cb2-4b97-bb4b-cb1a263d3271_totalLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_9f931dda-3ed5-45cf-be00-4076467660a2_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncome" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ComprehensiveIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncome" xlink:to="lab_ifrs-full_ComprehensiveIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable_55b16672-da98-40c8-9773-fffe17f1bd56_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:to="lab_ifrs-full_DisclosureOfDefinedBenefitPlansTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FinanceLeaseObligationMember_0f60d0ce-eb39-4036-bb85-923effec3cc0_terseLabel_en-US" xlink:label="lab_tac_FinanceLeaseObligationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease obligation</link:label>
    <link:label id="lab_tac_FinanceLeaseObligationMember_label_en-US" xlink:label="lab_tac_FinanceLeaseObligationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease Obligation [Member]</link:label>
    <link:label id="lab_tac_FinanceLeaseObligationMember_documentation_en-US" xlink:label="lab_tac_FinanceLeaseObligationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease Obligation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FinanceLeaseObligationMember" xlink:href="tac-20191231.xsd#tac_FinanceLeaseObligationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FinanceLeaseObligationMember" xlink:to="lab_tac_FinanceLeaseObligationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_c31e162d-e0d4-49da-98b5-4f4e85b6f556_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_ifrs-full_DepreciationPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_b520c896-7a83-421d-974d-c758b2d7106d_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow from operating activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_40abb0c8-0831-472c-903a-4a9ebb152444_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) operating activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GeneseeUnit3Member_6daf4cea-d23f-458c-95f7-ca0ce54ef443_terseLabel_en-US" xlink:label="lab_tac_GeneseeUnit3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Genesee Unit 3</link:label>
    <link:label id="lab_tac_GeneseeUnit3Member_label_en-US" xlink:label="lab_tac_GeneseeUnit3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Genesee Unit 3 [Member]</link:label>
    <link:label id="lab_tac_GeneseeUnit3Member_documentation_en-US" xlink:label="lab_tac_GeneseeUnit3Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Genesee Unit 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GeneseeUnit3Member" xlink:href="tac-20191231.xsd#tac_GeneseeUnit3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GeneseeUnit3Member" xlink:to="lab_tac_GeneseeUnit3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset_6a04e385-24f6-4b47-99eb-ce0fb472e183_terseLabel_en-US" xlink:label="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Administration expenses</link:label>
    <link:label id="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset_f142e221-1557-4272-9013-a820e49b35e9_negatedTerseLabel_en-US" xlink:label="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Administration expenses</link:label>
    <link:label id="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Administrative Expenses, Net Defined Benefit Liability (Asset)</link:label>
    <link:label id="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset_documentation_en-US" xlink:label="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Administrative Expenses, Net Defined Benefit Liability (Asset)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:href="tac-20191231.xsd#tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:to="lab_tac_AdministrativeExpensesNetDefinedBenefitLiabilityAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeForwardPrice1_9aa1e3ab-fd4c-4a8b-9367-ffb255a1bfd4_terseLabel_en-US" xlink:label="lab_tac_DerivativeForwardPrice1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forward power price ranges per MWh</link:label>
    <link:label id="lab_tac_DerivativeForwardPrice1_label_en-US" xlink:label="lab_tac_DerivativeForwardPrice1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Forward Price1</link:label>
    <link:label id="lab_tac_DerivativeForwardPrice1_documentation_en-US" xlink:label="lab_tac_DerivativeForwardPrice1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Forward Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeForwardPrice1" xlink:href="tac-20191231.xsd#tac_DerivativeForwardPrice1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeForwardPrice1" xlink:to="lab_tac_DerivativeForwardPrice1" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeFromSubleasingRightofuseAssets_172ed6a0-b7ff-49e6-b195-fdcdd1736ffa_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeFromSubleasingRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sublease payments received (amounts less than)</link:label>
    <link:label id="lab_ifrs-full_IncomeFromSubleasingRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_IncomeFromSubleasingRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income from subleasing right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeFromSubleasingRightofuseAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncomeFromSubleasingRightofuseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeFromSubleasingRightofuseAssets" xlink:to="lab_ifrs-full_IncomeFromSubleasingRightofuseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RiskManagementAssetsMember_16fca86d-ea29-4e9d-9385-706ea4095a6b_terseLabel_en-US" xlink:label="lab_tac_RiskManagementAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management assets</link:label>
    <link:label id="lab_tac_RiskManagementAssetsMember_label_en-US" xlink:label="lab_tac_RiskManagementAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk Management Assets [Member]</link:label>
    <link:label id="lab_tac_RiskManagementAssetsMember_documentation_en-US" xlink:label="lab_tac_RiskManagementAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk Management Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RiskManagementAssetsMember" xlink:href="tac-20191231.xsd#tac_RiskManagementAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RiskManagementAssetsMember" xlink:to="lab_tac_RiskManagementAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_2f1b72a3-161c-4701-b814-065ff9274b3f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information about key management personnel</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of transactions between related parties [text block]</link:label>
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    <link:label id="lab_ifrs-full_InitiallyAppliedIFRSsAxis_c7c040b3-09dd-400c-9a96-032a21111dc1_terseLabel_en-US" xlink:label="lab_ifrs-full_InitiallyAppliedIFRSsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Initially applied IFRSs [axis]</link:label>
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    <link:label id="lab_tac_DisclosureofinvestmentgradecreditratingTableTextBlock_ff34fdc4-4496-48b9-b3d9-2514af9f767a_terseLabel_en-US" xlink:label="lab_tac_DisclosureofinvestmentgradecreditratingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of investment grade credit rating</link:label>
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    <link:label id="lab_tac_Adjustmentsforincreasedecreaseinaccountspayableandothercurrentliabilities_7298e8b2-353f-455d-a89e-5b1e3d7a4049_terseLabel_en-US" xlink:label="lab_tac_Adjustmentsforincreasedecreaseinaccountspayableandothercurrentliabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable, accrued liabilities and provisions</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DefinedBenefitPlanMaximumAgeDisabledandRetiredMemberEligibleForBenefits" xlink:to="lab_tac_DefinedBenefitPlanMaximumAgeDisabledandRetiredMemberEligibleForBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk_73fdf4fe-5ca1-4ba7-b6ba-eee63daf2649_terseLabel_en-US" xlink:label="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency Rate Risk</link:label>
    <link:label id="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk_label_en-US" xlink:label="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis for types of market risk [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:to="lab_ifrs-full_SensitivityAnalysisForEachTypeOfMarketRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember_da90fbb0-ae0b-4d62-b719-0a5d64a35c59_terseLabel_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember_label_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant And Equipment Related Temporary Differences [Member]</link:label>
    <link:label id="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember_documentation_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant And Equipment Related Temporary Differences [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:href="tac-20191231.xsd#tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:to="lab_tac_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_WinteringHillsMember_48de082c-eaaa-4568-a3d1-cadc851e8e41_terseLabel_en-US" xlink:label="lab_tac_WinteringHillsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wintering Hills</link:label>
    <link:label id="lab_tac_WinteringHillsMember_label_en-US" xlink:label="lab_tac_WinteringHillsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wintering Hills [Member]</link:label>
    <link:label id="lab_tac_WinteringHillsMember_documentation_en-US" xlink:label="lab_tac_WinteringHillsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wintering Hills [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_WinteringHillsMember" xlink:href="tac-20191231.xsd#tac_WinteringHillsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_WinteringHillsMember" xlink:to="lab_tac_WinteringHillsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfHedgesAxis_b4ecf106-2aa9-47a8-b4cb-2b034b7e3b19_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfHedgesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of hedges [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfHedgesAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfHedgesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of hedges [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfHedgesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfHedgesAxis" xlink:to="lab_ifrs-full_TypesOfHedgesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfCreditRiskExposureTable_c6bf7d32-85a4-44bc-87ba-b2e721b4f489_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of credit risk exposure [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfCreditRiskExposureTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of credit risk exposure [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfCreditRiskExposureTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:to="lab_ifrs-full_DisclosureOfCreditRiskExposureTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HedgingDesignation1Axis_8da54392-7709-43cf-a54b-41f86706a340_terseLabel_en-US" xlink:label="lab_tac_HedgingDesignation1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:label id="lab_tac_HedgingDesignation1Axis_label_en-US" xlink:label="lab_tac_HedgingDesignation1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation1 [Axis]</link:label>
    <link:label id="lab_tac_HedgingDesignation1Axis_documentation_en-US" xlink:label="lab_tac_HedgingDesignation1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HedgingDesignation1Axis" xlink:href="tac-20191231.xsd#tac_HedgingDesignation1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HedgingDesignation1Axis" xlink:to="lab_tac_HedgingDesignation1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CanadianGasMember_df88b76b-d265-4723-a442-3d25e210a103_terseLabel_en-US" xlink:label="lab_tac_CanadianGasMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Gas</link:label>
    <link:label id="lab_tac_CanadianGasMember_label_en-US" xlink:label="lab_tac_CanadianGasMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Gas [Member]</link:label>
    <link:label id="lab_tac_CanadianGasMember_documentation_en-US" xlink:label="lab_tac_CanadianGasMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Gas [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CanadianGasMember" xlink:href="tac-20191231.xsd#tac_CanadianGasMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CanadianGasMember" xlink:to="lab_tac_CanadianGasMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_9f484e00-0d77-446c-97fb-0fe1844f76bc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of risk management strategy related to hedge accounting [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of risk management strategy related to hedge accounting [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems" xlink:to="lab_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan_44bc1bc5-d597-4afb-b569-0fe6b89febf8_terseLabel_en-US" xlink:label="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Capital, Amount Before Receivables Under Employee Share Purchase Plan</link:label>
    <link:label id="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan_label_en-US" xlink:label="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Capital, Amount Before Receivables Under Employee Share Purchase Plan</link:label>
    <link:label id="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan_documentation_en-US" xlink:label="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Capital, Amount Before Receivables Under Employee Share Purchase Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:href="tac-20191231.xsd#tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:to="lab_tac_IssuedCapitalAmountBeforeReceivablesUnderEmployeeSharePurchasePlan" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_3c566947-9a16-4925-865e-3c44bab10532_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) financing activities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GainsOnTerminationOfInvestments_dee302b4-a1f0-4981-929b-d9e345c69705_negatedLabel_en-US" xlink:label="lab_tac_GainsOnTerminationOfInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Termination of Sundance B and C PPAs</link:label>
    <link:label id="lab_tac_GainsOnTerminationOfInvestments_3b172781-1177-4c97-b505-38874befee9c_terseLabel_en-US" xlink:label="lab_tac_GainsOnTerminationOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on termination of investments</link:label>
    <link:label id="lab_tac_GainsOnTerminationOfInvestments_label_en-US" xlink:label="lab_tac_GainsOnTerminationOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on termination of investments</link:label>
    <link:label id="lab_tac_GainsOnTerminationOfInvestments_documentation_en-US" xlink:label="lab_tac_GainsOnTerminationOfInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on termination of investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GainsOnTerminationOfInvestments" xlink:href="tac-20191231.xsd#tac_GainsOnTerminationOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GainsOnTerminationOfInvestments" xlink:to="lab_tac_GainsOnTerminationOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FairValueHedgesMember_9a665286-b6ef-45c6-825e-3a1e757982c0_verboseLabel_en-US" xlink:label="lab_ifrs-full_FairValueHedgesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value hedges [member]</link:label>
    <link:label id="lab_ifrs-full_FairValueHedgesMember_d17e6a2c-b0f9-43f7-be6b-d8d4040bcd83_terseLabel_en-US" xlink:label="lab_ifrs-full_FairValueHedgesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value hedges</link:label>
    <link:label id="lab_ifrs-full_FairValueHedgesMember_label_en-US" xlink:label="lab_ifrs-full_FairValueHedgesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value hedges [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FairValueHedgesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FairValueHedgesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FairValueHedgesMember" xlink:to="lab_ifrs-full_FairValueHedgesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents_83f0ddca-85dc-49a3-87b1-6152053eeca2_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash (Note 22)</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) decrease (increase) in restricted cash and cash equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents" xlink:to="lab_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInRestrictedCashAndCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherRiskMember_2ec1425b-db5e-4770-a087-02952bb20ddd_terseLabel_en-US" xlink:label="lab_tac_OtherRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_tac_OtherRiskMember_label_en-US" xlink:label="lab_tac_OtherRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Risk [Member]</link:label>
    <link:label id="lab_tac_OtherRiskMember_documentation_en-US" xlink:label="lab_tac_OtherRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherRiskMember" xlink:href="tac-20191231.xsd#tac_OtherRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherRiskMember" xlink:to="lab_tac_OtherRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable_29ca9dcc-1363-43cf-995e-2db44a23a2e4_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting estimates [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting estimates [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfChangesInAccountingEstimatesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable" xlink:to="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsPurchasedMass_b499cdd7-e5fe-4ea7-ab70-3cbe6bccf15d_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsPurchasedMass" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount purchased</link:label>
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    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_afa11407-66ff-4f8d-bd74-0d94f54fb22d_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Attributable to shareholders</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [table]</link:label>
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    <link:label id="lab_tac_BenchmarkMember_3c6c5afb-0f18-4d0d-8258-543bbcbde3dd_terseLabel_en-US" xlink:label="lab_tac_BenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benchmark</link:label>
    <link:label id="lab_tac_BenchmarkMember_label_en-US" xlink:label="lab_tac_BenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benchmark [Member]</link:label>
    <link:label id="lab_tac_BenchmarkMember_documentation_en-US" xlink:label="lab_tac_BenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benchmark [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_BenchmarkMember" xlink:href="tac-20191231.xsd#tac_BenchmarkMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_BenchmarkMember" xlink:to="lab_tac_BenchmarkMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PingstonMember_dfbca3a0-f41c-4108-ada8-21582b544a03_terseLabel_en-US" xlink:label="lab_tac_PingstonMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pingston</link:label>
    <link:label id="lab_tac_PingstonMember_label_en-US" xlink:label="lab_tac_PingstonMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pingston [Member]</link:label>
    <link:label id="lab_tac_PingstonMember_documentation_en-US" xlink:label="lab_tac_PingstonMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pingston [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PingstonMember" xlink:href="tac-20191231.xsd#tac_PingstonMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PingstonMember" xlink:to="lab_tac_PingstonMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SpareParts_cfa95cfa-aad5-4951-a5a3-52521b8ccd95_terseLabel_en-US" xlink:label="lab_ifrs-full_SpareParts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current spare parts</link:label>
    <link:label id="lab_ifrs-full_SpareParts_label_en-US" xlink:label="lab_ifrs-full_SpareParts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current spare parts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SpareParts" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_SpareParts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SpareParts" xlink:to="lab_ifrs-full_SpareParts" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PortionDenominatedInForeignCurrencyDomain_919224a9-a0ac-4782-be8b-64088445cc09_terseLabel_en-US" xlink:label="lab_tac_PortionDenominatedInForeignCurrencyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion Denominated in Foreign Currency [Domain]</link:label>
    <link:label id="lab_tac_PortionDenominatedInForeignCurrencyDomain_label_en-US" xlink:label="lab_tac_PortionDenominatedInForeignCurrencyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion Denominated In Foreign Currency [Domain]</link:label>
    <link:label id="lab_tac_PortionDenominatedInForeignCurrencyDomain_documentation_en-US" xlink:label="lab_tac_PortionDenominatedInForeignCurrencyDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Portion Denominated In Foreign Currency [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PortionDenominatedInForeignCurrencyDomain" xlink:href="tac-20191231.xsd#tac_PortionDenominatedInForeignCurrencyDomain"/>
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    <link:label id="lab_ifrs-full_BottomOfRangeMember_241162d6-6e02-4365-8f0b-a6fa635c7271_terseLabel_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_ifrs-full_BottomOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bottom of range [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BottomOfRangeMember" xlink:to="lab_ifrs-full_BottomOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesMember_7369a849-f3b6-48bc-a155-bdc07e7aec64_terseLabel_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed bilateral credit facilities</link:label>
    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesMember_label_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Bilateral Credit Facilities [Member]</link:label>
    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesMember_documentation_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Bilateral Credit Facilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommittedBilateralCreditFacilitiesMember" xlink:href="tac-20191231.xsd#tac_CommittedBilateralCreditFacilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CommittedBilateralCreditFacilitiesMember" xlink:to="lab_tac_CommittedBilateralCreditFacilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Adjustmentsforincometaxreceivable_e8cc6099-94e7-4282-994c-db0059595ebc_verboseLabel_en-US" xlink:label="lab_tac_Adjustmentsforincometaxreceivable" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes receivable</link:label>
    <link:label id="lab_tac_Adjustmentsforincometaxreceivable_label_en-US" xlink:label="lab_tac_Adjustmentsforincometaxreceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for income tax receivable</link:label>
    <link:label id="lab_tac_Adjustmentsforincometaxreceivable_documentation_en-US" xlink:label="lab_tac_Adjustmentsforincometaxreceivable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for income tax receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Adjustmentsforincometaxreceivable" xlink:href="tac-20191231.xsd#tac_Adjustmentsforincometaxreceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Adjustmentsforincometaxreceivable" xlink:to="lab_tac_Adjustmentsforincometaxreceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CounterpartyNameAxis_237016d4-014d-474c-9b64-c7b9038ff3a7_terseLabel_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:label id="lab_srt_CounterpartyNameAxis_label_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CounterpartyNameAxis" xlink:to="lab_srt_CounterpartyNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_84d9007c-7b86-4e10-b458-cd642ce293a5_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of share options on number of ordinary shares</link:label>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_label_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of share options on number of ordinary shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:to="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FortescueMetalsGroupLimitedMember_7fd09f9e-b9b7-4ceb-ae78-6a55dbbe093b_terseLabel_en-US" xlink:label="lab_tac_FortescueMetalsGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue Metals Group Limited</link:label>
    <link:label id="lab_tac_FortescueMetalsGroupLimitedMember_label_en-US" xlink:label="lab_tac_FortescueMetalsGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue Metals Group Limited [Member]</link:label>
    <link:label id="lab_tac_FortescueMetalsGroupLimitedMember_documentation_en-US" xlink:label="lab_tac_FortescueMetalsGroupLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue Metals Group Limited [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FortescueMetalsGroupLimitedMember" xlink:href="tac-20191231.xsd#tac_FortescueMetalsGroupLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FortescueMetalsGroupLimitedMember" xlink:to="lab_tac_FortescueMetalsGroupLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CapitalCommitments_e8f59239-280d-4c37-95a2-8e6897b770f2_terseLabel_en-US" xlink:label="lab_ifrs-full_CapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital commitments</link:label>
    <link:label id="lab_ifrs-full_CapitalCommitments_label_en-US" xlink:label="lab_ifrs-full_CapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalCommitments" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CapitalCommitments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CapitalCommitments" xlink:to="lab_ifrs-full_CapitalCommitments" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GainsLossesonContractAgreement_a5ad6000-4d65-4323-a12d-b867c400202d_terseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractAgreement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta Off-Coal Agreement</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreement_a61a24a0-a6dc-4006-bd6c-52a6f571ef61_negatedTerseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractAgreement" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta Off-Coal Agreement</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreement_e5112ff6-85e7-4e10-b346-70cb8f7c5e4c_verboseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractAgreement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta off-coal agreement, annual cash payments, gross</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreement_label_en-US" xlink:label="lab_tac_GainsLossesonContractAgreement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Agreement</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreement_documentation_en-US" xlink:label="lab_tac_GainsLossesonContractAgreement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GainsLossesonContractAgreement" xlink:href="tac-20191231.xsd#tac_GainsLossesonContractAgreement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GainsLossesonContractAgreement" xlink:to="lab_tac_GainsLossesonContractAgreement" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill_6c25f63c-ed53-4567-b3b7-ee3a93783658_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirements and disposals(2)</link:label>
    <link:label id="lab_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirements, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_RetirementsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CurrentPurchasedEmissionCredit_ebfcd0c9-7165-4be8-895c-339e26ce291c_terseLabel_en-US" xlink:label="lab_tac_CurrentPurchasedEmissionCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchased emission credits</link:label>
    <link:label id="lab_tac_CurrentPurchasedEmissionCredit_label_en-US" xlink:label="lab_tac_CurrentPurchasedEmissionCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Purchased Emission Credit</link:label>
    <link:label id="lab_tac_CurrentPurchasedEmissionCredit_documentation_en-US" xlink:label="lab_tac_CurrentPurchasedEmissionCredit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Purchased Emission Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CurrentPurchasedEmissionCredit" xlink:href="tac-20191231.xsd#tac_CurrentPurchasedEmissionCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CurrentPurchasedEmissionCredit" xlink:to="lab_tac_CurrentPurchasedEmissionCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CurrentReceivablesFromIncomeTaxes_79b6d4b6-f0f8-4d29-8b8a-5d8fd79acd43_terseLabel_en-US" xlink:label="lab_tac_CurrentReceivablesFromIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes receivables</link:label>
    <link:label id="lab_tac_CurrentReceivablesFromIncomeTaxes_label_en-US" xlink:label="lab_tac_CurrentReceivablesFromIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Receivables From Income Taxes</link:label>
    <link:label id="lab_tac_CurrentReceivablesFromIncomeTaxes_documentation_en-US" xlink:label="lab_tac_CurrentReceivablesFromIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivables from income taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CurrentReceivablesFromIncomeTaxes" xlink:href="tac-20191231.xsd#tac_CurrentReceivablesFromIncomeTaxes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CurrentReceivablesFromIncomeTaxes" xlink:to="lab_tac_CurrentReceivablesFromIncomeTaxes" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows_1c025116-4889-475f-bfba-ccf53f84c982_terseLabel_en-US" xlink:label="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in net inflows (outflows) of cash</link:label>
    <link:label id="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows_label_en-US" xlink:label="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in net capital inflows (outflows)</link:label>
    <link:label id="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows_documentation_en-US" xlink:label="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in net capital inflows (outflows)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:href="tac-20191231.xsd#tac_Increasedecreaseinnetcapitalinflowsoutflows"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:to="lab_tac_Increasedecreaseinnetcapitalinflowsoutflows" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EntitysTotalForExternalCreditGradesMember_8d6f2ec9-9510-490d-82b5-6fcc2651f48c_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForExternalCreditGradesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for external credit grades [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForExternalCreditGradesMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForExternalCreditGradesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for external credit grades [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForExternalCreditGradesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EntitysTotalForExternalCreditGradesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForExternalCreditGradesMember" xlink:to="lab_ifrs-full_EntitysTotalForExternalCreditGradesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue_d9510279-911a-480a-a178-8ec57f84a481_terseLabel_en-US" xlink:label="lab_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Present value of minimum lease receipts</link:label>
    <link:label id="lab_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue_label_en-US" xlink:label="lab_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum finance lease payments receivable, at present value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue" xlink:to="lab_ifrs-full_MinimumFinanceLeasePaymentsReceivableAtPresentValue" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofinterestsinotherentitiesAbstract_a3df03b9-ff37-4a7b-810e-b0d1352bcdc3_terseLabel_en-US" xlink:label="lab_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in other entities [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofinterestsinotherentitiesAbstract_label_en-US" xlink:label="lab_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in other entities [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofinterestsinotherentitiesAbstract_documentation_en-US" xlink:label="lab_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in other entities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:href="tac-20191231.xsd#tac_DisclosureofinterestsinotherentitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:to="lab_tac_DisclosureofinterestsinotherentitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock_4dcb54ca-43b0-4877-95a4-622b45ccec78_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of ownership and equity participation in TransAlta Renewables</link:label>
    <link:label id="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Noncontrolling Interests [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Noncontrolling Interests [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureOfNoncontrollingInterestsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:to="lab_tac_DisclosureOfNoncontrollingInterestsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CommodityPriceRiskMember_ec08153c-2481-4cfc-82db-279ec1f23368_terseLabel_en-US" xlink:label="lab_ifrs-full_CommodityPriceRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity risk management</link:label>
    <link:label id="lab_ifrs-full_CommodityPriceRiskMember_label_en-US" xlink:label="lab_ifrs-full_CommodityPriceRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity price risk [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CommodityPriceRiskMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CommodityPriceRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CommodityPriceRiskMember" xlink:to="lab_ifrs-full_CommodityPriceRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RCSolarLLCMember_aa3a14c7-614a-42fb-a0a2-22024148a21f_verboseLabel_en-US" xlink:label="lab_tac_RCSolarLLCMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Solar assets</link:label>
    <link:label id="lab_tac_RCSolarLLCMember_label_en-US" xlink:label="lab_tac_RCSolarLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RC Solar, LLC [Member]</link:label>
    <link:label id="lab_tac_RCSolarLLCMember_documentation_en-US" xlink:label="lab_tac_RCSolarLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RC Solar, LLC [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RCSolarLLCMember" xlink:href="tac-20191231.xsd#tac_RCSolarLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RCSolarLLCMember" xlink:to="lab_tac_RCSolarLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AccruedCurrentLiabilitiesMember_3c8c0e85-0af6-4b09-8153-b3c211088b8a_terseLabel_en-US" xlink:label="lab_tac_AccruedCurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued current liabilities</link:label>
    <link:label id="lab_tac_AccruedCurrentLiabilitiesMember_label_en-US" xlink:label="lab_tac_AccruedCurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Current Liabilities [Member]</link:label>
    <link:label id="lab_tac_AccruedCurrentLiabilitiesMember_documentation_en-US" xlink:label="lab_tac_AccruedCurrentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Current Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AccruedCurrentLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_AccruedCurrentLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AccruedCurrentLiabilitiesMember" xlink:to="lab_tac_AccruedCurrentLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherReservesMember_f1ebe508-0cb5-4fcf-a181-da76b57b3774_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherReservesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other reserves [member]</link:label>
    <link:label id="lab_ifrs-full_OtherReservesMember_label_en-US" xlink:label="lab_ifrs-full_OtherReservesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other reserves [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherReservesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherReservesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherReservesMember" xlink:to="lab_ifrs-full_OtherReservesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccumulatedImpairmentMember_0062d1b0-445c-4af7-afa4-2094ccb7ef08_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedImpairmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated impairment</link:label>
    <link:label id="lab_ifrs-full_AccumulatedImpairmentMember_label_en-US" xlink:label="lab_ifrs-full_AccumulatedImpairmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated impairment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccumulatedImpairmentMember" xlink:to="lab_ifrs-full_AccumulatedImpairmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_4043555e-c312-45fa-a62d-db606d431b63_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash proceeds</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from losing control of subsidiaries or other businesses, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory_3bab3690-c431-4596-9856-c33f1dd265a4_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of borrowing costs [text block]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of borrowing costs [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfBorrowingCostsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CurrentDeferredStrippingCosts_62c26518-56fd-45f1-a136-e93d60253e01_terseLabel_en-US" xlink:label="lab_tac_CurrentDeferredStrippingCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred stripping costs</link:label>
    <link:label id="lab_tac_CurrentDeferredStrippingCosts_label_en-US" xlink:label="lab_tac_CurrentDeferredStrippingCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Deferred Stripping Costs</link:label>
    <link:label id="lab_tac_CurrentDeferredStrippingCosts_documentation_en-US" xlink:label="lab_tac_CurrentDeferredStrippingCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Deferred Stripping Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CurrentDeferredStrippingCosts" xlink:href="tac-20191231.xsd#tac_CurrentDeferredStrippingCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CurrentDeferredStrippingCosts" xlink:to="lab_tac_CurrentDeferredStrippingCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_9e285e00-ae75-42c9-83da-a6feccc729b8_terseLabel_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement [member]</link:label>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_label_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedMeasurementMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AggregatedMeasurementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AggregatedMeasurementMember" xlink:to="lab_ifrs-full_AggregatedMeasurementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ElectricityPriceEnergy_78eb1cf2-9ee4-456a-a9a8-eaa129e67f11_terseLabel_en-US" xlink:label="lab_tac_ElectricityPriceEnergy" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Electricity prices</link:label>
    <link:label id="lab_tac_ElectricityPriceEnergy_label_en-US" xlink:label="lab_tac_ElectricityPriceEnergy" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Electricity Price, Energy</link:label>
    <link:label id="lab_tac_ElectricityPriceEnergy_documentation_en-US" xlink:label="lab_tac_ElectricityPriceEnergy" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Electricity Price, Energy</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ElectricityPriceEnergy" xlink:href="tac-20191231.xsd#tac_ElectricityPriceEnergy"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ElectricityPriceEnergy" xlink:to="lab_tac_ElectricityPriceEnergy" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfProductsAndServicesTable_e61fbc68-dfc1-4704-be24-f94561d0e5ae_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfProductsAndServicesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of products and services [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfProductsAndServicesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfProductsAndServicesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of products and services [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfProductsAndServicesTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfProductsAndServicesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfProductsAndServicesTable" xlink:to="lab_ifrs-full_DisclosureOfProductsAndServicesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LakeswindWindFarmMember_f7d3e858-9bae-4e39-b25e-f157908db8a2_terseLabel_en-US" xlink:label="lab_tac_LakeswindWindFarmMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind Wind Farm</link:label>
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    <link:label id="lab_ifrs-full_DividendsPaidClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends paid, classified as financing activities</link:label>
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    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement_9d6c8658-ff38-4931-9f28-2b397537d56d_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price (in dollars per share)</link:label>
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    <link:label id="lab_ifrs-full_BorrowingCostsIncurred_0c43739c-5dc5-4566-8380-258aaef45599_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingCostsIncurred" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowing costs incurred</link:label>
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    <link:label id="lab_tac_BalanceSheetLocation1Axis_022170df-db88-4857-b469-665d6b5f808e_terseLabel_en-US" xlink:label="lab_tac_BalanceSheetLocation1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
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    <link:label id="lab_tac_DerivativeNotionalAmountSold_085a2ecd-724b-4465-b64e-da9775667957_terseLabel_en-US" xlink:label="lab_tac_DerivativeNotionalAmountSold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount sold</link:label>
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    <link:label id="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_f052ee9f-3e6a-4112-95b8-55484e0aef99_terseLabel_en-US" xlink:label="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of translation on foreign currency cash</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsTable_ead392fa-ccaf-4ba4-b480-0cb9bb883cd2_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [table]</link:label>
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    <link:label id="lab_ifrs-full_ContractDurationAxis_047398c2-b70c-4752-b18f-3e0b8177187f_terseLabel_en-US" xlink:label="lab_ifrs-full_ContractDurationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract duration [axis]</link:label>
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    <link:label id="lab_ifrs-full_LegalProceedingsProvisionMember_7fc1b0a8-d094-4606-9380-ad273f0a63dc_terseLabel_en-US" xlink:label="lab_ifrs-full_LegalProceedingsProvisionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line loss rule proceeding</link:label>
    <link:label id="lab_ifrs-full_LegalProceedingsProvisionMember_label_en-US" xlink:label="lab_ifrs-full_LegalProceedingsProvisionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal proceedings provision [member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_03047404-988e-46ba-a2d6-6fab7d248db9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Payment Plans</link:label>
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    <link:label id="lab_tac_NetInterestExpenseAbstract_dbcff362-0e2f-4908-abb6-e81ae7bbf0d8_terseLabel_en-US" xlink:label="lab_tac_NetInterestExpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Interest Expense [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax_152399a1-b87e-4ae9-a619-430ab2435705_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on cash flow hedges, before tax</link:label>
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    <link:label id="lab_tac_InterestRateContractsMember_label_en-US" xlink:label="lab_tac_InterestRateContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Contracts [Member]</link:label>
    <link:label id="lab_tac_InterestRateContractsMember_documentation_en-US" xlink:label="lab_tac_InterestRateContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Rate Contracts [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_InterestRateContractsMember" xlink:href="tac-20191231.xsd#tac_InterestRateContractsMember"/>
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    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD1Member_documentation_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Receipts (Expenditures), CAD 1 [Member]</link:label>
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    <link:label id="lab_tac_WindandSolarMember_eeabcdd6-e69d-46b2-b468-c3b33b367530_terseLabel_en-US" xlink:label="lab_tac_WindandSolarMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind and Solar</link:label>
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    <link:label id="lab_tac_WindandSolarMember_documentation_en-US" xlink:label="lab_tac_WindandSolarMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind and Solar [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_WindandSolarMember" xlink:href="tac-20191231.xsd#tac_WindandSolarMember"/>
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    <link:label id="lab_tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm_793b21b2-7f7c-4133-b939-762eef9eddea_terseLabel_en-US" xlink:label="lab_tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from performance obligations satisfied or partially satisfied in previous periods, term</link:label>
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    <link:label id="lab_tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm_documentation_en-US" xlink:label="lab_tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue From Performance Obligations Satisfied Or Partially Satisfied In Previous Periods Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm" xlink:href="tac-20191231.xsd#tac_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriodsTerm"/>
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    <link:label id="lab_tac_LongTermDebtTypeDomain_bdc50883-02d9-4b53-be42-908c3ddc1961_terseLabel_en-US" xlink:label="lab_tac_LongTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:label id="lab_tac_LongTermDebtTypeDomain_label_en-US" xlink:label="lab_tac_LongTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:label id="lab_tac_LongTermDebtTypeDomain_documentation_en-US" xlink:label="lab_tac_LongTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Long-Term Debt, Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongTermDebtTypeDomain" xlink:href="tac-20191231.xsd#tac_LongTermDebtTypeDomain"/>
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    <link:label id="lab_tac_OperationsMaintenanceAndAdministrationMember_c9b2a2b4-27ac-4b58-b538-09a54760e1d0_terseLabel_en-US" xlink:label="lab_tac_OperationsMaintenanceAndAdministrationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operations, maintenance and administration</link:label>
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    <link:label id="lab_tac_OperationsMaintenanceAndAdministrationMember_documentation_en-US" xlink:label="lab_tac_OperationsMaintenanceAndAdministrationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operations, Maintenance, And Administration [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OperationsMaintenanceAndAdministrationMember" xlink:href="tac-20191231.xsd#tac_OperationsMaintenanceAndAdministrationMember"/>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_412e1a07-2d48-464c-835b-5c0320eab541_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow from (used in) operating, investing, and financing activities</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable_035fcc6d-e9d2-4562-8a60-965f7cc43daf_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of liabilities [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of liabilities [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable"/>
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    <link:label id="lab_tac_DerivativeInstrumentsNewContractsMember_documentation_en-US" xlink:label="lab_tac_DerivativeInstrumentsNewContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instruments, New Contracts [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeInstrumentsNewContractsMember" xlink:href="tac-20191231.xsd#tac_DerivativeInstrumentsNewContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeInstrumentsNewContractsMember" xlink:to="lab_tac_DerivativeInstrumentsNewContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_acb8fddf-42b4-4545-81a3-6e94b83bd483_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortized cost</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_label_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets at amortised cost, category [member]</link:label>
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    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember_c91d12ad-cc06-42c0-8cc9-f2f4e3bed03d_terseLabel_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options [member]</link:label>
    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember_label_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options [member]</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInBaseFairValue_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInBaseFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Base Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInBaseFairValue" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInBaseFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInBaseFairValue" xlink:to="lab_tac_IncreaseDecreaseInBaseFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueFromGovernmentGrants_5ad1b1f0-47f1-4839-bd9b-0292c32901a6_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income from government grants</link:label>
    <link:label id="lab_ifrs-full_RevenueFromGovernmentGrants_label_en-US" xlink:label="lab_ifrs-full_RevenueFromGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income from government grants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromGovernmentGrants" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RevenueFromGovernmentGrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueFromGovernmentGrants" xlink:to="lab_ifrs-full_RevenueFromGovernmentGrants" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower_6cb86487-a88d-477e-b737-3e3289653bb6_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in contractual power capacity (in megawatts)</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower_label_en-US" xlink:label="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Contractual Power Capacity, Power</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Contractual Power Capacity, Power</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseinContractualPowerCapacityPower"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:to="lab_tac_IncreaseDecreaseinContractualPowerCapacityPower" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ChangesInPropertyPlantAndEquipment_94d74176-9900-4306-945d-8db31629fb7f_terseLabel_en-US" xlink:label="lab_ifrs-full_ChangesInPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_ChangesInPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_ChangesInPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInPropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ChangesInPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ChangesInPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_ChangesInPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_4465ec16-e570-482f-9531-1b804786ed8d_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation (Note 28)</link:label>
    <link:label id="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_label_en-US" xlink:label="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current net defined benefit liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:to="lab_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_StockPurchaseAgreementSharesNumberAuthorized_a387c22e-a34a-4a25-9f1e-b07e177a7893_terseLabel_en-US" xlink:label="lab_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock purchase agreement, number of shares authorized</link:label>
    <link:label id="lab_tac_StockPurchaseAgreementSharesNumberAuthorized_label_en-US" xlink:label="lab_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Purchase Agreement, Shares, Number Authorized</link:label>
    <link:label id="lab_tac_StockPurchaseAgreementSharesNumberAuthorized_documentation_en-US" xlink:label="lab_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Purchase Agreement, Shares, Number Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:href="tac-20191231.xsd#tac_StockPurchaseAgreementSharesNumberAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:to="lab_tac_StockPurchaseAgreementSharesNumberAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialAssetsMember_2be5c751-88ed-4d79-b832-33ee459f554d_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, class [member]</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsMember_label_en-US" xlink:label="lab_ifrs-full_FinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, class [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialAssetsMember" xlink:to="lab_ifrs-full_FinancialAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CarryingAmountMember_bcb206a9-dcba-4088-b0ad-2240c64e8b2a_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount [member]</link:label>
    <link:label id="lab_ifrs-full_CarryingAmountMember_label_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CarryingAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CarryingAmountMember" xlink:to="lab_ifrs-full_CarryingAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestExpenseOnBorrowings_3df12c7b-4566-4f62-8385-a69bc381c6f1_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on borrowings</link:label>
    <link:label id="lab_ifrs-full_InterestExpenseOnBorrowings_label_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnBorrowings" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestExpenseOnBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestExpenseOnBorrowings" xlink:to="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems_963fe246-f702-4408-9587-a92f41188a6f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:to="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherBorrowings_8eac52a9-9a3f-4935-9cd2-064d18e3d532_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchangeable securities</link:label>
    <link:label id="lab_ifrs-full_OtherBorrowings_40ec46c6-6733-44f4-8ea3-1076590eb260_verboseLabel_en-US" xlink:label="lab_ifrs-full_OtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other borrowings</link:label>
    <link:label id="lab_ifrs-full_OtherBorrowings_label_en-US" xlink:label="lab_ifrs-full_OtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherBorrowings" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherBorrowings" xlink:to="lab_ifrs-full_OtherBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_23600595-3e7f-4b6f-8b82-751e8057295a_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current service cost</link:label>
    <link:label id="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_28ba7261-b506-4064-b391-cc0275cbad55_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current service cost</link:label>
    <link:label id="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current service cost, net defined benefit liability (asset)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:to="lab_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract_050be4d5-c0b7-4d55-b9eb-6d70299ea923_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [abstract]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinancialAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:to="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember_ed143894-d3cb-4162-9707-73f3395004b0_terseLabel_en-US" xlink:label="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Assets</link:label>
    <link:label id="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember_label_en-US" xlink:label="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sarnia Cogeneration Plant, Le Nordais Wind Farm, And Ragged Chute Hydro Facility (Canadian Assets) [Member]</link:label>
    <link:label id="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember_documentation_en-US" xlink:label="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sarnia Cogeneration Plant, Le Nordais Wind Farm, and Ragged Chute Hydro Facility (Canadian Assets) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:href="tac-20191231.xsd#tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:to="lab_tac_SarniaCogenerationPlantLeNordaisWindFarmAndRaggedChuteHydroFacilityCanadianAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FinancialAssetsOtherCategoryMember_4b7ff718-399d-43a6-8845-dcaaa0a41b71_terseLabel_en-US" xlink:label="lab_tac_FinancialAssetsOtherCategoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other financial assets (FVTPL)</link:label>
    <link:label id="lab_tac_FinancialAssetsOtherCategoryMember_label_en-US" xlink:label="lab_tac_FinancialAssetsOtherCategoryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Assets, Other, Category [Member]</link:label>
    <link:label id="lab_tac_FinancialAssetsOtherCategoryMember_documentation_en-US" xlink:label="lab_tac_FinancialAssetsOtherCategoryMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Assets, Other, Category [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FinancialAssetsOtherCategoryMember" xlink:href="tac-20191231.xsd#tac_FinancialAssetsOtherCategoryMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FinancialAssetsOtherCategoryMember" xlink:to="lab_tac_FinancialAssetsOtherCategoryMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_HedgingInstrumentsAxis_769402c2-7938-4aef-97ec-e9c84e15aa02_terseLabel_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instruments [axis]</link:label>
    <link:label id="lab_ifrs-full_HedgingInstrumentsAxis_label_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instruments [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_HedgingInstrumentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis" xlink:to="lab_ifrs-full_HedgingInstrumentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_6ab4365f-9ada-49ca-9116-25a9f7539f93_terseLabel_en-US" xlink:label="lab_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected income tax expense (recovery)</link:label>
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    <link:label id="lab_ifrs-full_AccumulatedOtherComprehensiveIncome_a26027b9-979c-4270-b90d-9e7fa7c4e9bc_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated other comprehensive income (Note 26)</link:label>
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    <link:label id="lab_tac_ComponentsofNoncurrentDefinedBenefitPlanLiabilitiesandOtherLongTermLiabilitiesTableTextBlock_2ccb53cc-e37c-4a13-9d5e-fa54fcf3a331_terseLabel_en-US" xlink:label="lab_tac_ComponentsofNoncurrentDefinedBenefitPlanLiabilitiesandOtherLongTermLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of Defined Benefit Obligations and Other Long-Term Liabilities</link:label>
    <link:label id="lab_tac_ComponentsofNoncurrentDefinedBenefitPlanLiabilitiesandOtherLongTermLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_tac_ComponentsofNoncurrentDefinedBenefitPlanLiabilitiesandOtherLongTermLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of Noncurrent Defined Benefit Plan Liabilities and Other Long-Term Liabilities [Table Text Block]</link:label>
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    <link:label id="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock_f266d1a0-a51c-4fc7-8f5d-686513c5ccca_terseLabel_en-US" xlink:label="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and Other Receivables</link:label>
    <link:label id="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock_label_en-US" xlink:label="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of Trade and Other Receivables [Table Text Block]</link:label>
    <link:label id="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock_documentation_en-US" xlink:label="lab_tac_ComponentsofTradeandOtherReceivablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of Trade and Other Receivables [Table Text Block]</link:label>
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    <link:label id="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable_b675259e-3d3a-4b10-8d78-1e9e0bac4e72_terseLabel_en-US" xlink:label="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of outstanding common shares at which Shareholder Rights Plan may take effect</link:label>
    <link:label id="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable_label_en-US" xlink:label="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholder Rights Plan, Percentage Of Outstanding Common Shares Potentially Purchased At Which Shareholder Rights Are Exercisable</link:label>
    <link:label id="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable_documentation_en-US" xlink:label="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholder Rights Plan, Percentage Of Outstanding Common Shares Potentially Purchased At Which Shareholder Rights Are Exercisable</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable" xlink:to="lab_tac_ShareholderRightsPlanPercentageOfOutstandingCommonSharesPotentiallyPurchasedAtWhichShareholderRightsAreExercisable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_7635c50f-16a3-42e8-9299-f71299961ff8_totalLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in cash and cash equivalents</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_42e4e37f-0e57-4f95-b7c2-b1a46544a792_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of intangible assets other than goodwill [axis]</link:label>
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    <link:label id="lab_tac_CommitmentforEnergyBillInitiatives_bea08b82-102b-44ed-8b11-10742b305a7e_terseLabel_en-US" xlink:label="lab_tac_CommitmentforEnergyBillInitiatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Energy Transition Bill</link:label>
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    <link:label id="lab_tac_BrookfieldRenewablePartnersMember_e2341cf1-8101-47a0-862c-8694418365fc_terseLabel_en-US" xlink:label="lab_tac_BrookfieldRenewablePartnersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Brookfield Renewable Partners</link:label>
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    <link:label id="lab_tac_BrookfieldRenewablePartnersMember_documentation_en-US" xlink:label="lab_tac_BrookfieldRenewablePartnersMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Brookfield Renewable Partners</link:label>
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    <link:label id="lab_ifrs-full_RepaymentsOfNoncurrentBorrowings_4e10bdfb-47f0-42d9-aab8-3523c8409c9f_verboseLabel_en-US" xlink:label="lab_ifrs-full_RepaymentsOfNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal payment</link:label>
    <link:label id="lab_ifrs-full_RepaymentsOfNoncurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_RepaymentsOfNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of non-current borrowings</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_426fa243-6d37-4e8e-a73d-6b7200ff933b_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for leases [text block]</link:label>
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    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansthrough2026Member_e9ee771e-a4af-45c3-b4ac-fa0465283fc7_terseLabel_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansthrough2026Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, through 2026</link:label>
    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansthrough2026Member_label_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansthrough2026Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Post-Employment Benefit Plans, through 2026 [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherPostEmploymentBenefitPlansthrough2026Member" xlink:to="lab_tac_OtherPostEmploymentBenefitPlansthrough2026Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherInterestExpense_19e7b2dc-3659-4219-9817-030b85af01be_terseLabel_en-US" xlink:label="lab_tac_OtherInterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_tac_OtherInterestExpense_label_en-US" xlink:label="lab_tac_OtherInterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Interest Expense</link:label>
    <link:label id="lab_tac_OtherInterestExpense_documentation_en-US" xlink:label="lab_tac_OtherInterestExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Interest Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherInterestExpense" xlink:href="tac-20191231.xsd#tac_OtherInterestExpense"/>
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    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass_de463dd1-1f54-40b6-9ac2-86717562df7b_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount sold</link:label>
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    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount, Emissions Sold, Mass</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountEmissionsSoldMass"/>
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    <link:label id="lab_ifrs-full_CurrentAssets_e30f70bf-d0dc-4dc4-b7aa-9ad156f9d1a1_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets</link:label>
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    <link:label id="lab_ifrs-full_CurrentAssets_label_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets</link:label>
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    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesExpiringIn2018Member_20ce55b6-f22c-431e-94fd-2b48fbbc0635_terseLabel_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesExpiringIn2018Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed bilateral credit facilities expiring in 2018</link:label>
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    <link:label id="lab_tac_AustralianGasMember_f1414110-c097-4f6b-89d2-72bd062490f9_terseLabel_en-US" xlink:label="lab_tac_AustralianGasMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Australian Gas</link:label>
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    <link:label id="lab_tac_KentBreezeAndWinteringHillsFacilitiesTheWindFarmsMember_1595d515-516a-4f9d-bf5a-269cf801b9ce_terseLabel_en-US" xlink:label="lab_tac_KentBreezeAndWinteringHillsFacilitiesTheWindFarmsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wind Farms</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory_d67fe040-5bfa-43fc-ad5b-440682aaa894_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies</link:label>
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    <link:label id="lab_tac_MelancthonWolfeWindL.PMember_80609b12-1229-4457-ae2a-59c75c1bb5d8_terseLabel_en-US" xlink:label="lab_tac_MelancthonWolfeWindL.PMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Melancthon-Wolfe Wind</link:label>
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    <link:label id="lab_invest_DerivativeNonmonetaryNotionalAmount_0187f559-1869-4896-9764-df306665307d_terseLabel_en-US" xlink:label="lab_invest_DerivativeNonmonetaryNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount</link:label>
    <link:label id="lab_invest_DerivativeNonmonetaryNotionalAmount_label_en-US" xlink:label="lab_invest_DerivativeNonmonetaryNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_invest_DerivativeNonmonetaryNotionalAmount" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNonmonetaryNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNonmonetaryNotionalAmount" xlink:to="lab_invest_DerivativeNonmonetaryNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_7d07783e-3974-429c-89f5-61c7ad58fda5_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_0784595a-eb02-47f9-817d-8380df8e6b70_verboseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income, attributable to non-controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SemCAMSMidstreamULCMember_a9f9a8d8-03ff-41a6-a19c-7932dd05c12b_terseLabel_en-US" xlink:label="lab_tac_SemCAMSMidstreamULCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SemCAMS</link:label>
    <link:label id="lab_tac_SemCAMSMidstreamULCMember_label_en-US" xlink:label="lab_tac_SemCAMSMidstreamULCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SemCAMS Midstream ULC [Member]</link:label>
    <link:label id="lab_tac_SemCAMSMidstreamULCMember_documentation_en-US" xlink:label="lab_tac_SemCAMSMidstreamULCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">SemCAMS Midstream ULC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SemCAMSMidstreamULCMember" xlink:href="tac-20191231.xsd#tac_SemCAMSMidstreamULCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SemCAMSMidstreamULCMember" xlink:to="lab_tac_SemCAMSMidstreamULCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss_021fa929-e789-4b89-91b3-450dcc9b07cc_terseLabel_en-US" xlink:label="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on hedge ineffectiveness recognised in profit or loss</link:label>
    <link:label id="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss_label_en-US" xlink:label="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on hedge ineffectiveness recognised in profit or loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss" xlink:to="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CurrentFinancialAssetsMember_37d58865-01e5-4979-85ff-7e456d242873_terseLabel_en-US" xlink:label="lab_tac_CurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current</link:label>
    <link:label id="lab_tac_CurrentFinancialAssetsMember_d8f704c5-666e-430d-b47c-8064c23a5167_verboseLabel_en-US" xlink:label="lab_tac_CurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current financial assets</link:label>
    <link:label id="lab_tac_CurrentFinancialAssetsMember_label_en-US" xlink:label="lab_tac_CurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Financial Assets [Member]</link:label>
    <link:label id="lab_tac_CurrentFinancialAssetsMember_documentation_en-US" xlink:label="lab_tac_CurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Financial Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CurrentFinancialAssetsMember" xlink:href="tac-20191231.xsd#tac_CurrentFinancialAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CurrentFinancialAssetsMember" xlink:to="lab_tac_CurrentFinancialAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TitleofIndividuals1Member_3b8e575c-961e-4051-bd59-ce0738ef9ee8_terseLabel_en-US" xlink:label="lab_tac_TitleofIndividuals1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of Individuals1 [Member]</link:label>
    <link:label id="lab_tac_TitleofIndividuals1Member_label_en-US" xlink:label="lab_tac_TitleofIndividuals1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of Individuals1 [Member]</link:label>
    <link:label id="lab_tac_TitleofIndividuals1Member_documentation_en-US" xlink:label="lab_tac_TitleofIndividuals1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of Individuals1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TitleofIndividuals1Member" xlink:href="tac-20191231.xsd#tac_TitleofIndividuals1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TitleofIndividuals1Member" xlink:to="lab_tac_TitleofIndividuals1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PlanName1Domain_c0536ffb-0b95-4641-827c-faaf70aa62be_terseLabel_en-US" xlink:label="lab_tac_PlanName1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:label id="lab_tac_PlanName1Domain_label_en-US" xlink:label="lab_tac_PlanName1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name1 [Domain]</link:label>
    <link:label id="lab_tac_PlanName1Domain_documentation_en-US" xlink:label="lab_tac_PlanName1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Plan Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PlanName1Domain" xlink:href="tac-20191231.xsd#tac_PlanName1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PlanName1Domain" xlink:to="lab_tac_PlanName1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory_0a88e802-ddd3-4001-8530-76394dc861d5_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in decommissioning and other provision balances</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfOtherProvisionsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfOtherProvisionsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Customer1Member_87b0726b-0181-4846-9300-bacf72fb5cb4_terseLabel_en-US" xlink:label="lab_tac_Customer1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer 1</link:label>
    <link:label id="lab_tac_Customer1Member_label_en-US" xlink:label="lab_tac_Customer1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer 1 [Member]</link:label>
    <link:label id="lab_tac_Customer1Member_documentation_en-US" xlink:label="lab_tac_Customer1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Customer1Member" xlink:href="tac-20191231.xsd#tac_Customer1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Customer1Member" xlink:to="lab_tac_Customer1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan_00207da8-9939-4652-b86b-fa6f81c071b1_terseLabel_en-US" xlink:label="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts receivable under Employee Share Purchase Plan</link:label>
    <link:label id="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan_label_en-US" xlink:label="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Under Employee Share Purchase Plan</link:label>
    <link:label id="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan_documentation_en-US" xlink:label="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables Under Employee Share Purchase Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:href="tac-20191231.xsd#tac_ReceivablesUnderEmployeeSharePurchasePlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:to="lab_tac_ReceivablesUnderEmployeeSharePurchasePlan" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeStatementAbstract_87ba7354-19ed-49ff-9bcf-1191d16fd315_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit or loss [abstract]</link:label>
    <link:label id="lab_ifrs-full_IncomeStatementAbstract_label_en-US" xlink:label="lab_ifrs-full_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit or loss [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeStatementAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeStatementAbstract" xlink:to="lab_ifrs-full_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract_72b833f7-8cc0-4f9a-bcc4-c5e5190a062f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [abstract]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems_c8490935-b13b-4364-9d73-1e8c3dd57196_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognised finance lease as assets by lessee [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognised finance lease as assets by lessee [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems" xlink:to="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LongtermBorrowings_c931cbb9-f5a7-4701-bd09-ea86bf1b2a9a_terseLabel_en-US" xlink:label="lab_ifrs-full_LongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit facilities, long-term debt, and finance lease obligations (Note 22)</link:label>
    <link:label id="lab_ifrs-full_LongtermBorrowings_label_en-US" xlink:label="lab_ifrs-full_LongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current portion of non-current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LongtermBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LongtermBorrowings" xlink:to="lab_ifrs-full_LongtermBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember_c00d758a-452a-496c-bdb5-aa7c9b7b5912_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated depreciation</link:label>
    <link:label id="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember_fafe034d-5cbb-45cd-9128-7ec063ca63f9_verboseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated amortization</link:label>
    <link:label id="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember_label_en-US" xlink:label="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated depreciation and amortisation [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:to="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProductsAndServicesMember_4c3ac879-9636-4ca9-82e2-34e50d660256_terseLabel_en-US" xlink:label="lab_ifrs-full_ProductsAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Products and services [member]</link:label>
    <link:label id="lab_ifrs-full_ProductsAndServicesMember_label_en-US" xlink:label="lab_ifrs-full_ProductsAndServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Products and services [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProductsAndServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProductsAndServicesMember" xlink:to="lab_ifrs-full_ProductsAndServicesMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_caa28a37-41a4-4d7b-bc73-a4e015310ef0_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for segment consolidation items [member]</link:label>
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    <link:label id="lab_tac_KentBreezeWindFarmMember_7024f874-d4f2-4c42-bcec-b4f1d2bc1c64_terseLabel_en-US" xlink:label="lab_tac_KentBreezeWindFarmMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Breeze</link:label>
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    <link:label id="lab_tac_HydroMember_9a635bc1-5ad2-451a-b7a6-d2bc625df0ef_terseLabel_en-US" xlink:label="lab_tac_HydroMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hydro</link:label>
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    <link:label id="lab_tac_LettersOfCreditMember_0100f88d-1e65-4c21-b6bb-de8d54b75c07_terseLabel_en-US" xlink:label="lab_tac_LettersOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letters Of Credit [Member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems_bf280303-912e-4aaf-9243-9a9be2d9da28_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfChangesInAccountingEstimatesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting estimates [line items]</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_8b9cf3d0-fb6f-4536-8774-5fe681a0ca07_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings (loss) attributable to common shareholders</link:label>
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    <link:label id="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent_adf63ec2-c355-4bb2-bb1a-70ce03074b91_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent</link:label>
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    <link:label id="lab_tac_ForeigndenominatedDebtMember_8047f30e-1f18-4f9d-89f1-40f0bef08136_terseLabel_en-US" xlink:label="lab_tac_ForeigndenominatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign-denominated debt</link:label>
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    <link:label id="lab_tac_LineofCreditFacilityIncreaseDecreaseNet1_250ec62d-e35d-477a-92a9-96fb3c793b02_terseLabel_en-US" xlink:label="lab_tac_LineofCreditFacilityIncreaseDecreaseNet1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of credit facility, increase (decrease)</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseDueToInterestAccruedAndExpensedDuringPeriodContractLiabilities_a58f9db0-6676-4420-8f5e-d83ca517f605_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseDueToInterestAccruedAndExpensedDuringPeriodContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increases due to interest accrued and expensed during the period</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseDueToInterestAccruedAndExpensedDuringPeriodContractLiabilities_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseDueToInterestAccruedAndExpensedDuringPeriodContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Due To Interest Accrued And Expensed During Period, Contract Liabilities</link:label>
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    <link:label id="lab_ifrs-full_ConstructionInProgressMember_ddbd793e-e2cf-4f5b-907b-c1b417d9a570_terseLabel_en-US" xlink:label="lab_ifrs-full_ConstructionInProgressMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets&#160;under construction</link:label>
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    <link:label id="lab_tac_TransAltaRenewablesInc.Member_4c8d2ca0-f0a0-4722-8bfc-424c824cbf88_terseLabel_en-US" xlink:label="lab_tac_TransAltaRenewablesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Renewables</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_TransAltaRenewablesInc.Member" xlink:href="tac-20191231.xsd#tac_TransAltaRenewablesInc.Member"/>
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    <link:label id="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation_a20f5b4f-82be-4933-ba5b-79613da07ee4_terseLabel_en-US" xlink:label="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalisation rate of borrowing costs eligible for capitalisation</link:label>
    <link:label id="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation_label_en-US" xlink:label="lab_ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capitalisation rate of borrowing costs eligible for capitalisation</link:label>
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    <link:label id="lab_tac_OthersMember_8ace2d44-fa04-44d9-a641-16a1e35c3697_terseLabel_en-US" xlink:label="lab_tac_OthersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Others</link:label>
    <link:label id="lab_tac_OthersMember_label_en-US" xlink:label="lab_tac_OthersMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Others [Member]</link:label>
    <link:label id="lab_tac_OthersMember_documentation_en-US" xlink:label="lab_tac_OthersMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Others [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OthersMember" xlink:href="tac-20191231.xsd#tac_OthersMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OthersMember" xlink:to="lab_tac_OthersMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_KentHillsWindL.P.Member_6654dd21-a54a-4222-b27a-5293d33a09f3_terseLabel_en-US" xlink:label="lab_tac_KentHillsWindL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills Wind L.P.</link:label>
    <link:label id="lab_tac_KentHillsWindL.P.Member_label_en-US" xlink:label="lab_tac_KentHillsWindL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills Wind L.P. [Member]</link:label>
    <link:label id="lab_tac_KentHillsWindL.P.Member_documentation_en-US" xlink:label="lab_tac_KentHillsWindL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills Wind LP [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_KentHillsWindL.P.Member" xlink:href="tac-20191231.xsd#tac_KentHillsWindL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_KentHillsWindL.P.Member" xlink:to="lab_tac_KentHillsWindL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingOtherEquityInstruments_66ae671d-bb28-4d23-b4b3-cc5d1b27f1bd_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of exchangeable securities</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingOtherEquityInstruments_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from issuing other equity instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromIssuingOtherEquityInstruments" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProceedsFromIssuingOtherEquityInstruments"/>
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    <link:label id="lab_ifrs-full_SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares_89799d85-acb4-460a-94e5-5a90552c7ade_terseLabel_en-US" xlink:label="lab_ifrs-full_SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares authorized (in shares)</link:label>
    <link:label id="lab_ifrs-full_SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares_label_en-US" xlink:label="lab_ifrs-full_SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares reserved for issue under options and contracts for sale of shares</link:label>
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    <link:label id="lab_tac_RestrictedCashMember_825f9bc6-60c8-4f0f-a6ce-2666a009ed1e_terseLabel_en-US" xlink:label="lab_tac_RestrictedCashMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_tac_RestrictedCashMember_label_en-US" xlink:label="lab_tac_RestrictedCashMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash [Member]</link:label>
    <link:label id="lab_tac_RestrictedCashMember_documentation_en-US" xlink:label="lab_tac_RestrictedCashMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Cash [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RestrictedCashMember" xlink:href="tac-20191231.xsd#tac_RestrictedCashMember"/>
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    <link:label id="lab_tac_Undrawncreditfacilities_1a71c891-c1d6-4d86-bc8c-e8fb55f1fdae_terseLabel_en-US" xlink:label="lab_tac_Undrawncreditfacilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undrawn credit facilities</link:label>
    <link:label id="lab_tac_Undrawncreditfacilities_label_en-US" xlink:label="lab_tac_Undrawncreditfacilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undrawn credit facilities</link:label>
    <link:label id="lab_tac_Undrawncreditfacilities_documentation_en-US" xlink:label="lab_tac_Undrawncreditfacilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undrawn credit facilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Undrawncreditfacilities" xlink:href="tac-20191231.xsd#tac_Undrawncreditfacilities"/>
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    <link:label id="lab_srt_SegmentGeographicalDomain_bdbf0306-b926-4650-b94c-466231e61264_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical [Domain]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain" xlink:to="lab_srt_SegmentGeographicalDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExchangeDifferencesOnTranslationAbstract_018db3b1-9087-4d01-b0f5-92035cbbeca9_terseLabel_en-US" xlink:label="lab_ifrs-full_ExchangeDifferencesOnTranslationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency translation adjustment</link:label>
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    <link:label id="lab_tac_RightOfUseAssetsTextBlock_487d7291-0882-49c4-872e-0ee5b7f6fa1e_terseLabel_en-US" xlink:label="lab_tac_RightOfUseAssetsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right of Use Assets</link:label>
    <link:label id="lab_tac_RightOfUseAssetsTextBlock_label_en-US" xlink:label="lab_tac_RightOfUseAssetsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right Of Use Assets [Text Block]</link:label>
    <link:label id="lab_tac_RightOfUseAssetsTextBlock_documentation_en-US" xlink:label="lab_tac_RightOfUseAssetsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right Of Use Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RightOfUseAssetsTextBlock" xlink:href="tac-20191231.xsd#tac_RightOfUseAssetsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RightOfUseAssetsTextBlock" xlink:to="lab_tac_RightOfUseAssetsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefund_2acfaceb-354e-4810-9ea0-cf6e80463f56_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefund" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash income taxes paid</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefund_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefund" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes paid (refund)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxesPaidRefund" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncomeTaxesPaidRefund"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeTaxesPaidRefund" xlink:to="lab_ifrs-full_IncomeTaxesPaidRefund" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetainedEarningsMember_d41f589f-9b48-4dcf-b905-fa9b02099bd4_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deficit</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInDerivativeBasisRelationshipPercent_d688969f-0863-4682-b77f-288fa3301fab_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeBasisRelationshipPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basis relationship, percent</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInDerivativeBasisRelationshipPercent_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeBasisRelationshipPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Basis Relationship, Percent</link:label>
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    <link:label id="lab_tac_Customer2Member_1cc75b95-47a3-476d-908a-8c3759fa09ca_terseLabel_en-US" xlink:label="lab_tac_Customer2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer 2</link:label>
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    <link:label id="lab_tac_Customer2Member_documentation_en-US" xlink:label="lab_tac_Customer2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer 2 [Member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_444f33cd-74c6-44b0-ac3a-be327957bf91_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
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    <link:label id="lab_tac_CreditFacilityCancelledIn2017Member_496ba9b7-fa76-4479-94a5-75ec9e361922_terseLabel_en-US" xlink:label="lab_tac_CreditFacilityCancelledIn2017Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility Cancelled In 2017 [Member]</link:label>
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    <link:label id="lab_tac_TidewaterMidstreamandInfrastructureLtdMember_a45c2b6d-5adf-4c8e-be35-9b85cede7ef8_terseLabel_en-US" xlink:label="lab_tac_TidewaterMidstreamandInfrastructureLtdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tidewater</link:label>
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    <link:label id="lab_ifrs-full_FinanceIncomeOnNetInvestmentInFinanceLease_d88e5446-3a41-427f-ba4e-ee9514cca38a_terseLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncomeOnNetInvestmentInFinanceLease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease income</link:label>
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    <link:label id="lab_ifrs-full_DebtInstrumentsHeld_783f36f7-62bd-4c13-bba0-262bc3e1b460_terseLabel_en-US" xlink:label="lab_ifrs-full_DebtInstrumentsHeld" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instruments held</link:label>
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    <link:label id="lab_tac_PowerPurchaseArrangementMember_c8bde670-3547-4a4a-a1d4-3ba12b26f34b_terseLabel_en-US" xlink:label="lab_tac_PowerPurchaseArrangementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power Purchase Arrangement</link:label>
    <link:label id="lab_tac_PowerPurchaseArrangementMember_label_en-US" xlink:label="lab_tac_PowerPurchaseArrangementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power Purchase Arrangement [Member]</link:label>
    <link:label id="lab_tac_PowerPurchaseArrangementMember_documentation_en-US" xlink:label="lab_tac_PowerPurchaseArrangementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power Purchase Arrangement [Member]</link:label>
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    <link:label id="lab_tac_Increasedecreaseinhedginginstrumentsassets_38ddd1b9-9e64-4f02-b3d2-e5b375f15d99_negatedTerseLabel_en-US" xlink:label="lab_tac_Increasedecreaseinhedginginstrumentsassets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in hedging instruments, liabilities</link:label>
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    <link:label id="lab_tac_Increasedecreaseinhedginginstrumentsassets_documentation_en-US" xlink:label="lab_tac_Increasedecreaseinhedginginstrumentsassets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in hedging instruments, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Increasedecreaseinhedginginstrumentsassets" xlink:href="tac-20191231.xsd#tac_Increasedecreaseinhedginginstrumentsassets"/>
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    <link:label id="lab_tac_NoncurrentFinancialLiabilitiesMember_822694b5-c8f1-4f66-b36c-131be73b6405_terseLabel_en-US" xlink:label="lab_tac_NoncurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term</link:label>
    <link:label id="lab_tac_NoncurrentFinancialLiabilitiesMember_4072b0aa-f0ce-4406-93ad-4396c561236c_verboseLabel_en-US" xlink:label="lab_tac_NoncurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term financial liabilities</link:label>
    <link:label id="lab_tac_NoncurrentFinancialLiabilitiesMember_label_en-US" xlink:label="lab_tac_NoncurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncurrent Financial Liabilities [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_NoncurrentFinancialLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_NoncurrentFinancialLiabilitiesMember"/>
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    <link:label id="lab_tac_DisclosureOfExpensesClassifiedByNatureTableTextBlock_a2828253-a3b6-4490-9bb8-00083e8deafe_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfExpensesClassifiedByNatureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expenses classified by nature</link:label>
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    <link:label id="lab_tac_FuelAndPurchasedPowerMember_281e9d4a-22ca-4942-9efd-ee4568a772e1_terseLabel_en-US" xlink:label="lab_tac_FuelAndPurchasedPowerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fuel and purchased power</link:label>
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    <link:label id="lab_tac_DisclosureofrevenuefromcontractswithcustomersAbstract_590c44fc-2bfa-4e80-904c-5b3a55bf06ba_terseLabel_en-US" xlink:label="lab_tac_DisclosureofrevenuefromcontractswithcustomersAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of revenue from contracts with customers [Abstract]</link:label>
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    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5be0687f-3e40-4f7b-b4a7-c369a8005b36_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember_eae17f13-74fe-49a0-8765-56b7dce486ce_terseLabel_en-US" xlink:label="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All Borrowings Except Finance Lease Obligations [Member]</link:label>
    <link:label id="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember_label_en-US" xlink:label="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All Borrowings Except Finance Lease Obligations [Member]</link:label>
    <link:label id="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember_documentation_en-US" xlink:label="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All Borrowings Except Finance Lease Obligations [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:href="tac-20191231.xsd#tac_AllBorrowingsExceptFinanceLeaseObligationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:to="lab_tac_AllBorrowingsExceptFinanceLeaseObligationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherAdjustmentsForNoncashItems_b5f1f508-ac0b-4a54-bf58-ea2a55491c9f_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-cash items</link:label>
    <link:label id="lab_ifrs-full_OtherAdjustmentsForNoncashItems_label_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other adjustments for non-cash items</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherAdjustmentsForNoncashItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:to="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities_b7f75c7e-ed5b-4f83-ac6b-c53f44e432e9_negatedTerseLabel_en-US" xlink:label="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realized gains on financial instruments</link:label>
    <link:label id="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realised Gains (Losses) On Financial Instrument, Classified As Financing Activities</link:label>
    <link:label id="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities_documentation_en-US" xlink:label="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realised Gains (Losses) On Financial Instrument, Classified As Financing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:href="tac-20191231.xsd#tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:to="lab_tac_RealisedGainsLossesOnFinancialInstrumentClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory_6fe73301-d95b-49f3-a110-7b5fd2be250a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognised finance lease</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of finance lease and operating lease by lessor [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory" xlink:to="lab_ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TransfersToPayablesContractLiabilities_3601c8cc-18df-482e-b662-1bd9bc3d0a14_terseLabel_en-US" xlink:label="lab_tac_TransfersToPayablesContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract termination associated with the purchase of Keephills 3 (Note 4(D))</link:label>
    <link:label id="lab_tac_TransfersToPayablesContractLiabilities_label_en-US" xlink:label="lab_tac_TransfersToPayablesContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers To Payables, Contract Liabilities</link:label>
    <link:label id="lab_tac_TransfersToPayablesContractLiabilities_documentation_en-US" xlink:label="lab_tac_TransfersToPayablesContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers To Payables, Contract Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransfersToPayablesContractLiabilities" xlink:href="tac-20191231.xsd#tac_TransfersToPayablesContractLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransfersToPayablesContractLiabilities" xlink:to="lab_tac_TransfersToPayablesContractLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities_a07f10cc-97f4-4314-83dd-34855b598ff9_terseLabel_en-US" xlink:label="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in cash flow from (used in) operating activities</link:label>
    <link:label id="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities_label_en-US" xlink:label="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in cash flow from (used in) operating activities</link:label>
    <link:label id="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities_documentation_en-US" xlink:label="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in cash flow from (used in) operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:href="tac-20191231.xsd#tac_Increasedecreaseincashflowfromusedinoperatingactivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:to="lab_tac_Increasedecreaseincashflowfromusedinoperatingactivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets_149cd1f6-e8b1-4471-af01-266dc3043eed_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through foreign exchange and other movements, financial assets</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through foreign exchange and other movements, financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_5c53596b-8bf9-413e-9198-efe5919fb54e_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions to property, plant and equipment (Note 17 and 34)</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_b3f0fecf-4e54-40d6-9d6e-78cb7be78f90_terseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment expenditures</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_861edfa6-3924-4dff-a603-319c293422dc_verboseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment expenditures</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property, plant and equipment, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TransAltaGenerationPartnershipMember_0262b58d-ac9d-43be-a888-478007233bae_terseLabel_en-US" xlink:label="lab_tac_TransAltaGenerationPartnershipMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Generation Partnership [Member]</link:label>
    <link:label id="lab_tac_TransAltaGenerationPartnershipMember_label_en-US" xlink:label="lab_tac_TransAltaGenerationPartnershipMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Generation Partnership [Member]</link:label>
    <link:label id="lab_tac_TransAltaGenerationPartnershipMember_documentation_en-US" xlink:label="lab_tac_TransAltaGenerationPartnershipMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Generation Partnership [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransAltaGenerationPartnershipMember" xlink:href="tac-20191231.xsd#tac_TransAltaGenerationPartnershipMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransAltaGenerationPartnershipMember" xlink:to="lab_tac_TransAltaGenerationPartnershipMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets_924772be-e9f2-425c-8aec-8d9d67a2ee61_negatedLabel_en-US" xlink:label="lab_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers into Level 3 of fair value hierarchy, assets</link:label>
    <link:label id="lab_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets_label_en-US" xlink:label="lab_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers into Level 3 of fair value hierarchy, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets" xlink:to="lab_ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits_8801d8eb-4e41-4d20-8ed6-767d4a45fdd2_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Termination benefits</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, termination benefits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationTerminationBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_StructuredProductsEasternU.S.Member_d645d9b6-1ed6-4c32-bd2f-becd7c0da9c7_terseLabel_en-US" xlink:label="lab_tac_StructuredProductsEasternU.S.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Structured products &#8211; Eastern US</link:label>
    <link:label id="lab_tac_StructuredProductsEasternU.S.Member_label_en-US" xlink:label="lab_tac_StructuredProductsEasternU.S.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Structured Products - Eastern U.S. [Member]</link:label>
    <link:label id="lab_tac_StructuredProductsEasternU.S.Member_documentation_en-US" xlink:label="lab_tac_StructuredProductsEasternU.S.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Structured Products - Eastern U.S. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_StructuredProductsEasternU.S.Member" xlink:href="tac-20191231.xsd#tac_StructuredProductsEasternU.S.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_StructuredProductsEasternU.S.Member" xlink:to="lab_tac_StructuredProductsEasternU.S.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ClassBsharesMember_005d512f-25b8-49ce-b4c7-82f9d81d3053_terseLabel_en-US" xlink:label="lab_tac_ClassBsharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class B shares</link:label>
    <link:label id="lab_tac_ClassBsharesMember_label_en-US" xlink:label="lab_tac_ClassBsharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class B shares [Member]</link:label>
    <link:label id="lab_tac_ClassBsharesMember_documentation_en-US" xlink:label="lab_tac_ClassBsharesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class B shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ClassBsharesMember" xlink:href="tac-20191231.xsd#tac_ClassBsharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ClassBsharesMember" xlink:to="lab_tac_ClassBsharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PurchaseObligations1_7c7aa0c1-41c8-40e5-8b6e-43238c3af2fa_terseLabel_en-US" xlink:label="lab_tac_PurchaseObligations1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase obligations</link:label>
    <link:label id="lab_tac_PurchaseObligations1_label_en-US" xlink:label="lab_tac_PurchaseObligations1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligations1</link:label>
    <link:label id="lab_tac_PurchaseObligations1_documentation_en-US" xlink:label="lab_tac_PurchaseObligations1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligations1</link:label>
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    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour_680f9150-2eb3-4f42-82ee-b2e3a47c90b6_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount sold</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour_label_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold, Emissions Per Hour</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold, Emissions Per Hour</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:to="lab_tac_DerivativeNonmonetaryNotionalAmountSoldEmissionsPerHour" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FinancialLiabilities1Member_96d852e9-cdb8-4284-bb27-4f503cf5bc31_terseLabel_en-US" xlink:label="lab_tac_FinancialLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Liabilities</link:label>
    <link:label id="lab_tac_FinancialLiabilities1Member_label_en-US" xlink:label="lab_tac_FinancialLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Liabilities1 [Member]</link:label>
    <link:label id="lab_tac_FinancialLiabilities1Member_documentation_en-US" xlink:label="lab_tac_FinancialLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Liabilities1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FinancialLiabilities1Member" xlink:href="tac-20191231.xsd#tac_FinancialLiabilities1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FinancialLiabilities1Member" xlink:to="lab_tac_FinancialLiabilities1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_ec2ad6ef-425e-4007-ab7f-1c8050021bfd_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) investing activities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GenerationSegmentsMember_33725a3b-e986-450a-9684-513723c7356d_terseLabel_en-US" xlink:label="lab_tac_GenerationSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generation Segments [Member]</link:label>
    <link:label id="lab_tac_GenerationSegmentsMember_label_en-US" xlink:label="lab_tac_GenerationSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generation Segments [Member]</link:label>
    <link:label id="lab_tac_GenerationSegmentsMember_documentation_en-US" xlink:label="lab_tac_GenerationSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Generation Segments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GenerationSegmentsMember" xlink:href="tac-20191231.xsd#tac_GenerationSegmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GenerationSegmentsMember" xlink:to="lab_tac_GenerationSegmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OrdinarySharesMember_f9e32526-671d-44f7-8c40-825b0ea868a3_terseLabel_en-US" xlink:label="lab_ifrs-full_OrdinarySharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares</link:label>
    <link:label id="lab_ifrs-full_OrdinarySharesMember_label_en-US" xlink:label="lab_ifrs-full_OrdinarySharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OrdinarySharesMember" xlink:to="lab_ifrs-full_OrdinarySharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofcashflowstatementAbstract_dbfa7d3d-a8ee-44b0-9aca-c8dd23e78518_terseLabel_en-US" xlink:label="lab_tac_DisclosureofcashflowstatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of cash flow statement [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofcashflowstatementAbstract_label_en-US" xlink:label="lab_tac_DisclosureofcashflowstatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of cash flow statement [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofcashflowstatementAbstract_documentation_en-US" xlink:label="lab_tac_DisclosureofcashflowstatementAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of cash flow statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofcashflowstatementAbstract" xlink:href="tac-20191231.xsd#tac_DisclosureofcashflowstatementAbstract"/>
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    <link:label id="lab_ifrs-full_PercentageOfEntitysRevenue_dc1b5826-e4da-485b-855b-afa2ca5e13f3_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfEntitysRevenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of entity's revenue</link:label>
    <link:label id="lab_ifrs-full_PercentageOfEntitysRevenue_label_en-US" xlink:label="lab_ifrs-full_PercentageOfEntitysRevenue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of entity's revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfEntitysRevenue" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PercentageOfEntitysRevenue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PercentageOfEntitysRevenue" xlink:to="lab_ifrs-full_PercentageOfEntitysRevenue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_5e3c3201-e38f-45d4-a70b-a0f0cadc6863_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange loss</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_9d531664-ebd7-464d-a511-ba129cc134fb_verboseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange gain (loss)</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange gain (loss)</link:label>
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    <link:label id="lab_ifrs-full_CashFlowHedgesMember_c4b0b924-b043-40b1-974e-55e246710ff1_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowHedgesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedges</link:label>
    <link:label id="lab_ifrs-full_CashFlowHedgesMember_e602eebf-f213-43d4-a11c-235d161e667a_verboseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowHedgesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedges</link:label>
    <link:label id="lab_ifrs-full_CashFlowHedgesMember_label_en-US" xlink:label="lab_ifrs-full_CashFlowHedgesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedges [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowHedgesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowHedgesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowHedgesMember" xlink:to="lab_ifrs-full_CashFlowHedgesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_0d57ec73-dd6c-420e-aacb-b389a074a2c3_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Attributable to non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_a2d83367-1df4-43e1-add2-0ca6f6f73533_verboseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_label_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterestsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NoncontrollingInterestsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncontrollingInterestsMember" xlink:to="lab_ifrs-full_NoncontrollingInterestsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent_74814f84-fc23-41f4-935c-93c7b07a94c5_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-standard shape factors, percent</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent_label_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Non-Standard Shape Factors, Percent</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Non-Standard Shape Factors, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:to="lab_tac_IncreaseDecreaseInDerivativeNonStandardShapeFactorsPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AnalysisofincomeandexpensesTable_b23e6965-3096-407b-9859-115e30ef0807_terseLabel_en-US" xlink:label="lab_tac_AnalysisofincomeandexpensesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Analysis of income and expenses [Table]</link:label>
    <link:label id="lab_tac_AnalysisofincomeandexpensesTable_label_en-US" xlink:label="lab_tac_AnalysisofincomeandexpensesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Analysis of income and expenses [Table]</link:label>
    <link:label id="lab_tac_AnalysisofincomeandexpensesTable_documentation_en-US" xlink:label="lab_tac_AnalysisofincomeandexpensesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Analysis of income and expenses [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AnalysisofincomeandexpensesTable" xlink:href="tac-20191231.xsd#tac_AnalysisofincomeandexpensesTable"/>
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    <link:label id="lab_ifrs-full_StatementOfFinancialPositionAbstract_e62343c5-bf21-460e-a54d-54279cb879bb_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of financial position [abstract]</link:label>
    <link:label id="lab_ifrs-full_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of financial position [abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ExercisePriceRangeTwoMember_4500b489-af8d-47a3-a173-63b419038471_terseLabel_en-US" xlink:label="lab_tac_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">22.00 - 30.00</link:label>
    <link:label id="lab_tac_ExercisePriceRangeTwoMember_label_en-US" xlink:label="lab_tac_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
    <link:label id="lab_tac_ExercisePriceRangeTwoMember_documentation_en-US" xlink:label="lab_tac_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ExercisePriceRangeTwoMember" xlink:href="tac-20191231.xsd#tac_ExercisePriceRangeTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ExercisePriceRangeTwoMember" xlink:to="lab_tac_ExercisePriceRangeTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LeaseLiabilities_148ca4c6-ee6d-41ff-b066-f0e81e8431e2_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liabilities</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LeaseLiabilities"/>
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    <link:label id="lab_tac_PreferenceSharesSeriesDMember_03783966-b563-40b6-98dc-37d3696b101e_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesSeriesDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series D</link:label>
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    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_2b1ca1a3-518e-47d9-ac7c-42e9037a9bfa_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options granted (in shares)</link:label>
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    <link:label id="lab_tac_CurrencySwapContract2Member_fd0c2ddb-d00e-4f6e-b660-ff563afe3044_terseLabel_en-US" xlink:label="lab_tac_CurrencySwapContract2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cross-Currency Swaps - foreign-denominated debt 2</link:label>
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    <link:label id="lab_ifrs-full_Level2OfFairValueHierarchyMember_a001f5f7-945a-4abb-97b4-7db2435754da_verboseLabel_en-US" xlink:label="lab_ifrs-full_Level2OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level II</link:label>
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    <link:label id="lab_tac_SensitivityAnalysisInDerivativeImpliedVolatilityPercent_4acb7858-352b-428b-b045-6e93651daf14_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativeImpliedVolatilityPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis In Derivative, Implied Volatility, Percent</link:label>
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    <link:label id="lab_tac_ContingentLiabilitiesMaximumExposure_be64646d-7b48-48d4-aa4b-f21f5286d646_terseLabel_en-US" xlink:label="lab_tac_ContingentLiabilitiesMaximumExposure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated financial effect of contingent liabilities</link:label>
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    <link:label id="lab_tac_ContingentLiabilitiesMaximumExposure_documentation_en-US" xlink:label="lab_tac_ContingentLiabilitiesMaximumExposure" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent Liabilities, Maximum Exposure</link:label>
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    <link:label id="lab_tac_RevenueMember_63561c96-711c-4ac4-b5ce-ef89a345c956_terseLabel_en-US" xlink:label="lab_tac_RevenueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
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    <link:label id="lab_ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome_0a106983-609b-4f7e-b34d-d41d342e0d0f_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net actuarial gains (losses)</link:label>
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    <link:label id="lab_ifrs-full_CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets_306d146c-b07e-45b9-99b8-6369867aa286_terseLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Money market and cash and cash equivalents</link:label>
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    <link:label id="lab_tac_SecuredbyequityinterestsoftheissuerMember_2f9c4e2f-5fb7-4467-adda-5b454cd11d87_terseLabel_en-US" xlink:label="lab_tac_SecuredbyequityinterestsoftheissuerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured by equity interests of the issuer</link:label>
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    <link:label id="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember_8052911f-fd88-4dd4-8d30-bbe19d6628ef_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">1% increase in the salary scale</link:label>
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    <link:label id="lab_ifrs-full_LiabilitiesAbstract_afd4512a-d5bb-4284-8969-2da8a6dc5662_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities [abstract]</link:label>
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    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption_615d3857-8cb2-4a4c-bb51-c90a3dd83d9e_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible decrease in actuarial assumption</link:label>
    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption_label_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible decrease in actuarial assumption</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption" xlink:to="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Contractexpensesandterminationcharges_07b25a14-ade7-48a5-a3c1-adf68762a95b_terseLabel_en-US" xlink:label="lab_tac_Contractexpensesandterminationcharges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract expenses and termination charges</link:label>
    <link:label id="lab_tac_Contractexpensesandterminationcharges_label_en-US" xlink:label="lab_tac_Contractexpensesandterminationcharges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract expenses and termination charges</link:label>
    <link:label id="lab_tac_Contractexpensesandterminationcharges_documentation_en-US" xlink:label="lab_tac_Contractexpensesandterminationcharges" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract expenses and termination charges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Contractexpensesandterminationcharges" xlink:href="tac-20191231.xsd#tac_Contractexpensesandterminationcharges"/>
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    <link:label id="lab_tac_IncreaseDecreaseInFinanceLeaseObligation_26388b6b-7c4d-4743-b051-6e7693fd93c1_negatedTerseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease in finance lease obligations (Note 22)</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInFinanceLeaseObligation_label_en-US" xlink:label="lab_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Finance Lease Obligation</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInFinanceLeaseObligation_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Finance Lease Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInFinanceLeaseObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:to="lab_tac_IncreaseDecreaseInFinanceLeaseObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_a52892c6-32b1-4303-8eef-63e5606a5a26_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_c68a94fe-3dc6-41db-9a1c-21a9fc623fc6_periodStartLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_5cefd161-7afb-4bdf-9485-eed21b8c4475_periodEndLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceLeaseReceivables_89bcbc67-914b-4086-b634-8d4a7d76c09e_totalLabel_en-US" xlink:label="lab_ifrs-full_FinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total finance lease receivables</link:label>
    <link:label id="lab_ifrs-full_FinanceLeaseReceivables_label_en-US" xlink:label="lab_ifrs-full_FinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceLeaseReceivables" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinanceLeaseReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceLeaseReceivables" xlink:to="lab_ifrs-full_FinanceLeaseReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EffectOfTransitionToIFRSsMember_489b1b1b-13c0-4788-9e58-907ab551d1b3_terseLabel_en-US" xlink:label="lab_ifrs-full_EffectOfTransitionToIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of transition to IFRSs [member]</link:label>
    <link:label id="lab_ifrs-full_EffectOfTransitionToIFRSsMember_label_en-US" xlink:label="lab_ifrs-full_EffectOfTransitionToIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of transition to IFRSs [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EffectOfTransitionToIFRSsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EffectOfTransitionToIFRSsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EffectOfTransitionToIFRSsMember" xlink:to="lab_ifrs-full_EffectOfTransitionToIFRSsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_0570ccff-bd5e-49d1-a808-a4ae305e5bb8_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of temporary difference, unused tax losses and unused tax credits [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of temporary difference, unused tax losses and unused tax credits [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:to="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ForeignExchangeGainMember_603a3792-6489-44df-8d9f-1d37151da327_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeGainMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange (gain) loss</link:label>
    <link:label id="lab_tac_ForeignExchangeGainMember_label_en-US" xlink:label="lab_tac_ForeignExchangeGainMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Gain [Member]</link:label>
    <link:label id="lab_tac_ForeignExchangeGainMember_documentation_en-US" xlink:label="lab_tac_ForeignExchangeGainMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Gain [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ForeignExchangeGainMember" xlink:href="tac-20191231.xsd#tac_ForeignExchangeGainMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ForeignExchangeGainMember" xlink:to="lab_tac_ForeignExchangeGainMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrencyRiskMember_4c794fff-3bdc-4495-be91-06d8fbea5559_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrencyRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency risk</link:label>
    <link:label id="lab_ifrs-full_CurrencyRiskMember_label_en-US" xlink:label="lab_ifrs-full_CurrencyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency risk [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrencyRiskMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrencyRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrencyRiskMember" xlink:to="lab_ifrs-full_CurrencyRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax_c7e4831a-b5ff-4398-b1d9-2736530ed300_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on financial instruments designated as hedges of foreign operations, net of tax</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on hedges of net investments in foreign operations, net of tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:to="lab_ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_3bc37443-db86-4113-bfe2-b716891eaea5_terseLabel_en-US" xlink:label="lab_ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset) [axis]</link:label>
    <link:label id="lab_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_label_en-US" xlink:label="lab_ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset) [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:to="lab_ifrs-full_NetDefinedBenefitLiabilityAssetAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible_3b20d324-2241-46eb-ad6c-a1900f5e55b5_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in derivative forward power prices, reasonable possible</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible_label_en-US" xlink:label="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Derivative Forward Power Prices, Reasonably Possible</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Derivative Forward Power Prices, Reasonably Possible</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:to="lab_tac_IncreaseDecreaseinDerivativeForwardPowerPricesReasonablyPossible" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems_1894b8ee-a064-4f98-805f-c28f148f2cd1_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of reconciliation of liabilities arising from financing activities [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of reconciliation of liabilities arising from financing activities [line items]</link:label>
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    <link:label id="lab_tac_Currency1Domain_cfae09d6-bbf5-49c6-b26b-f2e7220d0a39_terseLabel_en-US" xlink:label="lab_tac_Currency1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency1 [Domain]</link:label>
    <link:label id="lab_tac_Currency1Domain_label_en-US" xlink:label="lab_tac_Currency1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency1 [Domain]</link:label>
    <link:label id="lab_tac_Currency1Domain_documentation_en-US" xlink:label="lab_tac_Currency1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Currency1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Currency1Domain" xlink:href="tac-20191231.xsd#tac_Currency1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Currency1Domain" xlink:to="lab_tac_Currency1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_f007a91f-454e-4545-aec8-14f897fa57e0_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, share-based payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Adjustmentsfordecreaseincreaseininventory_c34091f2-b6b7-4dd2-8ebf-8e5445e0bf6a_terseLabel_en-US" xlink:label="lab_tac_Adjustmentsfordecreaseincreaseininventory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory</link:label>
    <link:label id="lab_tac_Adjustmentsfordecreaseincreaseininventory_label_en-US" xlink:label="lab_tac_Adjustmentsfordecreaseincreaseininventory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for decrease (increase) in inventory</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_Adjustmentsfordecreaseincreaseininventory" xlink:href="tac-20191231.xsd#tac_Adjustmentsfordecreaseincreaseininventory"/>
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    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_961f2fa9-412e-445b-ab7c-cff7895a0de3_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions other than through business combinations, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseInNonCashWorkingCapital_120fac40-3b43-4256-9f00-447c8cbf1b41_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInNonCashWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in non cash working capital</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInNonCashWorkingCapital_label_en-US" xlink:label="lab_tac_IncreaseDecreaseInNonCashWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Non Cash Working Capital</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInNonCashWorkingCapital_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInNonCashWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Non Cash Working Capital</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInNonCashWorkingCapital" xlink:to="lab_tac_IncreaseDecreaseInNonCashWorkingCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_c700537e-81d4-4c92-92f0-2028db638c1d_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term employee benefits</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, short-term employee benefits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExplanationOfDifferenceBetweenOperatingLeaseCommitmentsDisclosedApplyingIAS17AndLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16Explanatory_8ab17c53-834c-4ea0-991e-943ca7026ebc_terseLabel_en-US" xlink:label="lab_ifrs-full_ExplanationOfDifferenceBetweenOperatingLeaseCommitmentsDisclosedApplyingIAS17AndLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16Explanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of operating lease liabilities at date of initial application of IFRS 16</link:label>
    <link:label id="lab_ifrs-full_ExplanationOfDifferenceBetweenOperatingLeaseCommitmentsDisclosedApplyingIAS17AndLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16Explanatory_label_en-US" xlink:label="lab_ifrs-full_ExplanationOfDifferenceBetweenOperatingLeaseCommitmentsDisclosedApplyingIAS17AndLeaseLiabilitiesRecognisedAtDateOfInitialApplicationOfIFRS16Explanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Explanation of difference between operating lease commitments disclosed applying IAS 17 and lease liabilities recognised at date of initial application of IFRS 16 [text block]</link:label>
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    <link:label id="lab_ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_188a961c-43b7-44a8-82ac-1d70df39c6a5_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromEquitysettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets</link:label>
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    <link:label id="lab_tac_Employee1Member_786ac289-4774-45f7-a4bb-cf29c914e38c_terseLabel_en-US" xlink:label="lab_tac_Employee1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-executive employees</link:label>
    <link:label id="lab_tac_Employee1Member_label_en-US" xlink:label="lab_tac_Employee1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee1 [Member]</link:label>
    <link:label id="lab_tac_Employee1Member_documentation_en-US" xlink:label="lab_tac_Employee1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Employee1Member" xlink:href="tac-20191231.xsd#tac_Employee1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Employee1Member" xlink:to="lab_tac_Employee1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssuedCapital_6c0b152a-9fd1-4952-b2c0-b870f1f94ee2_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital (Note 24)</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_9e508071-eacd-4c35-8c1e-8fc806eea33d_periodStartLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued and outstanding, end of year</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_660179c0-5796-42e8-82b3-0504f9567f23_periodEndLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued and outstanding, end of year</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_ef791831-6b2b-4257-99e0-34ca99bb59eb_verboseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital (Note 25)</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_label_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IssuedCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapital" xlink:to="lab_ifrs-full_IssuedCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_8f932161-a0a5-4465-8e0c-df7e45ebb4dc_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee future benefits</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for employee benefits [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_StockIssuedDuringPeriodValueNewIssues1_ce9cf833-0e04-4d08-9267-19bf1c86555b_terseLabel_en-US" xlink:label="lab_tac_StockIssuedDuringPeriodValueNewIssues1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares purchased under NCIB</link:label>
    <link:label id="lab_tac_StockIssuedDuringPeriodValueNewIssues1_label_en-US" xlink:label="lab_tac_StockIssuedDuringPeriodValueNewIssues1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, New Issues1</link:label>
    <link:label id="lab_tac_StockIssuedDuringPeriodValueNewIssues1_documentation_en-US" xlink:label="lab_tac_StockIssuedDuringPeriodValueNewIssues1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, New Issues1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_StockIssuedDuringPeriodValueNewIssues1" xlink:href="tac-20191231.xsd#tac_StockIssuedDuringPeriodValueNewIssues1"/>
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    <link:label id="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest_676ede9f-c075-4113-88f3-628ddd45545d_totalLabel_en-US" xlink:label="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted earnings before income taxes</link:label>
    <link:label id="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest_label_en-US" xlink:label="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (Loss) Before Tax, Adjusted For Non-Taxable Income, Non-controlling Interest</link:label>
    <link:label id="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest_documentation_en-US" xlink:label="lab_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (Loss) Before Tax, Adjusted For Non-Taxable Income, Non-controlling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest" xlink:href="tac-20191231.xsd#tac_ProfitLossBeforeTaxAdjustedForNonTaxableIncomeNoncontrollingInterest"/>
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    <link:label id="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement_31b4552a-1458-425d-9bf3-e46caed7d534_terseLabel_en-US" xlink:label="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balancing pool compensation estimate, termination of contractual arrangement</link:label>
    <link:label id="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement_label_en-US" xlink:label="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Compensation Estimate, Termination of Contractual Arrangement</link:label>
    <link:label id="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement_documentation_en-US" xlink:label="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Compensation Estimate, Termination of Contractual Arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:href="tac-20191231.xsd#tac_CounterpartyCompensationEstimateTerminationofContractualArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:to="lab_tac_CounterpartyCompensationEstimateTerminationofContractualArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory_48062b32-dda4-474c-955f-b87c439c03f2_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate Information</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNotesAndOtherExplanatoryInformationExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of notes and other explanatory information [text block]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems_306660e6-7c0a-4ef5-9390-46dced2761f7_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [line items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="lab_ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory_e5b6f222-314a-4fb3-84f6-13cd252eb92e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [text block]</link:label>
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    <link:label id="lab_tac_EmployeeBenefitsAndCompensationPlansTemporaryDifferencesMember_d58eaf71-98af-4339-ab2e-511b56d71730_terseLabel_en-US" xlink:label="lab_tac_EmployeeBenefitsAndCompensationPlansTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee future benefits and compensation plans</link:label>
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    <link:label id="lab_ifrs-full_FinancialLiabilitiesCategoryMember_ee995755-eff3-450c-8a22-fb0fcacca6dd_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesCategoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, category [member]</link:label>
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    <link:label id="lab_tac_NoncurrentDeferredServiceCosts_e51b2ac7-147b-406c-a782-57e526a22cb9_terseLabel_en-US" xlink:label="lab_tac_NoncurrentDeferredServiceCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred service costs</link:label>
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    <link:label id="lab_tac_NoncurrentDeferredServiceCosts_documentation_en-US" xlink:label="lab_tac_NoncurrentDeferredServiceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current Deferred Service Costs</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfCashFlowStatementExplanatory_46c3e4a2-a569-4969-9430-bfc8290175fd_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfCashFlowStatementExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of cash flow statement</link:label>
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    <link:label id="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_efdff41f-2e91-4b95-a142-3815eef7b1e5_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of financial liabilities [axis]</link:label>
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    <link:label id="lab_tac_PreferenceSharesSeriesHMember_592ebf68-8686-44c1-a0b8-48324ba6cf7a_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesSeriesHMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series H</link:label>
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    <link:label id="lab_tac_PreferenceSharesSeriesHMember_documentation_en-US" xlink:label="lab_tac_PreferenceSharesSeriesHMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series H [Member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfComparativeInformationPreparedUnderPreviousGAAPLineItems_309c180d-253e-4352-b9c1-2e593a4050b3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfComparativeInformationPreparedUnderPreviousGAAPLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of comparative information prepared under previous GAAP [line items]</link:label>
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    <link:label id="lab_tac_ExchangeableSecuritiesMember_11d98300-b71b-448c-8e5c-9de54a941960_terseLabel_en-US" xlink:label="lab_tac_ExchangeableSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchangeable securities</link:label>
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    <link:label id="lab_srt_NaturalGasReservesMember_c06a8dee-366e-4546-92ce-828c6dd8aa77_terseLabel_en-US" xlink:label="lab_srt_NaturalGasReservesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural gas</link:label>
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    <link:label id="lab_invest_InvestmentDomain_7c881a4e-90d5-46f4-8d0e-ce33347f9e4a_terseLabel_en-US" xlink:label="lab_invest_InvestmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Domain]</link:label>
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    <link:label id="lab_ifrs-full_CurrentDividendPayables_5a7e00c2-1926-4799-8928-5f0f452216f6_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentDividendPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends payable (Note 24 and 25)</link:label>
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    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities_f8aee0bb-4f7c-453c-9ecc-091a9dafb829_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_tac_ProportionOfEquityParticipationInSubsidiary_3d018964-d225-49e8-bc1b-2d80b29a87ce_terseLabel_en-US" xlink:label="lab_tac_ProportionOfEquityParticipationInSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of equity participation in subsidiary</link:label>
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    <link:label id="lab_ifrs-full_MiscellaneousEquityAbstract_f6ee9d37-9480-4046-b7a1-fba63427a74c_terseLabel_en-US" xlink:label="lab_ifrs-full_MiscellaneousEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components and changes in accumulated other comprehensive Income (loss)</link:label>
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    <link:label id="lab_tac_DisclosureOfDividendsDeclaredOnPreferenceSharesTableTextBlock_a63b29b3-1883-408d-83d3-ee032e1ec86e_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfDividendsDeclaredOnPreferenceSharesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Dividends Declared On Preference Shares [Table Text Block]</link:label>
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    <link:label id="lab_ifrs-full_RecognisedFinanceLeaseAsAssets_09c2ad7f-4696-4928-ae29-ab6e44188213_terseLabel_en-US" xlink:label="lab_ifrs-full_RecognisedFinanceLeaseAsAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets under finance leases</link:label>
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    <link:label id="lab_tac_IncomeTaxesAbstract_6a0d9346-d66a-411d-89fd-f2bb70a50d59_terseLabel_en-US" xlink:label="lab_tac_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Taxes [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_OtherIntangibleAssetsMember_1d55bdb4-05bf-4fb3-8428-7e8e4c2077e5_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherIntangibleAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power sale contracts</link:label>
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    <link:label id="lab_tac_GasGenerationMember_17d9b614-33f9-4e83-bb08-cd339837dd39_terseLabel_en-US" xlink:label="lab_tac_GasGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gas generation</link:label>
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    <link:label id="lab_tac_LitigationSettlementAmountAwardedFromOtherParty1_1fe2f60e-0944-4de6-a17b-1a830976fb96_terseLabel_en-US" xlink:label="lab_tac_LitigationSettlementAmountAwardedFromOtherParty1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Litigation settlement, amount awarded from other party</link:label>
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    <link:label id="lab_tac_NonhedgingInstrumentsMember_ea15b185-8c8f-4478-9a8f-60deb5af3e65_terseLabel_en-US" xlink:label="lab_tac_NonhedgingInstrumentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not designated as a hedge</link:label>
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    <link:label id="lab_ifrs-full_InterestExpenseOnRepurchaseAgreementsAndCashCollateralOnSecuritiesLent_796aae7c-34c0-416e-9fc8-f61366100e7d_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnRepurchaseAgreementsAndCashCollateralOnSecuritiesLent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest on exchangeable securities</link:label>
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    <link:label id="lab_ifrs-full_LevelsOfFairValueHierarchyAxis_b4e6ff31-8e9f-467c-8034-664bab1fcdfc_terseLabel_en-US" xlink:label="lab_ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Levels of fair value hierarchy [axis]</link:label>
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    <link:label id="lab_tac_DescriptionOfAccountingPolicyForSignificantAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyPolicyTextBlock_36561b46-c2ad-409a-b11f-45a01c63466a_terseLabel_en-US" xlink:label="lab_tac_DescriptionOfAccountingPolicyForSignificantAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant accounting judgments and key sources of estimation uncertainty</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesExplanatory_062f2ec4-f265-4858-ba95-8adc97979ccf_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of liabilities</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory_748e6293-c281-4e22-971d-27e6cbb68e76_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments</link:label>
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    <link:label id="lab_tac_SoderglenMember_ae1312cd-0c15-4e48-ac90-122782d28199_terseLabel_en-US" xlink:label="lab_tac_SoderglenMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Soderglen</link:label>
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    <link:label id="lab_ifrs-full_MaturityAxis_4034bf66-71e4-4f5e-9b69-567c222ba653_terseLabel_en-US" xlink:label="lab_ifrs-full_MaturityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maturity [axis]</link:label>
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    <link:label id="lab_ifrs-full_MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease_8326db7c-b367-4491-be1a-c93d5171afe9_terseLabel_en-US" xlink:label="lab_ifrs-full_MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cancellable operating leases</link:label>
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    <link:label id="lab_ifrs-full_MajorCustomersMember_3c565855-399d-42ca-a5c4-0fb8c0591f3e_terseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customers [member]</link:label>
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    <link:label id="lab_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract_1a674e76-f4e1-455f-97fd-0da69e780008_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in intangible assets other than goodwill [abstract]</link:label>
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    <link:label id="lab_tac_NumberOfReportableSegments1_68b29785-e023-45d4-9802-3db4b8bb39e3_terseLabel_en-US" xlink:label="lab_tac_NumberOfReportableSegments1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of segments</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_NumberOfReportableSegments1" xlink:href="tac-20191231.xsd#tac_NumberOfReportableSegments1"/>
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    <link:label id="lab_tac_DisclosureofentitysoperatingsegmentsAbstract_ee1a27d0-02ea-4778-a0d7-2ebe82f679d2_terseLabel_en-US" xlink:label="lab_tac_DisclosureofentitysoperatingsegmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of entity's operating segments [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits_008a8fc3-1e6e-425b-8d84-e6d7f80ba7af_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Post-employment benefits</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory_beb0e2f5-b211-4ac8-82eb-50879b861152_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in subsidiaries</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfProvisionsAxis_c476ae09-440a-4fbd-a4ee-17d69517aa92_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfProvisionsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of other provisions [axis]</link:label>
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    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensation_3cef807a-8130-4c1e-9c5f-08c3d0542e18_totalLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensation" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total compensation</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensation_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments_65cb7dd0-f267-422f-9df8-4cae23d11178_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through conversion of convertible instruments, equity</link:label>
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    <link:label id="lab_dei_DocumentFiscalYearFocus_4e73178d-2858-4b9d-9034-46738945414e_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_e9655738-feaa-47d0-8899-c8dc57911ffc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [line items]</link:label>
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    <link:label id="lab_tac_BBBRatingMember_35ade0eb-d4c4-442b-8791-d7011e97aa09_terseLabel_en-US" xlink:label="lab_tac_BBBRatingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">BBB</link:label>
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    <link:label id="lab_tac_PropertyPlantsAndEquipmentMember_a5154036-2c58-4382-9fe2-7fc59951e88b_terseLabel_en-US" xlink:label="lab_tac_PropertyPlantsAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
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    <link:label id="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_ced2b138-5db5-416d-93c0-4ca53c9d88fd_terseLabel_en-US" xlink:label="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisitions</link:label>
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    <link:label id="lab_ifrs-full_ReserveOfCashFlowHedges_129bf1fe-9021-49d2-8427-23ecda0fbc7f_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfCashFlowHedges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reserve of cash flow hedges</link:label>
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    <link:label id="lab_tac_ForeignExchangeTemporaryDifferencesMember_9b06ae28-6886-45ce-bd08-ed41669d88eb_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange differences on US-denominated debt</link:label>
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    <link:label id="lab_tac_ForeignExchangeTemporaryDifferencesMember_documentation_en-US" xlink:label="lab_tac_ForeignExchangeTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Temporary Differences [Member]</link:label>
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    <link:label id="lab_tac_AnnualDividendPerShare_d0ee0d60-fd24-45db-ad45-e37880b31f01_terseLabel_en-US" xlink:label="lab_tac_AnnualDividendPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Annual dividend per share</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsAbstract_c4c2b65f-de8b-421e-be58-92b10c8ab229_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about financial instruments [abstract]</link:label>
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    <link:label id="lab_srt_RangeMember_3af2754c-c120-48e8-9e5d-1ba91d79ac4e_terseLabel_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range [Domain]</link:label>
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    <link:label id="lab_tac_Increasedecreaseinissuedcapital_2d7118c9-ec05-4dc8-8836-46d05e29ac13_terseLabel_en-US" xlink:label="lab_tac_Increasedecreaseinissuedcapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in issued capital</link:label>
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    <link:label id="lab_tac_Increasedecreaseinissuedcapital_documentation_en-US" xlink:label="lab_tac_Increasedecreaseinissuedcapital" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in issued capital</link:label>
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    <link:label id="lab_ifrs-full_GainsOnDisposalsOfInvestments_124213a1-12f1-4f5e-9982-09d8e558225b_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_GainsOnDisposalsOfInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on termination of Keephills 3 coal rights contract</link:label>
    <link:label id="lab_ifrs-full_GainsOnDisposalsOfInvestments_6231b83a-3293-41b6-9168-ded51221907a_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsOnDisposalsOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on disposals of investments</link:label>
    <link:label id="lab_ifrs-full_GainsOnDisposalsOfInvestments_label_en-US" xlink:label="lab_ifrs-full_GainsOnDisposalsOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains on disposals of investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsOnDisposalsOfInvestments" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainsOnDisposalsOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsOnDisposalsOfInvestments" xlink:to="lab_ifrs-full_GainsOnDisposalsOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentNaturalGas_7a0b62bd-592b-4f24-bff7-bb4d30d7715a_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentNaturalGas" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural gas</link:label>
    <link:label id="lab_ifrs-full_CurrentNaturalGas_label_en-US" xlink:label="lab_ifrs-full_CurrentNaturalGas" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current natural gas</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentNaturalGas" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentNaturalGas"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentNaturalGas" xlink:to="lab_ifrs-full_CurrentNaturalGas" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfMajorCustomersTable_ac0855a1-9e40-484a-9ef9-9f0e3c716a51_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMajorCustomersTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of major customers [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfMajorCustomersTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfMajorCustomersTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of major customers [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfMajorCustomersTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfMajorCustomersTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfMajorCustomersTable" xlink:to="lab_ifrs-full_DisclosureOfMajorCustomersTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProductionSupplies_42b38786-01f6-4e3c-be5d-deb714e5b418_terseLabel_en-US" xlink:label="lab_ifrs-full_ProductionSupplies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Parts and materials</link:label>
    <link:label id="lab_ifrs-full_ProductionSupplies_label_en-US" xlink:label="lab_ifrs-full_ProductionSupplies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current production supplies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductionSupplies" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProductionSupplies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProductionSupplies" xlink:to="lab_ifrs-full_ProductionSupplies" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfRisksMember_afe44dc7-c227-40cc-aa73-a046791c439a_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks [member]</link:label>
    <link:label id="lab_ifrs-full_TypesOfRisksMember_label_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfRisksMember" xlink:to="lab_ifrs-full_TypesOfRisksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset_0aa60ca4-07f0-4ed2-ad8c-f238f80c0ec0_negatedLabel_en-US" xlink:label="lab_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net actuarial gains (losses) on defined benefit plans, net of tax</link:label>
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    <link:label id="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_ba6bbf7c-1739-4bbd-b3b4-1df4dda93382_terseLabel_en-US" xlink:label="lab_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition</link:label>
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    <link:label id="lab_tac_Sharesofferedforconversion_c37cd8e4-5f51-4ea2-990d-ece103ebd26d_terseLabel_en-US" xlink:label="lab_tac_Sharesofferedforconversion" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares offered for conversion</link:label>
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    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis_d589de45-6fdf-45f6-8582-0dce01a23c62_terseLabel_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options [axis]</link:label>
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    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesExpiringIn2020Member_ee379bb9-baa3-4208-b598-59ad1a7ef0c6_terseLabel_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesExpiringIn2020Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed bilateral credit facilities expiring in 2020</link:label>
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    <link:label id="lab_tac_USWindProjectsAntrimMember_81dbae4f-93a1-42f9-87a7-b52dc6353d69_terseLabel_en-US" xlink:label="lab_tac_USWindProjectsAntrimMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US Wind Projects - Antrim</link:label>
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    <link:label id="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariable_a112d5d4-41e6-4ab9-abf4-ad74200b7683_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis, management assessment</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives_7656f67a-0856-4d70-9205-f32283cec2bd_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized (gain) loss from risk management activities</link:label>
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    <link:label id="lab_tac_StockOptionsMember_95fb58c9-7ffb-41eb-983e-bc69a380f00d_terseLabel_en-US" xlink:label="lab_tac_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Options</link:label>
    <link:label id="lab_tac_StockOptionsMember_label_en-US" xlink:label="lab_tac_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Options [Member]</link:label>
    <link:label id="lab_tac_StockOptionsMember_documentation_en-US" xlink:label="lab_tac_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Options [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_StockOptionsMember" xlink:href="tac-20191231.xsd#tac_StockOptionsMember"/>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_6f462dd2-50dc-492b-ae9d-b9cc7d4caf45_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases_2c09026c-7df3-4a4a-b603-6dabd48b71e4_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of compensation increase</link:label>
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    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsPrincipal_438a5471-e67d-40fa-a59b-4517cd8f4a02_terseLabel_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsPrincipal" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of unsecured debt, principal</link:label>
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    <link:label id="lab_ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities_eb357ac3-180f-4d96-a09e-3907fcde2712_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributions paid to subsidiaries' non-controlling interests (Note 12)</link:label>
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    <link:label id="lab_tac_CommodityPriceRiskGenerationMember_54dd776c-3c6e-42b8-a002-9ef1bc1270c6_terseLabel_en-US" xlink:label="lab_tac_CommodityPriceRiskGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Generation [Member]</link:label>
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    <link:label id="lab_tac_CommodityPriceRiskGenerationMember_documentation_en-US" xlink:label="lab_tac_CommodityPriceRiskGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Generation [Member]</link:label>
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    <link:label id="lab_tac_NetRiskManagementAssetsAndLiabilitiesTemporaryDifferencesMember_062040c9-6521-42e4-99bc-c94dfafab19e_terseLabel_en-US" xlink:label="lab_tac_NetRiskManagementAssetsAndLiabilitiesTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management assets and liabilities, net</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfInvestments_cdaf5f85-4d22-4a11-980f-1a42a6c546ad_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on disposals of investments</link:label>
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    <link:label id="lab_ifrs-full_ReversalOfImpairmentLoss_80dfef23-242f-4521-a9a3-0705caedad63_terseLabel_en-US" xlink:label="lab_ifrs-full_ReversalOfImpairmentLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of impairment loss</link:label>
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    <link:label id="lab_ifrs-full_ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts_77ecf04e-00ca-49eb-bc3a-71e6a58541f9_terseLabel_en-US" xlink:label="lab_ifrs-full_ShorttermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of decommissioning and other provisions (Note 21)</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsAbstract_7db3951e-afa2-4275-89e9-1798ce5bb9d8_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [abstract]</link:label>
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    <link:label id="lab_tac_PerformanceShareUnitPSUandRestrictedShareUnitRSUPlanMember_documentation_en-US" xlink:label="lab_tac_PerformanceShareUnitPSUandRestrictedShareUnitRSUPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Unit (&#8220;PSU&#8221;) and Restricted Share Unit (&#8220;RSU&#8221;) Plan [Member]</link:label>
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    <link:label id="lab_tac_PrivateMember_7794b411-44fa-4b17-a8dc-1a0ba3af71d2_terseLabel_en-US" xlink:label="lab_tac_PrivateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Private [Member]</link:label>
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    <link:label id="lab_tac_PrivateMember_documentation_en-US" xlink:label="lab_tac_PrivateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Private [Member]</link:label>
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    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParent_e481151a-7bdd-4527-b85a-734575ad232f_totalLabel_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity attributable to shareholders</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries_593f486b-f8ee-4596-8fa6-c14e4d1dd3e3_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromChangesInOwnershipInterestsInSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net proceeds on sale of non-controlling interest in subsidiary (Note 4)</link:label>
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    <link:label id="lab_ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities_b61dcac2-b490-4a61-8e51-51a7a425d9a2_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseThroughNewLeasesLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New leases</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory_916db2d6-1ca4-407d-bf36-7f44c2b0730e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of borrowings outstanding</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory_ca41efd2-e90d-41dc-91db-e94e5d999d01_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Project development costs</link:label>
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    <link:label id="lab_ifrs-full_LiabilitiesMember_2bd2c836-c438-465d-8a46-de49ebb91a39_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities [member]</link:label>
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    <link:label id="lab_tac_CapitalPowerMember_916c4931-07e8-4d42-84ae-bf85a2b53102_terseLabel_en-US" xlink:label="lab_tac_CapitalPowerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Power</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfMajorCustomersLineItems_0e305d63-600c-4b45-a54f-fa10b37a58ba_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMajorCustomersLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of major customers [line items]</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInInvestingWorkingCapital_057b6a6b-95b5-4133-b869-e7cf5421e580_negatedTerseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInInvestingWorkingCapital" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in non-cash investing working capital balances</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInInvestingWorkingCapital" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInInvestingWorkingCapital"/>
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    <link:label id="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_f9f4f030-6b1c-4ff0-bf37-bd391e55fa9e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of quantitative information about right-of-use assets [text block]</link:label>
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    <link:label id="lab_ifrs-full_InitiallyAppliedIFRSsMember_62b293fa-9e6f-4627-9056-966d1d4f8e5b_terseLabel_en-US" xlink:label="lab_ifrs-full_InitiallyAppliedIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Initially applied IFRSs [member]</link:label>
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    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_c4c63812-8e92-4228-9f92-f3085fb2cafd_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Compensation expense (reversal)</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from share-based payment transactions with employees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:to="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeNotionalAmountPurchased_d774e414-9bbc-45f6-9053-ff8edff89145_terseLabel_en-US" xlink:label="lab_tac_DerivativeNotionalAmountPurchased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Notional Amount Purchased</link:label>
    <link:label id="lab_tac_DerivativeNotionalAmountPurchased_label_en-US" xlink:label="lab_tac_DerivativeNotionalAmountPurchased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Notional Amount Purchased</link:label>
    <link:label id="lab_tac_DerivativeNotionalAmountPurchased_documentation_en-US" xlink:label="lab_tac_DerivativeNotionalAmountPurchased" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Notional Amount Purchased</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNotionalAmountPurchased" xlink:href="tac-20191231.xsd#tac_DerivativeNotionalAmountPurchased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeNotionalAmountPurchased" xlink:to="lab_tac_DerivativeNotionalAmountPurchased" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_USWindProjectsMember_6b5426f8-fe38-4630-8274-5d24c22e5132_terseLabel_en-US" xlink:label="lab_tac_USWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US Wind Projects</link:label>
    <link:label id="lab_tac_USWindProjectsMember_label_en-US" xlink:label="lab_tac_USWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US Wind Projects [Member]</link:label>
    <link:label id="lab_tac_USWindProjectsMember_documentation_en-US" xlink:label="lab_tac_USWindProjectsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US Wind Projects [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_USWindProjectsMember" xlink:href="tac-20191231.xsd#tac_USWindProjectsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_USWindProjectsMember" xlink:to="lab_tac_USWindProjectsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CollateralonDerivativeInstruments_7ecc4262-dd35-496a-b430-652028f0fd6a_terseLabel_en-US" xlink:label="lab_tac_CollateralonDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collateral posted on derivative liabilities</link:label>
    <link:label id="lab_tac_CollateralonDerivativeInstruments_label_en-US" xlink:label="lab_tac_CollateralonDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collateral on Derivative Instruments</link:label>
    <link:label id="lab_tac_CollateralonDerivativeInstruments_documentation_en-US" xlink:label="lab_tac_CollateralonDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collateral on Derivative Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CollateralonDerivativeInstruments" xlink:href="tac-20191231.xsd#tac_CollateralonDerivativeInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CollateralonDerivativeInstruments" xlink:to="lab_tac_CollateralonDerivativeInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_542364d8-1b63-4fc3-8550-9c7340e2a871_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on exchange differences on translation, before tax</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on exchange differences on translation, before tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:to="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NotesAndDebenturesIssued_db51b420-9a47-421d-b854-adb5929c3e28_terseLabel_en-US" xlink:label="lab_ifrs-full_NotesAndDebenturesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes and debentures issued</link:label>
    <link:label id="lab_ifrs-full_NotesAndDebenturesIssued_7e0393c5-e9dd-448f-9516-59b23109aea3_verboseLabel_en-US" xlink:label="lab_ifrs-full_NotesAndDebenturesIssued" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debentures issued</link:label>
    <link:label id="lab_ifrs-full_NotesAndDebenturesIssued_label_en-US" xlink:label="lab_ifrs-full_NotesAndDebenturesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes and debentures issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotesAndDebenturesIssued" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NotesAndDebenturesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NotesAndDebenturesIssued" xlink:to="lab_ifrs-full_NotesAndDebenturesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory_f92fb6ff-c262-4e87-b331-d8647a145538_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for transactions with non-controlling interests [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_cf0aadfa-58e2-43ac-ab23-f849176ad486_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals</link:label>
    <link:label id="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals, property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_4ea47c3b-5235-4f49-ae73-3cfcdb988d31_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares issued</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in number of shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseInNumberOfSharesOutstanding"/>
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    <link:label id="lab_ifrs-full_MajorCustomersAxis_4734a2af-0c2d-4c11-9e5a-0c0ba33a77e5_terseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Major customers [axis]</link:label>
    <link:label id="lab_ifrs-full_MajorCustomersAxis_label_en-US" xlink:label="lab_ifrs-full_MajorCustomersAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Major customers [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorCustomersAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_MajorCustomersAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MajorCustomersAxis" xlink:to="lab_ifrs-full_MajorCustomersAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate_3596e894-64de-4492-9cda-83c64d0b1849_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities recognised as of acquisition date</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities recognised as of acquisition date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:to="lab_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CreditRiskAllocationPercentage_17719af3-94da-45dd-9a9d-99a4b5e16bb2_terseLabel_en-US" xlink:label="lab_tac_CreditRiskAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit risk, allocation percentage</link:label>
    <link:label id="lab_tac_CreditRiskAllocationPercentage_label_en-US" xlink:label="lab_tac_CreditRiskAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Risk, Allocation Percentage</link:label>
    <link:label id="lab_tac_CreditRiskAllocationPercentage_documentation_en-US" xlink:label="lab_tac_CreditRiskAllocationPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Risk, Allocation Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CreditRiskAllocationPercentage" xlink:href="tac-20191231.xsd#tac_CreditRiskAllocationPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CreditRiskAllocationPercentage" xlink:to="lab_tac_CreditRiskAllocationPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests_fe5e0697-cc6a-4751-b257-4ef7ba45f46c_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interests held by non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests_6b68a559-8489-456d-8cca-7142faed4a0c_verboseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership and voting rights percentage</link:label>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interests held by non-controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:to="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnHedgingInstrument_8228d4ed-806b-4b85-bcf1-015b7bab148c_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnHedgingInstrument" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on cash flow hedges, before tax</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnHedgingInstrument_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnHedgingInstrument" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on hedging instrument, fair value hedges</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnHedgingInstrument" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainsLossesOnHedgingInstrument"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnHedgingInstrument" xlink:to="lab_ifrs-full_GainsLossesOnHedgingInstrument" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_ea376de8-e796-4fc6-8d58-4c48cde180a4_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current finance lease receivables</link:label>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_82ef5ce1-86c9-428b-a971-088600330073_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of finance lease receivables (Note 8)</link:label>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_label_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current finance lease receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentFinanceLeaseReceivables" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentFinanceLeaseReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentFinanceLeaseReceivables" xlink:to="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_MiningAssets_e0606057-14c2-42e3-9904-5f117b226d96_terseLabel_en-US" xlink:label="lab_ifrs-full_MiningAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mining assets</link:label>
    <link:label id="lab_ifrs-full_MiningAssets_label_en-US" xlink:label="lab_ifrs-full_MiningAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mining assets</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_CanadianCoalMember" xlink:href="tac-20191231.xsd#tac_CanadianCoalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CanadianCoalMember" xlink:to="lab_tac_CanadianCoalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HedgingAssetMember_1db5cb6a-ee3a-4f30-8a77-ade0c1824df5_terseLabel_en-US" xlink:label="lab_tac_HedgingAssetMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Asset</link:label>
    <link:label id="lab_tac_HedgingAssetMember_label_en-US" xlink:label="lab_tac_HedgingAssetMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Asset [Member]</link:label>
    <link:label id="lab_tac_HedgingAssetMember_documentation_en-US" xlink:label="lab_tac_HedgingAssetMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Asset [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HedgingAssetMember" xlink:href="tac-20191231.xsd#tac_HedgingAssetMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HedgingAssetMember" xlink:to="lab_tac_HedgingAssetMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour_6640f005-2d7a-4824-b9f0-2b81c7fd6008_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount purchased</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour_label_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Purchased Per Hour</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Purchased Per Hour</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:to="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedPerHour" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AssetsAbstract_ae6c6d24-45f1-450b-8f28-8cbb62c65126_terseLabel_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [abstract]</link:label>
    <link:label id="lab_ifrs-full_AssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AssetsAbstract" xlink:to="lab_ifrs-full_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable_ccf48a81-e753-4511-be69-84ae65325245_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment loss recognised or reversed [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment loss recognised or reversed for cash-generating unit [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfImpairmentLossRecognisedOrReversedTable"/>
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    <link:label id="lab_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts_95fd06f3-6011-4aba-a1c8-dd4bda2f65e6_terseLabel_en-US" xlink:label="lab_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decommissioning and other provisions</link:label>
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    <link:label id="lab_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts_documentation_en-US" xlink:label="lab_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Provision For Decommissioning, Restoration And Rehabilitation Costs</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:to="lab_tac_AssetAcquisitionProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_country_US_cdb08167-fe0b-46ee-8995-8c3c51672c2a_terseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UNITED STATES</link:label>
    <link:label id="lab_country_US_745456ff-42f8-471f-9c61-01ce1ccdb127_verboseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9a111f90-0a25-48e2-97d3-8d424dc7ab6c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of nature and extent of risks arising from financial instruments [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of nature and extent of risks arising from financial instruments [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
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    <link:label id="lab_ifrs-full_LeaseReceivablesMember_4088a606-89d9-4752-8470-0f39e263fb85_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease receivables</link:label>
    <link:label id="lab_ifrs-full_LeaseReceivablesMember_label_en-US" xlink:label="lab_ifrs-full_LeaseReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease receivables [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LeaseReceivablesMember" xlink:to="lab_ifrs-full_LeaseReceivablesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member_1d6a848f-9ae8-458a-9ab3-996088d7f53a_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts - foreign-denominated receipts/expenditures CAD 2</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member_label_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Receipts (Expenditures), CAD 2 [Member]</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member_documentation_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Receipts (Expenditures), CAD 2 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:href="tac-20191231.xsd#tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:to="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresCAD2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_65489058-23b9-4c7b-90ff-ac796a3a8cee_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_9a83bc08-2023-4df4-896a-4afc6227f74e_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets</link:label>
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    <link:label id="lab_tac_ProfitLoss1Member_f04e0746-04dc-47ce-b666-440503f0c444_terseLabel_en-US" xlink:label="lab_tac_ProfitLoss1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (Loss)</link:label>
    <link:label id="lab_tac_ProfitLoss1Member_label_en-US" xlink:label="lab_tac_ProfitLoss1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss1 [Member]</link:label>
    <link:label id="lab_tac_ProfitLoss1Member_documentation_en-US" xlink:label="lab_tac_ProfitLoss1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ProfitLoss1Member" xlink:href="tac-20191231.xsd#tac_ProfitLoss1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ProfitLoss1Member" xlink:to="lab_tac_ProfitLoss1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_EmissionsMember_4c3c19ab-1dd5-46a1-9170-afd36d70505d_terseLabel_en-US" xlink:label="lab_tac_EmissionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Emissions</link:label>
    <link:label id="lab_tac_EmissionsMember_label_en-US" xlink:label="lab_tac_EmissionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Emissions [Member]</link:label>
    <link:label id="lab_tac_EmissionsMember_documentation_en-US" xlink:label="lab_tac_EmissionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Emissions [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_EmissionsMember" xlink:href="tac-20191231.xsd#tac_EmissionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_EmissionsMember" xlink:to="lab_tac_EmissionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RecurringFairValueMeasurementMember_b8308b79-8432-4396-bc37-cf6151f1d3c1_terseLabel_en-US" xlink:label="lab_ifrs-full_RecurringFairValueMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Recurring fair value measurement</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecurringFairValueMeasurementMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RecurringFairValueMeasurementMember"/>
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    <link:label id="lab_ifrs-full_BusinessCombinationsAxis_683bb699-ce2c-4d65-a4e3-9f8cadc359a1_terseLabel_en-US" xlink:label="lab_ifrs-full_BusinessCombinationsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combinations [axis]</link:label>
    <link:label id="lab_ifrs-full_BusinessCombinationsAxis_label_en-US" xlink:label="lab_ifrs-full_BusinessCombinationsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combinations [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BusinessCombinationsAxis" xlink:to="lab_ifrs-full_BusinessCombinationsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LetterofCreditMember_2fb586a2-7b1c-4dc5-871b-c84220ec2c67_terseLabel_en-US" xlink:label="lab_tac_LetterofCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letter of credit</link:label>
    <link:label id="lab_tac_LetterofCreditMember_label_en-US" xlink:label="lab_tac_LetterofCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letter of Credit [Member]</link:label>
    <link:label id="lab_tac_LetterofCreditMember_documentation_en-US" xlink:label="lab_tac_LetterofCreditMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Letter of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LetterofCreditMember" xlink:href="tac-20191231.xsd#tac_LetterofCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LetterofCreditMember" xlink:to="lab_tac_LetterofCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialLiabilitiesTable_582751e9-27fd-479d-bceb-bc521ebd3efe_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialLiabilitiesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="lab_ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CapacityOfPowerGenerationAssetsPower_6b136746-e814-4442-a90f-d860d27e7a15_terseLabel_en-US" xlink:label="lab_tac_CapacityOfPowerGenerationAssetsPower" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capacity of facility (in megawatts)</link:label>
    <link:label id="lab_tac_CapacityOfPowerGenerationAssetsPower_label_en-US" xlink:label="lab_tac_CapacityOfPowerGenerationAssetsPower" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capacity Of Power Generation Assets, Power</link:label>
    <link:label id="lab_tac_CapacityOfPowerGenerationAssetsPower_documentation_en-US" xlink:label="lab_tac_CapacityOfPowerGenerationAssetsPower" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capacity Of Generation Units, Power</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CapacityOfPowerGenerationAssetsPower" xlink:href="tac-20191231.xsd#tac_CapacityOfPowerGenerationAssetsPower"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CapacityOfPowerGenerationAssetsPower" xlink:to="lab_tac_CapacityOfPowerGenerationAssetsPower" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherShorttermProvisions_b6644f15-ceed-4272-9c3b-e509aa2f2ae4_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherShorttermProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion</link:label>
    <link:label id="lab_ifrs-full_OtherShorttermProvisions_label_en-US" xlink:label="lab_ifrs-full_OtherShorttermProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other current provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherShorttermProvisions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherShorttermProvisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherShorttermProvisions" xlink:to="lab_ifrs-full_OtherShorttermProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsPremium_a60a111a-82e0-4bfd-89e2-01b024ed4ace_terseLabel_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of prepayment premium recognized in net interest expense</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsPremium_label_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings, Premium</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsPremium_documentation_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings, Premium</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:href="tac-20191231.xsd#tac_RedemptionofNoncurrentBorrowingsPremium"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:to="lab_tac_RedemptionofNoncurrentBorrowingsPremium" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowHedgesAbstract_12c6981a-d5ba-4485-9434-8cb0ecd27eff_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowHedgesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedges</link:label>
    <link:label id="lab_ifrs-full_CashFlowHedgesAbstract_label_en-US" xlink:label="lab_ifrs-full_CashFlowHedgesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow hedges [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowHedgesAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowHedgesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowHedgesAbstract" xlink:to="lab_ifrs-full_CashFlowHedgesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations_d6472874-7b6b-4a0f-a676-f0a5ac8133aa_terseLabel_en-US" xlink:label="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fee expected to be paid for advice and recommendations in connection of operations</link:label>
    <link:label id="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations_label_en-US" xlink:label="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fee Expected To Be Paid For Advice And Recommendations In Connection Of Operations</link:label>
    <link:label id="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations_documentation_en-US" xlink:label="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fee Expected To Be Paid For Advice And Recommendations In Connection Of Operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:href="tac-20191231.xsd#tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:to="lab_tac_FeeExpectedToBePaidForAdviceAndRecommendationsInConnectionOfOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory_d66510c1-bc36-4aa3-afd5-81d186bfbe9c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assumptions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of defined benefit plans [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:to="lab_ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PastDueStatusMember_f9777717-704e-4148-a2e0-bc1562c769be_terseLabel_en-US" xlink:label="lab_ifrs-full_PastDueStatusMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past due status [member]</link:label>
    <link:label id="lab_ifrs-full_PastDueStatusMember_label_en-US" xlink:label="lab_ifrs-full_PastDueStatusMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past due status [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PastDueStatusMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PastDueStatusMember" xlink:to="lab_ifrs-full_PastDueStatusMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CategoriesOfFinancialAssetsAxis_85d87645-f121-4df8-b460-bd973d4a9cb6_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of financial assets [axis]</link:label>
    <link:label id="lab_ifrs-full_CategoriesOfFinancialAssetsAxis_label_en-US" xlink:label="lab_ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of financial assets [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="lab_ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_00002d99-923d-4088-bd69-3d4d52903e0a_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of options (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_label_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options outstanding in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOutstandingShareOptions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NumberOfOutstandingShareOptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfOutstandingShareOptions" xlink:to="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_4f6cfcd7-8998-4199-b8ef-2604bb3f01b1_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income tax assets</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_8e2441e4-f7e0-43ac-9e2d-ce17a29610b0_negatedLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Writedown of deferred income tax assets</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxAssets" xlink:to="lab_ifrs-full_DeferredTaxAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationAndAmortisationExpense_b18adcd2-52c5-414b-ab27-b37561e1ff57_terseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_ifrs-full_DepreciationAndAmortisationExpense_label_en-US" xlink:label="lab_ifrs-full_DepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortisation expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationAndAmortisationExpense" xlink:to="lab_ifrs-full_DepreciationAndAmortisationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_c5c9b67b-c114-488c-b3da-b53d64689128_terseLabel_en-US" xlink:label="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortization</link:label>
    <link:label id="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortisation, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingShares_3856b7cc-962d-425c-b84c-2df69b97d63a_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingShares" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from issuing shares</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingShares_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from issuing shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromIssuingShares" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProceedsFromIssuingShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromIssuingShares" xlink:to="lab_ifrs-full_ProceedsFromIssuingShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_f93c0542-9156-4bff-9180-da5c1964c551_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of share-based payment plans (Note 29)</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through share-based payment transactions, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants_9376eb55-b039-491b-9bbd-3675dbcdc061_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government incentives</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for government grants [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DescriptionOfAccountingPolicyForGovernmentGrants"/>
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    <link:label id="lab_tac_NonRecourseVariableRateDebtMember_62b55d6f-5d73-4c03-a884-23807fd0b11c_terseLabel_en-US" xlink:label="lab_tac_NonRecourseVariableRateDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Variable Rate Debt</link:label>
    <link:label id="lab_tac_NonRecourseVariableRateDebtMember_label_en-US" xlink:label="lab_tac_NonRecourseVariableRateDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Variable Rate Debt [Member]</link:label>
    <link:label id="lab_tac_NonRecourseVariableRateDebtMember_documentation_en-US" xlink:label="lab_tac_NonRecourseVariableRateDebtMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Variable Rate Debt [Member]</link:label>
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    <link:label id="lab_ifrs-full_ExternalCreditGradesAxis_268016bb-c663-4663-8d41-9d4f546c19ec_terseLabel_en-US" xlink:label="lab_ifrs-full_ExternalCreditGradesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">External credit grades [axis]</link:label>
    <link:label id="lab_ifrs-full_ExternalCreditGradesAxis_label_en-US" xlink:label="lab_ifrs-full_ExternalCreditGradesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">External credit grades [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExternalCreditGradesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ExternalCreditGradesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExternalCreditGradesAxis" xlink:to="lab_ifrs-full_ExternalCreditGradesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ContinuingAndDiscontinuedOperationsAxis_1eca42b8-5ce3-4f70-9b89-180a33e0fc2d_terseLabel_en-US" xlink:label="lab_ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Continuing and discontinued operations [axis]</link:label>
    <link:label id="lab_ifrs-full_ContinuingAndDiscontinuedOperationsAxis_label_en-US" xlink:label="lab_ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Continuing and discontinued operations [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ContinuingAndDiscontinuedOperationsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:to="lab_ifrs-full_ContinuingAndDiscontinuedOperationsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentsAxis_8980ba7e-a3f4-47c8-a11c-dfae5eb9a602_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentsAxis" xlink:to="lab_ifrs-full_SegmentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights_212f78d6-c915-4e46-bbed-590225ce7114_terseLabel_en-US" xlink:label="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase price of common shares under Shareholder Rights Plan</link:label>
    <link:label id="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights_label_en-US" xlink:label="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Price Of Common Shares Under Shareholder Rights</link:label>
    <link:label id="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights_documentation_en-US" xlink:label="lab_tac_PurchasePriceOfCommonSharesUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Price Of Common Shares Under Shareholder Rights Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PurchasePriceOfCommonSharesUnderShareholderRights" xlink:href="tac-20191231.xsd#tac_PurchasePriceOfCommonSharesUnderShareholderRights"/>
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    <link:label id="lab_ifrs-full_ProvisionUsedOtherProvisions_1e33cf2c-154c-4dac-b680-80d052f89c98_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ProvisionUsedOtherProvisions" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities settled</link:label>
    <link:label id="lab_ifrs-full_ProvisionUsedOtherProvisions_label_en-US" xlink:label="lab_ifrs-full_ProvisionUsedOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision used, other provisions</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProvisionUsedOtherProvisions" xlink:to="lab_ifrs-full_ProvisionUsedOtherProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Liabilities_499684bb-244f-4020-864e-dc017f0fb1a4_terseLabel_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_ifrs-full_Liabilities_label_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Liabilities" xlink:to="lab_ifrs-full_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_InterestsInOtherEntitiesAbstract_04890fcf-0a6e-4e99-9f54-5f670a585cd7_terseLabel_en-US" xlink:label="lab_tac_InterestsInOtherEntitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interests In Other Entities [Abstract]</link:label>
    <link:label id="lab_tac_InterestsInOtherEntitiesAbstract_label_en-US" xlink:label="lab_tac_InterestsInOtherEntitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interests In Other Entities [Abstract]</link:label>
    <link:label id="lab_tac_InterestsInOtherEntitiesAbstract_documentation_en-US" xlink:label="lab_tac_InterestsInOtherEntitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interests In Other Entities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_InterestsInOtherEntitiesAbstract" xlink:href="tac-20191231.xsd#tac_InterestsInOtherEntitiesAbstract"/>
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    <link:label id="lab_tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1_6f6c8652-8616-4a35-be70-63f2a57bc896_terseLabel_en-US" xlink:label="lab_tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employer contribution (as percent)</link:label>
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    <link:label id="lab_tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1_documentation_en-US" xlink:label="lab_tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1" xlink:href="tac-20191231.xsd#tac_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent1"/>
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    <link:label id="lab_ifrs-full_WeightedAverageSharePrice_80eb423b-9a23-4a92-a82f-ca9584cb2bf6_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average share price</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageSharePrice_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average share price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageSharePrice" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_WeightedAverageSharePrice"/>
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    <link:label id="lab_tac_LongtermServiceObligation_0d3a5298-dd40-4f76-abbd-c574c4d07308_terseLabel_en-US" xlink:label="lab_tac_LongtermServiceObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term service agreements</link:label>
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    <link:label id="lab_tac_LongtermServiceObligation_documentation_en-US" xlink:label="lab_tac_LongtermServiceObligation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Service Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongtermServiceObligation" xlink:href="tac-20191231.xsd#tac_LongtermServiceObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LongtermServiceObligation" xlink:to="lab_tac_LongtermServiceObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory_59cd19a7-17e4-4117-a33e-21092683fd4a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Instruments</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about hedging instruments [text block]</link:label>
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    <link:label id="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoveragetarget_c62d4f00-3dc8-42a2-8b5c-5df42753a723_terseLabel_en-US" xlink:label="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoveragetarget" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comparable funds from operations to adjusted interest coverage, Target</link:label>
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    <link:label id="lab_tac_SeniorNotes1Member_8cd7fa81-932a-4b65-b2ea-b84de9d58713_terseLabel_en-US" xlink:label="lab_tac_SeniorNotes1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior notes</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_SeniorNotes1Member" xlink:href="tac-20191231.xsd#tac_SeniorNotes1Member"/>
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    <link:label id="lab_tac_OperationsMaintenanceAndAdministrativeExpense_dbcbb8bb-8aa5-4726-a058-39f36b503580_totalLabel_en-US" xlink:label="lab_tac_OperationsMaintenanceAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_tac_OperationsMaintenanceAndAdministrativeExpense_documentation_en-US" xlink:label="lab_tac_OperationsMaintenanceAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operations, Maintenance, And Administrative Expense</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_fb08d497-6b53-4b1a-86a2-01fa3434e2ba_verboseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts receivable</link:label>
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    <link:label id="lab_tac_IncomeStatementLocation1Axis_4529419b-4ba4-4fa0-9374-bcbbc09facfc_terseLabel_en-US" xlink:label="lab_tac_IncomeStatementLocation1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:label id="lab_tac_IncomeStatementLocation1Axis_label_en-US" xlink:label="lab_tac_IncomeStatementLocation1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location1 [Axis]</link:label>
    <link:label id="lab_tac_IncomeStatementLocation1Axis_documentation_en-US" xlink:label="lab_tac_IncomeStatementLocation1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncomeStatementLocation1Axis" xlink:href="tac-20191231.xsd#tac_IncomeStatementLocation1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncomeStatementLocation1Axis" xlink:to="lab_tac_IncomeStatementLocation1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption_7cc5770b-faf3-4aa2-a53c-6944336db4ad_terseLabel_en-US" xlink:label="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impact of change in accounting policy (Note 3)</link:label>
    <link:label id="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption_label_en-US" xlink:label="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Effect of New Accounting Principle in Period of Adoption</link:label>
    <link:label id="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption_documentation_en-US" xlink:label="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Effect of New Accounting Principle in Period of Adoption</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:href="tac-20191231.xsd#tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:to="lab_tac_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoption" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowings_939b9848-b910-4013-960f-88d6901da9de_terseLabel_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of noncurrent borrowings</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowings_3b2f2653-7ab6-48b5-834c-fd080fd54632_verboseLabel_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of unsecured debt</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowings_label_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowings_documentation_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RedemptionofNoncurrentBorrowings" xlink:href="tac-20191231.xsd#tac_RedemptionofNoncurrentBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RedemptionofNoncurrentBorrowings" xlink:to="lab_tac_RedemptionofNoncurrentBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_530eac53-9bf7-4c61-af2d-4b7ddc675de8_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange impact</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities"/>
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    <link:label id="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems_e5517208-d960-4ef1-ab04-d18a61145904_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of types of insurance contracts [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of types of insurance contracts [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems" xlink:to="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GeographicalAreasMember_3c9936d4-f529-477b-8144-f3bc494efd29_terseLabel_en-US" xlink:label="lab_ifrs-full_GeographicalAreasMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical areas [member]</link:label>
    <link:label id="lab_ifrs-full_GeographicalAreasMember_label_en-US" xlink:label="lab_ifrs-full_GeographicalAreasMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical areas [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GeographicalAreasMember" xlink:to="lab_ifrs-full_GeographicalAreasMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory_9c98fee3-f0f8-4ab5-a213-09f61b5ba97a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in joint arrangements</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in joint arrangements [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfInterestsInJointArrangementsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SkookumchuckWindEnergyFacilityMember_b41d2ef3-20e0-4b8f-b0b9-6b7f09d26693_terseLabel_en-US" xlink:label="lab_tac_SkookumchuckWindEnergyFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Skookumchuck Wind Energy Facility</link:label>
    <link:label id="lab_tac_SkookumchuckWindEnergyFacilityMember_label_en-US" xlink:label="lab_tac_SkookumchuckWindEnergyFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Skookumchuck Wind Energy Facility [Member]</link:label>
    <link:label id="lab_tac_SkookumchuckWindEnergyFacilityMember_documentation_en-US" xlink:label="lab_tac_SkookumchuckWindEnergyFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Skookumchuck Wind Energy Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SkookumchuckWindEnergyFacilityMember" xlink:href="tac-20191231.xsd#tac_SkookumchuckWindEnergyFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SkookumchuckWindEnergyFacilityMember" xlink:to="lab_tac_SkookumchuckWindEnergyFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAndLiabilities_8aaa4454-ace8-40ed-8415-557dd6bceba2_totalLabel_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities and equity</link:label>
    <link:label id="lab_ifrs-full_EquityAndLiabilities_label_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity and liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EquityAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAndLiabilities" xlink:to="lab_ifrs-full_EquityAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HedgingInstruments1Member_4098091d-0889-401a-8ad6-9a1a9bfbd444_terseLabel_en-US" xlink:label="lab_tac_HedgingInstruments1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Designated as a hedge</link:label>
    <link:label id="lab_tac_HedgingInstruments1Member_label_en-US" xlink:label="lab_tac_HedgingInstruments1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Instruments1 [Member]</link:label>
    <link:label id="lab_tac_HedgingInstruments1Member_documentation_en-US" xlink:label="lab_tac_HedgingInstruments1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Instruments1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HedgingInstruments1Member" xlink:href="tac-20191231.xsd#tac_HedgingInstruments1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HedgingInstruments1Member" xlink:to="lab_tac_HedgingInstruments1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_A3.834NonRecourseBondDue2028Member_c6856b06-3b27-43a0-882d-d5475fd2ecd7_terseLabel_en-US" xlink:label="lab_tac_A3.834NonRecourseBondDue2028Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.834% Non-Recourse Bond due 2028</link:label>
    <link:label id="lab_tac_A3.834NonRecourseBondDue2028Member_label_en-US" xlink:label="lab_tac_A3.834NonRecourseBondDue2028Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.834% Non-Recourse Bond Due 2028 [Member]</link:label>
    <link:label id="lab_tac_A3.834NonRecourseBondDue2028Member_documentation_en-US" xlink:label="lab_tac_A3.834NonRecourseBondDue2028Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.834% Non-Recourse Bond Due 2028 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_A3.834NonRecourseBondDue2028Member" xlink:href="tac-20191231.xsd#tac_A3.834NonRecourseBondDue2028Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_A3.834NonRecourseBondDue2028Member" xlink:to="lab_tac_A3.834NonRecourseBondDue2028Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_d7f0f8a4-0b9f-428c-ace6-0b687cc275ce_terseLabel_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross carrying amount</link:label>
    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_label_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross carrying amount [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GrossCarryingAmountMember" xlink:to="lab_ifrs-full_GrossCarryingAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalTable_3bf600e4-6d08-4e93-ab13-504a320f9e8a_terseLabel_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of capital [Table]</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalTable_label_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of capital [Table]</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalTable_documentation_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">disclosure of components of capital [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofcomponentsofcapitalTable" xlink:href="tac-20191231.xsd#tac_DisclosureofcomponentsofcapitalTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofcomponentsofcapitalTable" xlink:to="lab_tac_DisclosureofcomponentsofcapitalTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_KeephillsUnit3Member_5450cf5e-f9a9-4e8f-b900-48c82a66a9e0_terseLabel_en-US" xlink:label="lab_tac_KeephillsUnit3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Keephills Unit 3</link:label>
    <link:label id="lab_tac_KeephillsUnit3Member_label_en-US" xlink:label="lab_tac_KeephillsUnit3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Keephills Unit 3 [Member]</link:label>
    <link:label id="lab_tac_KeephillsUnit3Member_documentation_en-US" xlink:label="lab_tac_KeephillsUnit3Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Keephills Unit 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_KeephillsUnit3Member" xlink:href="tac-20191231.xsd#tac_KeephillsUnit3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_KeephillsUnit3Member" xlink:to="lab_tac_KeephillsUnit3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ARatingMember_285e7e88-845f-4f00-ae73-1eaf284b0883_terseLabel_en-US" xlink:label="lab_tac_ARatingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A</link:label>
    <link:label id="lab_tac_ARatingMember_label_en-US" xlink:label="lab_tac_ARatingMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A Rating [Member]</link:label>
    <link:label id="lab_tac_ARatingMember_documentation_en-US" xlink:label="lab_tac_ARatingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">A Rating [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ARatingMember" xlink:to="lab_tac_ARatingMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition_label_en-US" xlink:label="lab_ifrs-full_NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements in statement of financial position</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition" xlink:to="lab_ifrs-full_NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_RevenueAndOperatingIncome_afdfce04-a3ff-4a3a-9c01-a36144945998_totalLabel_en-US" xlink:label="lab_ifrs-full_RevenueAndOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating income</link:label>
    <link:label id="lab_ifrs-full_RevenueAndOperatingIncome_label_en-US" xlink:label="lab_ifrs-full_RevenueAndOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue and other operating income</link:label>
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    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_4a89bd78-bde8-4dda-bd8b-c19531c5e5ca_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022</link:label>
    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than two years and not later than three years [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:to="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent_497524b0-2d4b-49b7-8db2-d345b8894ba3_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis in derivative, price discount, percent</link:label>
    <link:label id="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent_label_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis In Derivative, Price Discount, Percent</link:label>
    <link:label id="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent_documentation_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativePriceDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis In Derivative, Price Discount, Percent</link:label>
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    <link:label id="lab_tac_NonHedgesMember_c56b1c81-1d86-44f4-a35b-93a38fb604bd_terseLabel_en-US" xlink:label="lab_tac_NonHedgesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Hedges</link:label>
    <link:label id="lab_tac_NonHedgesMember_label_en-US" xlink:label="lab_tac_NonHedgesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Hedges [Member]</link:label>
    <link:label id="lab_tac_NonHedgesMember_documentation_en-US" xlink:label="lab_tac_NonHedgesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Hedges [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NonHedgesMember" xlink:href="tac-20191231.xsd#tac_NonHedgesMember"/>
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    <link:label id="lab_tac_SecuredDebt1Member_e9fa6263-d78f-4b99-9f19-47ee99206dc1_terseLabel_en-US" xlink:label="lab_tac_SecuredDebt1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt</link:label>
    <link:label id="lab_tac_SecuredDebt1Member_label_en-US" xlink:label="lab_tac_SecuredDebt1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt1 [Member]</link:label>
    <link:label id="lab_tac_SecuredDebt1Member_documentation_en-US" xlink:label="lab_tac_SecuredDebt1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Secured Debt1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SecuredDebt1Member" xlink:href="tac-20191231.xsd#tac_SecuredDebt1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SecuredDebt1Member" xlink:to="lab_tac_SecuredDebt1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_212719fa-cc6a-45ac-8a33-18d9a8a262e1_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about financial instruments [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about financial instruments [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:to="lab_ifrs-full_DisclosureOfFinancialInstrumentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory_2466b723-0043-4240-8329-857c0608dfdb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of non-controlling interests [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory"/>
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    <link:label id="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent_73f1ccd4-9ce3-4ee2-ba46-d0e8e7455c1a_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis in derivative, basis relationship, percent</link:label>
    <link:label id="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent_label_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis In Derivative, Basis Relationship, Percent</link:label>
    <link:label id="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent_documentation_en-US" xlink:label="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis In Derivative, Basis Relationship, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:href="tac-20191231.xsd#tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:to="lab_tac_SensitivityAnalysisInDerivativeBasisRelationshipPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CreditRiskMember_0e3f2922-8f29-4a9e-9d29-4496d736fd90_terseLabel_en-US" xlink:label="lab_ifrs-full_CreditRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit risk</link:label>
    <link:label id="lab_ifrs-full_CreditRiskMember_label_en-US" xlink:label="lab_ifrs-full_CreditRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit risk [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CreditRiskMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CreditRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CreditRiskMember" xlink:to="lab_ifrs-full_CreditRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ThreeRenewableAssetsMember_04d08592-63cb-487a-b003-15c61b6ff2d9_terseLabel_en-US" xlink:label="lab_tac_ThreeRenewableAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three Renewable Assets</link:label>
    <link:label id="lab_tac_ThreeRenewableAssetsMember_label_en-US" xlink:label="lab_tac_ThreeRenewableAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three Renewable Assets [Member]</link:label>
    <link:label id="lab_tac_ThreeRenewableAssetsMember_documentation_en-US" xlink:label="lab_tac_ThreeRenewableAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three Renewable Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ThreeRenewableAssetsMember" xlink:href="tac-20191231.xsd#tac_ThreeRenewableAssetsMember"/>
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    <link:label id="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset_4b433bb7-504e-4f1d-90fb-66b9f5f3bc04_terseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefits paid</link:label>
    <link:label id="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset_72940f99-b9b1-4c76-b63b-b1a0f81599f0_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Benefits paid</link:label>
    <link:label id="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset_label_en-US" xlink:label="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments in respect of settlements, net defined benefit liability (asset)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:to="lab_ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestExpense_66175d82-5069-45cd-8c00-4545060b8564_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net interest expense (Note 10)</link:label>
    <link:label id="lab_ifrs-full_InterestExpense_f77f4c04-7044-4e87-b40e-e5738b735d43_negatedLabel_en-US" xlink:label="lab_ifrs-full_InterestExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_ifrs-full_InterestExpense_a40e0345-28b4-4363-bb36-e5aec83181e8_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_ifrs-full_InterestExpense_label_en-US" xlink:label="lab_ifrs-full_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestExpense" xlink:to="lab_ifrs-full_InterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradingSecuritiesMember_c2b14ec5-4cc8-4286-b2b1-b098f1c10a5a_terseLabel_en-US" xlink:label="lab_ifrs-full_TradingSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading securities</link:label>
    <link:label id="lab_ifrs-full_TradingSecuritiesMember_label_en-US" xlink:label="lab_ifrs-full_TradingSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading securities [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradingSecuritiesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TradingSecuritiesMember"/>
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    <link:label id="lab_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable_a0ecb297-ccf3-4f4c-b12a-b6cd2e899045_terseLabel_en-US" xlink:label="lab_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Less: unearned finance lease income</link:label>
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    <link:label id="lab_tac_DeferredRevenuesTemporaryDifferencesMember_984568b5-b34f-4e1d-b9f6-df0e07a61578_terseLabel_en-US" xlink:label="lab_tac_DeferredRevenuesTemporaryDifferencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred coal revenues</link:label>
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    <link:label id="lab_ifrs-full_ComponentsOfEquityAxis_12cec5d3-160c-478d-8119-d76c42935ea3_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of equity [axis]</link:label>
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    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment_7b1673fb-43ba-4ff1-8da1-d594f5abc0fd_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment charges</link:label>
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    <link:label id="lab_tac_CanadianHydroDevelopersInc.Member_d8cb1076-bf43-4aac-8aed-b21c8478b0c8_terseLabel_en-US" xlink:label="lab_tac_CanadianHydroDevelopersInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Canadian Hydro Developers Inc.</link:label>
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    <link:label id="lab_ifrs-full_TaxExpenseOtherThanIncomeTaxExpense_0e708c7b-1bc8-41af-bd30-ed476e161b7b_terseLabel_en-US" xlink:label="lab_ifrs-full_TaxExpenseOtherThanIncomeTaxExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxes, other than income taxes</link:label>
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    <link:label id="lab_ifrs-full_ExpectedFutureMinimumSubleasePaymentsReceivableUnderNoncancellableSubleasesClassifiedFinanceLease_497b9b0d-0c4a-48cf-9e2c-63e4d03fee15_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpectedFutureMinimumSubleasePaymentsReceivableUnderNoncancellableSubleasesClassifiedFinanceLease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum lease receipts</link:label>
    <link:label id="lab_ifrs-full_ExpectedFutureMinimumSubleasePaymentsReceivableUnderNoncancellableSubleasesClassifiedFinanceLease_label_en-US" xlink:label="lab_ifrs-full_ExpectedFutureMinimumSubleasePaymentsReceivableUnderNoncancellableSubleasesClassifiedFinanceLease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected future minimum sublease payments receivable under non-cancellable subleases, classified as finance lease</link:label>
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    <link:label id="lab_tac_AssetsHeldForSalePolicyTextBlock_0576158d-b8ee-4ac2-a2eb-08fad07c7261_terseLabel_en-US" xlink:label="lab_tac_AssetsHeldForSalePolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets Held for Sale&#160;</link:label>
    <link:label id="lab_tac_AssetsHeldForSalePolicyTextBlock_label_en-US" xlink:label="lab_tac_AssetsHeldForSalePolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets Held For Sale [Policy Text Block]</link:label>
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    <link:label id="lab_ifrs-full_ImpairmentLoss_d033995e-947d-4d27-8698-56f93598a7ba_terseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment loss</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLoss_label_en-US" xlink:label="lab_ifrs-full_ImpairmentLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLoss" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ImpairmentLoss"/>
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    <link:label id="lab_tac_GainsLossesOnCashFlowHedgesRelatingToEquityNetOfTax_6a58afc5-e321-43c7-93fd-e3aea400e0d5_terseLabel_en-US" xlink:label="lab_tac_GainsLossesOnCashFlowHedgesRelatingToEquityNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net losses on derivatives designated as cash flow hedges, net of tax</link:label>
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    <link:label id="lab_tac_GainsLossesOnCashFlowHedgesRelatingToEquityNetOfTax_documentation_en-US" xlink:label="lab_tac_GainsLossesOnCashFlowHedgesRelatingToEquityNetOfTax" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) On Cash Flow Hedges Relating To Equity, Net Of Tax</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent_e4e6f3ed-5296-4270-9ebe-0ca8a7361c41_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Volume discount ranges, percent</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent_label_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Volume Discount, Percent</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Volume Discount, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:to="lab_tac_IncreaseDecreaseInDerivativeVolumeDiscountPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TermOfPreferenceSharesDividendDistribution_ecd804ad-1a4f-46c5-aa4b-043c5ef02fee_terseLabel_en-US" xlink:label="lab_tac_TermOfPreferenceSharesDividendDistribution" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment period for cumulative preferential cash dividends</link:label>
    <link:label id="lab_tac_TermOfPreferenceSharesDividendDistribution_label_en-US" xlink:label="lab_tac_TermOfPreferenceSharesDividendDistribution" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Of Preference Shares Dividend Distribution</link:label>
    <link:label id="lab_tac_TermOfPreferenceSharesDividendDistribution_documentation_en-US" xlink:label="lab_tac_TermOfPreferenceSharesDividendDistribution" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term Of Preference Shares Dividend Distribution</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TermOfPreferenceSharesDividendDistribution" xlink:href="tac-20191231.xsd#tac_TermOfPreferenceSharesDividendDistribution"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TermOfPreferenceSharesDividendDistribution" xlink:to="lab_tac_TermOfPreferenceSharesDividendDistribution" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetirementsPropertyPlantAndEquipment_b0b68145-c8c2-4a80-98a6-f2fd585b15cc_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_RetirementsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement of assets</link:label>
    <link:label id="lab_ifrs-full_RetirementsPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_RetirementsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirements, property, plant and equipment</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetirementsPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_RetirementsPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DocumentAndEntityInformationAbstract_b093b9ca-7f00-485b-a920-eeb56edfb002_terseLabel_en-US" xlink:label="lab_tac_DocumentAndEntityInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
    <link:label id="lab_tac_DocumentAndEntityInformationAbstract_label_en-US" xlink:label="lab_tac_DocumentAndEntityInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
    <link:label id="lab_tac_DocumentAndEntityInformationAbstract_documentation_en-US" xlink:label="lab_tac_DocumentAndEntityInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DocumentAndEntityInformationAbstract" xlink:href="tac-20191231.xsd#tac_DocumentAndEntityInformationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DocumentAndEntityInformationAbstract" xlink:to="lab_tac_DocumentAndEntityInformationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_ca5e37a6-7c53-4bfe-a280-4f6668d8a285_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial instruments [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory"/>
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    <link:label id="lab_tac_IFRS16Member_d5474322-441f-48ae-86d6-b745cce3471b_terseLabel_en-US" xlink:label="lab_tac_IFRS16Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRS 16</link:label>
    <link:label id="lab_tac_IFRS16Member_label_en-US" xlink:label="lab_tac_IFRS16Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRS 16 [Member]</link:label>
    <link:label id="lab_tac_IFRS16Member_documentation_en-US" xlink:label="lab_tac_IFRS16Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRS 16 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IFRS16Member" xlink:href="tac-20191231.xsd#tac_IFRS16Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IFRS16Member" xlink:to="lab_tac_IFRS16Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherProvisionsAbstract_a40f3827-51a6-4545-8240-ff25bc2fc40f_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherProvisionsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherProvisionsAbstract_label_en-US" xlink:label="lab_ifrs-full_OtherProvisionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other provisions [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisionsAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherProvisionsAbstract"/>
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    <link:label id="lab_tac_A3.963NonRecourseBondDue2032Member_0e3a9103-e233-4ea6-a4d3-622759da04ae_terseLabel_en-US" xlink:label="lab_tac_A3.963NonRecourseBondDue2032Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.963% Non-Recourse Bond due 2032</link:label>
    <link:label id="lab_tac_A3.963NonRecourseBondDue2032Member_label_en-US" xlink:label="lab_tac_A3.963NonRecourseBondDue2032Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.963% Non-Recourse Bond Due 2032 [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_A3.963NonRecourseBondDue2032Member" xlink:href="tac-20191231.xsd#tac_A3.963NonRecourseBondDue2032Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_A3.963NonRecourseBondDue2032Member" xlink:to="lab_tac_A3.963NonRecourseBondDue2032Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures_71431f98-dc00-477e-ba8e-b1b814a4d525_terseLabel_en-US" xlink:label="lab_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of performance measures</link:label>
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    <link:label id="lab_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures_documentation_en-US" xlink:label="lab_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Number of Performance Measures</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures" xlink:href="tac-20191231.xsd#tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures" xlink:to="lab_tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberofPerformanceMeasures" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour_a00457ee-6e64-4108-af6e-761777c8b1bd_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount sold</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour_label_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold Per Hour</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold Per Hour</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountSoldPerHour"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:to="lab_tac_DerivativeNonmonetaryNotionalAmountSoldPerHour" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfInsuranceContractsAxis_49573c1e-bb17-4b2b-bcf7-d7b466814129_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfInsuranceContractsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of insurance contracts [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfInsuranceContractsAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfInsuranceContractsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of insurance contracts [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInsuranceContractsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfInsuranceContractsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfInsuranceContractsAxis" xlink:to="lab_ifrs-full_TypesOfInsuranceContractsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_EnergyMarketingMember_5e6cbf74-4196-4948-b815-5a6f6563bf13_terseLabel_en-US" xlink:label="lab_tac_EnergyMarketingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy Marketing</link:label>
    <link:label id="lab_tac_EnergyMarketingMember_407d25d8-5cd4-4a87-8f83-d9967baea75b_verboseLabel_en-US" xlink:label="lab_tac_EnergyMarketingMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy Marketing</link:label>
    <link:label id="lab_tac_EnergyMarketingMember_label_en-US" xlink:label="lab_tac_EnergyMarketingMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy Marketing [Member]</link:label>
    <link:label id="lab_tac_EnergyMarketingMember_documentation_en-US" xlink:label="lab_tac_EnergyMarketingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Energy Marketing [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_EnergyMarketingMember" xlink:href="tac-20191231.xsd#tac_EnergyMarketingMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_EnergyMarketingMember" xlink:to="lab_tac_EnergyMarketingMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentTradeReceivables_fbc48abe-70fc-44dc-b2d9-7d5b584ff8e2_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTradeReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade accounts receivable</link:label>
    <link:label id="lab_ifrs-full_CurrentTradeReceivables_label_en-US" xlink:label="lab_ifrs-full_CurrentTradeReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current trade receivables</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTradeReceivables" xlink:to="lab_ifrs-full_CurrentTradeReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_ee1778e6-e8bc-4ff9-a5f7-96a4f2c9c958_terseLabel_en-US" xlink:label="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decommissioning&#160;and restoration</link:label>
    <link:label id="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_label_en-US" xlink:label="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision for decommissioning, restoration and rehabilitation costs [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember" xlink:to="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual_90ac5efd-e77b-4624-9522-beec0d174585_terseLabel_en-US" xlink:label="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comparable funds from operations to adjusted interest coverage, actual</link:label>
    <link:label id="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual_label_en-US" xlink:label="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comparable funds from operations before interest to adjusted interest coverage, actual</link:label>
    <link:label id="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual_documentation_en-US" xlink:label="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comparable funds from operations before interest to adjusted interest coverage, actual</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:href="tac-20191231.xsd#tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:to="lab_tac_Comparablefundsfromoperationsbeforeinteresttoadjustedinterestcoverageactual" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock_4fa567ff-9998-4a96-b1eb-dc0763b202b6_terseLabel_en-US" xlink:label="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Components of net interest expense</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of interest expense [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of interest expense [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureofcomponentsofinterestexpenseTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:to="lab_tac_DisclosureofcomponentsofinterestexpenseTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionalPaidinCapital_04406054-9cf2-4161-91bf-8a1b179fb9b8_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionalPaidinCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed surplus</link:label>
    <link:label id="lab_ifrs-full_AdditionalPaidinCapital_label_en-US" xlink:label="lab_ifrs-full_AdditionalPaidinCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionalPaidinCapital" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AdditionalPaidinCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionalPaidinCapital" xlink:to="lab_ifrs-full_AdditionalPaidinCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofCommitmentsLineItems_a312c87f-6763-49fd-8977-60c54e0b589f_terseLabel_en-US" xlink:label="lab_tac_DisclosureofCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Commitments [Line Items]</link:label>
    <link:label id="lab_tac_DisclosureofCommitmentsLineItems_label_en-US" xlink:label="lab_tac_DisclosureofCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Commitments [Line Items]</link:label>
    <link:label id="lab_tac_DisclosureofCommitmentsLineItems_documentation_en-US" xlink:label="lab_tac_DisclosureofCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Line Items] for Disclosure of Commitments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofCommitmentsLineItems" xlink:href="tac-20191231.xsd#tac_DisclosureofCommitmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofCommitmentsLineItems" xlink:to="lab_tac_DisclosureofCommitmentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_54614c4b-0bf6-488a-b933-e864e7b6cb0a_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill [member]</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:to="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NetDeferredTaxAssets_ddb2cb65-e034-49d5-bf17-949cdfcb5480_terseLabel_en-US" xlink:label="lab_ifrs-full_NetDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax assets</link:label>
    <link:label id="lab_ifrs-full_NetDeferredTaxAssets_label_en-US" xlink:label="lab_ifrs-full_NetDeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NetDeferredTaxAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NetDeferredTaxAssets" xlink:to="lab_ifrs-full_NetDeferredTaxAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LineofCreditFacilityCancelledCapacity_8ab4f68b-69a1-4f5b-a1c7-8386b5b5ab39_terseLabel_en-US" xlink:label="lab_tac_LineofCreditFacilityCancelledCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of credit facility, cancelled capacity</link:label>
    <link:label id="lab_tac_LineofCreditFacilityCancelledCapacity_label_en-US" xlink:label="lab_tac_LineofCreditFacilityCancelledCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Cancelled Capacity</link:label>
    <link:label id="lab_tac_LineofCreditFacilityCancelledCapacity_documentation_en-US" xlink:label="lab_tac_LineofCreditFacilityCancelledCapacity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit Facility, Cancelled Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LineofCreditFacilityCancelledCapacity" xlink:href="tac-20191231.xsd#tac_LineofCreditFacilityCancelledCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LineofCreditFacilityCancelledCapacity" xlink:to="lab_tac_LineofCreditFacilityCancelledCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherAdjustmentsToReconcileProfitLoss_a251f858-2413-4213-b039-b2fed0824107_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss) from operating activities</link:label>
    <link:label id="lab_ifrs-full_OtherAdjustmentsToReconcileProfitLoss_label_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other adjustments to reconcile profit (loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherAdjustmentsToReconcileProfitLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:to="lab_ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AssetRetirementObligationUndiscounted_075f53c9-026b-4ce4-bebb-cc8021f0a5f7_terseLabel_en-US" xlink:label="lab_tac_AssetRetirementObligationUndiscounted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted cash flows required for future removal of facilities</link:label>
    <link:label id="lab_tac_AssetRetirementObligationUndiscounted_label_en-US" xlink:label="lab_tac_AssetRetirementObligationUndiscounted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligation, Undiscounted</link:label>
    <link:label id="lab_tac_AssetRetirementObligationUndiscounted_documentation_en-US" xlink:label="lab_tac_AssetRetirementObligationUndiscounted" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Retirement Obligation, Undiscounted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AssetRetirementObligationUndiscounted" xlink:href="tac-20191231.xsd#tac_AssetRetirementObligationUndiscounted"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AssetRetirementObligationUndiscounted" xlink:to="lab_tac_AssetRetirementObligationUndiscounted" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_e5181050-733c-4a22-8981-f23058470988_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of temporary difference, unused tax losses and unused tax credits [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of temporary difference, unused tax losses and unused tax credits [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:to="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherAssetsMember_5564840d-b055-423d-b900-aec051e0f599_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_ifrs-full_OtherAssetsMember_label_en-US" xlink:label="lab_ifrs-full_OtherAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAssetsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherAssetsMember" xlink:to="lab_ifrs-full_OtherAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis_0a69fb0a-89e5-4f50-b8bc-fe511490d08f_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial effect of transition from previous GAAP to IFRSs [axis]</link:label>
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    <link:label id="lab_tac_MississaugaCogenerationFacilityContractMember_04460c3e-d2b7-4e45-9365-714f121fd314_terseLabel_en-US" xlink:label="lab_tac_MississaugaCogenerationFacilityContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mississauga Cogeneration Facility Contract [Member]</link:label>
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    <link:label id="lab_ifrs-full_NoncurrentFinanceLeaseReceivables_ffe69eda-71f5-4812-993c-5b2710c208ae_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term portion of finance lease receivable</link:label>
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    <link:label id="lab_ifrs-full_ContingentRentsRecognisedAsIncomeClassifiedAsOperatingLease_6c7a657a-555e-4286-98a3-85537a98b13b_terseLabel_en-US" xlink:label="lab_ifrs-full_ContingentRentsRecognisedAsIncomeClassifiedAsOperatingLease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent rents recognised as income, classified as operating lease</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfPropertyPlantAndEquipment_6a8e0a3e-d190-470b-a029-ed1e871cea44_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on disposals of property, plant and equipment</link:label>
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    <link:label id="lab_tac_ImpliedCorrelationsForSharesSignificantUnobservableInputsEntitysOwnDerivative_c299be2c-5aab-4dc3-9730-4c0243357dfc_terseLabel_en-US" xlink:label="lab_tac_ImpliedCorrelationsForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Implied correlations for shares, significant unobservable inputs, entity's own derivative</link:label>
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    <link:label id="lab_tac_PreferenceSharesFixedRateResetTerm_label_en-US" xlink:label="lab_tac_PreferenceSharesFixedRateResetTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares Fixed Rate Reset Term</link:label>
    <link:label id="lab_tac_PreferenceSharesFixedRateResetTerm_documentation_en-US" xlink:label="lab_tac_PreferenceSharesFixedRateResetTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares Fixed Rate Reset Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PreferenceSharesFixedRateResetTerm" xlink:href="tac-20191231.xsd#tac_PreferenceSharesFixedRateResetTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PreferenceSharesFixedRateResetTerm" xlink:to="lab_tac_PreferenceSharesFixedRateResetTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Netcapitalinflowsoutflows_ba4f0a46-bc41-4486-8002-8ffbef4d0c41_totalLabel_en-US" xlink:label="lab_tac_Netcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net inflows (outflows) of cash</link:label>
    <link:label id="lab_tac_Netcapitalinflowsoutflows_label_en-US" xlink:label="lab_tac_Netcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net capital inflows (outflows)</link:label>
    <link:label id="lab_tac_Netcapitalinflowsoutflows_documentation_en-US" xlink:label="lab_tac_Netcapitalinflowsoutflows" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net capital inflows (outflows)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Netcapitalinflowsoutflows" xlink:href="tac-20191231.xsd#tac_Netcapitalinflowsoutflows"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Netcapitalinflowsoutflows" xlink:to="lab_tac_Netcapitalinflowsoutflows" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GovernmentIncentivesMember_0987ad0b-5cee-4168-a8a7-4651311cafa8_terseLabel_en-US" xlink:label="lab_tac_GovernmentIncentivesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government Incentives [Member]</link:label>
    <link:label id="lab_tac_GovernmentIncentivesMember_label_en-US" xlink:label="lab_tac_GovernmentIncentivesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government Incentives [Member]</link:label>
    <link:label id="lab_tac_GovernmentIncentivesMember_documentation_en-US" xlink:label="lab_tac_GovernmentIncentivesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Government Incentives [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GovernmentIncentivesMember" xlink:href="tac-20191231.xsd#tac_GovernmentIncentivesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GovernmentIncentivesMember" xlink:to="lab_tac_GovernmentIncentivesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_a92af7ee-9f85-4a11-b7c9-0dddec42896d_verboseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenues (Note 5)</link:label>
    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_ab3d8286-ae07-4cd9-a67c-70ce56c4e395_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_label_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueFromContractsWithCustomers" xlink:to="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill_52b5e878-cba9-4905-90aa-2a789baee116_negatedLabel_en-US" xlink:label="lab_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals</link:label>
    <link:label id="lab_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestRateRiskMember_39089bab-90c2-47d8-945a-f2d8c5ee1814_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate risk</link:label>
    <link:label id="lab_ifrs-full_InterestRateRiskMember_label_en-US" xlink:label="lab_ifrs-full_InterestRateRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate risk [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateRiskMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestRateRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestRateRiskMember" xlink:to="lab_ifrs-full_InterestRateRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CashAndCashEquivalents1Member_d2691d1e-1c31-4383-a840-4f199e18ff24_terseLabel_en-US" xlink:label="lab_tac_CashAndCashEquivalents1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_tac_CashAndCashEquivalents1Member_label_en-US" xlink:label="lab_tac_CashAndCashEquivalents1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash And Cash Equivalents1 [Member]</link:label>
    <link:label id="lab_tac_CashAndCashEquivalents1Member_documentation_en-US" xlink:label="lab_tac_CashAndCashEquivalents1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash And Cash Equivalents [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CashAndCashEquivalents1Member" xlink:href="tac-20191231.xsd#tac_CashAndCashEquivalents1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CashAndCashEquivalents1Member" xlink:to="lab_tac_CashAndCashEquivalents1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_VariableRate1Domain_aa7318a1-524e-42f8-8669-1742cdb709c0_terseLabel_en-US" xlink:label="lab_tac_VariableRate1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_tac_VariableRate1Domain_label_en-US" xlink:label="lab_tac_VariableRate1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate1 [Domain]</link:label>
    <link:label id="lab_tac_VariableRate1Domain_documentation_en-US" xlink:label="lab_tac_VariableRate1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Variable Rate1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_VariableRate1Domain" xlink:href="tac-20191231.xsd#tac_VariableRate1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_VariableRate1Domain" xlink:to="lab_tac_VariableRate1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember_0bb49e0d-b680-49de-a127-7a1b8fd85a9c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposal groups classified as held for sale</link:label>
    <link:label id="lab_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember_label_en-US" xlink:label="lab_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposal groups classified as held for sale [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:to="lab_ifrs-full_DisposalGroupsClassifiedAsHeldForSaleMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_KentHillsWindFarmMember_6b355344-57bb-42cf-90e1-7d77413df07a_terseLabel_en-US" xlink:label="lab_tac_KentHillsWindFarmMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills wind farm</link:label>
    <link:label id="lab_tac_KentHillsWindFarmMember_label_en-US" xlink:label="lab_tac_KentHillsWindFarmMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills Wind Farm [Member]</link:label>
    <link:label id="lab_tac_KentHillsWindFarmMember_documentation_en-US" xlink:label="lab_tac_KentHillsWindFarmMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills Wind Farm [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_KentHillsWindFarmMember" xlink:href="tac-20191231.xsd#tac_KentHillsWindFarmMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_KentHillsWindFarmMember" xlink:to="lab_tac_KentHillsWindFarmMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_756a225e-7824-4f91-af3e-7cfcae80d8c5_terseLabel_en-US" xlink:label="lab_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retrospective application and retrospective restatement [axis]</link:label>
    <link:label id="lab_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_label_en-US" xlink:label="lab_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retrospective application and retrospective restatement [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:to="lab_ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember_7f3e370b-f040-48c8-8280-b2495f4773ee_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for business combinations [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for business combinations [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:to="lab_ifrs-full_EntitysTotalForBusinessCombinationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_e15c87e5-a02f-40d6-be10-53850bea62a8_terseLabel_en-US" xlink:label="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Characteristics of defined benefit plans [axis]</link:label>
    <link:label id="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis_label_en-US" xlink:label="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Characteristics of defined benefit plans [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:to="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_UseofLowerShortTermDiscountRate_6ece43eb-66a7-4fcd-b42c-43b7e110a767_terseLabel_en-US" xlink:label="lab_tac_UseofLowerShortTermDiscountRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Use of lower, short-term discount rate (in years)</link:label>
    <link:label id="lab_tac_UseofLowerShortTermDiscountRate_label_en-US" xlink:label="lab_tac_UseofLowerShortTermDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Use of Lower, Short-Term Discount Rate</link:label>
    <link:label id="lab_tac_UseofLowerShortTermDiscountRate_documentation_en-US" xlink:label="lab_tac_UseofLowerShortTermDiscountRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Use of Lower, Short-Term Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_UseofLowerShortTermDiscountRate" xlink:href="tac-20191231.xsd#tac_UseofLowerShortTermDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_UseofLowerShortTermDiscountRate" xlink:to="lab_tac_UseofLowerShortTermDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureoffinancialassetsandliabilitiesTable_51c05dd6-0d3e-4390-ba0d-a8c7c57e9c23_terseLabel_en-US" xlink:label="lab_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets and liabilities [Table]</link:label>
    <link:label id="lab_tac_DisclosureoffinancialassetsandliabilitiesTable_label_en-US" xlink:label="lab_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets and liabilities [Table]</link:label>
    <link:label id="lab_tac_DisclosureoffinancialassetsandliabilitiesTable_documentation_en-US" xlink:label="lab_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets and liabilities [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:href="tac-20191231.xsd#tac_DisclosureoffinancialassetsandliabilitiesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:to="lab_tac_DisclosureoffinancialassetsandliabilitiesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfHedgeAccountingLineItems_f40cbedb-fd26-4663-9eba-f922907a4c3c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfHedgeAccountingLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about hedges [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfHedgeAccountingLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfHedgeAccountingLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about hedges [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfHedgeAccountingLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems" xlink:to="lab_ifrs-full_DisclosureOfHedgeAccountingLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NoncurrentFinancialAssetsMember_a9a1a142-9e0e-4425-b964-19628058a0ef_terseLabel_en-US" xlink:label="lab_tac_NoncurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term</link:label>
    <link:label id="lab_tac_NoncurrentFinancialAssetsMember_ad527246-f330-4cbc-9eb9-df34dff2c229_verboseLabel_en-US" xlink:label="lab_tac_NoncurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term financial assets</link:label>
    <link:label id="lab_tac_NoncurrentFinancialAssetsMember_label_en-US" xlink:label="lab_tac_NoncurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncurrent Financial Assets [Member]</link:label>
    <link:label id="lab_tac_NoncurrentFinancialAssetsMember_documentation_en-US" xlink:label="lab_tac_NoncurrentFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncurrent Financial Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NoncurrentFinancialAssetsMember" xlink:href="tac-20191231.xsd#tac_NoncurrentFinancialAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NoncurrentFinancialAssetsMember" xlink:to="lab_tac_NoncurrentFinancialAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NewProvisionsOtherProvisions_473e1339-45f9-446f-9911-05cc9de1fcd7_terseLabel_en-US" xlink:label="lab_ifrs-full_NewProvisionsOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities incurred</link:label>
    <link:label id="lab_ifrs-full_NewProvisionsOtherProvisions_label_en-US" xlink:label="lab_ifrs-full_NewProvisionsOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New provisions, other provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewProvisionsOtherProvisions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NewProvisionsOtherProvisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NewProvisionsOtherProvisions" xlink:to="lab_ifrs-full_NewProvisionsOtherProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RiskManagementLiabilitiesMember_34c35788-a8d9-456b-9429-d6f51cfcfd01_terseLabel_en-US" xlink:label="lab_tac_RiskManagementLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management liabilities</link:label>
    <link:label id="lab_tac_RiskManagementLiabilitiesMember_label_en-US" xlink:label="lab_tac_RiskManagementLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk Management Liabilities [Member]</link:label>
    <link:label id="lab_tac_RiskManagementLiabilitiesMember_documentation_en-US" xlink:label="lab_tac_RiskManagementLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk Management Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RiskManagementLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_RiskManagementLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RiskManagementLiabilitiesMember" xlink:to="lab_tac_RiskManagementLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio_20790df6-fa1e-42ea-a61e-333f56970c34_terseLabel_en-US" xlink:label="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of preferred dividends deducted from Adjusted Comparable FFO to Adjusted Net Debt</link:label>
    <link:label id="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio_label_en-US" xlink:label="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of preferred dividends deducted from Adjusted Comparable Funds From Operations to Adjusted Net Debt Ratio</link:label>
    <link:label id="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio_documentation_en-US" xlink:label="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of preferred dividends deducted from Adjusted Comparable Funds From Operations to Adjusted Net Debt Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:href="tac-20191231.xsd#tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:to="lab_tac_PercentageofpreferreddividendsdeductedfromAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ActuarialAssumptionsMember_41f1c407-bc47-4aa0-8b74-8a71325d1ec2_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumptions [member]</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionsMember_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumptions [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ActuarialAssumptionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ActuarialAssumptionsMember" xlink:to="lab_ifrs-full_ActuarialAssumptionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_d537f654-d618-4009-ab7e-22d92501d8c7_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings (loss) attributable to:</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProfitLossAttributableToAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossAttributableToAbstract" xlink:to="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Inventories_30e5b78a-c82d-464c-ade5-7f89b40d1399_terseLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventory</link:label>
    <link:label id="lab_ifrs-full_Inventories_9d9918ae-5e03-4dda-bd0b-3b9681005bb1_totalLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_ifrs-full_Inventories_3be73f99-baf6-4772-a579-9f7ee4bc5890_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories at the beginning of the period</link:label>
    <link:label id="lab_ifrs-full_Inventories_deb926a3-d6a2-4c14-a140-69686d26c6e4_periodEndLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inventories at the end of the period</link:label>
    <link:label id="lab_ifrs-full_Inventories_label_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current inventories</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Inventories" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_Inventories"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Inventories" xlink:to="lab_ifrs-full_Inventories" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GainsLossesonContractAgreementNet_6cca5bfb-2632-4df4-8ebd-22b9abaac70f_terseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractAgreementNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta off-coal agreement, annual cash payments, net</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreementNet_label_en-US" xlink:label="lab_tac_GainsLossesonContractAgreementNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Agreement, Net</link:label>
    <link:label id="lab_tac_GainsLossesonContractAgreementNet_documentation_en-US" xlink:label="lab_tac_GainsLossesonContractAgreementNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Agreement, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GainsLossesonContractAgreementNet" xlink:href="tac-20191231.xsd#tac_GainsLossesonContractAgreementNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GainsLossesonContractAgreementNet" xlink:to="lab_tac_GainsLossesonContractAgreementNet" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AmountExercisedUnderLettersOfCredit_28102bdc-34dd-4535-8564-b0a947b39574_terseLabel_en-US" xlink:label="lab_tac_AmountExercisedUnderLettersOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount exercised under letters of credit</link:label>
    <link:label id="lab_tac_AmountExercisedUnderLettersOfCredit_label_en-US" xlink:label="lab_tac_AmountExercisedUnderLettersOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount Exercised Under Letters Of Credit</link:label>
    <link:label id="lab_tac_AmountExercisedUnderLettersOfCredit_documentation_en-US" xlink:label="lab_tac_AmountExercisedUnderLettersOfCredit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts Exercised Under Letters Of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AmountExercisedUnderLettersOfCredit" xlink:href="tac-20191231.xsd#tac_AmountExercisedUnderLettersOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AmountExercisedUnderLettersOfCredit" xlink:to="lab_tac_AmountExercisedUnderLettersOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ExecutiveOfficer1Member_21d6acac-bd64-47a5-9c48-84da878af1c6_terseLabel_en-US" xlink:label="lab_tac_ExecutiveOfficer1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive officers</link:label>
    <link:label id="lab_tac_ExecutiveOfficer1Member_label_en-US" xlink:label="lab_tac_ExecutiveOfficer1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive Officer1 [Member]</link:label>
    <link:label id="lab_tac_ExecutiveOfficer1Member_documentation_en-US" xlink:label="lab_tac_ExecutiveOfficer1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive Officer1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ExecutiveOfficer1Member" xlink:href="tac-20191231.xsd#tac_ExecutiveOfficer1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ExecutiveOfficer1Member" xlink:to="lab_tac_ExecutiveOfficer1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CommodityContractsMember_022156f8-c02d-4052-b979-17e92bba3ade_terseLabel_en-US" xlink:label="lab_tac_CommodityContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity contracts</link:label>
    <link:label id="lab_tac_CommodityContractsMember_label_en-US" xlink:label="lab_tac_CommodityContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Contracts [Member]</link:label>
    <link:label id="lab_tac_CommodityContractsMember_documentation_en-US" xlink:label="lab_tac_CommodityContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Contracts [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommodityContractsMember" xlink:href="tac-20191231.xsd#tac_CommodityContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CommodityContractsMember" xlink:to="lab_tac_CommodityContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_99dad6f4-6efa-426f-b4a2-cdd48d11fcf5_terseLabel_en-US" xlink:label="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Characteristics of benefit plans</link:label>
    <link:label id="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember_label_en-US" xlink:label="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Characteristics of defined benefit plans [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CharacteristicsOfDefinedBenefitPlansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:to="lab_ifrs-full_CharacteristicsOfDefinedBenefitPlansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons_d4394e1b-d601-4d0e-b198-a9dc1bf3d82c_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold In Gallons</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons_label_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold In Gallons</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Sold In Gallons</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountSoldInGallons"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:to="lab_tac_DerivativeNonmonetaryNotionalAmountSoldInGallons" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationExpense_62fd4d67-f3e5-421e-80c3-c3bc52de7da9_terseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mine depreciation</link:label>
    <link:label id="lab_ifrs-full_DepreciationExpense_label_en-US" xlink:label="lab_ifrs-full_DepreciationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DepreciationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationExpense" xlink:to="lab_ifrs-full_DepreciationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_dd84e97e-f662-4a7a-b7c9-16e456cb9bf8_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment [member]</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember" xlink:to="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_ComputerSoftwareMember_9675b53f-a861-47a4-9d2f-225d18fac1c1_verboseLabel_en-US" xlink:label="lab_ifrs-full_ComputerSoftwareMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Computer software</link:label>
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    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_8829db09-3ae5-4f87-a658-ca769ef1ab5a_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity participation percentage</link:label>
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    <link:label id="lab_dei_EntityEmergingGrowthCompany_21111fb9-bb00-429d-8c61-cc40df0e36d4_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
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    <link:label id="lab_tac_NaturalGasTransportationandOtherProductsandServicesMember_ab9ecc06-7b0b-4794-9286-3300d5d882ce_terseLabel_en-US" xlink:label="lab_tac_NaturalGasTransportationandOtherProductsandServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural gas, transportation and other contracts</link:label>
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    <link:label id="lab_tac_NaturalGasTransportationandOtherProductsandServicesMember_documentation_en-US" xlink:label="lab_tac_NaturalGasTransportationandOtherProductsandServicesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural Gas, Transportation and Other Products and Services [Member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDebtSecuritiesExplanatory_187a3631-9a0c-44b7-8f13-74adfd2211bb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDebtSecuritiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exchangeable Securities</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDebtSecuritiesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDebtSecuritiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of debt instruments [text block]</link:label>
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    <link:label id="lab_ifrs-full_RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod_d330ae11-257d-40d7-b8f0-64f220251b74_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts transferred to revenue included in opening balance</link:label>
    <link:label id="lab_ifrs-full_RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod_label_en-US" xlink:label="lab_ifrs-full_RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue that was included in contract liability balance at beginning of period</link:label>
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    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_addf9705-3535-4ddc-be14-51dbde5de412_verboseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, adjustment to interest rate basis</link:label>
    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_label_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, adjustment to interest rate basis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis"/>
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    <link:label id="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract_c1346236-a2cb-4ee6-8113-fdefa167de93_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares</link:label>
    <link:label id="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract_label_en-US" xlink:label="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of number of shares outstanding [abstract]</link:label>
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    <link:label id="lab_tac_Borrowings1Member_15dc1aec-872b-49fa-965a-7f9988a06e90_terseLabel_en-US" xlink:label="lab_tac_Borrowings1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_tac_Borrowings1Member_label_en-US" xlink:label="lab_tac_Borrowings1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings1 [Member]</link:label>
    <link:label id="lab_tac_Borrowings1Member_documentation_en-US" xlink:label="lab_tac_Borrowings1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Borrowings1Member" xlink:href="tac-20191231.xsd#tac_Borrowings1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Borrowings1Member" xlink:to="lab_tac_Borrowings1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CurrentFinancialLiabilitiesMember_0be22215-249f-488a-ae07-2acf865309ec_terseLabel_en-US" xlink:label="lab_tac_CurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current</link:label>
    <link:label id="lab_tac_CurrentFinancialLiabilitiesMember_5cf45473-3600-470d-b678-c4af9bf98866_verboseLabel_en-US" xlink:label="lab_tac_CurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current financial liabilities</link:label>
    <link:label id="lab_tac_CurrentFinancialLiabilitiesMember_label_en-US" xlink:label="lab_tac_CurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Financial Liabilities [Member]</link:label>
    <link:label id="lab_tac_CurrentFinancialLiabilitiesMember_documentation_en-US" xlink:label="lab_tac_CurrentFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Financial Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CurrentFinancialLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_CurrentFinancialLiabilitiesMember"/>
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    <link:label id="lab_tac_PropertyPlantAndEquipmentUsefulLife1_a787cdd6-d73c-45f6-87ea-90b44cef10a8_terseLabel_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentUsefulLife1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PP&amp;E useful life</link:label>
    <link:label id="lab_tac_PropertyPlantAndEquipmentUsefulLife1_label_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentUsefulLife1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, And Equipment Useful Life1</link:label>
    <link:label id="lab_tac_PropertyPlantAndEquipmentUsefulLife1_documentation_en-US" xlink:label="lab_tac_PropertyPlantAndEquipmentUsefulLife1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, And Equipment Useful Life1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PropertyPlantAndEquipmentUsefulLife1" xlink:href="tac-20191231.xsd#tac_PropertyPlantAndEquipmentUsefulLife1"/>
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    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsTable_6138544f-eda6-45f8-adea-02515b001ea0_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about financial instruments [table]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:to="lab_ifrs-full_DisclosureOfFinancialInstrumentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory_22594166-225e-4057-978e-5b2f82b69d88_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Financial Instruments</link:label>
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    <link:label id="lab_tac_LineOfCreditFacilityRemainingBorrowingCapacity1_fe6cea43-0201-42e5-8a0e-e3119a9044b0_terseLabel_en-US" xlink:label="lab_tac_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undrawn borrowing capacity under line of credit</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_LineOfCreditFacilityRemainingBorrowingCapacity1" xlink:href="tac-20191231.xsd#tac_LineOfCreditFacilityRemainingBorrowingCapacity1"/>
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    <link:label id="lab_tac_OtherFinancialLiabilitiesMember_183c64a1-5a89-47ed-b709-12f9b534fb82_terseLabel_en-US" xlink:label="lab_tac_OtherFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other financial liabilities</link:label>
    <link:label id="lab_tac_OtherFinancialLiabilitiesMember_label_en-US" xlink:label="lab_tac_OtherFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Liabilities [Member]</link:label>
    <link:label id="lab_tac_OtherFinancialLiabilitiesMember_documentation_en-US" xlink:label="lab_tac_OtherFinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherFinancialLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_OtherFinancialLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherFinancialLiabilitiesMember" xlink:to="lab_tac_OtherFinancialLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_e0d257e4-32b4-4ba5-aa76-c045d5ec0576_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in foreign exchange rates</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through net exchange differences, property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled_3748eaf1-fb4d-47c9-8d11-720977559acd_terseLabel_en-US" xlink:label="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decommissioning and restoration costs settled (Note 21)</link:label>
    <link:label id="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled_label_en-US" xlink:label="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments For Decommissioning And Restoration Costs Settled</link:label>
    <link:label id="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled_documentation_en-US" xlink:label="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments For Decommissioning And Restoration Costs Settled</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:href="tac-20191231.xsd#tac_AdjustmentsForDecommissioningAndRestorationCostsSettled"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:to="lab_tac_AdjustmentsForDecommissioningAndRestorationCostsSettled" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax_4caeaa36-cb72-46bf-8fef-1f08619ac6a1_terseLabel_en-US" xlink:label="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized gains included in earnings before income taxes relating to met assets held</link:label>
    <link:label id="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax_label_en-US" xlink:label="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized Gains (Losses) On Hedge Instruments, Before Tax</link:label>
    <link:label id="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax_documentation_en-US" xlink:label="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized Gains (Losses) On Hedge Instruments, Before Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:href="tac-20191231.xsd#tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:to="lab_tac_UnrealizedGainsLossesOnHedgeInstrumentsBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_86d1edf5-3f27-43fc-bddc-e269a8410163_totalLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsAtFairValue_label_en-US" xlink:label="lab_ifrs-full_PlanAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets, at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsAtFairValue" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PlanAssetsAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PlanAssetsAtFairValue" xlink:to="lab_ifrs-full_PlanAssetsAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GainsLossesonContractRestructuring_82cb1880-6a43-4766-a1a1-024cb445f4de_negatedTerseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractRestructuring" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mississauga cogeneration facility NUG Contract</link:label>
    <link:label id="lab_tac_GainsLossesonContractRestructuring_8ee4a50a-244d-4ab0-a73a-16c7ceaffd37_terseLabel_en-US" xlink:label="lab_tac_GainsLossesonContractRestructuring" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mississauga cogeneration facility NUG Contract</link:label>
    <link:label id="lab_tac_GainsLossesonContractRestructuring_label_en-US" xlink:label="lab_tac_GainsLossesonContractRestructuring" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Restructuring</link:label>
    <link:label id="lab_tac_GainsLossesonContractRestructuring_documentation_en-US" xlink:label="lab_tac_GainsLossesonContractRestructuring" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) on Contract Restructuring</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GainsLossesonContractRestructuring" xlink:href="tac-20191231.xsd#tac_GainsLossesonContractRestructuring"/>
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    <link:label id="lab_tac_TransAltaCentraliaGenerationLLCMember_76460822-1ea3-4e60-a085-1fb785ee3ae8_terseLabel_en-US" xlink:label="lab_tac_TransAltaCentraliaGenerationLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Centralia Generation, LLC [Member]</link:label>
    <link:label id="lab_tac_TransAltaCentraliaGenerationLLCMember_label_en-US" xlink:label="lab_tac_TransAltaCentraliaGenerationLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Centralia Generation, LLC [Member]</link:label>
    <link:label id="lab_tac_TransAltaCentraliaGenerationLLCMember_documentation_en-US" xlink:label="lab_tac_TransAltaCentraliaGenerationLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Centralia Generation, LLC [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransAltaCentraliaGenerationLLCMember" xlink:href="tac-20191231.xsd#tac_TransAltaCentraliaGenerationLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransAltaCentraliaGenerationLLCMember" xlink:to="lab_tac_TransAltaCentraliaGenerationLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PastDueStatusAxis_04cba8f0-cf8a-4b70-99f1-648c75fd79a1_terseLabel_en-US" xlink:label="lab_ifrs-full_PastDueStatusAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past due status [axis]</link:label>
    <link:label id="lab_ifrs-full_PastDueStatusAxis_label_en-US" xlink:label="lab_ifrs-full_PastDueStatusAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Past due status [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PastDueStatusAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PastDueStatusAxis" xlink:to="lab_ifrs-full_PastDueStatusAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TransferOfEquityFromNonControllingInterests_79731b17-fc80-45ec-bbd2-5a887499dfb8_terseLabel_en-US" xlink:label="lab_tac_TransferOfEquityFromNonControllingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer of equity from non-controlling interests</link:label>
    <link:label id="lab_tac_TransferOfEquityFromNonControllingInterests_label_en-US" xlink:label="lab_tac_TransferOfEquityFromNonControllingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Equity From Non-Controlling Interests</link:label>
    <link:label id="lab_tac_TransferOfEquityFromNonControllingInterests_documentation_en-US" xlink:label="lab_tac_TransferOfEquityFromNonControllingInterests" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfer Of Equity From Non-Controlling Interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransferOfEquityFromNonControllingInterests" xlink:href="tac-20191231.xsd#tac_TransferOfEquityFromNonControllingInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransferOfEquityFromNonControllingInterests" xlink:to="lab_tac_TransferOfEquityFromNonControllingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_ed3b2b01-4972-44ab-807e-a31dc3fee70a_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense (recovery)</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_23893ef8-18c5-4586-abf8-18804c0ec15a_totalLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense (recovery)</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax expense (income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:to="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HedgingLiabilitiesMember_c02ce26a-0da3-43d7-9454-e23c96efb5f4_terseLabel_en-US" xlink:label="lab_tac_HedgingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Liabilities</link:label>
    <link:label id="lab_tac_HedgingLiabilitiesMember_label_en-US" xlink:label="lab_tac_HedgingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Liabilities [Member]</link:label>
    <link:label id="lab_tac_HedgingLiabilitiesMember_documentation_en-US" xlink:label="lab_tac_HedgingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Liabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HedgingLiabilitiesMember" xlink:href="tac-20191231.xsd#tac_HedgingLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HedgingLiabilitiesMember" xlink:to="lab_tac_HedgingLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies_b475b52c-9ece-405e-8179-811fff515404_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance recoveries</link:label>
    <link:label id="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies_47689924-eb16-4157-ae76-c34839a6ed26_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Insurance recoveries</link:label>
    <link:label id="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies_label_en-US" xlink:label="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income from reimbursements under insurance policies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:to="lab_ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities_d516cc4b-c13f-4a09-b4df-795996775c86_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax shield on tax equity financing</link:label>
    <link:label id="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities_label_en-US" xlink:label="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Through Financing Tax Shield On Tax Equity, Liabilities Arising From Financing Activities</link:label>
    <link:label id="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) Through Financing Tax Shield On Tax Equity, Liabilities Arising From Financing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:to="lab_tac_IncreaseDecreaseThroughFinancingTaxShieldOnTaxEquityLiabilitiesArisingFromFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentDerivativeFinancialLiabilities_83311732-bdf4-4f71-8787-a50b309f3920_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management liabilities (Note 14 and 15)</link:label>
    <link:label id="lab_ifrs-full_NoncurrentDerivativeFinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_NoncurrentDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current derivative financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NoncurrentDerivativeFinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities" xlink:to="lab_ifrs-full_NoncurrentDerivativeFinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_58fcdff6-438d-4d3f-9fa9-63be76cf1571_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds on sale of property, plant and equipment</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_24310712-2355-46d7-ba27-0de26e13f1de_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on translating net assets of foreign operations,net of tax</link:label>
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    <link:label id="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnProfitLoss_4fa801d0-f452-4918-a172-4ac34d114550_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnProfitLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis, Net earnings increase (decrease)</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForProvisions_06c1a9e0-e3f5-4e68-a3e6-a1df474a362e_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions</link:label>
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    <link:label id="lab_currency_USD_2dade2f5-9180-4830-9a5b-f51faa13ce65_terseLabel_en-US" xlink:label="lab_currency_USD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">U.S. Dollars</link:label>
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    <link:label id="lab_tac_SheernessMember_15ab84d3-8d9f-4777-aede-52341cb99c42_terseLabel_en-US" xlink:label="lab_tac_SheernessMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sheerness</link:label>
    <link:label id="lab_tac_SheernessMember_label_en-US" xlink:label="lab_tac_SheernessMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sheerness [Member]</link:label>
    <link:label id="lab_tac_SheernessMember_documentation_en-US" xlink:label="lab_tac_SheernessMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sheerness [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SheernessMember" xlink:href="tac-20191231.xsd#tac_SheernessMember"/>
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    <link:label id="lab_ifrs-full_InterestPayable_86ad5052-9cc0-4be9-909c-2ac09c37818a_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest income on debt instruments held</link:label>
    <link:label id="lab_ifrs-full_InterestPayable_label_en-US" xlink:label="lab_ifrs-full_InterestPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest payable</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestPayable" xlink:to="lab_ifrs-full_InterestPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativesIncomeMember_56ea7295-146f-4cbf-87d8-81ab141fdf14_terseLabel_en-US" xlink:label="lab_tac_DerivativesIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivatives Income [Member]</link:label>
    <link:label id="lab_tac_DerivativesIncomeMember_label_en-US" xlink:label="lab_tac_DerivativesIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivatives Income [Member]</link:label>
    <link:label id="lab_tac_DerivativesIncomeMember_documentation_en-US" xlink:label="lab_tac_DerivativesIncomeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivatives Income [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativesIncomeMember" xlink:href="tac-20191231.xsd#tac_DerivativesIncomeMember"/>
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    <link:label id="lab_tac_PreferenceSharesBasisSpreadOnVariableRate_beeed674-d13e-4409-bb66-9bc7ef27f590_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate spread over Benchmark</link:label>
    <link:label id="lab_tac_PreferenceSharesBasisSpreadOnVariableRate_label_en-US" xlink:label="lab_tac_PreferenceSharesBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Basis Spread On Variable Rate</link:label>
    <link:label id="lab_tac_PreferenceSharesBasisSpreadOnVariableRate_documentation_en-US" xlink:label="lab_tac_PreferenceSharesBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Basis Spread On Variable Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PreferenceSharesBasisSpreadOnVariableRate" xlink:href="tac-20191231.xsd#tac_PreferenceSharesBasisSpreadOnVariableRate"/>
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    <link:label id="lab_ifrs-full_TerminationBenefitsExpense_422bfdbc-9465-4829-8674-e47e5f849f15_terseLabel_en-US" xlink:label="lab_ifrs-full_TerminationBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Termination benefits expense</link:label>
    <link:label id="lab_ifrs-full_TerminationBenefitsExpense_label_en-US" xlink:label="lab_ifrs-full_TerminationBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Termination benefits expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TerminationBenefitsExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TerminationBenefitsExpense"/>
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    <link:label id="lab_ifrs-full_DisclosureOfComparativeInformationPreparedUnderPreviousGAAPTable_ae048d10-6abc-44de-9b55-0cd97b8f3bef_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfComparativeInformationPreparedUnderPreviousGAAPTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of comparative information prepared under previous GAAP [table]</link:label>
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    <link:label id="lab_tac_TaxEffectOfProfitLossAttributableToNonControllingInterestNotSubjectToTax_d9bd9bf7-cfb8-4482-96a8-42a8d66693fb_terseLabel_en-US" xlink:label="lab_tac_TaxEffectOfProfitLossAttributableToNonControllingInterestNotSubjectToTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net earnings attributable to non-controlling interests not subject to tax</link:label>
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    <link:label id="lab_tac_NaturalGasPipelineCapacityVolume_60a02f27-e39c-49ac-8d1d-2e9d7b7be4f0_terseLabel_en-US" xlink:label="lab_tac_NaturalGasPipelineCapacityVolume" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural gas pipeline capacity (mmcf)</link:label>
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    <link:label id="lab_ifrs-full_GainsOnDisposalsOfNoncurrentAssets_ab5d1da0-ac22-42db-a4df-079ead1ff107_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsOnDisposalsOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on sale of assets and other (Note 4(D) and 17)</link:label>
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    <link:label id="lab_tac_NumberOfLegalDisputes_89a80c8c-4a57-498a-8ec7-1de5469d7526_terseLabel_en-US" xlink:label="lab_tac_NumberOfLegalDisputes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of legal disputes</link:label>
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    <link:label id="lab_tac_NumberOfLegalDisputes_documentation_en-US" xlink:label="lab_tac_NumberOfLegalDisputes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Legal Disputes</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForSubsidiariesMember_2e40909e-5896-4794-9f3b-8e8e00958bfd_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSubsidiariesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for subsidiaries [member]</link:label>
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    <link:label id="lab_ifrs-full_StatementOfChangesInEquityAbstract_530d21b9-a17d-41a4-98a9-08baf94e6e51_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [abstract]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_StatementOfChangesInEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="lab_ifrs-full_StatementOfChangesInEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions_e181418b-57ae-419b-9f70-b142ab3a0d19_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in discount rates, other provisions</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions_label_en-US" xlink:label="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Discount Rates, Other Provisions</link:label>
    <link:label id="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Discount Rates, Other Provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseinDiscountRatesOtherProvisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:to="lab_tac_IncreaseDecreaseinDiscountRatesOtherProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProductsAndServicesAxis_11f38016-10f0-4194-a392-8bc334d83b42_terseLabel_en-US" xlink:label="lab_ifrs-full_ProductsAndServicesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Products and services [axis]</link:label>
    <link:label id="lab_ifrs-full_ProductsAndServicesAxis_label_en-US" xlink:label="lab_ifrs-full_ProductsAndServicesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Products and services [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProductsAndServicesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProductsAndServicesAxis" xlink:to="lab_ifrs-full_ProductsAndServicesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets_0b64c2f3-c656-48ba-ba24-14d3599b809f_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity securities</link:label>
    <link:label id="lab_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets_label_en-US" xlink:label="lab_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity instruments, amount contributed to fair value of plan assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets" xlink:to="lab_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_A5.33NonRecourseDebenturesDue2015Member_991032d6-4fa2-431e-be1b-36cd504a15f4_terseLabel_en-US" xlink:label="lab_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.33% Non-Recourse Debentures Due 2015</link:label>
    <link:label id="lab_tac_A5.33NonRecourseDebenturesDue2015Member_label_en-US" xlink:label="lab_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.33% Non-Recourse Debentures Due 2015 [Member]</link:label>
    <link:label id="lab_tac_A5.33NonRecourseDebenturesDue2015Member_documentation_en-US" xlink:label="lab_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.33% Non-Recourse Debentures Due 2015 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:href="tac-20191231.xsd#tac_A5.33NonRecourseDebenturesDue2015Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:to="lab_tac_A5.33NonRecourseDebenturesDue2015Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember_68ddd6b8-7ab9-40d4-bed8-d5d5a0e13478_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Debt [Member]</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember_label_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Debt [Member]</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember_documentation_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:href="tac-20191231.xsd#tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:to="lab_tac_ForeignExchangeForwardContractsForeignDenominatedDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_2eb111ed-901d-4cb6-9de7-9f001e64a03c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, and Equipment</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of property, plant and equipment [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DerivativeFinancialLiabilities_2d9f7081-fbef-4d93-a417-156c09138a07_terseLabel_en-US" xlink:label="lab_ifrs-full_DerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative financial liabilities</link:label>
    <link:label id="lab_ifrs-full_DerivativeFinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_DerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DerivativeFinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DerivativeFinancialLiabilities" xlink:to="lab_ifrs-full_DerivativeFinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ForeignCountriesMember_7f84e477-80b7-4431-b831-54226cf437c2_terseLabel_en-US" xlink:label="lab_ifrs-full_ForeignCountriesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign countries</link:label>
    <link:label id="lab_ifrs-full_ForeignCountriesMember_label_en-US" xlink:label="lab_ifrs-full_ForeignCountriesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign countries [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ForeignCountriesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ForeignCountriesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ForeignCountriesMember" xlink:to="lab_ifrs-full_ForeignCountriesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansMember_0eeb0718-355c-41ee-aee7-d29130b73b01_verboseLabel_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansMember_5511764d-5880-4358-88b6-69bb43d18aa9_netLabel_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansMember" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, through 2027</link:label>
    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansMember_label_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Post-Employment Benefit Plans [Member]</link:label>
    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansMember_documentation_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Post-Employment Benefit Plans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherPostEmploymentBenefitPlansMember" xlink:href="tac-20191231.xsd#tac_OtherPostEmploymentBenefitPlansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherPostEmploymentBenefitPlansMember" xlink:to="lab_tac_OtherPostEmploymentBenefitPlansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest_3597b2f4-64e8-4451-b341-a0860d76bce9_terseLabel_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued and unpaid interest</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest_label_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings, Accrued Interest</link:label>
    <link:label id="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest_documentation_en-US" xlink:label="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Redemption of Noncurrent Borrowings, Accrued Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:href="tac-20191231.xsd#tac_RedemptionofNoncurrentBorrowingsAccruedInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:to="lab_tac_RedemptionofNoncurrentBorrowingsAccruedInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember_93936287-acf9-40c5-9efa-2fcf03a2c852_terseLabel_en-US" xlink:label="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation</link:label>
    <link:label id="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember_b05fdfa9-2fe4-418c-bc14-67848a57b62a_verboseLabel_en-US" xlink:label="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Present value of defined benefit obligation</link:label>
    <link:label id="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember_label_en-US" xlink:label="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Present value of defined benefit obligation [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PresentValueOfDefinedBenefitObligationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:to="lab_ifrs-full_PresentValueOfDefinedBenefitObligationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LongTermPowerSaleU.S.Member_89802ce0-18a9-46e6-a675-7893ad9a6114_terseLabel_en-US" xlink:label="lab_tac_LongTermPowerSaleU.S.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term power sale &#8211; US</link:label>
    <link:label id="lab_tac_LongTermPowerSaleU.S.Member_label_en-US" xlink:label="lab_tac_LongTermPowerSaleU.S.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Power Sale - U.S. [Member]</link:label>
    <link:label id="lab_tac_LongTermPowerSaleU.S.Member_documentation_en-US" xlink:label="lab_tac_LongTermPowerSaleU.S.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Power Sale - U.S. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongTermPowerSaleU.S.Member" xlink:href="tac-20191231.xsd#tac_LongTermPowerSaleU.S.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LongTermPowerSaleU.S.Member" xlink:to="lab_tac_LongTermPowerSaleU.S.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityTable_29397191-c791-4aa3-b9ac-24c61c071c4e_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [table]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityTable_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable" xlink:to="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CentraliaPlantCGUMember_2fc8402f-6ca3-4596-adcb-6c921b8b32a3_terseLabel_en-US" xlink:label="lab_tac_CentraliaPlantCGUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Centralia Plant CGU</link:label>
    <link:label id="lab_tac_CentraliaPlantCGUMember_label_en-US" xlink:label="lab_tac_CentraliaPlantCGUMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Centralia Plant CGU [Member]</link:label>
    <link:label id="lab_tac_CentraliaPlantCGUMember_documentation_en-US" xlink:label="lab_tac_CentraliaPlantCGUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Centralia Plant CGU</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CentraliaPlantCGUMember" xlink:href="tac-20191231.xsd#tac_CentraliaPlantCGUMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CentraliaPlantCGUMember" xlink:to="lab_tac_CentraliaPlantCGUMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CounterpartiesAxis_921fe126-94dd-4769-949d-c5b32e5c3557_terseLabel_en-US" xlink:label="lab_ifrs-full_CounterpartiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparties [axis]</link:label>
    <link:label id="lab_ifrs-full_CounterpartiesAxis_label_en-US" xlink:label="lab_ifrs-full_CounterpartiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparties [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CounterpartiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CounterpartiesAxis" xlink:to="lab_ifrs-full_CounterpartiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Capital1_b853dbaa-024f-4550-bde3-9200a18d5581_totalLabel_en-US" xlink:label="lab_tac_Capital1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total capital</link:label>
    <link:label id="lab_tac_Capital1_label_en-US" xlink:label="lab_tac_Capital1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital1</link:label>
    <link:label id="lab_tac_Capital1_documentation_en-US" xlink:label="lab_tac_Capital1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Capital1" xlink:href="tac-20191231.xsd#tac_Capital1"/>
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    <link:label id="lab_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling_c5eff57b-343d-4a16-a2b1-4069e544965d_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial gain (loss) arising from experience adjustments</link:label>
    <link:label id="lab_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling_label_en-US" xlink:label="lab_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on changes in effect of limiting net defined benefit asset to asset ceiling excluding interest income or expense, net defined benefit liability (asset)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling"/>
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    <link:label id="lab_ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory_517273f6-8d7e-4ff7-b3ea-a83d9a5625b9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Impairment Charges and Reversals</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment of assets [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfImpairmentOfAssetsExplanatory"/>
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    <link:label id="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_8c766416-93af-4101-9d13-4e91578df80c_terseLabel_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiaries [axis]</link:label>
    <link:label id="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_label_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiaries [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SundanceUnit5Member_a06b99ce-ae18-4063-99d1-14287ff9200e_terseLabel_en-US" xlink:label="lab_tac_SundanceUnit5Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 5</link:label>
    <link:label id="lab_tac_SundanceUnit5Member_label_en-US" xlink:label="lab_tac_SundanceUnit5Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 5 [Member]</link:label>
    <link:label id="lab_tac_SundanceUnit5Member_documentation_en-US" xlink:label="lab_tac_SundanceUnit5Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 5 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SundanceUnit5Member" xlink:href="tac-20191231.xsd#tac_SundanceUnit5Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SundanceUnit5Member" xlink:to="lab_tac_SundanceUnit5Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CoalGenerationMember_7d98c700-7569-468f-b27e-e303498c29fc_terseLabel_en-US" xlink:label="lab_tac_CoalGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal generation</link:label>
    <link:label id="lab_tac_CoalGenerationMember_label_en-US" xlink:label="lab_tac_CoalGenerationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal Generation [Member]</link:label>
    <link:label id="lab_tac_CoalGenerationMember_documentation_en-US" xlink:label="lab_tac_CoalGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal Generation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CoalGenerationMember" xlink:href="tac-20191231.xsd#tac_CoalGenerationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CoalGenerationMember" xlink:to="lab_tac_CoalGenerationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime_d0cc2a8d-7af6-4613-b8e2-0f1d0c8b8295_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accretion of provisions (Note 21)</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for increase in other provisions arising from passage of time</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime" xlink:to="lab_ifrs-full_AdjustmentsForIncreaseInOtherProvisionsArisingFromPassageOfTime" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment_5a2b1099-9eb7-4191-8ff9-d76e9cacb934_terseLabel_en-US" xlink:label="lab_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on disposal of property, plant, and equipment</link:label>
    <link:label id="lab_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Losses on disposals of property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_LossesOnDisposalsOfPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NonrecurringFairValueMeasurementMember_4a2da642-2965-4138-ba19-ebe3753cc0c1_terseLabel_en-US" xlink:label="lab_ifrs-full_NonrecurringFairValueMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-recurring fair value measurement [member]</link:label>
    <link:label id="lab_ifrs-full_NonrecurringFairValueMeasurementMember_label_en-US" xlink:label="lab_ifrs-full_NonrecurringFairValueMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-recurring fair value measurement [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonrecurringFairValueMeasurementMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NonrecurringFairValueMeasurementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NonrecurringFairValueMeasurementMember" xlink:to="lab_ifrs-full_NonrecurringFairValueMeasurementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid_a35ec8da-0f75-4f0b-9d2b-adbfbf653bb6_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss on redemption of bonds (Note 23)</link:label>
    <link:label id="lab_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid_label_en-US" xlink:label="lab_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) arising from difference between carrying amount of financial liability extinguished and consideration paid</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid" xlink:to="lab_ifrs-full_GainLossArisingFromDifferenceBetweenCarryingAmountOfFinancialLiabilityExtinguishedAndConsiderationPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FortescueRiverGasPipelineMember_1cdfb661-a465-434d-8b6e-c30b3c29570a_terseLabel_en-US" xlink:label="lab_tac_FortescueRiverGasPipelineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue River Gas Pipeline</link:label>
    <link:label id="lab_tac_FortescueRiverGasPipelineMember_label_en-US" xlink:label="lab_tac_FortescueRiverGasPipelineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue River Gas Pipeline [Member]</link:label>
    <link:label id="lab_tac_FortescueRiverGasPipelineMember_documentation_en-US" xlink:label="lab_tac_FortescueRiverGasPipelineMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fortescue River Gas Pipeline [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FortescueRiverGasPipelineMember" xlink:href="tac-20191231.xsd#tac_FortescueRiverGasPipelineMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FortescueRiverGasPipelineMember" xlink:to="lab_tac_FortescueRiverGasPipelineMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory_bda41857-1066-4f13-9b70-c728ba6fcc49_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Changes</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting policies [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfChangesInAccountingPoliciesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_96b083fd-f6e1-47ff-9023-5e8b33d2ae9c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value of plan assets [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value of plan assets [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:to="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PerformanceShareUnitPSUMember_f3bd8df2-4a1c-4e9e-badb-ec982c5d2790_terseLabel_en-US" xlink:label="lab_tac_PerformanceShareUnitPSUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PSUs</link:label>
    <link:label id="lab_tac_PerformanceShareUnitPSUMember_label_en-US" xlink:label="lab_tac_PerformanceShareUnitPSUMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Unit (PSU) [Member]</link:label>
    <link:label id="lab_tac_PerformanceShareUnitPSUMember_documentation_en-US" xlink:label="lab_tac_PerformanceShareUnitPSUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Unit (PSU) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PerformanceShareUnitPSUMember" xlink:href="tac-20191231.xsd#tac_PerformanceShareUnitPSUMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PerformanceShareUnitPSUMember" xlink:to="lab_tac_PerformanceShareUnitPSUMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement_cdf6fc35-0529-4a40-948c-b2e29de9acb2_terseLabel_en-US" xlink:label="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, contingent feature, additional collateral requirement</link:label>
    <link:label id="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement_label_en-US" xlink:label="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instrument, Contingent Feature, Increase in Collateral Requirement</link:label>
    <link:label id="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement_documentation_en-US" xlink:label="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instrument, Contingent Feature, Increase in Collateral Requirement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:href="tac-20191231.xsd#tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:to="lab_tac_DerivativeInstrumentContingentFeatureIncreaseinCollateralRequirement" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill_96477310-bdb1-4295-9ab2-f671119233a7_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in foreign exchange rates</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through net exchange differences, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill"/>
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    <link:label id="lab_ifrs-full_DisclosureOfContingentLiabilitiesLineItems_107a8962-bf84-4889-87e3-e5753766c2d5_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of contingent liabilities [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfContingentLiabilitiesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of contingent liabilities [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfContingentLiabilitiesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:to="lab_ifrs-full_DisclosureOfContingentLiabilitiesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofimpairmentofassetsAbstract_a7cc53b5-8a2c-44df-91a4-fcf04ea041cb_terseLabel_en-US" xlink:label="lab_tac_DisclosureofimpairmentofassetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment of assets [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofimpairmentofassetsAbstract_label_en-US" xlink:label="lab_tac_DisclosureofimpairmentofassetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment of assets [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofimpairmentofassetsAbstract_documentation_en-US" xlink:label="lab_tac_DisclosureofimpairmentofassetsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of impairment of assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofimpairmentofassetsAbstract" xlink:href="tac-20191231.xsd#tac_DisclosureofimpairmentofassetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofimpairmentofassetsAbstract" xlink:to="lab_tac_DisclosureofimpairmentofassetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract_320a21b7-ffa3-44ee-939a-67a3dce7a0a7_terseLabel_en-US" xlink:label="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting policies, accounting estimates and errors [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract_label_en-US" xlink:label="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting policies, accounting estimates and errors [Abstract]</link:label>
    <link:label id="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract_documentation_en-US" xlink:label="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in accounting policies, accounting estimates and errors [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:href="tac-20191231.xsd#tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:to="lab_tac_DisclosureofchangesinaccountingpoliciesaccountingestimatesanderrorsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_494b9b29-f6a9-46fc-9dc8-bdf79fc3f3e9_terseLabel_en-US" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Salaries and benefits(1)</link:label>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_235534d9-c709-447e-afe8-173034974e4e_totalLabel_en-US" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net expense</link:label>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_label_en-US" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee benefits expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EmployeeBenefitsExpense" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EmployeeBenefitsExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EmployeeBenefitsExpense" xlink:to="lab_ifrs-full_EmployeeBenefitsExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AggregatedTimeBandsMember_2e624b81-8396-476a-805c-dc171543409d_terseLabel_en-US" xlink:label="lab_ifrs-full_AggregatedTimeBandsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated time bands [member]</link:label>
    <link:label id="lab_ifrs-full_AggregatedTimeBandsMember_label_en-US" xlink:label="lab_ifrs-full_AggregatedTimeBandsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated time bands [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember" xlink:to="lab_ifrs-full_AggregatedTimeBandsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccrualsClassifiedAsNoncurrent_3a62d8e4-39b1-4be3-969f-35321a31c78c_terseLabel_en-US" xlink:label="lab_ifrs-full_AccrualsClassifiedAsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term incentive accruals (Note 27)</link:label>
    <link:label id="lab_ifrs-full_AccrualsClassifiedAsNoncurrent_label_en-US" xlink:label="lab_ifrs-full_AccrualsClassifiedAsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accruals classified as non-current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccrualsClassifiedAsNoncurrent" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AccrualsClassifiedAsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccrualsClassifiedAsNoncurrent" xlink:to="lab_ifrs-full_AccrualsClassifiedAsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AssetAcquisitionAssetsOther_fa3f29aa-8a99-497d-a104-e19298e1bc5f_terseLabel_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_tac_AssetAcquisitionAssetsOther_label_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Assets, Other</link:label>
    <link:label id="lab_tac_AssetAcquisitionAssetsOther_documentation_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Assets, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AssetAcquisitionAssetsOther" xlink:href="tac-20191231.xsd#tac_AssetAcquisitionAssetsOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AssetAcquisitionAssetsOther" xlink:to="lab_tac_AssetAcquisitionAssetsOther" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofCommitmentsTable_a3e1b706-83eb-45d2-b09b-283dca04f19c_terseLabel_en-US" xlink:label="lab_tac_DisclosureofCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Commitments [Table]</link:label>
    <link:label id="lab_tac_DisclosureofCommitmentsTable_label_en-US" xlink:label="lab_tac_DisclosureofCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Commitments [Table]</link:label>
    <link:label id="lab_tac_DisclosureofCommitmentsTable_documentation_en-US" xlink:label="lab_tac_DisclosureofCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Commitments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofCommitmentsTable" xlink:href="tac-20191231.xsd#tac_DisclosureofCommitmentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofCommitmentsTable" xlink:to="lab_tac_DisclosureofCommitmentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RightOfUseAssetsTransfer_4d76453b-bbd1-449e-879f-17fa9edcbd31_terseLabel_en-US" xlink:label="lab_tac_RightOfUseAssetsTransfer" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-Of-Use Assets, Transfer</link:label>
    <link:label id="lab_tac_RightOfUseAssetsTransfer_label_en-US" xlink:label="lab_tac_RightOfUseAssetsTransfer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-Of-Use Assets, Transfer</link:label>
    <link:label id="lab_tac_RightOfUseAssetsTransfer_documentation_en-US" xlink:label="lab_tac_RightOfUseAssetsTransfer" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-Of-Use Assets, Transfer</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RightOfUseAssetsTransfer" xlink:href="tac-20191231.xsd#tac_RightOfUseAssetsTransfer"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RightOfUseAssetsTransfer" xlink:to="lab_tac_RightOfUseAssetsTransfer" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock_914cd13d-e458-4b9b-bad4-5675167b2e31_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of The Change In Inventory</link:label>
    <link:label id="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of The Change In Inventory [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of The Change In Inventory [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureOfTheChangeInInventoryTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:to="lab_tac_DisclosureOfTheChangeInInventoryTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsTable_cdb44520-fab4-43ab-ad34-f862e6d58035_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherProvisionsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherProvisionsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other provisions [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="lab_ifrs-full_DisclosureOfOtherProvisionsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrencySwapContractMember_80261582-5fec-4c3c-84af-3ffeac31b840_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrencySwapContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency swap contract [member]</link:label>
    <link:label id="lab_ifrs-full_CurrencySwapContractMember_label_en-US" xlink:label="lab_ifrs-full_CurrencySwapContractMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency swap contract [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrencySwapContractMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrencySwapContractMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrencySwapContractMember" xlink:to="lab_ifrs-full_CurrencySwapContractMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HeatingOil1Member_6c672f46-78df-4241-961d-9b9bb6ded9a6_terseLabel_en-US" xlink:label="lab_tac_HeatingOil1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Heating Oil</link:label>
    <link:label id="lab_tac_HeatingOil1Member_label_en-US" xlink:label="lab_tac_HeatingOil1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Heating Oil1 [Member]</link:label>
    <link:label id="lab_tac_HeatingOil1Member_documentation_en-US" xlink:label="lab_tac_HeatingOil1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Heating Oil [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HeatingOil1Member" xlink:href="tac-20191231.xsd#tac_HeatingOil1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HeatingOil1Member" xlink:to="lab_tac_HeatingOil1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_f19f4e55-b34b-41d0-860a-740396bce93d_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of related parties [axis]</link:label>
    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_label_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Categories of related parties [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="lab_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SensitivityAnalysisForBaseFairValueReasonablyPossibleChangeInFairValueImpactOnPreTaxEarnings_6534608c-4945-4ce4-9f86-b27fed55bfda_terseLabel_en-US" xlink:label="lab_tac_SensitivityAnalysisForBaseFairValueReasonablyPossibleChangeInFairValueImpactOnPreTaxEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease in sensitivity values</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofCommitmentsByCommitmentTableTextBlock" xlink:to="lab_tac_DisclosureofCommitmentsByCommitmentTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NotLaterThanOneYearMember_8bb0a3ce-799f-4e78-a478-7624ee8936f6_terseLabel_en-US" xlink:label="lab_ifrs-full_NotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Within one year</link:label>
    <link:label id="lab_ifrs-full_NotLaterThanOneYearMember_819a28e8-d083-444b-a1e5-b0eac4ebdaa4_verboseLabel_en-US" xlink:label="lab_ifrs-full_NotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2020</link:label>
    <link:label id="lab_ifrs-full_NotLaterThanOneYearMember_label_en-US" xlink:label="lab_ifrs-full_NotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not later than one year [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NotLaterThanOneYearMember" xlink:to="lab_ifrs-full_NotLaterThanOneYearMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties_ca64c8ff-efed-46ae-b411-b95aaee8108d_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount receivable from employees</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables due from related parties</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:to="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestCostsIncurred_c26e1ff6-8dab-4417-836c-a3e533ee7492_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestCostsIncurred" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest on debt</link:label>
    <link:label id="lab_ifrs-full_InterestCostsIncurred_label_en-US" xlink:label="lab_ifrs-full_InterestCostsIncurred" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest costs incurred</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestCostsIncurred" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestCostsIncurred"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestCostsIncurred" xlink:to="lab_ifrs-full_InterestCostsIncurred" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PreferenceSharesMember_6aafe1d1-d480-41b4-b724-c535b16c0e8a_terseLabel_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares</link:label>
    <link:label id="lab_ifrs-full_PreferenceSharesMember_78c9b0c6-2f93-4892-8957-5d7b887d41c4_verboseLabel_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Shares</link:label>
    <link:label id="lab_ifrs-full_PreferenceSharesMember_label_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference shares [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PreferenceSharesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PreferenceSharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PreferenceSharesMember" xlink:to="lab_ifrs-full_PreferenceSharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PioneerPipelineMember_a03f528c-a9aa-4e6b-b668-67069a5847b9_terseLabel_en-US" xlink:label="lab_tac_PioneerPipelineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pioneer Pipeline</link:label>
    <link:label id="lab_tac_PioneerPipelineMember_label_en-US" xlink:label="lab_tac_PioneerPipelineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pioneer Pipeline [Member]</link:label>
    <link:label id="lab_tac_PioneerPipelineMember_documentation_en-US" xlink:label="lab_tac_PioneerPipelineMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pioneer Pipeline</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PioneerPipelineMember" xlink:href="tac-20191231.xsd#tac_PioneerPipelineMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PioneerPipelineMember" xlink:to="lab_tac_PioneerPipelineMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RelatedPartiesMember_752e3bc0-216a-4f58-a717-55c7ca97a085_terseLabel_en-US" xlink:label="lab_ifrs-full_RelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related parties [member]</link:label>
    <link:label id="lab_ifrs-full_RelatedPartiesMember_label_en-US" xlink:label="lab_ifrs-full_RelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related parties [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RelatedPartiesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RelatedPartiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RelatedPartiesMember" xlink:to="lab_ifrs-full_RelatedPartiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems_0852e946-8692-4f9e-be67-9c03ec593aa3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of liabilities [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement of liabilities [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="lab_ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ContractLiabilities_62d3c9da-747c-431d-aef0-97f5a2d712a2_terseLabel_en-US" xlink:label="lab_ifrs-full_ContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract liabilities (Note 5)</link:label>
    <link:label id="lab_ifrs-full_ContractLiabilities_ed0e2db4-6f45-46d4-910d-e02b1f64dbce_verboseLabel_en-US" xlink:label="lab_ifrs-full_ContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract liabilities</link:label>
    <link:label id="lab_ifrs-full_ContractLiabilities_73730916-535d-4a30-8c11-b38c77ff032c_periodStartLabel_en-US" xlink:label="lab_ifrs-full_ContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract liabilities at beginning of period</link:label>
    <link:label id="lab_ifrs-full_ContractLiabilities_25f31840-3928-4581-af9a-df4d446c2c72_periodEndLabel_en-US" xlink:label="lab_ifrs-full_ContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract liabilities at end of period</link:label>
    <link:label id="lab_ifrs-full_ContractLiabilities_label_en-US" xlink:label="lab_ifrs-full_ContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ContractLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContractLiabilities" xlink:to="lab_ifrs-full_ContractLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_6bc48be4-71aa-4d3a-b052-70e7502dad60_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfInvestmentPropertyAxis_05f5fd5b-6029-4933-8a20-09166453f483_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfInvestmentPropertyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of investment property [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfInvestmentPropertyAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfInvestmentPropertyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of investment property [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInvestmentPropertyAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfInvestmentPropertyAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfInvestmentPropertyAxis" xlink:to="lab_ifrs-full_TypesOfInvestmentPropertyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LongtermBorrowingsMember_0de5c4a4-4012-4d1b-9397-8c7e76a6406d_terseLabel_en-US" xlink:label="lab_ifrs-full_LongtermBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt and lease obligations</link:label>
    <link:label id="lab_ifrs-full_LongtermBorrowingsMember_label_en-US" xlink:label="lab_ifrs-full_LongtermBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term borrowings [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowingsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LongtermBorrowingsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LongtermBorrowingsMember" xlink:to="lab_ifrs-full_LongtermBorrowingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PreferenceSharesSeriesGMember_acabb2c3-ace9-4c36-b627-18a2245a372a_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesSeriesGMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series&#160;G</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesGMember_label_en-US" xlink:label="lab_tac_PreferenceSharesSeriesGMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series G [Member]</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesGMember_documentation_en-US" xlink:label="lab_tac_PreferenceSharesSeriesGMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series G [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PreferenceSharesSeriesGMember" xlink:href="tac-20191231.xsd#tac_PreferenceSharesSeriesGMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PreferenceSharesSeriesGMember" xlink:to="lab_tac_PreferenceSharesSeriesGMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock_048b6bbb-7c0f-48a4-a955-985540eec5e5_terseLabel_en-US" xlink:label="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components in other non-current assets</link:label>
    <link:label id="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Components in Other Non-current Assets [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Components in Other Non-current Assets [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:to="lab_tac_DisclosureofComponentsinOtherNoncurrentAssetsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_bbbe581f-3d45-40b2-b452-e53e55ebfd26_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_57d01596-b855-436d-99d0-2e8b80390837_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total other assets</link:label>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherNoncurrentAssets" xlink:to="lab_ifrs-full_OtherNoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_25ab64f3-5279-4341-ac30-412ee9261b04_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiaries [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiaries [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:to="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_invest_InvestmentAxis_b87022e8-91a8-43a9-adfb-dc054ced194b_terseLabel_en-US" xlink:label="lab_invest_InvestmentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Axis]</link:label>
    <link:label id="lab_invest_InvestmentAxis_label_en-US" xlink:label="lab_invest_InvestmentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Axis]</link:label>
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    <link:label id="lab_ifrs-full_OtherCashAndCashEquivalents_32123f22-c4b8-4a07-a6db-06ddea016fae_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_OtherCashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_OtherCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other cash and cash equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCashAndCashEquivalents" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherCashAndCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherCashAndCashEquivalents" xlink:to="lab_ifrs-full_OtherCashAndCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ChangesInEquity_b0dc82e6-ce89-4253-beee-e0c22feb6e91_terseLabel_en-US" xlink:label="lab_ifrs-full_ChangesInEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in equity</link:label>
    <link:label id="lab_ifrs-full_ChangesInEquity_label_en-US" xlink:label="lab_ifrs-full_ChangesInEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInEquity" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ChangesInEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ChangesInEquity" xlink:to="lab_ifrs-full_ChangesInEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfDiscountRatesMember_55e158f1-6f0a-43d5-afc1-eb4e95b58980_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">1% decrease in the discount rate</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfDiscountRatesMember_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumption of discount rates [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfDiscountRatesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ActuarialAssumptionOfDiscountRatesMember"/>
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    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour_6f297412-366d-4bbd-b93d-31002a7ceb53_terseLabel_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount purchased</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour_label_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Purchased, Emissions Per Hour</link:label>
    <link:label id="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour_documentation_en-US" xlink:label="lab_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Nonmonetary Notional Amount Purchased, Emissions Per Hour</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour" xlink:href="tac-20191231.xsd#tac_DerivativeNonmonetaryNotionalAmountPurchasedEmissionsPerHour"/>
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    <link:label id="lab_tac_HedgingDesignation1Member_86bdce62-4a2f-4511-8907-14547f73f95f_terseLabel_en-US" xlink:label="lab_tac_HedgingDesignation1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation [Member]</link:label>
    <link:label id="lab_tac_HedgingDesignation1Member_label_en-US" xlink:label="lab_tac_HedgingDesignation1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation 1 [Member]</link:label>
    <link:label id="lab_tac_HedgingDesignation1Member_documentation_en-US" xlink:label="lab_tac_HedgingDesignation1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging Designation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HedgingDesignation1Member" xlink:href="tac-20191231.xsd#tac_HedgingDesignation1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HedgingDesignation1Member" xlink:to="lab_tac_HedgingDesignation1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets_b6ffc4b1-5ca0-45ab-8366-00f7b067a1e8_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in foreign exchange rates</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through foreign exchange, financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_4bc9309b-eb86-4f16-b96a-51b27bc5ce13_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of quantitative information about right-of-use assets [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of quantitative information about right-of-use assets [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Scenario1Domain_e8eb3a56-19f0-4690-bdff-245945f3d4fa_terseLabel_en-US" xlink:label="lab_tac_Scenario1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario1 [Domain]</link:label>
    <link:label id="lab_tac_Scenario1Domain_label_en-US" xlink:label="lab_tac_Scenario1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario1 [Domain]</link:label>
    <link:label id="lab_tac_Scenario1Domain_documentation_en-US" xlink:label="lab_tac_Scenario1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Scenario1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Scenario1Domain" xlink:href="tac-20191231.xsd#tac_Scenario1Domain"/>
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    <link:label id="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives_b3e25c78-9758-4cd7-b899-8c8be33630ad_terseLabel_en-US" xlink:label="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealised Gains On Change In Fair Value Of Derivatives</link:label>
    <link:label id="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives_label_en-US" xlink:label="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealised Gains On Change In Fair Value Of Derivatives</link:label>
    <link:label id="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives_documentation_en-US" xlink:label="lab_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealised Gains On Change In Fair Value Of Derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_UnrealisedGainsOnChangeInFairValueOfDerivatives" xlink:href="tac-20191231.xsd#tac_UnrealisedGainsOnChangeInFairValueOfDerivatives"/>
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    <link:label id="lab_tac_SupplementalPensionPlanMember_872e0bbd-be89-4e6c-9a1d-0b3d5ba2e5de_verboseLabel_en-US" xlink:label="lab_tac_SupplementalPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Supplemental Pension Plan</link:label>
    <link:label id="lab_tac_SupplementalPensionPlanMember_label_en-US" xlink:label="lab_tac_SupplementalPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Supplemental Pension Plan [Member]</link:label>
    <link:label id="lab_tac_SupplementalPensionPlanMember_documentation_en-US" xlink:label="lab_tac_SupplementalPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Supplemental Pension Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SupplementalPensionPlanMember" xlink:href="tac-20191231.xsd#tac_SupplementalPensionPlanMember"/>
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    <link:label id="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities_fd1dc652-8968-4c69-b7a4-d486f0b72789_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense relating to variable lease payments not included in measurement of lease liabilities</link:label>
    <link:label id="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense relating to variable lease payments not included in measurement of lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:to="lab_ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfOrdinarySharesAxis_2f25ab65-0762-4854-b820-fe88a0c90f20_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfOrdinarySharesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of ordinary shares [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfOrdinarySharesAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfOrdinarySharesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of ordinary shares [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOrdinarySharesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ClassesOfOrdinarySharesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfOrdinarySharesAxis" xlink:to="lab_ifrs-full_ClassesOfOrdinarySharesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities_9c08a3f5-dcc1-45bf-8e63-5de3f1d7d223_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financing fees and other</link:label>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other inflows (outflows) of cash, classified as financing activities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl_77620e6f-a436-4a65-af06-db1b6c6aaad8_terseLabel_en-US" xlink:label="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross proceeds from changes in ownership interests in subsidiaries that do not result in loss of control</link:label>
    <link:label id="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl_label_en-US" xlink:label="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross Proceeds From Changes In Ownership Interests In Subsidiaries That Do Not Result In Loss Of Control</link:label>
    <link:label id="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl_documentation_en-US" xlink:label="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross Proceeds From Changes In Ownership Interests In Subsidiaries That Do Not Result In Loss Of Control</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:href="tac-20191231.xsd#tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:to="lab_tac_GrossProceedsFromChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_1d7bc79f-480e-40d7-9784-7f9dc6ff0836_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers</link:label>
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    <link:label id="lab_tac_Keephills3Member_27ce5822-e323-43d9-a076-b91364f2cd6a_terseLabel_en-US" xlink:label="lab_tac_Keephills3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Keephills 3</link:label>
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    <link:label id="lab_ifrs-full_OtherProvisions_label_en-US" xlink:label="lab_ifrs-full_OtherProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other provisions</link:label>
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    <link:label id="lab_tac_LineOfCreditFacilityMember_dd17f85d-4ec7-4724-a4d2-aa2ecde00d31_terseLabel_en-US" xlink:label="lab_tac_LineOfCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit facilities</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod_19d08a01-c5af-47b1-a8ff-86b3a62c3baa_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds on sale of Wintering Hills facility and Solomon disposition (Note 4)</link:label>
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    <link:label id="lab_tac_USWindProjectsBigLevelMember_6e917b8d-f631-408e-a175-5942fefbbe82_terseLabel_en-US" xlink:label="lab_tac_USWindProjectsBigLevelMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">US Wind Projects - Big Level</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfProvisionsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfProvisionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of provisions [text block]</link:label>
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    <link:label id="lab_ifrs-full_BorrowingsByNameMember_652aeba8-87fa-45f8-8872-acb5755b15f5_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name [member]</link:label>
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    <link:label id="lab_ifrs-full_BuildingsMember_e30781b0-9d17-4309-983c-c649667dcc2a_terseLabel_en-US" xlink:label="lab_ifrs-full_BuildingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Buildings</link:label>
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    <link:label id="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_5da119de-fc26-42f0-af0b-8fe957967629_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
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    <link:label id="lab_tac_PlantInAlbertaMember_d104c954-b794-4fca-82c7-b05cf67c9024_terseLabel_en-US" xlink:label="lab_tac_PlantInAlbertaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plant In Alberta</link:label>
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    <link:label id="lab_ifrs-full_CounterpartiesMember_f3aea962-2429-4604-9b82-c592b363d987_terseLabel_en-US" xlink:label="lab_ifrs-full_CounterpartiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparties [member]</link:label>
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    <link:label id="lab_tac_PortionDenominatedInForeignCurrencyAxis_2f198b6a-f951-4b69-b57e-6faa9144ff0c_terseLabel_en-US" xlink:label="lab_tac_PortionDenominatedInForeignCurrencyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Portion Denominated In Foreign Currency [Axis]</link:label>
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    <link:label id="lab_tac_CommonsharesMember_9df4fbf4-1201-426e-b002-1f1d1dec0353_terseLabel_en-US" xlink:label="lab_tac_CommonsharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares</link:label>
    <link:label id="lab_tac_CommonsharesMember_label_en-US" xlink:label="lab_tac_CommonsharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares [Member]</link:label>
    <link:label id="lab_tac_CommonsharesMember_documentation_en-US" xlink:label="lab_tac_CommonsharesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommonsharesMember" xlink:href="tac-20191231.xsd#tac_CommonsharesMember"/>
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    <link:label id="lab_tac_DiscontinuedHedgePositionsMember_2e53f1d2-a515-4cc1-aa5d-127ef04a66de_terseLabel_en-US" xlink:label="lab_tac_DiscontinuedHedgePositionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discontinued Hedge Positions</link:label>
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    <link:label id="lab_tac_DiscontinuedHedgePositionsMember_documentation_en-US" xlink:label="lab_tac_DiscontinuedHedgePositionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discontinued Hedge Positions [Member]</link:label>
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    <link:label id="lab_tac_TransmissionNetworkCapacityMember_42e1f80a-0fab-46ba-baf1-df30c936a150_verboseLabel_en-US" xlink:label="lab_tac_TransmissionNetworkCapacityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transmission</link:label>
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    <link:label id="lab_tac_TransmissionNetworkCapacityMember_documentation_en-US" xlink:label="lab_tac_TransmissionNetworkCapacityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transmission Network Capacity [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransmissionNetworkCapacityMember" xlink:href="tac-20191231.xsd#tac_TransmissionNetworkCapacityMember"/>
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    <link:label id="lab_ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan_7f39ecc0-5939-4253-b1c2-71e16abe6f56_terseLabel_en-US" xlink:label="lab_ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected employer contributions</link:label>
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    <link:label id="lab_tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock_23142bb7-2f2e-4606-a385-8625451f6383_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined Benefit Obligation and Other Long-Term Liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock" xlink:to="lab_tac_DisclosureOfNoncurrentDefinedBenefitPlanLiabilitiesandOtherNoncurrentLiabilitiesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IssuedPreferredCapital_bb8011b2-2a2d-4f3f-9443-a1bf082acd6c_terseLabel_en-US" xlink:label="lab_tac_IssuedPreferredCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued preferred capital</link:label>
    <link:label id="lab_tac_IssuedPreferredCapital_e97766e0-5c92-4c08-9410-c01f6ac1efa0_verboseLabel_en-US" xlink:label="lab_tac_IssuedPreferredCapital" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares</link:label>
    <link:label id="lab_tac_IssuedPreferredCapital_label_en-US" xlink:label="lab_tac_IssuedPreferredCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Preferred Capital</link:label>
    <link:label id="lab_tac_IssuedPreferredCapital_documentation_en-US" xlink:label="lab_tac_IssuedPreferredCapital" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Preferred Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IssuedPreferredCapital" xlink:href="tac-20191231.xsd#tac_IssuedPreferredCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IssuedPreferredCapital" xlink:to="lab_tac_IssuedPreferredCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentDerivativeFinancialLiabilities_14fa000b-d963-4fa4-a466-9ae3f9674572_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management liabilities (Note 14 and 15)</link:label>
    <link:label id="lab_ifrs-full_CurrentDerivativeFinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current derivative financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:to="lab_ifrs-full_CurrentDerivativeFinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DividendsPaidToNoncontrollingInterests_25ef5fc3-f9b0-4f4a-bd12-48085d43405c_verboseLabel_en-US" xlink:label="lab_ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Distributions paid to non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_DividendsPaidToNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends paid to non-controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DividendsPaidToNoncontrollingInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:to="lab_ifrs-full_DividendsPaidToNoncontrollingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DiscountRate_da4dbc74-e140-4bd7-a0e4-a53a8cc661ab_terseLabel_en-US" xlink:label="lab_tac_DiscountRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_tac_DiscountRate_label_en-US" xlink:label="lab_tac_DiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount Rate</link:label>
    <link:label id="lab_tac_DiscountRate_documentation_en-US" xlink:label="lab_tac_DiscountRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DiscountRate" xlink:href="tac-20191231.xsd#tac_DiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DiscountRate" xlink:to="lab_tac_DiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_5bbf6243-8b0b-4d66-bb9c-50910160db66_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments Disclosures</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of entity's operating segments [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_VariableRate1Axis_e3c2c6bd-17a5-4208-b739-43abcd24463a_terseLabel_en-US" xlink:label="lab_tac_VariableRate1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_tac_VariableRate1Axis_label_en-US" xlink:label="lab_tac_VariableRate1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate1 [Axis]</link:label>
    <link:label id="lab_tac_VariableRate1Axis_documentation_en-US" xlink:label="lab_tac_VariableRate1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Variable Rate1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_VariableRate1Axis" xlink:href="tac-20191231.xsd#tac_VariableRate1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_VariableRate1Axis" xlink:to="lab_tac_VariableRate1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_JointOperationsAxis_fdc54ad4-ad36-47de-951e-c7c92f6a5f4d_terseLabel_en-US" xlink:label="lab_ifrs-full_JointOperationsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint operations [axis]</link:label>
    <link:label id="lab_ifrs-full_JointOperationsAxis_label_en-US" xlink:label="lab_ifrs-full_JointOperationsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint operations [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointOperationsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_JointOperationsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_JointOperationsAxis" xlink:to="lab_ifrs-full_JointOperationsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NonInvestmentGradeMember_9d50a89a-4974-4753-827b-7fb0122828cc_terseLabel_en-US" xlink:label="lab_tac_NonInvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Investment Grade [Member]</link:label>
    <link:label id="lab_tac_NonInvestmentGradeMember_label_en-US" xlink:label="lab_tac_NonInvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Investment Grade [Member]</link:label>
    <link:label id="lab_tac_NonInvestmentGradeMember_documentation_en-US" xlink:label="lab_tac_NonInvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Investment Grade [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NonInvestmentGradeMember" xlink:href="tac-20191231.xsd#tac_NonInvestmentGradeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NonInvestmentGradeMember" xlink:to="lab_tac_NonInvestmentGradeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IFRSsMember_42c90f58-18eb-4942-a480-d158dda4ecb3_terseLabel_en-US" xlink:label="lab_ifrs-full_IFRSsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRSs [member]</link:label>
    <link:label id="lab_ifrs-full_IFRSsMember_label_en-US" xlink:label="lab_ifrs-full_IFRSsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRSs [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IFRSsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IFRSsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IFRSsMember" xlink:to="lab_ifrs-full_IFRSsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory_4ea11447-60bb-465e-9165-e6c4836be5d3_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint arrangements</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for investment in associates and joint ventures [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FortSaskatchewanMember_73b6766b-3639-414e-b215-57071f142649_terseLabel_en-US" xlink:label="lab_tac_FortSaskatchewanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fort Saskatchewan</link:label>
    <link:label id="lab_tac_FortSaskatchewanMember_label_en-US" xlink:label="lab_tac_FortSaskatchewanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fort Saskatchewan [Member]</link:label>
    <link:label id="lab_tac_FortSaskatchewanMember_documentation_en-US" xlink:label="lab_tac_FortSaskatchewanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fort Saskatchewan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FortSaskatchewanMember" xlink:href="tac-20191231.xsd#tac_FortSaskatchewanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FortSaskatchewanMember" xlink:to="lab_tac_FortSaskatchewanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BorrowingsInterestRateBasis_d3a8fd0c-008d-470e-9a3d-6504be25519d_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, interest rate basis</link:label>
    <link:label id="lab_ifrs-full_BorrowingsInterestRateBasis_label_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, interest rate basis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRateBasis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_BorrowingsInterestRateBasis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsInterestRateBasis" xlink:to="lab_ifrs-full_BorrowingsInterestRateBasis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_WindriseMember_deff752f-7a12-44f9-96b2-6fb4147a3502_terseLabel_en-US" xlink:label="lab_tac_WindriseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Windrise</link:label>
    <link:label id="lab_tac_WindriseMember_label_en-US" xlink:label="lab_tac_WindriseMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Windrise [Member]</link:label>
    <link:label id="lab_tac_WindriseMember_documentation_en-US" xlink:label="lab_tac_WindriseMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Windrise [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_WindriseMember" xlink:href="tac-20191231.xsd#tac_WindriseMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_WindriseMember" xlink:to="lab_tac_WindriseMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory_4400e5ea-d2e1-4260-af9b-6149a51875a2_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for intangible assets other than goodwill [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RetirementPlanType1Domain_c8fb35a3-a123-4b36-bfc8-e6b4d4428b02_terseLabel_en-US" xlink:label="lab_tac_RetirementPlanType1Domain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type1 [Domain]</link:label>
    <link:label id="lab_tac_RetirementPlanType1Domain_label_en-US" xlink:label="lab_tac_RetirementPlanType1Domain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type1 [Domain]</link:label>
    <link:label id="lab_tac_RetirementPlanType1Domain_documentation_en-US" xlink:label="lab_tac_RetirementPlanType1Domain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Domain] for Retirement Plan Type1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RetirementPlanType1Domain" xlink:href="tac-20191231.xsd#tac_RetirementPlanType1Domain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RetirementPlanType1Domain" xlink:to="lab_tac_RetirementPlanType1Domain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_9d2a3ed5-ad93-42a1-964b-4ffdf56909ac_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of financial liabilities [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of financial liabilities [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis"/>
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    <link:label id="lab_tac_DisclosureofnotesandotherexplanatoryinformationAbstract_b69ddff5-3817-46fd-8018-37fb18fda906_terseLabel_en-US" xlink:label="lab_tac_DisclosureofnotesandotherexplanatoryinformationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of notes and other explanatory information [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_DerivativesMember_4b4970ab-b567-46db-9598-4defe579ca6f_terseLabel_en-US" xlink:label="lab_ifrs-full_DerivativesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivatives</link:label>
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    <link:label id="lab_tac_FullRequirementsEasternUSMember_fc1f5d93-bc45-495d-9922-74a3fb6972ab_terseLabel_en-US" xlink:label="lab_tac_FullRequirementsEasternUSMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Full requirements &#8211; Eastern US</link:label>
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    <link:label id="lab_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_0f3ee296-5122-42db-b781-ea59d8f5bc75_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromSalesOfInvestmentProperty_d38db4f1-7bf7-4b8d-9bcd-303f6e782a86_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash transferred</link:label>
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    <link:label id="lab_tac_KentHills3WindProjectMember_863c764d-9513-4055-8838-6093dbcf3dbe_terseLabel_en-US" xlink:label="lab_tac_KentHills3WindProjectMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Kent Hills 3 Wind Project</link:label>
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    <link:label id="lab_tac_GoldfieldsPowerMember_92c3f6fa-59ed-4730-ad66-c1097e8c9239_terseLabel_en-US" xlink:label="lab_tac_GoldfieldsPowerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goldfields Power</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInDerivativePriceDiscountPercent_e782012c-a1fa-4813-ad02-32a86f53ff2a_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativePriceDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Price discount ranges, percent</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInDerivativePriceDiscountPercent_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInDerivativePriceDiscountPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Derivative, Price Discount, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInDerivativePriceDiscountPercent" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInDerivativePriceDiscountPercent"/>
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    <link:label id="lab_ifrs-full_DisclosureOfJointOperationsTable_c6798f27-95e0-48b8-bcc1-867fc06f11d7_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfJointOperationsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of joint operations [table]</link:label>
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    <link:label id="lab_ifrs-full_FinancialAssetsTypeMember_39f004d9-cbea-476e-8ccf-077611affce3_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsTypeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, type [member]</link:label>
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    <link:label id="lab_tac_PercentageofpreferredsharesaddedtonetdebtinAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio_c08a34f2-f1fa-4e02-8dad-387d4b47f4bb_terseLabel_en-US" xlink:label="lab_tac_PercentageofpreferredsharesaddedtonetdebtinAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of preferred shares added to net debt in Adjusted Comparable FFO to Adjusted Net Debt</link:label>
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    <link:label id="lab_tac_PercentageofpreferredsharesaddedtonetdebtinAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio_documentation_en-US" xlink:label="lab_tac_PercentageofpreferredsharesaddedtonetdebtinAdjustedComparableFundsFromOperationstoAdjustedNetDebtRatio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of preferred shares added to net debt in Adjusted Comparable Funds From Operations to Adjusted Net Debt Ratio</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory_4a1a1744-7007-4b08-b537-e6ab03c475e6_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options</link:label>
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    <link:label id="lab_tac_ForeignExchangeForwardsOnProjectHedgesMember_47b2f44b-db17-48eb-9b9c-f0123cc80c17_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeForwardsOnProjectHedgesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange forwards on project hedges</link:label>
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    <link:label id="lab_tac_ShareCapitalReservesAndOtherEquityInterestAbstract_documentation_en-US" xlink:label="lab_tac_ShareCapitalReservesAndOtherEquityInterestAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Capital, Reserves And Other Equity Interest [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory_8497607a-33af-4dca-be4b-9978cb683ab3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net other operating (income) losses</link:label>
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    <link:label id="lab_ifrs-full_CurrentTaxLiabilitiesCurrent_817c43ab-37c5-4bb8-bb0d-4fd98f01ff2d_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes payable</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxLiabilitiesCurrent_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current tax liabilities, current</link:label>
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    <link:label id="lab_tac_ActuarialAssumptionsAbstract_9626ef57-3924-4d23-a038-36c0852cf487_terseLabel_en-US" xlink:label="lab_tac_ActuarialAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assumed health-care cost trend rate</link:label>
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    <link:label id="lab_tac_ActuarialAssumptionsAbstract_documentation_en-US" xlink:label="lab_tac_ActuarialAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial Assumptions [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_LoansAndReceivablesCategoryMember_6b36a8e1-7974-448a-b2e0-d19dbb85980d_terseLabel_en-US" xlink:label="lab_ifrs-full_LoansAndReceivablesCategoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortized cost</link:label>
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    <link:label id="lab_tac_PurchaseObligationItemMember_da82bdff-efa9-44d5-88e1-c1cf0c4bd73a_terseLabel_en-US" xlink:label="lab_tac_PurchaseObligationItemMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligation Item [Member]</link:label>
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    <link:label id="lab_tac_PurchaseObligationItemMember_documentation_en-US" xlink:label="lab_tac_PurchaseObligationItemMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligation Item [Member]</link:label>
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    <link:label id="lab_tac_Adjustedcomparablefundsoperationstoadjustednetdebtactual_a19f89c6-8c87-48d5-b17c-ed8f48ddae93_terseLabel_en-US" xlink:label="lab_tac_Adjustedcomparablefundsoperationstoadjustednetdebtactual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted comparable funds from operations to adjusted net debt, actual</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_eec29c6e-569c-4b49-b08d-1cd78e335a46_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [line items]</link:label>
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    <link:label id="lab_tac_TransAltaEnergyMarketingU.S.IncMember_a35fcb04-2806-42a4-8ba0-e8110342c8c4_terseLabel_en-US" xlink:label="lab_tac_TransAltaEnergyMarketingU.S.IncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Energy Marketing (U.S.), Inc [Member]</link:label>
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    <link:label id="lab_ifrs-full_CurrentNoncashAssetsPledgedAsCollateralForWhichTransfereeHasRightByContractOrCustomToSellOrRepledgeCollateral_0d58cd34-6470-415b-85bb-57c819d6878c_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentNoncashAssetsPledgedAsCollateralForWhichTransfereeHasRightByContractOrCustomToSellOrRepledgeCollateral" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collateral paid (Note 15)</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable_e942bc6a-2157-41aa-a335-4113dc07439e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of quantitative information about right-of-use assets [table]</link:label>
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    <link:label id="lab_tac_OtherPostEmploymentBenefitPlansthrough2024Member_a3e5b0c3-ec63-4346-8c46-83f2fcee634a_terseLabel_en-US" xlink:label="lab_tac_OtherPostEmploymentBenefitPlansthrough2024Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, through 2024</link:label>
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    <link:label id="lab_tac_Adjustedcomparablefundsoperationstoadjustednetdebttarget_31ff4181-fa00-44aa-8a92-92c191150908_terseLabel_en-US" xlink:label="lab_tac_Adjustedcomparablefundsoperationstoadjustednetdebttarget" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted comparable funds from operations to adjusted net debt, Target</link:label>
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    <link:label id="lab_ifrs-full_PowerGeneratingAssetsMember_7648a53c-c6bd-456f-87bf-60a797ea68c1_terseLabel_en-US" xlink:label="lab_ifrs-full_PowerGeneratingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Renewable generation facilities</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseInRestrictedCashAndCashEquivalents_4e416bc1-075a-413a-b65d-7d048080c63d_negatedTerseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInRestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in restricted cash and cash equivalents</link:label>
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    <link:label id="lab_tac_ContractualObligations1_82cee3a2-4720-40b6-b89f-362af6903053_totalLabel_en-US" xlink:label="lab_tac_ContractualObligations1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_83e392de-cfad-4827-bd08-0ea380f598d3_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow from operations before changes in working capital</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory_92e807f5-c8ee-4496-8fb7-fe5cf93b67e6_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEarningsPerShareExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings per share</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts_323c27eb-4a6c-41e0-a797-76b73d078d57_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market price changes</link:label>
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    <link:label id="lab_ifrs-full_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods_080541bd-dc81-419e-99ec-3020b3289902_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from performance obligations satisfied or partially satisfied in previous periods</link:label>
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    <link:label id="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_835306a8-448f-4b1c-8c6c-aeac5ee23b98_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities arising from financing activities [member]</link:label>
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    <link:label id="lab_ifrs-full_CurrentDerivativeFinancialAssets_c5182fe6-9d08-493d-9020-78d48384bc8f_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentDerivativeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk management assets</link:label>
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    <link:label id="lab_tac_LongTermPowerSaleAlbertaMember_3c004bbf-c672-48bc-a034-a9930b2e6c1d_terseLabel_en-US" xlink:label="lab_tac_LongTermPowerSaleAlbertaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Power Sale - Alberta</link:label>
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    <link:label id="lab_ifrs-full_CashAndCashEquivalents_207d0b29-24e8-4e55-b637-c267750184b1_terseLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents</link:label>
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    <link:label id="lab_tac_TAPCHoldingsL.P.Member_9f7f08ff-4f40-46d1-bb16-9264334c1d18_terseLabel_en-US" xlink:label="lab_tac_TAPCHoldingsL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TAPC Holdings</link:label>
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    <link:label id="lab_tac_ActuarialAssumptionOfDentalCostTrendRates_77d88229-e53e-4e6c-bb2c-34ba1bd7ea0d_terseLabel_en-US" xlink:label="lab_tac_ActuarialAssumptionOfDentalCostTrendRates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dental-care cost escalation</link:label>
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    <link:label id="lab_tac_BondYield_6b23dd13-1c1e-42eb-beb3-7cad40e871a0_terseLabel_en-US" xlink:label="lab_tac_BondYield" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bond yield</link:label>
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    <link:label id="lab_tac_ElectricityMember_2f84798b-1126-45be-b321-1d9704959eac_terseLabel_en-US" xlink:label="lab_tac_ElectricityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Electricity</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxLiabilityAsset_a8d1e0ea-611f-43ce-a51d-d813f93ee5b1_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilityAsset" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liability (asset)</link:label>
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    <link:label id="lab_ifrs-full_MaximumExposureToCreditRisk_a914c2c7-9e04-4586-9911-447a84100ab2_terseLabel_en-US" xlink:label="lab_ifrs-full_MaximumExposureToCreditRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum exposure to credit risk</link:label>
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    <link:label id="lab_ifrs-full_GrossProfit_3b25d218-3f1b-4ceb-b943-6c891014b088_totalLabel_en-US" xlink:label="lab_ifrs-full_GrossProfit" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross margin</link:label>
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    <link:label id="lab_ifrs-full_EquityMember_e0de1a06-3e36-437c-86a6-d7ab8390190d_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity [member]</link:label>
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    <link:label id="lab_tac_LongTermWindEnergySaleEasternU.S.Member_f306f40a-5869-4a9d-90a4-2dd22b3e3121_terseLabel_en-US" xlink:label="lab_tac_LongTermWindEnergySaleEasternU.S.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term wind energy sale &#8211; Eastern US</link:label>
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    <link:label id="lab_tac_PlanName1Axis_719f5320-ec5f-4f76-aa34-813caf6b8c12_terseLabel_en-US" xlink:label="lab_tac_PlanName1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
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    <link:label id="lab_tac_Pendinglitigationclaim_5d7b8f91-15d7-457f-9485-ed186b484c0f_terseLabel_en-US" xlink:label="lab_tac_Pendinglitigationclaim" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pending litigation claim</link:label>
    <link:label id="lab_tac_Pendinglitigationclaim_label_en-US" xlink:label="lab_tac_Pendinglitigationclaim" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pending litigation claim</link:label>
    <link:label id="lab_tac_Pendinglitigationclaim_documentation_en-US" xlink:label="lab_tac_Pendinglitigationclaim" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pending litigation claim</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Pendinglitigationclaim" xlink:href="tac-20191231.xsd#tac_Pendinglitigationclaim"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Pendinglitigationclaim" xlink:to="lab_tac_Pendinglitigationclaim" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ExercisePriceRangeOneMember_6c18f344-6747-4bd9-8a08-62ce08397aed_terseLabel_en-US" xlink:label="lab_tac_ExercisePriceRangeOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.00 - 9.00</link:label>
    <link:label id="lab_tac_ExercisePriceRangeOneMember_label_en-US" xlink:label="lab_tac_ExercisePriceRangeOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
    <link:label id="lab_tac_ExercisePriceRangeOneMember_documentation_en-US" xlink:label="lab_tac_ExercisePriceRangeOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ExercisePriceRangeOneMember" xlink:href="tac-20191231.xsd#tac_ExercisePriceRangeOneMember"/>
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    <link:label id="lab_ifrs-full_CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity_c588c5f8-24df-4f97-ac7a-03841c74c116_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense reported in equity</link:label>
    <link:label id="lab_ifrs-full_CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity_label_en-US" xlink:label="lab_ifrs-full_CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current and deferred tax relating to items credited (charged) directly to equity</link:label>
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    <link:label id="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_b6c8424c-92c9-4bf9-83dd-285eed3cbe28_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2024</link:label>
    <link:label id="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than four years and not later than five years [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:to="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IntangibleAssetsAndGoodwillMember_6ca6faeb-cfad-4a98-be70-1bd57034592f_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets and goodwill [member]</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsAndGoodwillMember_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets and goodwill [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:to="lab_ifrs-full_IntangibleAssetsAndGoodwillMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_b83ffc70-29ab-47f8-825a-caa0f8fa0a23_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flow used in financing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
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    <link:label id="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember_2e592946-e644-4c62-ae05-cecd5e85c995_terseLabel_en-US" xlink:label="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Generation - Mark To Market Value [Member]</link:label>
    <link:label id="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember_label_en-US" xlink:label="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Generation - Mark To Market Value [Member]</link:label>
    <link:label id="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember_documentation_en-US" xlink:label="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Generation - Mark To Market Value [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:href="tac-20191231.xsd#tac_CommodityPriceRiskGenerationMarkToMarketValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:to="lab_tac_CommodityPriceRiskGenerationMarkToMarketValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_InterestExpense1Member_5b4daba8-146c-4b64-9b74-5c7dd0008d5e_terseLabel_en-US" xlink:label="lab_tac_InterestExpense1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_tac_InterestExpense1Member_label_en-US" xlink:label="lab_tac_InterestExpense1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense1 [Member]</link:label>
    <link:label id="lab_tac_InterestExpense1Member_documentation_en-US" xlink:label="lab_tac_InterestExpense1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_InterestExpense1Member" xlink:href="tac-20191231.xsd#tac_InterestExpense1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_InterestExpense1Member" xlink:to="lab_tac_InterestExpense1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory_766da324-92d9-4685-aa4f-d584b2ed3907_terseLabel_en-US" xlink:label="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net addition</link:label>
    <link:label id="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory_label_en-US" xlink:label="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions Other Than Through Business Combinations, Inventory</link:label>
    <link:label id="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory_documentation_en-US" xlink:label="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions Other Than Through Business Combinations, Inventory</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:href="tac-20191231.xsd#tac_AdditionsOtherThanThroughBusinessCombinationsInventory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:to="lab_tac_AdditionsOtherThanThroughBusinessCombinationsInventory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherBorrowingsMember_22c47454-5217-4b35-b666-08edaec9ec7f_terseLabel_en-US" xlink:label="lab_tac_OtherBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_tac_OtherBorrowingsMember_label_en-US" xlink:label="lab_tac_OtherBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Borrowings [Member]</link:label>
    <link:label id="lab_tac_OtherBorrowingsMember_documentation_en-US" xlink:label="lab_tac_OtherBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Borrowings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherBorrowingsMember" xlink:href="tac-20191231.xsd#tac_OtherBorrowingsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherBorrowingsMember" xlink:to="lab_tac_OtherBorrowingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities_dfdf7aaf-cbca-4851-ba06-11678747e3a1_negatedLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in the Pioneer Pipeline</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities_6c9c8b7a-344e-4489-8e69-598ec616c402_terseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of other long-term assets, classified as investing activities</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of other long-term assets, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems_44055965-636a-4441-8ced-03c8647364e5_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems" xlink:to="lab_ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_fa0c0396-ae99-4e43-b3b7-9189197f787c_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of long-term debt and finance lease obligations (Note 22)</link:label>
    <link:label id="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_f0e40543-abec-452a-909e-bf7c2dcd8af1_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current long-term debt and finance lease obligations</link:label>
    <link:label id="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current borrowings and current portion of non-current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:to="lab_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetainedEarnings_34a35dae-8810-4da4-809a-c4cf69587a71_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deficit</link:label>
    <link:label id="lab_ifrs-full_RetainedEarnings_label_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retained earnings</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetainedEarnings" xlink:to="lab_ifrs-full_RetainedEarnings" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AmountWithheldUnderLitigationDispute_ee5ddc00-7030-47a8-8cd8-82122ec73d47_terseLabel_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDispute" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount withheld under dispute</link:label>
    <link:label id="lab_tac_AmountWithheldUnderLitigationDispute_label_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDispute" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount Withheld Under Litigation Dispute</link:label>
    <link:label id="lab_tac_AmountWithheldUnderLitigationDispute_documentation_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDispute" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount Withheld Under Litigation Dispute</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AmountWithheldUnderLitigationDispute" xlink:href="tac-20191231.xsd#tac_AmountWithheldUnderLitigationDispute"/>
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    <link:label id="lab_tac_LongtermPortionOfFinanceLeaseReceivablesMember_1747cb9e-88e3-4fbf-908e-f52b5679b2fb_terseLabel_en-US" xlink:label="lab_tac_LongtermPortionOfFinanceLeaseReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term portion of finance lease receivable</link:label>
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    <link:label id="lab_tac_SyndicatedBankCreditFacilityMember_ddbbeb6f-3cf3-4022-a91c-cf57315ae77f_terseLabel_en-US" xlink:label="lab_tac_SyndicatedBankCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Syndicated Bank Credit Facility [Member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory_84e73755-a963-4cac-ad0f-27c86e6934d1_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfClassesOfShareCapitalExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued and outstanding</link:label>
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    <link:label id="lab_ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome_f91e17c0-f003-4505-af9c-6bd30df338c9_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net impact related to cash flow hedges</link:label>
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    <link:label id="lab_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_label_en-US" xlink:label="lab_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to acquire or redeem entity's shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PaymentsToAcquireOrRedeemEntitysShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:to="lab_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InsuranceContractsMember_2db7af58-749c-4122-95ba-a8e4bde049b5_terseLabel_en-US" xlink:label="lab_ifrs-full_InsuranceContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of insurance contracts [member]</link:label>
    <link:label id="lab_ifrs-full_InsuranceContractsMember_label_en-US" xlink:label="lab_ifrs-full_InsuranceContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of insurance contracts [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InsuranceContractsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InsuranceContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InsuranceContractsMember" xlink:to="lab_ifrs-full_InsuranceContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReceivablesDueFromAssociates_bbc13f2b-6e50-4457-9225-9a2ed8143b4b_terseLabel_en-US" xlink:label="lab_ifrs-full_ReceivablesDueFromAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables due from associates</link:label>
    <link:label id="lab_ifrs-full_ReceivablesDueFromAssociates_label_en-US" xlink:label="lab_ifrs-full_ReceivablesDueFromAssociates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables due from associates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReceivablesDueFromAssociates" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ReceivablesDueFromAssociates"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReceivablesDueFromAssociates" xlink:to="lab_ifrs-full_ReceivablesDueFromAssociates" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RelatedPartyAbstract_6943b0b5-453f-4fad-8063-b5a8afc3240f_terseLabel_en-US" xlink:label="lab_tac_RelatedPartyAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Abstract]</link:label>
    <link:label id="lab_tac_RelatedPartyAbstract_label_en-US" xlink:label="lab_tac_RelatedPartyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Abstract]</link:label>
    <link:label id="lab_tac_RelatedPartyAbstract_documentation_en-US" xlink:label="lab_tac_RelatedPartyAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RelatedPartyAbstract" xlink:href="tac-20191231.xsd#tac_RelatedPartyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RelatedPartyAbstract" xlink:to="lab_tac_RelatedPartyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_0dd63ce3-bee7-45ff-8e47-a6137fff1a0e_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_231ab7c7-9dfb-48ba-8ce2-4f519d0cd795_periodStartLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, beginning of the period</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_ed2b2952-ebab-474b-a859-df9a6851e6cd_periodEndLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment, end of the period</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipment" xlink:to="lab_ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SundanceUnit1Member_2bd852b9-8be0-4cf6-bc28-4673826c0444_terseLabel_en-US" xlink:label="lab_tac_SundanceUnit1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 1</link:label>
    <link:label id="lab_tac_SundanceUnit1Member_label_en-US" xlink:label="lab_tac_SundanceUnit1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 1 [Member]</link:label>
    <link:label id="lab_tac_SundanceUnit1Member_documentation_en-US" xlink:label="lab_tac_SundanceUnit1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sundance Unit 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SundanceUnit1Member" xlink:href="tac-20191231.xsd#tac_SundanceUnit1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SundanceUnit1Member" xlink:to="lab_tac_SundanceUnit1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_40ca1068-e6ac-4832-aaff-7b7ed9cd85ca_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax expense (income) recognised in profit or loss</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax expense (income) recognised in profit or loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:to="lab_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_7c8a247d-17db-457d-8991-9fda7950f7bf_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions to intangibles (Note 19 and 34)</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_ff67a645-aa66-4106-8f89-109e90b52bb5_terseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of intangible assets</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of intangible assets, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueFromInterest_956dadbb-8d08-4eb3-a812-9bb68fd39b2e_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromInterest" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest income</link:label>
    <link:label id="lab_ifrs-full_RevenueFromInterest_label_en-US" xlink:label="lab_ifrs-full_RevenueFromInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromInterest" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RevenueFromInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueFromInterest" xlink:to="lab_ifrs-full_RevenueFromInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_a4a9fb50-c0c0-43a3-aacd-e8c9aeece42d_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta shareholders</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income, attributable to owners of parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PreferenceSharesSeriesCMember_41fff9e7-b888-46c6-bc59-616a269e0f96_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesSeriesCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series&#160;C</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesCMember_label_en-US" xlink:label="lab_tac_PreferenceSharesSeriesCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series C [Member]</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesCMember_documentation_en-US" xlink:label="lab_tac_PreferenceSharesSeriesCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series C [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PreferenceSharesSeriesCMember" xlink:href="tac-20191231.xsd#tac_PreferenceSharesSeriesCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PreferenceSharesSeriesCMember" xlink:to="lab_tac_PreferenceSharesSeriesCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentMember_ffe2c00f-74e3-48d1-82e8-7aa130835c3c_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current</link:label>
    <link:label id="lab_ifrs-full_CurrentMember_label_en-US" xlink:label="lab_ifrs-full_CurrentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CurrentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentMember" xlink:to="lab_ifrs-full_CurrentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Accelerateddepreciation_b246617d-396b-44c5-bd2e-4c153c40bf1c_terseLabel_en-US" xlink:label="lab_tac_Accelerateddepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated depreciation</link:label>
    <link:label id="lab_tac_Accelerateddepreciation_label_en-US" xlink:label="lab_tac_Accelerateddepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated depreciation</link:label>
    <link:label id="lab_tac_Accelerateddepreciation_documentation_en-US" xlink:label="lab_tac_Accelerateddepreciation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated Depreciation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Accelerateddepreciation" xlink:href="tac-20191231.xsd#tac_Accelerateddepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Accelerateddepreciation" xlink:to="lab_tac_Accelerateddepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory_01c4388e-fbb6-48ba-8fca-e17dab65e743_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transactions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of related party [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:to="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable_95368ec1-2adc-4ed6-8698-652daa23376b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of analysis of other comprehensive income by item [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of analysis of other comprehensive income by item [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:to="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights_14d55c4b-4c7c-4980-974a-db89c0f93a89_terseLabel_en-US" xlink:label="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of common shares received under Shareholder Rights Plan</link:label>
    <link:label id="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights_label_en-US" xlink:label="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value Of Common Shares Received Under Shareholder Rights</link:label>
    <link:label id="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights_documentation_en-US" xlink:label="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value Of Common Shares Received Under Shareholder Rights Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:href="tac-20191231.xsd#tac_ValueOfCommonSharesReceivedUnderShareholderRights"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:to="lab_tac_ValueOfCommonSharesReceivedUnderShareholderRights" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForStrippingCostsExplanatory_75880d96-1c17-4150-a04f-5e855a9d9109_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForStrippingCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stripping costs</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForStrippingCostsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForStrippingCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for stripping costs [text block]</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangeInDiscountRateOtherProvisions_e1e34437-5ffb-4402-814a-89e9da8a6b37_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangeInDiscountRateOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revisions in discount rates</link:label>
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    <link:label id="lab_ifrs-full_TypesOfFinancialAssetsAxis_fbf9b427-a242-4e31-bd1a-c1d05b9cc1a5_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of financial assets [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfFinancialAssetsAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of financial assets [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfFinancialAssetsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfFinancialAssetsAxis"/>
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    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember_c56a2258-0c23-4921-abe9-5b56b7827613_terseLabel_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [member]</link:label>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember_label_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [member]</link:label>
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    <link:label id="lab_tac_PreferenceSharesSeriesBMember_2e1c85b3-0f38-41d1-828f-ce964de944fb_terseLabel_en-US" xlink:label="lab_tac_PreferenceSharesSeriesBMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series&#160;B</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesBMember_label_en-US" xlink:label="lab_tac_PreferenceSharesSeriesBMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series B [Member]</link:label>
    <link:label id="lab_tac_PreferenceSharesSeriesBMember_documentation_en-US" xlink:label="lab_tac_PreferenceSharesSeriesBMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference Shares, Series B [Member]</link:label>
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    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_6736aa61-3e60-4837-9ea0-edc6b39780c9_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_53ae5948-ff67-4913-ba27-d8b1f127fceb_periodStartLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued and outstanding, beginning of year</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_74427bb1-8be5-497b-8e4a-240c2fd5b82b_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued and outstanding, end of year</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_label_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NumberOfSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfSharesOutstanding" xlink:to="lab_ifrs-full_NumberOfSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus_6b2eb2c3-0622-4b66-ab5a-94900d25e184_terseLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets, increase (decrease) in revaluation surplus</link:label>
    <link:label id="lab_ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus_label_en-US" xlink:label="lab_ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets, increase (decrease) in revaluation surplus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus"/>
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    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_9c6165d6-d293-4106-b029-423b137361b3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RetirementPlanName1Member_796779fd-fbf5-48b8-a884-14806ed62cf6_terseLabel_en-US" xlink:label="lab_tac_RetirementPlanName1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_tac_RetirementPlanName1Member_label_en-US" xlink:label="lab_tac_RetirementPlanName1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Name1 [Member]</link:label>
    <link:label id="lab_tac_RetirementPlanName1Member_documentation_en-US" xlink:label="lab_tac_RetirementPlanName1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Name1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RetirementPlanName1Member" xlink:href="tac-20191231.xsd#tac_RetirementPlanName1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RetirementPlanName1Member" xlink:to="lab_tac_RetirementPlanName1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_07a8d8b1-4958-4273-be82-63e0df531b98_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of net defined benefit liability (asset) [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of net defined benefit liability (asset) [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:to="lab_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ChangesInEquityAbstract_849b3de9-8cc5-4652-9e9b-0be3d192b805_terseLabel_en-US" xlink:label="lab_ifrs-full_ChangesInEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in equity [abstract]</link:label>
    <link:label id="lab_ifrs-full_ChangesInEquityAbstract_label_en-US" xlink:label="lab_ifrs-full_ChangesInEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in equity [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInEquityAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ChangesInEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ChangesInEquityAbstract" xlink:to="lab_ifrs-full_ChangesInEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Bond4.454PercentNovember2033MaturityMember_bfc496cc-1761-4b89-ae62-d4f9166cdc14_terseLabel_en-US" xlink:label="lab_tac_Bond4.454PercentNovember2033MaturityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bond, 4.454%, November 2033 maturity</link:label>
    <link:label id="lab_tac_Bond4.454PercentNovember2033MaturityMember_label_en-US" xlink:label="lab_tac_Bond4.454PercentNovember2033MaturityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bond, 4.454 Percent, November 2033 Maturity [Member]</link:label>
    <link:label id="lab_tac_Bond4.454PercentNovember2033MaturityMember_documentation_en-US" xlink:label="lab_tac_Bond4.454PercentNovember2033MaturityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bond, 4.454 Percent, November 2033 Maturity [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Bond4.454PercentNovember2033MaturityMember" xlink:href="tac-20191231.xsd#tac_Bond4.454PercentNovember2033MaturityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Bond4.454PercentNovember2033MaturityMember" xlink:to="lab_tac_Bond4.454PercentNovember2033MaturityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OptiontoAcquirePipelineOwnershipPercentage_0871c6d0-5064-4e29-afb1-f52cf059ba62_terseLabel_en-US" xlink:label="lab_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Future option to acquire pipeline, ownership percentage</link:label>
    <link:label id="lab_tac_OptiontoAcquirePipelineOwnershipPercentage_label_en-US" xlink:label="lab_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option to Acquire Pipeline, Ownership Percentage</link:label>
    <link:label id="lab_tac_OptiontoAcquirePipelineOwnershipPercentage_documentation_en-US" xlink:label="lab_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Option to Acquire Pipeline, Ownership Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:href="tac-20191231.xsd#tac_OptiontoAcquirePipelineOwnershipPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:to="lab_tac_OptiontoAcquirePipelineOwnershipPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PlanAssetsMember_d310b518-5fc6-42bc-b6ad-8a8de962f8de_terseLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsMember_c457ebf1-0df3-4c98-a4a9-01acb9d441fe_verboseLabel_en-US" xlink:label="lab_ifrs-full_PlanAssetsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value of plan assets</link:label>
    <link:label id="lab_ifrs-full_PlanAssetsMember_label_en-US" xlink:label="lab_ifrs-full_PlanAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan assets [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PlanAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PlanAssetsMember" xlink:to="lab_ifrs-full_PlanAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainLossOnHedgeIneffectiveness_6f4fce5d-75ea-4e52-9b91-caa6cfb5c7d8_terseLabel_en-US" xlink:label="lab_ifrs-full_GainLossOnHedgeIneffectiveness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on hedge ineffectiveness</link:label>
    <link:label id="lab_ifrs-full_GainLossOnHedgeIneffectiveness_label_en-US" xlink:label="lab_ifrs-full_GainLossOnHedgeIneffectiveness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on hedge ineffectiveness</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnHedgeIneffectiveness" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_GainLossOnHedgeIneffectiveness"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainLossOnHedgeIneffectiveness" xlink:to="lab_ifrs-full_GainLossOnHedgeIneffectiveness" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NewIFRSsMember_4d06c9ef-204e-4686-938b-5a941ff0ed4d_terseLabel_en-US" xlink:label="lab_ifrs-full_NewIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [member]</link:label>
    <link:label id="lab_ifrs-full_NewIFRSsMember_label_en-US" xlink:label="lab_ifrs-full_NewIFRSsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewIFRSsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NewIFRSsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NewIFRSsMember" xlink:to="lab_ifrs-full_NewIFRSsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FinancialInstrumentsAbstract_c7c70bd0-dc42-492a-9e74-8ce8cc761fed_terseLabel_en-US" xlink:label="lab_tac_FinancialInstrumentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments [Abstract]</link:label>
    <link:label id="lab_tac_FinancialInstrumentsAbstract_label_en-US" xlink:label="lab_tac_FinancialInstrumentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments [Abstract]</link:label>
    <link:label id="lab_tac_FinancialInstrumentsAbstract_documentation_en-US" xlink:label="lab_tac_FinancialInstrumentsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FinancialInstrumentsAbstract" xlink:href="tac-20191231.xsd#tac_FinancialInstrumentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FinancialInstrumentsAbstract" xlink:to="lab_tac_FinancialInstrumentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CountryOfDomicileMember_a085eab0-6e6f-43db-8421-7c3e3ac3b922_terseLabel_en-US" xlink:label="lab_ifrs-full_CountryOfDomicileMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Country of domicile [member]</link:label>
    <link:label id="lab_ifrs-full_CountryOfDomicileMember_label_en-US" xlink:label="lab_ifrs-full_CountryOfDomicileMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Country of domicile [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CountryOfDomicileMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CountryOfDomicileMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CountryOfDomicileMember" xlink:to="lab_ifrs-full_CountryOfDomicileMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherNoncurrentLiabilities1Member_c319a5f9-8172-42d8-b038-58df0a5b4c32_terseLabel_en-US" xlink:label="lab_tac_OtherNoncurrentLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other long-term liabilities</link:label>
    <link:label id="lab_tac_OtherNoncurrentLiabilities1Member_label_en-US" xlink:label="lab_tac_OtherNoncurrentLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncurrent Liabilities1 [Member]</link:label>
    <link:label id="lab_tac_OtherNoncurrentLiabilities1Member_documentation_en-US" xlink:label="lab_tac_OtherNoncurrentLiabilities1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Noncurrent Liabilities1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherNoncurrentLiabilities1Member" xlink:href="tac-20191231.xsd#tac_OtherNoncurrentLiabilities1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherNoncurrentLiabilities1Member" xlink:to="lab_tac_OtherNoncurrentLiabilities1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Equity_cdd0ab9a-58dd-47ac-9d1c-522a4ab56d4c_totalLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_ifrs-full_Equity_b270f595-05fd-4361-b0d0-c3fe20c9fe16_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance, beginning of year</link:label>
    <link:label id="lab_ifrs-full_Equity_b7aef4d1-e59d-4900-9e8f-5980ae5cf3bf_periodEndLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance, end of year</link:label>
    <link:label id="lab_ifrs-full_Equity_adf8bcaa-4886-4858-ac90-a5f6fe7e1b61_verboseLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_ifrs-full_Equity_5331ac4f-8e15-4827-a045-5160f5f91a6e_terseLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_ifrs-full_Equity_label_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_Equity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Equity" xlink:to="lab_ifrs-full_Equity" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CrossCurrencySwapsMember_4d42de50-9f78-4502-9c86-d4128fd2f745_terseLabel_en-US" xlink:label="lab_tac_CrossCurrencySwapsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cross-currency swaps</link:label>
    <link:label id="lab_tac_CrossCurrencySwapsMember_label_en-US" xlink:label="lab_tac_CrossCurrencySwapsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cross-Currency Swaps [Member]</link:label>
    <link:label id="lab_tac_CrossCurrencySwapsMember_documentation_en-US" xlink:label="lab_tac_CrossCurrencySwapsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cross-Currency Swaps [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CrossCurrencySwapsMember" xlink:href="tac-20191231.xsd#tac_CrossCurrencySwapsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CrossCurrencySwapsMember" xlink:to="lab_tac_CrossCurrencySwapsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_VehiclesMember_b70c4e88-fb77-4f3a-816a-f95ed8af9eed_terseLabel_en-US" xlink:label="lab_ifrs-full_VehiclesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vehicles</link:label>
    <link:label id="lab_ifrs-full_VehiclesMember_label_en-US" xlink:label="lab_ifrs-full_VehiclesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vehicles [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_VehiclesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_VehiclesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_VehiclesMember" xlink:to="lab_ifrs-full_VehiclesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_HedgingInstrumentAssets_a4409b98-c393-4480-8721-dd4ef86fe324_terseLabel_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instrument, assets</link:label>
    <link:label id="lab_ifrs-full_HedgingInstrumentAssets_69cca9a1-285f-445e-ac43-8214550dedee_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value asset of hedging instruments on long-term debt</link:label>
    <link:label id="lab_ifrs-full_HedgingInstrumentAssets_label_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instrument, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_HedgingInstrumentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HedgingInstrumentAssets" xlink:to="lab_ifrs-full_HedgingInstrumentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract_3d910505-de8c-4b9e-b922-b9b264061cbe_terseLabel_en-US" xlink:label="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]</link:label>
    <link:label id="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract_label_en-US" xlink:label="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]</link:label>
    <link:label id="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract_documentation_en-US" xlink:label="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:href="tac-20191231.xsd#tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:to="lab_tac_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LongtermLineOfCredit_9831549b-d17c-4177-a4af-127cae09ae0a_terseLabel_en-US" xlink:label="lab_tac_LongtermLineOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Line Of Credit</link:label>
    <link:label id="lab_tac_LongtermLineOfCredit_label_en-US" xlink:label="lab_tac_LongtermLineOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Line Of Credit</link:label>
    <link:label id="lab_tac_LongtermLineOfCredit_documentation_en-US" xlink:label="lab_tac_LongtermLineOfCredit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Line Of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongtermLineOfCredit" xlink:href="tac-20191231.xsd#tac_LongtermLineOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LongtermLineOfCredit" xlink:to="lab_tac_LongtermLineOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative_47059f10-1ce0-47d0-90fe-9d92fa4451cf_terseLabel_en-US" xlink:label="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Implied volatility for shares, significant unobservable inputs, entity's own derivative</link:label>
    <link:label id="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative_label_en-US" xlink:label="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Implied Volatility For Shares, Significant Unobservable Inputs, Entity's Own Derivative</link:label>
    <link:label id="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative_documentation_en-US" xlink:label="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Implied Volatility For Shares, Significant Unobservable Inputs, Entity's Own Derivative</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:href="tac-20191231.xsd#tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:to="lab_tac_ImpliedVolatilityForSharesSignificantUnobservableInputsEntitysOwnDerivative" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_e3d756ba-9749-4462-9ac0-bf0134637366_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:to="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PipelineMember_89dfb4b3-c7f9-4690-8cfa-5ca7637512d2_terseLabel_en-US" xlink:label="lab_tac_PipelineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pipeline</link:label>
    <link:label id="lab_tac_PipelineMember_label_en-US" xlink:label="lab_tac_PipelineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pipeline [Member]</link:label>
    <link:label id="lab_tac_PipelineMember_documentation_en-US" xlink:label="lab_tac_PipelineMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Pipeline</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PipelineMember" xlink:href="tac-20191231.xsd#tac_PipelineMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PipelineMember" xlink:to="lab_tac_PipelineMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived_df3b1ceb-9c4e-4c6d-860d-5d1af3084b71_terseLabel_en-US" xlink:label="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted operating lease payments to be received</link:label>
    <link:label id="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived_label_en-US" xlink:label="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted operating lease payments to be received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:to="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FixedpriceContractsMember_f0f62f54-3555-451a-95ed-52019b7ca9f8_terseLabel_en-US" xlink:label="lab_ifrs-full_FixedpriceContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fixed-price contracts</link:label>
    <link:label id="lab_ifrs-full_FixedpriceContractsMember_label_en-US" xlink:label="lab_ifrs-full_FixedpriceContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fixed-price contracts [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FixedpriceContractsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FixedpriceContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FixedpriceContractsMember" xlink:to="lab_ifrs-full_FixedpriceContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_d83765ff-4887-4ede-a404-7bd50cea83ac_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash interest paid</link:label>
    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest paid, classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:to="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_FinanceLeaseMember_cc4e8dd6-505c-4e31-8abb-19dd328b29b0_terseLabel_en-US" xlink:label="lab_tac_FinanceLeaseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease</link:label>
    <link:label id="lab_tac_FinanceLeaseMember_label_en-US" xlink:label="lab_tac_FinanceLeaseMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease [Member]</link:label>
    <link:label id="lab_tac_FinanceLeaseMember_documentation_en-US" xlink:label="lab_tac_FinanceLeaseMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FinanceLeaseMember" xlink:href="tac-20191231.xsd#tac_FinanceLeaseMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FinanceLeaseMember" xlink:to="lab_tac_FinanceLeaseMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_407067e8-45f4-4c37-afbe-7796b355f13a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of classes of share capital [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of classes of share capital [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="lab_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfLeasesExplanatory_cd1f052e-d612-4832-8486-26086f9dbfd3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease Receivables</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfLeasesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of leases [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfLeasesExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfLeasesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfLeasesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed_f652d9a7-82df-487e-aaa4-7aedeb19be4b_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense relating to leases of low-value assets for which recognition exemption has been used</link:label>
    <link:label id="lab_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed_label_en-US" xlink:label="lab_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense relating to leases of low-value assets for which recognition exemption has been used</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:to="lab_ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DividendsPaid_b053fab6-69c2-4e40-8afa-73b6a61a9817_terseLabel_en-US" xlink:label="lab_ifrs-full_DividendsPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred share dividends (Note 25)</link:label>
    <link:label id="lab_ifrs-full_DividendsPaid_392e4513-4819-4589-adf9-bdf80985d688_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DividendsPaid" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share dividends (Note 24)</link:label>
    <link:label id="lab_ifrs-full_DividendsPaid_label_en-US" xlink:label="lab_ifrs-full_DividendsPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends recognised as distributions to owners</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsPaid" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DividendsPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DividendsPaid" xlink:to="lab_ifrs-full_DividendsPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_f9870aca-5597-4675-8ad8-11d743667360_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset)</link:label>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_918f2ca6-528e-49fc-9001-0875a347e40e_negatedPeriodStartLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net asset, beginning of period</link:label>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_2aa5ce92-9496-439d-89f0-1e6ab5e38e50_negatedPeriodEndLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net asset, ending of period</link:label>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_9df5e67d-b078-4f8c-bf0c-2ed53e013506_periodStartLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation, beginning of period</link:label>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_b3086c8e-4a80-448b-a711-b276169f0708_periodEndLabel_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation, ending of period</link:label>
    <link:label id="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_label_en-US" xlink:label="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:to="lab_ifrs-full_LiabilityAssetOfDefinedBenefitPlans" xlink:type="arc" order="1"/>
    <link:label id="lab_stpr_CA_85aad456-480f-4365-81e2-56423a62380c_terseLabel_en-US" xlink:label="lab_stpr_CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">California</link:label>
    <link:label id="lab_stpr_CA_label_en-US" xlink:label="lab_stpr_CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CALIFORNIA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_CA" xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_CA"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_CA" xlink:to="lab_stpr_CA" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Goodwill_adaef1a3-0ec8-405e-89af-b2edf51a4d51_terseLabel_en-US" xlink:label="lab_ifrs-full_Goodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_ifrs-full_Goodwill_label_en-US" xlink:label="lab_ifrs-full_Goodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Goodwill" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_Goodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Goodwill" xlink:to="lab_ifrs-full_Goodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract_211de191-3840-4a81-a235-ea99a6af582c_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in other provisions [abstract]</link:label>
    <link:label id="lab_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract_label_en-US" xlink:label="lab_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reconciliation of changes in other provisions [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract" xlink:to="lab_ifrs-full_ReconciliationOfChangesInOtherProvisionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities_756912bc-5be4-4188-aeef-0e2f12ee9c6a_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets pledged as collateral for liabilities or contingent liabilities</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities_label_en-US" xlink:label="lab_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets pledged as collateral for liabilities or contingent liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities" xlink:to="lab_ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SignificantEventsAbstract_3934e938-0627-4e7c-8bb7-d17b7756fc66_terseLabel_en-US" xlink:label="lab_tac_SignificantEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Events [Abstract]</link:label>
    <link:label id="lab_tac_SignificantEventsAbstract_label_en-US" xlink:label="lab_tac_SignificantEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Events [Abstract]</link:label>
    <link:label id="lab_tac_SignificantEventsAbstract_documentation_en-US" xlink:label="lab_tac_SignificantEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Events [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SignificantEventsAbstract" xlink:href="tac-20191231.xsd#tac_SignificantEventsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SignificantEventsAbstract" xlink:to="lab_tac_SignificantEventsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory_5b742c39-6ecc-4721-b469-a2dafc70953a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Assets</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value of plan assets [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_invest_DerivativeNotionalAmount_010636f7-89a8-4ebf-a728-c72f156363c9_terseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative hedge, notional amount</link:label>
    <link:label id="lab_invest_DerivativeNotionalAmount_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_invest_DerivativeNotionalAmount" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNotionalAmount" xlink:to="lab_invest_DerivativeNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio_5b1380aa-771d-4241-9ec7-3d4ea5c7b0da_terseLabel_en-US" xlink:label="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of dividends added to Comparable FFO before Interest to Adjusted Interest Coverage</link:label>
    <link:label id="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio_label_en-US" xlink:label="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of dividends added to Comparable Funds From Operations before Interest to Adjusted Interest Coverage Ratio</link:label>
    <link:label id="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio_documentation_en-US" xlink:label="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of dividends added to Comparable Funds From Operations before Interest to Adjusted Interest Coverage Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:href="tac-20191231.xsd#tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:to="lab_tac_PercentageofdividendsaddedtoComparableFundsFromOperationsbeforeInteresttoAdjustedInterestCoverageRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract_d30c0806-1de9-437b-856d-ac832d64c90d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of analysis of other comprehensive income by item [abstract]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of analysis of other comprehensive income by item [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract" xlink:to="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DividendRateOnPreferenceShares_3c857690-35b3-459f-b587-c47b20d28fad_terseLabel_en-US" xlink:label="lab_tac_DividendRateOnPreferenceShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Annualized fixed dividend rate</link:label>
    <link:label id="lab_tac_DividendRateOnPreferenceShares_label_en-US" xlink:label="lab_tac_DividendRateOnPreferenceShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend Rate On Preference Shares</link:label>
    <link:label id="lab_tac_DividendRateOnPreferenceShares_documentation_en-US" xlink:label="lab_tac_DividendRateOnPreferenceShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend Rate On Preference Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DividendRateOnPreferenceShares" xlink:href="tac-20191231.xsd#tac_DividendRateOnPreferenceShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DividendRateOnPreferenceShares" xlink:to="lab_tac_DividendRateOnPreferenceShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis_230afdd4-f416-4f24-bbd6-d1908119ae33_terseLabel_en-US" xlink:label="lab_ifrs-full_AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets and liabilities classified as held for sale [axis]</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInNetInvestmentInFinanceLease_767a855e-0fcb-4f3c-9019-2f49fda149b7_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNetInvestmentInFinanceLease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease in finance lease receivable</link:label>
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    <link:label id="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFreeLoanMaximumAmountasPercentageofEmployeeSalary_179777ce-acaf-4395-800a-51ec0465905c_terseLabel_en-US" xlink:label="lab_tac_SharebasedCompensationArrangementbySharebasedPaymentAwardInterestFreeLoanMaximumAmountasPercentageofEmployeeSalary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum amount of interest fee loan as percent of employee salary (as percent)</link:label>
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    <link:label id="lab_tac_AAARatingMember_bbf1a013-0a6f-4f8d-b02e-c7e9adefd672_terseLabel_en-US" xlink:label="lab_tac_AAARatingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AAA</link:label>
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    <link:label id="lab_tac_AAARatingMember_documentation_en-US" xlink:label="lab_tac_AAARatingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AAA Rating [Member]</link:label>
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    <link:label id="lab_tac_TransAltaEnergyAustralia.PtvLtdMember_7ed9c0e9-48a5-4c92-bda8-ac4f2fdf59d8_terseLabel_en-US" xlink:label="lab_tac_TransAltaEnergyAustralia.PtvLtdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Energy (Australia). Ptv Ltd [Member]</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_ebabf37f-29e8-4f13-8aef-ca7bde8b053b_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on derivatives designated as cash flow hedges, net of tax</link:label>
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    <link:label id="lab_tac_CoalFacilityMember_a16a921f-d526-4817-999e-eefe68fde308_terseLabel_en-US" xlink:label="lab_tac_CoalFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal facility</link:label>
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    <link:label id="lab_tac_CoalFacilityMember_documentation_en-US" xlink:label="lab_tac_CoalFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CoalFacilityMember" xlink:href="tac-20191231.xsd#tac_CoalFacilityMember"/>
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    <link:label id="lab_ifrs-full_DisclosureOfGoodwillExplanatory_89ca9337-e91e-41b8-aad5-b4b3f01d6f6e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfGoodwillExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
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    <link:label id="lab_tac_UnsecuredDebt1Member_62db77b0-62a5-4307-a9be-cae830dd7135_terseLabel_en-US" xlink:label="lab_tac_UnsecuredDebt1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debentures</link:label>
    <link:label id="lab_tac_UnsecuredDebt1Member_label_en-US" xlink:label="lab_tac_UnsecuredDebt1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unsecured Debt1 [Member]</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains_5673b18f-ee08-4449-949f-edab8ce4d2c0_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized foreign exchange loss</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_afd54c0b-6b6d-47aa-905b-f743feb6e472_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset impairment charges (reversals) (Note 7)</link:label>
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    <link:label id="lab_tac_DesignatedasHedgingInstrumentMember_0bb85eb4-421e-4e3d-844c-9e7eee4302ae_terseLabel_en-US" xlink:label="lab_tac_DesignatedasHedgingInstrumentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Designated as hedging instrument</link:label>
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    <link:label id="lab_tac_ProjectLevelFinancingThatIsNoLongerPracticableMember_ae154d60-0625-4f01-ab9d-9a30b3014d28_terseLabel_en-US" xlink:label="lab_tac_ProjectLevelFinancingThatIsNoLongerPracticableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Project level financing that is no longer practicable</link:label>
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    <link:label id="lab_invest_InvestmentTable_37a3fa94-71ac-480c-a031-55bb357dbeaa_terseLabel_en-US" xlink:label="lab_invest_InvestmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Table]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_invest_InvestmentTable" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentTable" xlink:to="lab_invest_InvestmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_EmployeeBenefitsAbstract_09679c85-8779-4ae7-acea-08344f4e5aa6_terseLabel_en-US" xlink:label="lab_tac_EmployeeBenefitsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee future benefits</link:label>
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    <link:label id="lab_tac_EmployeeBenefitsAbstract_documentation_en-US" xlink:label="lab_tac_EmployeeBenefitsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_EmployeeBenefitsAbstract" xlink:href="tac-20191231.xsd#tac_EmployeeBenefitsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_EmployeeBenefitsAbstract" xlink:to="lab_tac_EmployeeBenefitsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_HydroGenerationMember_4fb13927-1f3f-4e99-9021-5fa8cbe6e181_terseLabel_en-US" xlink:label="lab_tac_HydroGenerationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hydro</link:label>
    <link:label id="lab_tac_HydroGenerationMember_label_en-US" xlink:label="lab_tac_HydroGenerationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hydro Generation [Member]</link:label>
    <link:label id="lab_tac_HydroGenerationMember_documentation_en-US" xlink:label="lab_tac_HydroGenerationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hydro Generation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_HydroGenerationMember" xlink:href="tac-20191231.xsd#tac_HydroGenerationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_HydroGenerationMember" xlink:to="lab_tac_HydroGenerationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_f005cf6b-f789-417a-bc47-1efc00cd6e8a_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of options</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromExerciseOfOptions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProceedsFromExerciseOfOptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromExerciseOfOptions" xlink:to="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_ecb8a4a3-f746-4991-98a3-c743ddf0a756_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment of long-term debt (Note 22)</link:label>
    <link:label id="lab_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of borrowings, classified as financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseDecreaseInOtherBorrowings_7ffe64f8-455d-4932-919c-aa1a212d76ce_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseInOtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in exchangeable securities</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInOtherBorrowings_label_en-US" xlink:label="lab_tac_IncreaseDecreaseInOtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Other Borrowings</link:label>
    <link:label id="lab_tac_IncreaseDecreaseInOtherBorrowings_documentation_en-US" xlink:label="lab_tac_IncreaseDecreaseInOtherBorrowings" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Other Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseDecreaseInOtherBorrowings" xlink:href="tac-20191231.xsd#tac_IncreaseDecreaseInOtherBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseDecreaseInOtherBorrowings" xlink:to="lab_tac_IncreaseDecreaseInOtherBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestInJointOperation_73fa34b2-aa54-43e2-b5e2-272f868d43f7_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestInJointOperation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interest in joint operation</link:label>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestInJointOperation_label_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestInJointOperation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interest in joint operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInJointOperation" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProportionOfOwnershipInterestInJointOperation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProportionOfOwnershipInterestInJointOperation" xlink:to="lab_ifrs-full_ProportionOfOwnershipInterestInJointOperation" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ProjectDevelopmentCostsNoncurrent_b3e7af59-d418-43ad-88b3-e917e871568a_terseLabel_en-US" xlink:label="lab_tac_ProjectDevelopmentCostsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Project development costs</link:label>
    <link:label id="lab_tac_ProjectDevelopmentCostsNoncurrent_label_en-US" xlink:label="lab_tac_ProjectDevelopmentCostsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Project Development Costs, Non-current</link:label>
    <link:label id="lab_tac_ProjectDevelopmentCostsNoncurrent_documentation_en-US" xlink:label="lab_tac_ProjectDevelopmentCostsNoncurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Project Development Costs, Non-current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ProjectDevelopmentCostsNoncurrent" xlink:href="tac-20191231.xsd#tac_ProjectDevelopmentCostsNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ProjectDevelopmentCostsNoncurrent" xlink:to="lab_tac_ProjectDevelopmentCostsNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_c97e65b3-dab5-482d-8581-a1282d3569c0_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition of renewable energy facilities, net of cash acquired (Note 4)</link:label>
    <link:label id="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory_ac6de133-090e-4264-ba95-0126fce7e2da_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Joint arrangements</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in other entities [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfInterestsInOtherEntitiesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RestrictedShareUnitRSUMember_e5233803-48c0-409f-a913-8b10840804f3_terseLabel_en-US" xlink:label="lab_tac_RestrictedShareUnitRSUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RSUs</link:label>
    <link:label id="lab_tac_RestrictedShareUnitRSUMember_label_en-US" xlink:label="lab_tac_RestrictedShareUnitRSUMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Share Unit (RSU) [Member]</link:label>
    <link:label id="lab_tac_RestrictedShareUnitRSUMember_documentation_en-US" xlink:label="lab_tac_RestrictedShareUnitRSUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted Share Unit (RSU) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RestrictedShareUnitRSUMember" xlink:href="tac-20191231.xsd#tac_RestrictedShareUnitRSUMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RestrictedShareUnitRSUMember" xlink:to="lab_tac_RestrictedShareUnitRSUMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_A2.95NonRecourseBondsDueMay2023Member_3c076ef8-3b80-45e3-8f92-3961c8feba70_terseLabel_en-US" xlink:label="lab_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2.95% Non-Recourse Bonds due 2023</link:label>
    <link:label id="lab_tac_A2.95NonRecourseBondsDueMay2023Member_label_en-US" xlink:label="lab_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2.95% Non-Recourse Bonds Due May 2023 [Member]</link:label>
    <link:label id="lab_tac_A2.95NonRecourseBondsDueMay2023Member_documentation_en-US" xlink:label="lab_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2.95% Non-Recourse Bonds Due May 2023 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:href="tac-20191231.xsd#tac_A2.95NonRecourseBondsDueMay2023Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:to="lab_tac_A2.95NonRecourseBondsDueMay2023Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CostOfSales_cd8fbc55-3dc1-46fd-b157-8c702c0bcf54_terseLabel_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fuel and purchased power (Note 6)</link:label>
    <link:label id="lab_ifrs-full_CostOfSales_b8d403d6-219c-4590-a34c-26205edd8f78_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fuel and purchased power</link:label>
    <link:label id="lab_ifrs-full_CostOfSales_60dc93ba-6389-46c7-b15c-3f6c08d3a15a_totalLabel_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ifrs-full_CostOfSales_label_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost of sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CostOfSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CostOfSales" xlink:to="lab_ifrs-full_CostOfSales" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NonRecourseBondsMember_44ec9c9e-a038-4e4a-a35e-bb4fe2d3e0c7_terseLabel_en-US" xlink:label="lab_tac_NonRecourseBondsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Bonds</link:label>
    <link:label id="lab_tac_NonRecourseBondsMember_label_en-US" xlink:label="lab_tac_NonRecourseBondsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Bonds [Member]</link:label>
    <link:label id="lab_tac_NonRecourseBondsMember_documentation_en-US" xlink:label="lab_tac_NonRecourseBondsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Recourse Bonds [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NonRecourseBondsMember" xlink:href="tac-20191231.xsd#tac_NonRecourseBondsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NonRecourseBondsMember" xlink:to="lab_tac_NonRecourseBondsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_bdd265de-3eed-4a9d-9090-c1c0164032bb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_LakeswindSolarProjectsMember_1ec03a66-fff7-4e34-9e03-8be45a2e39be_terseLabel_en-US" xlink:label="lab_tac_LakeswindSolarProjectsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind Solar Projects</link:label>
    <link:label id="lab_tac_LakeswindSolarProjectsMember_label_en-US" xlink:label="lab_tac_LakeswindSolarProjectsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind Solar Projects [Member]</link:label>
    <link:label id="lab_tac_LakeswindSolarProjectsMember_documentation_en-US" xlink:label="lab_tac_LakeswindSolarProjectsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind Solar Projects [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LakeswindSolarProjectsMember" xlink:href="tac-20191231.xsd#tac_LakeswindSolarProjectsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LakeswindSolarProjectsMember" xlink:to="lab_tac_LakeswindSolarProjectsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NewBrunswickPowerCorporationMember_044f89d6-8984-462a-a471-9c6843ab3b65_terseLabel_en-US" xlink:label="lab_tac_NewBrunswickPowerCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Brunswick Power Corporation</link:label>
    <link:label id="lab_tac_NewBrunswickPowerCorporationMember_label_en-US" xlink:label="lab_tac_NewBrunswickPowerCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Brunswick Power Corporation [Member]</link:label>
    <link:label id="lab_tac_NewBrunswickPowerCorporationMember_documentation_en-US" xlink:label="lab_tac_NewBrunswickPowerCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Brunswick Power Corporation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NewBrunswickPowerCorporationMember" xlink:href="tac-20191231.xsd#tac_NewBrunswickPowerCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NewBrunswickPowerCorporationMember" xlink:to="lab_tac_NewBrunswickPowerCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ContingentLiabilitiesMember_595cd41a-5444-402c-b408-d551538e7e11_terseLabel_en-US" xlink:label="lab_ifrs-full_ContingentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent liabilities [member]</link:label>
    <link:label id="lab_ifrs-full_ContingentLiabilitiesMember_label_en-US" xlink:label="lab_ifrs-full_ContingentLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent liabilities [member]</link:label>
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    <link:label id="lab_tac_AccruedBenefitObligationMember_01382eef-c88c-40b4-9d05-2764b6ac2b81_terseLabel_en-US" xlink:label="lab_tac_AccruedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Benefit Obligation</link:label>
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    <link:label id="lab_tac_AccruedBenefitObligationMember_documentation_en-US" xlink:label="lab_tac_AccruedBenefitObligationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Benefit Obligation [Member]</link:label>
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    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member_46b2da09-0892-4cd1-b7ea-7df80a014b8b_terseLabel_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Bilateral Credit Facilities In 2021 [Member]</link:label>
    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member_label_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Bilateral Credit Facilities In 2021 [Member]</link:label>
    <link:label id="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member_documentation_en-US" xlink:label="lab_tac_CommittedBilateralCreditFacilitiesIn2021Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Bilateral Credit Facilities In 2021 [Member]</link:label>
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    <link:label id="lab_tac_A5.28NonRecourseDebentureMember_ebd009d2-83af-427e-b08b-44c721a0e042_terseLabel_en-US" xlink:label="lab_tac_A5.28NonRecourseDebentureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.28% Non-Recourse Debenture</link:label>
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    <link:label id="lab_tac_ScenarioForecast1Member_6ca97969-2873-4305-a34e-e138a7e12bef_terseLabel_en-US" xlink:label="lab_tac_ScenarioForecast1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario, Forecast</link:label>
    <link:label id="lab_tac_ScenarioForecast1Member_label_en-US" xlink:label="lab_tac_ScenarioForecast1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario, Forecast1 [Member]</link:label>
    <link:label id="lab_tac_ScenarioForecast1Member_documentation_en-US" xlink:label="lab_tac_ScenarioForecast1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Scenario, Forecast1 [Member]</link:label>
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    <link:label id="lab_ifrs-full_ProfitLoss_label_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProfitLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLoss" xlink:to="lab_ifrs-full_ProfitLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TaxShieldOnTaxEquityFinancing_9264bdb0-34b4-432d-a6f1-8727e02bbeaa_negatedLabel_en-US" xlink:label="lab_tac_TaxShieldOnTaxEquityFinancing" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax shield on tax equity financing</link:label>
    <link:label id="lab_tac_TaxShieldOnTaxEquityFinancing_label_en-US" xlink:label="lab_tac_TaxShieldOnTaxEquityFinancing" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Shield On Tax Equity Financing</link:label>
    <link:label id="lab_tac_TaxShieldOnTaxEquityFinancing_documentation_en-US" xlink:label="lab_tac_TaxShieldOnTaxEquityFinancing" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Shield On Tax Equity Financing</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TaxShieldOnTaxEquityFinancing" xlink:href="tac-20191231.xsd#tac_TaxShieldOnTaxEquityFinancing"/>
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    <link:label id="lab_tac_TidewaterBrazeauRiverPipelineMember_1fe4c608-ff17-415d-9d61-d5d159445954_terseLabel_en-US" xlink:label="lab_tac_TidewaterBrazeauRiverPipelineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tidewater Brazeau River Pipeline</link:label>
    <link:label id="lab_tac_TidewaterBrazeauRiverPipelineMember_label_en-US" xlink:label="lab_tac_TidewaterBrazeauRiverPipelineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tidewater Brazeau River Pipeline [Member]</link:label>
    <link:label id="lab_tac_TidewaterBrazeauRiverPipelineMember_documentation_en-US" xlink:label="lab_tac_TidewaterBrazeauRiverPipelineMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tidewater Brazeau River Pipeline [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TidewaterBrazeauRiverPipelineMember" xlink:href="tac-20191231.xsd#tac_TidewaterBrazeauRiverPipelineMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TidewaterBrazeauRiverPipelineMember" xlink:to="lab_tac_TidewaterBrazeauRiverPipelineMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities_661b603b-c61c-4a84-b349-84d7eca7fd17_terseLabel_en-US" xlink:label="lab_ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maturity Analysis of Financial Liabilities</link:label>
    <link:label id="lab_ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis for derivative financial liabilities [text block]</link:label>
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    <link:label id="lab_tac_CommodityPriceRiskProprietaryTradingMember_30ef09c9-a970-4caf-8cb0-869c532f9896_terseLabel_en-US" xlink:label="lab_tac_CommodityPriceRiskProprietaryTradingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Proprietary Trading [Member]</link:label>
    <link:label id="lab_tac_CommodityPriceRiskProprietaryTradingMember_label_en-US" xlink:label="lab_tac_CommodityPriceRiskProprietaryTradingMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Proprietary Trading [Member]</link:label>
    <link:label id="lab_tac_CommodityPriceRiskProprietaryTradingMember_documentation_en-US" xlink:label="lab_tac_CommodityPriceRiskProprietaryTradingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commodity Price Risk - Proprietary Trading [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommodityPriceRiskProprietaryTradingMember" xlink:href="tac-20191231.xsd#tac_CommodityPriceRiskProprietaryTradingMember"/>
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    <link:label id="lab_tac_InvestmentGradeMember_ebfe4eec-202c-4522-9bea-6b1c80f5cb4e_terseLabel_en-US" xlink:label="lab_tac_InvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Grade [Member]</link:label>
    <link:label id="lab_tac_InvestmentGradeMember_label_en-US" xlink:label="lab_tac_InvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Grade [Member]</link:label>
    <link:label id="lab_tac_InvestmentGradeMember_documentation_en-US" xlink:label="lab_tac_InvestmentGradeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Grade [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_InvestmentGradeMember" xlink:href="tac-20191231.xsd#tac_InvestmentGradeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_InvestmentGradeMember" xlink:to="lab_tac_InvestmentGradeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TransmissionMember_66d5c6f7-5314-4875-b2cb-9e743a7ce1da_terseLabel_en-US" xlink:label="lab_tac_TransmissionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transmission</link:label>
    <link:label id="lab_tac_TransmissionMember_label_en-US" xlink:label="lab_tac_TransmissionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transmission [Member]</link:label>
    <link:label id="lab_tac_TransmissionMember_documentation_en-US" xlink:label="lab_tac_TransmissionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transmission [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransmissionMember" xlink:href="tac-20191231.xsd#tac_TransmissionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransmissionMember" xlink:to="lab_tac_TransmissionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_377e7cf5-6e22-4220-8249-f6a7447c6847_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable and accrued liabilities</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other current payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayables" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TradeAndOtherCurrentPayables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables" xlink:to="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets_133ae54c-3065-4b19-951a-fcd5eb76136d_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on sale of assets (Note 4)</link:label>
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    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_297283f5-e1a3-4e0d-baa3-9fb3ca57bfb2_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income (loss) attributable to:</link:label>
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    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income attributable to [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ComprehensiveIncomeAttributableToAbstract"/>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_a586e68a-29fa-4455-9b64-0f6f7d61dc4d_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total items that will not be reclassified subsequently to net earnings</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income that will not be reclassified to profit or loss, net of tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:to="lab_ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations_b04eda02-ae5d-4d08-8cf1-3877a1413a19_negatedTerseLabel_en-US" xlink:label="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax recovery relating to reclassification of losses on financial instruments designed as hedges of divested foreign operations</link:label>
    <link:label id="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations_label_en-US" xlink:label="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Recovery) Relating To Reclassification Of Losses On Financial Instruments Designed As Hedges Of Divested Foreign Operations</link:label>
    <link:label id="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations_documentation_en-US" xlink:label="lab_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Expense (Recovery) Relating To Reclassification Of Losses On Financial Instruments Designed As Hedges Of Divested Foreign Operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations" xlink:href="tac-20191231.xsd#tac_IncomeTaxExpenseRecoveryRelatingToReclassificationOfLossesOnFinancialInstrumentsDesignedAsHedgesOfDivestedForeignOperations"/>
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    <link:label id="lab_tac_AcceleratedTaxDepreciation_873433dc-f2a5-403a-bbbd-2b98c54bdad5_terseLabel_en-US" xlink:label="lab_tac_AcceleratedTaxDepreciation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated tax depreciation</link:label>
    <link:label id="lab_tac_AcceleratedTaxDepreciation_label_en-US" xlink:label="lab_tac_AcceleratedTaxDepreciation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated Tax Depreciation</link:label>
    <link:label id="lab_tac_AcceleratedTaxDepreciation_documentation_en-US" xlink:label="lab_tac_AcceleratedTaxDepreciation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accelerated Tax Depreciation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AcceleratedTaxDepreciation" xlink:href="tac-20191231.xsd#tac_AcceleratedTaxDepreciation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AcceleratedTaxDepreciation" xlink:to="lab_tac_AcceleratedTaxDepreciation" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount_6326ba75-a468-4dbc-8daf-fd89b47ba6cd_terseLabel_en-US" xlink:label="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Termination of contractual arrangement, awarded amount</link:label>
    <link:label id="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount_label_en-US" xlink:label="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Compensation, Termination of Contractual Arrangement, Awarded, Amount</link:label>
    <link:label id="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount_documentation_en-US" xlink:label="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Compensation, Termination of Contractual Arrangement, Awarded, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:href="tac-20191231.xsd#tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:to="lab_tac_CounterpartyCompensationTerminationOfContractualArrangementAwardedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestExpenseOnFinanceLeases_75c46778-f637-4f46-85ae-f37c6b4f37d5_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnFinanceLeases" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest on finance lease obligations</link:label>
    <link:label id="lab_ifrs-full_InterestExpenseOnFinanceLeases_label_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnFinanceLeases" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on finance leases</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnFinanceLeases" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_InterestExpenseOnFinanceLeases"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestExpenseOnFinanceLeases" xlink:to="lab_ifrs-full_InterestExpenseOnFinanceLeases" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_c3a21e4d-7dd3-457e-baa0-ef0c9c3e100c_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_MiningPropertyMember_3de12095-db90-4943-b6db-afed63b29ddd_terseLabel_en-US" xlink:label="lab_ifrs-full_MiningPropertyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mining&#160;property and&#160;equipment</link:label>
    <link:label id="lab_ifrs-full_MiningPropertyMember_label_en-US" xlink:label="lab_ifrs-full_MiningPropertyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mining property [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MiningPropertyMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_MiningPropertyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MiningPropertyMember" xlink:to="lab_ifrs-full_MiningPropertyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_HedgingInstrumentLiabilities_3dae1ca8-1328-4118-9cef-48bdaacf222f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instrument, liabilities</link:label>
    <link:label id="lab_ifrs-full_HedgingInstrumentLiabilities_label_en-US" xlink:label="lab_ifrs-full_HedgingInstrumentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedging instrument, liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_HedgingInstrumentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HedgingInstrumentLiabilities" xlink:to="lab_ifrs-full_HedgingInstrumentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_da60022b-9b97-4f2d-8c78-85ab8adcf76b_terseLabel_en-US" xlink:label="lab_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decommissioning and other provisions (Note 21)</link:label>
    <link:label id="lab_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_label_en-US" xlink:label="lab_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current provision for decommissioning, restoration and rehabilitation costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:to="lab_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AssetAcquisitionLiabilitiesOther_2878a8ad-8343-464b-90f2-8ab382fcd8b9_terseLabel_en-US" xlink:label="lab_tac_AssetAcquisitionLiabilitiesOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_tac_AssetAcquisitionLiabilitiesOther_label_en-US" xlink:label="lab_tac_AssetAcquisitionLiabilitiesOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Liabilities, Other</link:label>
    <link:label id="lab_tac_AssetAcquisitionLiabilitiesOther_documentation_en-US" xlink:label="lab_tac_AssetAcquisitionLiabilitiesOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Liabilities, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AssetAcquisitionLiabilitiesOther" xlink:href="tac-20191231.xsd#tac_AssetAcquisitionLiabilitiesOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AssetAcquisitionLiabilitiesOther" xlink:to="lab_tac_AssetAcquisitionLiabilitiesOther" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RetirementPlanType1Axis_bc180a5c-8cf7-413d-8d4b-c703286c7613_terseLabel_en-US" xlink:label="lab_tac_RetirementPlanType1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type1 [Axis]</link:label>
    <link:label id="lab_tac_RetirementPlanType1Axis_label_en-US" xlink:label="lab_tac_RetirementPlanType1Axis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type1 [Axis]</link:label>
    <link:label id="lab_tac_RetirementPlanType1Axis_documentation_en-US" xlink:label="lab_tac_RetirementPlanType1Axis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retirement Plan Type1 [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RetirementPlanType1Axis" xlink:href="tac-20191231.xsd#tac_RetirementPlanType1Axis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RetirementPlanType1Axis" xlink:to="lab_tac_RetirementPlanType1Axis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_bf437aea-446f-4a0a-a19f-0618ca7158cc_terseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments from changes in ownership interests in subsidiaries that do not result in loss of control</link:label>
    <link:label id="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_label_en-US" xlink:label="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments from changes in ownership interests in subsidiaries that do not result in loss of control</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:to="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Discountedrevenue_e5e0dd9c-f9ec-4372-a733-5141b62c6f07_terseLabel_en-US" xlink:label="lab_tac_Discountedrevenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discounted revenue</link:label>
    <link:label id="lab_tac_Discountedrevenue_label_en-US" xlink:label="lab_tac_Discountedrevenue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discounted revenue</link:label>
    <link:label id="lab_tac_Discountedrevenue_documentation_en-US" xlink:label="lab_tac_Discountedrevenue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discounted Revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Discountedrevenue" xlink:href="tac-20191231.xsd#tac_Discountedrevenue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Discountedrevenue" xlink:to="lab_tac_Discountedrevenue" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PoplarCreekMember_6422aa44-3248-4025-8760-900c201a0504_terseLabel_en-US" xlink:label="lab_tac_PoplarCreekMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Poplar Creek</link:label>
    <link:label id="lab_tac_PoplarCreekMember_label_en-US" xlink:label="lab_tac_PoplarCreekMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Poplar Creek [Member]</link:label>
    <link:label id="lab_tac_PoplarCreekMember_documentation_en-US" xlink:label="lab_tac_PoplarCreekMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Poplar Creek [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PoplarCreekMember" xlink:href="tac-20191231.xsd#tac_PoplarCreekMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PoplarCreekMember" xlink:to="lab_tac_PoplarCreekMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NCIBProgramMember_a0ac0388-0b44-41cc-b3c2-ed36673a0d47_terseLabel_en-US" xlink:label="lab_tac_NCIBProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NCIB Program</link:label>
    <link:label id="lab_tac_NCIBProgramMember_label_en-US" xlink:label="lab_tac_NCIBProgramMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NCIB Program [Member]</link:label>
    <link:label id="lab_tac_NCIBProgramMember_documentation_en-US" xlink:label="lab_tac_NCIBProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NCIB Program [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NCIBProgramMember" xlink:href="tac-20191231.xsd#tac_NCIBProgramMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NCIBProgramMember" xlink:to="lab_tac_NCIBProgramMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Provisions_efb32866-24b6-4d28-aa25-5bdeb5db21df_terseLabel_en-US" xlink:label="lab_ifrs-full_Provisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision for uncertain tax positions</link:label>
    <link:label id="lab_ifrs-full_Provisions_label_en-US" xlink:label="lab_ifrs-full_Provisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Provisions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_Provisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Provisions" xlink:to="lab_ifrs-full_Provisions" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_UnitedStatesCoalMember_34fbbdb4-f0b8-427a-88db-18f593c70809_terseLabel_en-US" xlink:label="lab_tac_UnitedStatesCoalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United States Coal</link:label>
    <link:label id="lab_tac_UnitedStatesCoalMember_label_en-US" xlink:label="lab_tac_UnitedStatesCoalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United States Coal [Member]</link:label>
    <link:label id="lab_tac_UnitedStatesCoalMember_documentation_en-US" xlink:label="lab_tac_UnitedStatesCoalMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">United States Coal [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_UnitedStatesCoalMember" xlink:href="tac-20191231.xsd#tac_UnitedStatesCoalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_UnitedStatesCoalMember" xlink:to="lab_tac_UnitedStatesCoalMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_tac_Increasedecreaseindividendspaidtononcontrollinginterests_label_en-US" xlink:label="lab_tac_Increasedecreaseindividendspaidtononcontrollinginterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in dividends paid to non controlling interests</link:label>
    <link:label id="lab_tac_Increasedecreaseindividendspaidtononcontrollinginterests_documentation_en-US" xlink:label="lab_tac_Increasedecreaseindividendspaidtononcontrollinginterests" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in dividends paid to non controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Increasedecreaseindividendspaidtononcontrollinginterests" xlink:href="tac-20191231.xsd#tac_Increasedecreaseindividendspaidtononcontrollinginterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Increasedecreaseindividendspaidtononcontrollinginterests" xlink:to="lab_tac_Increasedecreaseindividendspaidtononcontrollinginterests" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ShareholderRightsPlanMember_bf893ccd-362c-4aab-b5a9-caca98e9f664_terseLabel_en-US" xlink:label="lab_tac_ShareholderRightsPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholder Rights Plan</link:label>
    <link:label id="lab_tac_ShareholderRightsPlanMember_label_en-US" xlink:label="lab_tac_ShareholderRightsPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholder Rights Plan [Member]</link:label>
    <link:label id="lab_tac_ShareholderRightsPlanMember_documentation_en-US" xlink:label="lab_tac_ShareholderRightsPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shareholder Rights Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ShareholderRightsPlanMember" xlink:href="tac-20191231.xsd#tac_ShareholderRightsPlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ShareholderRightsPlanMember" xlink:to="lab_tac_ShareholderRightsPlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialLiabilities_b0885fad-766b-40b0-9387-9910fdc32b52_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilities_37677250-adb8-4d22-84e4-4986503844a2_verboseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilities" xlink:to="lab_ifrs-full_FinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable_4edeb9d1-a062-4cf0-8423-056b5bf85f20_terseLabel_en-US" xlink:label="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accretion</link:label>
    <link:label id="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable_label_en-US" xlink:label="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase Through Adjustments Arising From Passage Of Time, Other Provisions, Net Of Receivable</link:label>
    <link:label id="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable_documentation_en-US" xlink:label="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase Through Adjustments Arising From Passage Of Time, Other Provisions, Net Of Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:href="tac-20191231.xsd#tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:to="lab_tac_IncreaseThroughAdjustmentsArisingFromPassageOfTimeOtherProvisionsNetOfReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable_4ea259bd-b182-4e4b-99e7-0ffb404d252f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:to="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalLineItems_eba7319a-6c52-497b-bf75-bd0e5f30fcbb_terseLabel_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of capital [Line Items]</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalLineItems_label_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of components of capital [Line Items]</link:label>
    <link:label id="lab_tac_DisclosureofcomponentsofcapitalLineItems_documentation_en-US" xlink:label="lab_tac_DisclosureofcomponentsofcapitalLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">[Line Items] for disclosure of components of capital [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofcomponentsofcapitalLineItems" xlink:href="tac-20191231.xsd#tac_DisclosureofcomponentsofcapitalLineItems"/>
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    <link:label id="lab_ifrs-full_RestatedMember_0104c955-93d9-4f60-b757-4cb5876ac13f_terseLabel_en-US" xlink:label="lab_ifrs-full_RestatedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currently stated [member]</link:label>
    <link:label id="lab_ifrs-full_RestatedMember_label_en-US" xlink:label="lab_ifrs-full_RestatedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currently stated [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestatedMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_RestatedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RestatedMember" xlink:to="lab_ifrs-full_RestatedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_SharebasedpaymentarrangementsAbstract_e42e3e4e-8951-4ee9-8426-63aceb78019d_terseLabel_en-US" xlink:label="lab_tac_SharebasedpaymentarrangementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangements [Abstract]</link:label>
    <link:label id="lab_tac_SharebasedpaymentarrangementsAbstract_label_en-US" xlink:label="lab_tac_SharebasedpaymentarrangementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangements [Abstract]</link:label>
    <link:label id="lab_tac_SharebasedpaymentarrangementsAbstract_documentation_en-US" xlink:label="lab_tac_SharebasedpaymentarrangementsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_SharebasedpaymentarrangementsAbstract" xlink:href="tac-20191231.xsd#tac_SharebasedpaymentarrangementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SharebasedpaymentarrangementsAbstract" xlink:to="lab_tac_SharebasedpaymentarrangementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccountingEstimatesMember_701ebd24-602d-42b9-871a-3fed041684d0_terseLabel_en-US" xlink:label="lab_ifrs-full_AccountingEstimatesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting estimates [member]</link:label>
    <link:label id="lab_ifrs-full_AccountingEstimatesMember_label_en-US" xlink:label="lab_ifrs-full_AccountingEstimatesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting estimates [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccountingEstimatesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AccountingEstimatesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccountingEstimatesMember" xlink:to="lab_ifrs-full_AccountingEstimatesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock_2204b6da-f283-42ff-94ff-894494448a3e_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregate current and deferred income tax related to items charged or credited to equity</link:label>
    <link:label id="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Current And Deferred Income Tax Items Charged To Equity [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Current And Deferred Income Tax Items Charged To Equity [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:to="lab_tac_DisclosureOfCurrentAndDeferredIncomeTaxItemsChargedToEquityTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_ReplacementandRefurbishmentMember_470cc8f4-3b14-481e-b1fd-f3ac5d8865e8_terseLabel_en-US" xlink:label="lab_tac_ReplacementandRefurbishmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Replacement and Refurbishment [Member]</link:label>
    <link:label id="lab_tac_ReplacementandRefurbishmentMember_label_en-US" xlink:label="lab_tac_ReplacementandRefurbishmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Replacement and Refurbishment [Member]</link:label>
    <link:label id="lab_tac_ReplacementandRefurbishmentMember_documentation_en-US" xlink:label="lab_tac_ReplacementandRefurbishmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Replacement and Refurbishment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_ReplacementandRefurbishmentMember" xlink:href="tac-20191231.xsd#tac_ReplacementandRefurbishmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_ReplacementandRefurbishmentMember" xlink:to="lab_tac_ReplacementandRefurbishmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis_011706c6-6e84-417d-8be1-42ee4ab1a656_terseLabel_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [axis]</link:label>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis_label_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:to="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IntangibleAssetsUnderDevelopmentMember_bbbf9c82-5996-4a91-bd53-c8c850429f10_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsUnderDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangibles under development</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsUnderDevelopmentMember_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsUnderDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets under development [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsUnderDevelopmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_IntangibleAssetsUnderDevelopmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IntangibleAssetsUnderDevelopmentMember" xlink:to="lab_ifrs-full_IntangibleAssetsUnderDevelopmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Longterm1Member_4097bcfa-9616-4bf1-8b3d-65f7646c6601_terseLabel_en-US" xlink:label="lab_tac_Longterm1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term</link:label>
    <link:label id="lab_tac_Longterm1Member_label_en-US" xlink:label="lab_tac_Longterm1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term1 [Member]</link:label>
    <link:label id="lab_tac_Longterm1Member_documentation_en-US" xlink:label="lab_tac_Longterm1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Longterm1Member" xlink:href="tac-20191231.xsd#tac_Longterm1Member"/>
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    <link:label id="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory_8f6066d7-947e-49aa-86b0-cd1889b2e39c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Shares</link:label>
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    <link:label id="lab_tac_BorrowingsSubjectToFloatingInterestRates_ec32a381-6d96-4898-baea-4621361a7a2b_terseLabel_en-US" xlink:label="lab_tac_BorrowingsSubjectToFloatingInterestRates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings subject to floating interest rates</link:label>
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    <link:label id="lab_tac_BorrowingsSubjectToFloatingInterestRates_documentation_en-US" xlink:label="lab_tac_BorrowingsSubjectToFloatingInterestRates" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings Subject To Floating Interest Rates</link:label>
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    <link:label id="lab_ifrs-full_ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts_1ebed5fe-853c-4391-83ca-9df95c2ef42c_terseLabel_en-US" xlink:label="lab_ifrs-full_ExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bonds issued</link:label>
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    <link:label id="lab_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_f16484d9-b158-4b2c-bad8-11e18669c974_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest cost</link:label>
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    <link:label id="lab_tac_BelowBBBRatingMember_b2a66b73-091d-4632-8f4b-0d41f9d57348_terseLabel_en-US" xlink:label="lab_tac_BelowBBBRatingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Below BBB</link:label>
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    <link:label id="lab_ifrs-full_Borrowings_81e3642d-8667-4d59-bcc3-1460468ed6e2_terseLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings</link:label>
    <link:label id="lab_ifrs-full_Borrowings_e0c101c9-9fb7-4bbf-913a-8a128455fed1_verboseLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value</link:label>
    <link:label id="lab_ifrs-full_Borrowings_label_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings</link:label>
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    <link:label id="lab_tac_NoncurrentDefinedBenefitObligationAndOtherLongtermLiabilities_cb2cd5e1-5ef2-4f4c-af78-b007fc1612af_terseLabel_en-US" xlink:label="lab_tac_NoncurrentDefinedBenefitObligationAndOtherLongtermLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Defined benefit obligation and other long-term liabilities (Note 23)</link:label>
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    <link:label id="lab_tac_ConvertiblePreferredSharesTenderedForConversion_8bbd93b7-d9ae-4e1f-ae22-38db0e7b7d18_terseLabel_en-US" xlink:label="lab_tac_ConvertiblePreferredSharesTenderedForConversion" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible preferred shares tendered for conversion</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_ConvertiblePreferredSharesTenderedForConversion" xlink:href="tac-20191231.xsd#tac_ConvertiblePreferredSharesTenderedForConversion"/>
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    <link:label id="lab_ifrs-full_LiabilitiesArisingFromFinancingActivities_8f4e6140-de24-4601-80ef-b01b320a636c_periodStartLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of the period</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeExplanatory_ce0031d1-ffe6-404c-a8c3-df82f93a879d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of amounts payable for mining assets and other finance leases</link:label>
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    <link:label id="lab_ifrs-full_ConsiderationPaidReceived_b136a111-b007-4e31-9722-c3ff48b34a2c_verboseLabel_en-US" xlink:label="lab_ifrs-full_ConsiderationPaidReceived" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration paid (received)</link:label>
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    <link:label id="lab_tac_AlbertaMineMember_5a0b2b37-52ec-40e3-b893-2855412d637a_terseLabel_en-US" xlink:label="lab_tac_AlbertaMineMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta Mine</link:label>
    <link:label id="lab_tac_AlbertaMineMember_label_en-US" xlink:label="lab_tac_AlbertaMineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta Mine [Member]</link:label>
    <link:label id="lab_tac_AlbertaMineMember_documentation_en-US" xlink:label="lab_tac_AlbertaMineMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Alberta Mine [Member]</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossBeforeTax_c1847ae1-ba52-4761-8d79-89104c72d814_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings (loss) before income taxes</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossBeforeTax_label_en-US" xlink:label="lab_ifrs-full_ProfitLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss) before tax</link:label>
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    <link:label id="lab_ifrs-full_ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract_98659854-c302-4e05-8cbb-e43cfc950133_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in income taxes resulting from:</link:label>
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    <link:label id="lab_tac_EquityAdjustedBalance_92129537-4bd3-4269-9273-7f58be0ac7be_terseLabel_en-US" xlink:label="lab_tac_EquityAdjustedBalance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjusted beginning balance</link:label>
    <link:label id="lab_tac_EquityAdjustedBalance_label_en-US" xlink:label="lab_tac_EquityAdjustedBalance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity, Adjusted Balance</link:label>
    <link:label id="lab_tac_EquityAdjustedBalance_documentation_en-US" xlink:label="lab_tac_EquityAdjustedBalance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity, Adjusted Balance</link:label>
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    <link:label id="lab_tac_LeaseIncomeMember_b2cfb964-ecea-49ce-9f94-103e0340544e_terseLabel_en-US" xlink:label="lab_tac_LeaseIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Income [Member]</link:label>
    <link:label id="lab_tac_LeaseIncomeMember_label_en-US" xlink:label="lab_tac_LeaseIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Income [Member]</link:label>
    <link:label id="lab_tac_LeaseIncomeMember_documentation_en-US" xlink:label="lab_tac_LeaseIncomeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Income [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LeaseIncomeMember" xlink:href="tac-20191231.xsd#tac_LeaseIncomeMember"/>
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    <link:label id="lab_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember_0f689503-41d3-4f4c-bb09-a19deaa9f840_terseLabel_en-US" xlink:label="lab_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Siemens F Class Gas Turbines And Related Equipment</link:label>
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    <link:label id="lab_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember_documentation_en-US" xlink:label="lab_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Siemens F Class Gas Turbines And Related Equipment</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember" xlink:to="lab_tac_SiemensFClassGasTurbinesAndRelatedEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsInvestingActivities_2df8bf2a-c1a3-4a97-bc80-d2eca502a43b_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense on Solomon disposition (Note 4 and 11)</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes paid (refund), classified as investing activities</link:label>
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    <link:label id="lab_ifrs-full_LongtermContractsMember_2fa109ef-b0c3-4e31-bcd6-67d5eb8090a2_terseLabel_en-US" xlink:label="lab_ifrs-full_LongtermContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term contracts</link:label>
    <link:label id="lab_ifrs-full_LongtermContractsMember_label_en-US" xlink:label="lab_ifrs-full_LongtermContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term contracts [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermContractsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LongtermContractsMember"/>
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    <link:label id="lab_tac_LongtermDebt1Member_3b5c0b9f-1196-45c5-a2c6-e63f0e10cdb8_terseLabel_en-US" xlink:label="lab_tac_LongtermDebt1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_tac_LongtermDebt1Member_label_en-US" xlink:label="lab_tac_LongtermDebt1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt1 [Member]</link:label>
    <link:label id="lab_tac_LongtermDebt1Member_documentation_en-US" xlink:label="lab_tac_LongtermDebt1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongtermDebt1Member" xlink:href="tac-20191231.xsd#tac_LongtermDebt1Member"/>
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    <link:label id="lab_ifrs-full_AverageForeignExchangeRate_a51e1506-98d1-4bf4-84f3-2e2369c5dc79_terseLabel_en-US" xlink:label="lab_ifrs-full_AverageForeignExchangeRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Average foreign exchange rate</link:label>
    <link:label id="lab_ifrs-full_AverageForeignExchangeRate_label_en-US" xlink:label="lab_ifrs-full_AverageForeignExchangeRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Average foreign exchange rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AverageForeignExchangeRate" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AverageForeignExchangeRate"/>
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    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions_355f3dd6-878f-4cd7-bfba-34a7ae884d98_terseLabel_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of outstanding share options (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions_label_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of outstanding share options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ExercisePriceOfOutstandingShareOptions"/>
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    <link:label id="lab_tac_CumulativeGainsLossInDerivativeInstruments_0a0084d6-d91a-42da-8372-e84c21a08f10_terseLabel_en-US" xlink:label="lab_tac_CumulativeGainsLossInDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative gains (loss) in derivative instruments</link:label>
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    <link:label id="lab_tac_CumulativeGainsLossInDerivativeInstruments_documentation_en-US" xlink:label="lab_tac_CumulativeGainsLossInDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative Gains (Loss) In Derivative Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CumulativeGainsLossInDerivativeInstruments" xlink:href="tac-20191231.xsd#tac_CumulativeGainsLossInDerivativeInstruments"/>
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    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_9e4fab78-a7fe-4682-9b33-bed3b486df55_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [member]</link:label>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_label_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
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    <link:label id="lab_tac_RegisteredPensionPlanMember_76595a51-a082-405b-b789-66b733733d10_verboseLabel_en-US" xlink:label="lab_tac_RegisteredPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Registered</link:label>
    <link:label id="lab_tac_RegisteredPensionPlanMember_10fd46f1-9cef-4fcf-81e3-8278711b1d75_terseLabel_en-US" xlink:label="lab_tac_RegisteredPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Registered Pension Plan</link:label>
    <link:label id="lab_tac_RegisteredPensionPlanMember_label_en-US" xlink:label="lab_tac_RegisteredPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Registered Pension Plan [Member]</link:label>
    <link:label id="lab_tac_RegisteredPensionPlanMember_documentation_en-US" xlink:label="lab_tac_RegisteredPensionPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Registered Pension Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RegisteredPensionPlanMember" xlink:href="tac-20191231.xsd#tac_RegisteredPensionPlanMember"/>
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    <link:label id="lab_tac_A5.69NonRecourseDebentureDue2016Member_234fb73b-ab02-494e-8422-43c1492e6b1d_terseLabel_en-US" xlink:label="lab_tac_A5.69NonRecourseDebentureDue2016Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.69% Non-Recourse Debenture due 2016</link:label>
    <link:label id="lab_tac_A5.69NonRecourseDebentureDue2016Member_label_en-US" xlink:label="lab_tac_A5.69NonRecourseDebentureDue2016Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.69% Non-Recourse Debenture Due 2016 [Member]</link:label>
    <link:label id="lab_tac_A5.69NonRecourseDebentureDue2016Member_documentation_en-US" xlink:label="lab_tac_A5.69NonRecourseDebentureDue2016Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.69% Non-Recourse Debenture Due 2016 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_A5.69NonRecourseDebentureDue2016Member" xlink:href="tac-20191231.xsd#tac_A5.69NonRecourseDebentureDue2016Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_A5.69NonRecourseDebentureDue2016Member" xlink:to="lab_tac_A5.69NonRecourseDebentureDue2016Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsTable_42d1d50e-f95a-4f51-be23-cb87341f94b0_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of types of insurance contracts [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTypesOfInsuranceContractsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of types of insurance contracts [table]</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_b8f731c8-88dc-4a82-9a9a-45cb5a05b84d_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in non-cash operating working capital balances (Note 30)</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_151d8daf-8734-4c8d-b62d-9ca30ab3d26b_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in working capital</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_c141f35f-23e3-4757-8a9b-606a2a91781e_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in non-cash operating working capital balances</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in working capital</link:label>
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    <link:label id="lab_tac_NoncurrentDeferredLicenseFees_0be9c1ca-35a5-4a1f-8ea2-f8b4135e2cd1_terseLabel_en-US" xlink:label="lab_tac_NoncurrentDeferredLicenseFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred licence fees</link:label>
    <link:label id="lab_tac_NoncurrentDeferredLicenseFees_label_en-US" xlink:label="lab_tac_NoncurrentDeferredLicenseFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current Deferred License Fees</link:label>
    <link:label id="lab_tac_NoncurrentDeferredLicenseFees_documentation_en-US" xlink:label="lab_tac_NoncurrentDeferredLicenseFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current Deferred License Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NoncurrentDeferredLicenseFees" xlink:href="tac-20191231.xsd#tac_NoncurrentDeferredLicenseFees"/>
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    <link:label id="lab_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities_f98b5909-42d0-496a-9472-e5dfcbf3fb1f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loan receivable (Note 20)</link:label>
    <link:label id="lab_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash advances and loans made to other parties, classified as investing activities</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_5f149341-24a5-4600-9331-fd06d24a5997_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other tax effects for reconciliation between accounting profit and tax expense (income)</link:label>
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    <link:label id="lab_tac_EmployeeSharePurchasePlanMember_e10b40fb-dbc1-4862-82fa-bdd147698776_terseLabel_en-US" xlink:label="lab_tac_EmployeeSharePurchasePlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Share Purchase Plan</link:label>
    <link:label id="lab_tac_EmployeeSharePurchasePlanMember_label_en-US" xlink:label="lab_tac_EmployeeSharePurchasePlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Share Purchase Plan [Member]</link:label>
    <link:label id="lab_tac_EmployeeSharePurchasePlanMember_documentation_en-US" xlink:label="lab_tac_EmployeeSharePurchasePlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Share Purchase Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_EmployeeSharePurchasePlanMember" xlink:href="tac-20191231.xsd#tac_EmployeeSharePurchasePlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_EmployeeSharePurchasePlanMember" xlink:to="lab_tac_EmployeeSharePurchasePlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_invest_InvestmentLineItems_4af9e78f-793b-4cc6-93fc-1a1c85cf4fd8_terseLabel_en-US" xlink:label="lab_invest_InvestmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Line Items]</link:label>
    <link:label id="lab_invest_InvestmentLineItems_label_en-US" xlink:label="lab_invest_InvestmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_invest_InvestmentLineItems" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentLineItems" xlink:to="lab_invest_InvestmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_33fb5cc2-c445-4e15-a1ca-f679302849e9_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta shareholders</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to owners of parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:to="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CoalSupplyandMiningObligation_c973052e-d6eb-4247-aaaf-63c4ae13ccfe_terseLabel_en-US" xlink:label="lab_tac_CoalSupplyandMiningObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal supply and mining agreements</link:label>
    <link:label id="lab_tac_CoalSupplyandMiningObligation_label_en-US" xlink:label="lab_tac_CoalSupplyandMiningObligation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal Supply and Mining Obligation</link:label>
    <link:label id="lab_tac_CoalSupplyandMiningObligation_documentation_en-US" xlink:label="lab_tac_CoalSupplyandMiningObligation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal Supply and Mining Obligation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CoalSupplyandMiningObligation" xlink:href="tac-20191231.xsd#tac_CoalSupplyandMiningObligation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CoalSupplyandMiningObligation" xlink:to="lab_tac_CoalSupplyandMiningObligation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract_85794868-2af9-4129-96e6-19eae013cb57_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of comprehensive income [abstract]</link:label>
    <link:label id="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of comprehensive income [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_StatementOfComprehensiveIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_00e031fe-fdfc-4fdf-aa22-902e22518e40_totalLabel_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total acquisition cost</link:label>
    <link:label id="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_label_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Assets Acquired and Liabilities Assumed, Net</link:label>
    <link:label id="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet_documentation_en-US" xlink:label="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition, Assets Acquired and Liabilities Assumed, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:href="tac-20191231.xsd#tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:to="lab_tac_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract_323cfef3-4981-452a-a993-5d8dd82b1e20_terseLabel_en-US" xlink:label="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate Information and Statement of IFRS Compliance [Abstract]</link:label>
    <link:label id="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract_label_en-US" xlink:label="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate Information and Statement of IFRS Compliance [Abstract]</link:label>
    <link:label id="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract_documentation_en-US" xlink:label="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporate Information and Statement of IFRS Compliance [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:href="tac-20191231.xsd#tac_CorporateInformationandStatementofIFRSComplianceAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:to="lab_tac_CorporateInformationandStatementofIFRSComplianceAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember_ff18b215-5bcc-4f96-9236-1d6daa452fb4_terseLabel_en-US" xlink:label="lab_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net investment hedges</link:label>
    <link:label id="lab_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember_label_en-US" xlink:label="lab_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedges of net investment in foreign operations [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember" xlink:to="lab_ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_09e71680-be2b-4275-ad6b-30ca884faeb3_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) operating activities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation_29d61a33-abe8-498b-843a-3182f3e23af8_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provincial health-care premium escalation</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumption of expected rates of inflation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:to="lab_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentPrepayments_d38d35da-b05d-49c3-b081-ba2f70e0ee4f_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentPrepayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term prepaids and other assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentPrepayments_label_en-US" xlink:label="lab_ifrs-full_NoncurrentPrepayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current prepayments</link:label>
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    <link:label id="lab_tac_AssetAcquisitionAxis_3761ed29-7626-462b-af97-169c6eb1a995_terseLabel_en-US" xlink:label="lab_tac_AssetAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition [Axis]</link:label>
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    <link:label id="lab_tac_AssetAcquisitionAxis_documentation_en-US" xlink:label="lab_tac_AssetAcquisitionAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Asset Acquisition</link:label>
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    <link:label id="lab_ifrs-full_HedgedItemsMember_label_en-US" xlink:label="lab_ifrs-full_HedgedItemsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedged items [member]</link:label>
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    <link:label id="lab_ifrs-full_CurrentRestrictedCashAndCashEquivalents_6bb39562-9d9e-477f-a7e9-9fa01ec826ff_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentRestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_42795ea0-304d-4258-a079-685447e1852b_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income tax liabilities (Note 11)</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_8d5a2b19-dfad-4697-adab-c6ce46abd1cc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of reconciliation of changes in intangible assets and goodwill [line items]</link:label>
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    <link:label id="lab_tac_ProceedsFromTaxEquityFunding_a21d779f-1b56-4d48-afde-5503e82dc97f_terseLabel_en-US" xlink:label="lab_tac_ProceedsFromTaxEquityFunding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from tax equity funding</link:label>
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    <link:label id="lab_ifrs-full_GrossFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements_33746132-b106-44e1-a978-69ec19e3347b_terseLabel_en-US" xlink:label="lab_ifrs-full_GrossFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross financial assets subject to offsetting, enforceable master netting arrangements or similar agreements</link:label>
    <link:label id="lab_ifrs-full_GrossFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements_label_en-US" xlink:label="lab_ifrs-full_GrossFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross financial assets subject to offsetting, enforceable master netting arrangements or similar agreements</link:label>
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    <link:label id="lab_ifrs-full_WritedownsReversalsOfInventories_739710a0-597d-4e39-8b9c-8aa65472b923_terseLabel_en-US" xlink:label="lab_ifrs-full_WritedownsReversalsOfInventories" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal inventory writedown (recovery)</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions_5540f55c-a6b0-419f-96e7-1fb71fef2e46_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in foreign exchange rates</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfHedgeAccountingTable_4ea83c92-0da8-4ab3-a3ed-d4c4575403fd_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfHedgeAccountingTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about hedges [table]</link:label>
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    <link:label id="lab_tac_A5.9UnsecuredCommercialLoanObligationDue2023Member_e686d26f-d593-4b43-a16f-7f460f0c9239_terseLabel_en-US" xlink:label="lab_tac_A5.9UnsecuredCommercialLoanObligationDue2023Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">5.9% Unsecured Commercial Loan Obligation due 2023</link:label>
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    <link:label id="lab_ifrs-full_TypesOfHedgesMember_d206eb31-55e5-42b3-810f-464127e811c3_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfHedgesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedges [member]</link:label>
    <link:label id="lab_ifrs-full_TypesOfHedgesMember_label_en-US" xlink:label="lab_ifrs-full_TypesOfHedgesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Hedges [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfHedgesMember"/>
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    <link:label id="lab_ifrs-full_Level1OfFairValueHierarchyMember_2d706807-1758-4db6-ac23-a50351084180_verboseLabel_en-US" xlink:label="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level I</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_e1779d9b-149f-4ebc-bd99-55a2beefc5c4_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on change in fair value of derivatives</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_61d531ea-808d-46ff-888b-b6738e621a4b_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net actuarial gains (losses) on defined benefit plans, net of tax</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_TaxEquityFunding" xlink:href="tac-20191231.xsd#tac_TaxEquityFunding"/>
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    <link:label id="lab_tac_ParentCompanyandTransAltaRenewablesInc.Member_111ebadc-90da-4629-9641-bcb0cdcaa3b2_terseLabel_en-US" xlink:label="lab_tac_ParentCompanyandTransAltaRenewablesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Corporation and TransAlta Renewables</link:label>
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    <link:label id="lab_ifrs-full_RiskExposureAssociatedWithInstrumentsSharingCharacteristic_bbe01acc-4252-4912-ba6a-76d80c85f0a4_terseLabel_en-US" xlink:label="lab_ifrs-full_RiskExposureAssociatedWithInstrumentsSharingCharacteristic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risk exposure associated with instruments sharing characteristic</link:label>
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    <link:label id="lab_srt_MinimumMember_e9a60d0e-7a0e-4022-b95b-f2a93f4fe1b7_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
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    <link:label id="lab_ifrs-full_CashEquivalents_e21d003e-3296-4d12-a741-45c5afd35919_terseLabel_en-US" xlink:label="lab_ifrs-full_CashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash equivalents</link:label>
    <link:label id="lab_ifrs-full_CashEquivalents_label_en-US" xlink:label="lab_ifrs-full_CashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash equivalents</link:label>
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    <link:label id="lab_tac_Currency1Axis_905607d2-7680-43c0-a0c5-efadf662a0ec_terseLabel_en-US" xlink:label="lab_tac_Currency1Axis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Currency1 [Axis]</link:label>
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    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_b431979e-18a7-4a60-88b3-3e5c0998016e_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
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    <link:label id="lab_ifrs-full_CostOfPurchasedEnergySold_0a7dce22-688d-4bdb-ab9e-535ffbf18c1e_terseLabel_en-US" xlink:label="lab_ifrs-full_CostOfPurchasedEnergySold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchased power</link:label>
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    <link:label id="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember_e74fe089-ea77-45d4-9643-95790a79dd02_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reserve of remeasurements of defined benefit plans [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:to="lab_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings_2cb77188-980a-4b7c-8857-90c82c99e829_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net increase (decrease) in borrowings under credit facilities (Note 22)</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) increase (decrease) in current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:to="lab_ifrs-full_CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ContractualCapitalCommitments_74b7f0a6-7410-441e-b0e1-c86836885718_terseLabel_en-US" xlink:label="lab_ifrs-full_ContractualCapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Growth</link:label>
    <link:label id="lab_ifrs-full_ContractualCapitalCommitments_label_en-US" xlink:label="lab_ifrs-full_ContractualCapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contractual capital commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractualCapitalCommitments" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ContractualCapitalCommitments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContractualCapitalCommitments" xlink:to="lab_ifrs-full_ContractualCapitalCommitments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_eae5ee46-875f-479e-bd72-4daf268289f8_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of sensitivity analysis for actuarial assumptions [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of sensitivity analysis for actuarial assumptions [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems"/>
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    <link:label id="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume_d841f2ab-b4fd-45bd-a875-41cbf10e7879_terseLabel_en-US" xlink:label="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term fixed price power sale contract, delivery volume</link:label>
    <link:label id="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume_label_en-US" xlink:label="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Fixed Price Power Sale Contract, Delivery Volume</link:label>
    <link:label id="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume_documentation_en-US" xlink:label="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Fixed Price Power Sale Contract, Delivery Volume</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:href="tac-20191231.xsd#tac_LongtermFixedPricePowerSaleContractDeliveryVolume"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:to="lab_tac_LongtermFixedPricePowerSaleContractDeliveryVolume" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_4119bcd4-5baf-45c2-9aea-a5096b20e8d8_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets</link:label>
    <link:label id="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember_label_en-US" xlink:label="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other property, plant and equipment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:to="lab_ifrs-full_OtherPropertyPlantAndEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember_5f7a328d-c31d-4093-a103-5361d86eadcf_terseLabel_en-US" xlink:label="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving committed syndicated bank facility</link:label>
    <link:label id="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember_label_en-US" xlink:label="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revolving Committed Syndicated Bank Facility [Member]</link:label>
    <link:label id="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember_documentation_en-US" xlink:label="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Syndicated Bank Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:href="tac-20191231.xsd#tac_RevolvingCommittedSyndicatedBankFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:to="lab_tac_RevolvingCommittedSyndicatedBankFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BorrowingsInterestRate_a3ebf5be-fa56-42d1-ab98-b6bac5b4d50f_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate</link:label>
    <link:label id="lab_ifrs-full_BorrowingsInterestRate_label_en-US" xlink:label="lab_ifrs-full_BorrowingsInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, interest rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsInterestRate" xlink:to="lab_ifrs-full_BorrowingsInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_Adjustmentsforincometaxpayable_81426794-bdc5-44a9-b67b-fc191584b14c_negatedTerseLabel_en-US" xlink:label="lab_tac_Adjustmentsforincometaxpayable" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes payable</link:label>
    <link:label id="lab_tac_Adjustmentsforincometaxpayable_label_en-US" xlink:label="lab_tac_Adjustmentsforincometaxpayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for income tax payable</link:label>
    <link:label id="lab_tac_Adjustmentsforincometaxpayable_documentation_en-US" xlink:label="lab_tac_Adjustmentsforincometaxpayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for income tax payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_Adjustmentsforincometaxpayable" xlink:href="tac-20191231.xsd#tac_Adjustmentsforincometaxpayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_Adjustmentsforincometaxpayable" xlink:to="lab_tac_Adjustmentsforincometaxpayable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionalPaidinCapitalMember_81133dbc-d7a0-4aa4-a36a-bd558f9024e2_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionalPaidinCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed surplus</link:label>
    <link:label id="lab_ifrs-full_AdditionalPaidinCapitalMember_label_en-US" xlink:label="lab_ifrs-full_AdditionalPaidinCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional paid-in capital [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionalPaidinCapitalMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_AdditionalPaidinCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionalPaidinCapitalMember" xlink:to="lab_ifrs-full_AdditionalPaidinCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_ce6c60b8-ae55-4852-bff3-0c9d15435e57_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, class [member]</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, class [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember" xlink:to="lab_ifrs-full_FinancialLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_TransAltaCogenerationL.P.Member_cc360dd6-e4c4-4092-9570-cf054a173410_terseLabel_en-US" xlink:label="lab_tac_TransAltaCogenerationL.P.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Cogeneration L.P.</link:label>
    <link:label id="lab_tac_TransAltaCogenerationL.P.Member_label_en-US" xlink:label="lab_tac_TransAltaCogenerationL.P.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Cogeneration L.P. [Member]</link:label>
    <link:label id="lab_tac_TransAltaCogenerationL.P.Member_documentation_en-US" xlink:label="lab_tac_TransAltaCogenerationL.P.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">TransAlta Cogeneration L.P. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_TransAltaCogenerationL.P.Member" xlink:href="tac-20191231.xsd#tac_TransAltaCogenerationL.P.Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_TransAltaCogenerationL.P.Member" xlink:to="lab_tac_TransAltaCogenerationL.P.Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_c61b0fa8-4a78-4206-92c3-5c5c73656f29_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NewIFRSsAxis_8121dfbb-aaff-4152-adb5-2e9f1fca63cf_terseLabel_en-US" xlink:label="lab_ifrs-full_NewIFRSsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [axis]</link:label>
    <link:label id="lab_ifrs-full_NewIFRSsAxis_label_en-US" xlink:label="lab_ifrs-full_NewIFRSsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New IFRSs [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewIFRSsAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_NewIFRSsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NewIFRSsAxis" xlink:to="lab_ifrs-full_NewIFRSsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TaxContingentLiabilityMember_cc5b4c68-1ae4-4805-a2a2-8c18376a5696_terseLabel_en-US" xlink:label="lab_ifrs-full_TaxContingentLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Uncertain tax positions</link:label>
    <link:label id="lab_ifrs-full_TaxContingentLiabilityMember_label_en-US" xlink:label="lab_ifrs-full_TaxContingentLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax contingent liability [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TaxContingentLiabilityMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TaxContingentLiabilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TaxContingentLiabilityMember" xlink:to="lab_ifrs-full_TaxContingentLiabilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EntitysTotalForJointOperationsMember_b6e0cc46-bced-42c4-8995-112cb50cf9d8_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForJointOperationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for joint operations [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForJointOperationsMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForJointOperationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for joint operations [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForJointOperationsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_EntitysTotalForJointOperationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForJointOperationsMember" xlink:to="lab_ifrs-full_EntitysTotalForJointOperationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock_56a0a2d0-7039-4678-96e9-17669bb9a322_terseLabel_en-US" xlink:label="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of selected consolidated statements of financial position information</link:label>
    <link:label id="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock_label_en-US" xlink:label="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of selected consolidated statements of financial position information [Table Text Block]</link:label>
    <link:label id="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock_documentation_en-US" xlink:label="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of selected consolidated statements of financial position information [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:href="tac-20191231.xsd#tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:to="lab_tac_DisclosureofselectedconsolidatedstatementsoffinancialpositioninformationTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromCurrentBorrowings_c0995ed8-2dc3-42e4-87eb-a8d9e7c74e51_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of long-term debt (Note 22)</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromCurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from current borrowings</link:label>
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    <link:label id="lab_srt_StatementGeographicalAxis_c426c0d0-ea12-4dc6-b2d7-b43ae8c42845_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical [Axis]</link:label>
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    <link:label id="lab_tac_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTableTextBlock_25833e85-dfa4-4792-9332-0fa4f80ed299_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disaggregation Of Revenue</link:label>
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    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember_81bda1c0-887a-4a07-bb7f-63cb70ac3ac0_terseLabel_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign exchange forward contracts &#8211; foreign-denominated receipts/expenditures</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember_label_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Receipts (Expenditures) [Member]</link:label>
    <link:label id="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember_documentation_en-US" xlink:label="lab_tac_ForeignExchangeForwardContractsForeignDenominatedReceiptsExpendituresMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Exchange Forward Contracts, Foreign-Denominated Receipts (Expenditures) [Member]</link:label>
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    <link:label id="lab_tac_DerivativeInstrumentsExistingContractsMember_documentation_en-US" xlink:label="lab_tac_DerivativeInstrumentsExistingContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Instruments, Existing Contracts [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_DerivativeInstrumentsExistingContractsMember" xlink:href="tac-20191231.xsd#tac_DerivativeInstrumentsExistingContractsMember"/>
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    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncome_747862fb-8a50-45e9-b747-5fa1ce5fad25_verboseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income tax recovery</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax expense (income)</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeAbstract_87ed6979-6930-42a0-9875-6a7846540b5a_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other comprehensive income [abstract]</link:label>
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    <link:label id="lab_ifrs-full_CurrentFuel_7e09832c-2ce5-4e31-85ec-bb874ce1205b_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentFuel" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Coal</link:label>
    <link:label id="lab_ifrs-full_CurrentFuel_label_en-US" xlink:label="lab_ifrs-full_CurrentFuel" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current fuel</link:label>
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    <link:label id="lab_dei_EntityCurrentReportingStatus_be2879d4-53c5-43c5-bef0-7ce1caf41c71_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
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    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption_050eca69-884d-4421-a9fc-0681b1240f86_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible increase in actuarial assumption (as percent)</link:label>
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    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_b60ca517-e705-4f6e-9df8-c9704220233a_negatedLabel_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, right-of-use assets</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForCollateralExplanatory_9c66a50f-0697-4c40-b4d0-fb22a9c786a1_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForCollateralExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collateral paid and received</link:label>
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    <link:label id="lab_tac_DividendRateOnPreferenceSharesSpread_4a14ac81-41ea-457f-a8e6-e7c0c90650e6_terseLabel_en-US" xlink:label="lab_tac_DividendRateOnPreferenceSharesSpread" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividend rate on preference shares, term</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivables_2d75772b-c5fb-49da-a6c6-7156f80e01af_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables</link:label>
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    <link:label id="lab_tac_AmountPerShareRedeemableAtResetDate_1c5fd539-e0d7-4dea-87cc-b1769bde5610_terseLabel_en-US" xlink:label="lab_tac_AmountPerShareRedeemableAtResetDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount per share redeemable at reset date</link:label>
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    <link:label id="lab_tac_DisclosureOfSignificantEventsTextBlock_7f7eac69-f47f-494d-a14d-089584f9a3a0_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfSignificantEventsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Events</link:label>
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    <link:label id="lab_tac_AveragePowerPrices_667cbedb-55b7-4463-9409-57ec0796837f_terseLabel_en-US" xlink:label="lab_tac_AveragePowerPrices" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Average Power Prices</link:label>
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    <link:label id="lab_tac_AveragePowerPrices_documentation_en-US" xlink:label="lab_tac_AveragePowerPrices" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Average Power Prices</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAbstract_38286486-b0fc-48ed-8506-01d24dff8e43_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss) [abstract]</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAbstract_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss) [abstract]</link:label>
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    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember_2d1ae152-f498-4e05-9be3-61cc23cd030f_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Second to fifth years inclusive</link:label>
    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than two years and not later than five years [member]</link:label>
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    <link:label id="lab_tac_InvestmentAgreementMember_81261c0b-4657-415a-b0fc-54d33ee02639_terseLabel_en-US" xlink:label="lab_tac_InvestmentAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Agreement</link:label>
    <link:label id="lab_tac_InvestmentAgreementMember_label_en-US" xlink:label="lab_tac_InvestmentAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Agreement [Member]</link:label>
    <link:label id="lab_tac_InvestmentAgreementMember_documentation_en-US" xlink:label="lab_tac_InvestmentAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment Agreement</link:label>
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    <link:label id="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInOtherComprehensiveIncome_9e8ee447-a3fb-447f-95f0-1eadb8e9cd59_terseLabel_en-US" xlink:label="lab_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains recognized in other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_OtherOperatingIncomeExpense_54d230d1-3c65-4036-9bc8-baef4eddb15c_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_OtherOperatingIncomeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net other operating expense (income) (Note 9)</link:label>
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    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_6815ea9a-f296-4cf4-8279-ffcffe932b91_terseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of lease liabilities, classified as financing activities</link:label>
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    <link:label id="lab_tac_IncreaseDecreaseThroughDividendsDeclaredLiabilitiesArisingFromFinancingActivities_1339427f-9d67-4aa9-a954-9e2863fd4405_terseLabel_en-US" xlink:label="lab_tac_IncreaseDecreaseThroughDividendsDeclaredLiabilitiesArisingFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dividends declared</link:label>
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    <link:label id="lab_tac_NumberOfTurbinesAcquired_058994bf-9c37-4e7e-a16c-47719e9b7fd1_terseLabel_en-US" xlink:label="lab_tac_NumberOfTurbinesAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of turbines acquired</link:label>
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    <link:label id="lab_ifrs-full_TopOfRangeMember_4b45c650-bd5a-4ec5-be24-39da1cb67f3c_terseLabel_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_ifrs-full_TopOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Top of range [member]</link:label>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentSubjectToOperatingLeasesMember_53d1fc9c-94fc-4abe-91b5-2f0a4c547dfe_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentSubjectToOperatingLeasesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment subject to operating leases</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_0e1cb30c-a198-406d-bccf-63754e1ca835_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of analysis of other comprehensive income by item [line items]</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfShareCapitalMember_30ecb571-8230-46b1-ba91-08a033fb6e9a_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share capital [member]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfShareCapitalMember_label_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share capital [member]</link:label>
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    <link:label id="lab_tac_Increasedecreaseinfinancialliabilities_f9b34e22-c394-4ebe-a6aa-daca7b5cd1ee_terseLabel_en-US" xlink:label="lab_tac_Increasedecreaseinfinancialliabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in financial liabilities</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueArisingFromChangeInEstimateOfTransactionPriceContractLiabilities_98da6e23-2750-410b-839f-e2c0fd14f8de_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueArisingFromChangeInEstimateOfTransactionPriceContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRS 16 and 15 transition adjustments(1)</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill_332d5e79-1c3a-4d94-b3fe-b9b9dbab4166_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transfers</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through transfers, intangible assets other than goodwill</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanFiveYearsMember_bc58037d-afdb-434f-ad66-365e281db1b0_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">More than five years</link:label>
    <link:label id="lab_ifrs-full_LaterThanFiveYearsMember_70ad3354-c0a4-49a9-9acd-51e8752f41a9_verboseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2025</link:label>
    <link:label id="lab_ifrs-full_LaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than five years [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_LaterThanFiveYearsMember"/>
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    <link:label id="lab_tac_AmountWithheldUnderLitigationDisputeTax_ccfc4432-2f69-4e1b-8b88-238ef0b382b9_terseLabel_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDisputeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount withheld under dispute, tax</link:label>
    <link:label id="lab_tac_AmountWithheldUnderLitigationDisputeTax_label_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDisputeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount Withheld Under Litigation Dispute, Tax</link:label>
    <link:label id="lab_tac_AmountWithheldUnderLitigationDisputeTax_documentation_en-US" xlink:label="lab_tac_AmountWithheldUnderLitigationDisputeTax" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount Withheld Under Litigation Dispute, Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_AmountWithheldUnderLitigationDisputeTax" xlink:href="tac-20191231.xsd#tac_AmountWithheldUnderLitigationDisputeTax"/>
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    <link:label id="lab_ifrs-full_ValueAtRisk_60dec71f-0e41-40c9-b8b5-33a2d0dde7e7_terseLabel_en-US" xlink:label="lab_ifrs-full_ValueAtRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value at risk</link:label>
    <link:label id="lab_ifrs-full_ValueAtRisk_label_en-US" xlink:label="lab_ifrs-full_ValueAtRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value at risk</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ValueAtRisk" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ValueAtRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ValueAtRisk" xlink:to="lab_ifrs-full_ValueAtRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_BusinessinterruptionMember_77138fc0-b3b1-44e0-9d8b-f9ead31ee618_terseLabel_en-US" xlink:label="lab_tac_BusinessinterruptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business interruption [member]</link:label>
    <link:label id="lab_tac_BusinessinterruptionMember_label_en-US" xlink:label="lab_tac_BusinessinterruptionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business interruption [Member]</link:label>
    <link:label id="lab_tac_BusinessinterruptionMember_documentation_en-US" xlink:label="lab_tac_BusinessinterruptionMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business interruption [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_BusinessinterruptionMember" xlink:href="tac-20191231.xsd#tac_BusinessinterruptionMember"/>
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    <link:label id="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts_56ef17c2-dd19-4a37-a97d-975a72b2695a_terseLabel_en-US" xlink:label="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision for decommissioning, restoration and rehabilitation costs</link:label>
    <link:label id="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts_label_en-US" xlink:label="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Provision for decommissioning, restoration and rehabilitation costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:to="lab_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_WeightedAverageMember_219b786b-490c-4031-a910-1cdfbb955798_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average [member]</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageMember_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageMember" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_WeightedAverageMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_WeightedAverageMember" xlink:to="lab_ifrs-full_WeightedAverageMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_ifrs-full_MinimumOperatingLeasePayments_67e3b0a6-7e64-4d42-abe6-c320557621e6_terseLabel_en-US" xlink:label="lab_ifrs-full_MinimumOperatingLeasePayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum operating lease payments recognised as expense</link:label>
    <link:label id="lab_ifrs-full_MinimumOperatingLeasePayments_label_en-US" xlink:label="lab_ifrs-full_MinimumOperatingLeasePayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum operating lease payments recognised as expense</link:label>
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    <link:label id="lab_tac_DisclosureOfPrincipalRepaymentsTableTextBlock_5db969df-d899-4c6c-9242-7d1be1f9df3a_terseLabel_en-US" xlink:label="lab_tac_DisclosureOfPrincipalRepaymentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of principal repayments</link:label>
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    <link:label id="lab_ifrs-full_NetDefinedBenefitLiabilityAssetMember_2393e0e5-b0ad-4e5e-bfe3-1890c2f6f5a1_terseLabel_en-US" xlink:label="lab_ifrs-full_NetDefinedBenefitLiabilityAssetMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net defined benefit liability (asset) [member]</link:label>
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    <link:label id="lab_ifrs-full_LaterThanOneYearMember_9c138ea3-b340-45c7-8319-22dc0b1f7d48_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than one year</link:label>
    <link:label id="lab_ifrs-full_LaterThanOneYearMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than one year [member]</link:label>
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    <link:label id="lab_tac_LineOfCreditFacilityMaximumBorrowingCapacity1_50bd7289-a468-481d-95c3-33e99734bcee_terseLabel_en-US" xlink:label="lab_tac_LineOfCreditFacilityMaximumBorrowingCapacity1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum borrowing capacity under line of credit</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_LineOfCreditFacilityMaximumBorrowingCapacity1" xlink:href="tac-20191231.xsd#tac_LineOfCreditFacilityMaximumBorrowingCapacity1"/>
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    <link:label id="lab_ifrs-full_FinancialAssets_fb76733a-21ff-4db4-9f89-e958541cc5e7_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets</link:label>
    <link:label id="lab_ifrs-full_FinancialAssets_label_en-US" xlink:label="lab_ifrs-full_FinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_FinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialAssets" xlink:to="lab_ifrs-full_FinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NoncurrentPrepaymentsforEnergyBillCommittments_6fa43647-1406-4d09-ab12-0bda23aca3c5_terseLabel_en-US" xlink:label="lab_tac_NoncurrentPrepaymentsforEnergyBillCommittments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Funded portion of Energy Bill commitment</link:label>
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    <link:label id="lab_tac_NoncurrentPrepaymentsforEnergyBillCommittments_documentation_en-US" xlink:label="lab_tac_NoncurrentPrepaymentsforEnergyBillCommittments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Noncurrent Prepayments for Energy Bill Commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NoncurrentPrepaymentsforEnergyBillCommittments" xlink:href="tac-20191231.xsd#tac_NoncurrentPrepaymentsforEnergyBillCommittments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_NoncurrentPrepaymentsforEnergyBillCommittments" xlink:to="lab_tac_NoncurrentPrepaymentsforEnergyBillCommittments" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_PowerSaleContractsMember_b600f943-ee2f-4108-893f-794cce7a4206_terseLabel_en-US" xlink:label="lab_tac_PowerSaleContractsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power sale contracts</link:label>
    <link:label id="lab_tac_PowerSaleContractsMember_label_en-US" xlink:label="lab_tac_PowerSaleContractsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power Sale Contracts [Member]</link:label>
    <link:label id="lab_tac_PowerSaleContractsMember_documentation_en-US" xlink:label="lab_tac_PowerSaleContractsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Power Sale Contracts [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_PowerSaleContractsMember" xlink:href="tac-20191231.xsd#tac_PowerSaleContractsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_PowerSaleContractsMember" xlink:to="lab_tac_PowerSaleContractsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_tac_NaturalForcesTechnologiesInc.Member_a2c9569e-be34-4727-b741-fe23240c100a_terseLabel_en-US" xlink:label="lab_tac_NaturalForcesTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural Forces Technologies Inc.</link:label>
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    <link:label id="lab_tac_NaturalForcesTechnologiesInc.Member_documentation_en-US" xlink:label="lab_tac_NaturalForcesTechnologiesInc.Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Natural Forces Technologies Inc. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_NaturalForcesTechnologiesInc.Member" xlink:href="tac-20191231.xsd#tac_NaturalForcesTechnologiesInc.Member"/>
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    <link:label id="lab_tac_FacilitiesMember_fb68b67b-881d-469d-8c3b-d745d9bd0ebd_terseLabel_en-US" xlink:label="lab_tac_FacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Facilities</link:label>
    <link:label id="lab_tac_FacilitiesMember_label_en-US" xlink:label="lab_tac_FacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Facilities [Member]</link:label>
    <link:label id="lab_tac_FacilitiesMember_documentation_en-US" xlink:label="lab_tac_FacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Facilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_FacilitiesMember" xlink:href="tac-20191231.xsd#tac_FacilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_tac_FacilitiesMember" xlink:to="lab_tac_FacilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipment_3392cf63-4f0b-4202-a962-4675bb88ea62_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revisions and additions to decommissioning and restoration costs</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForDeferredTaxExpense_ec1f7ae7-24f2-4f61-920d-bc33d421ce67_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDeferredTaxExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred income tax expense (recovery) (Note 11)</link:label>
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    <link:label id="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates_52fd6daf-fc06-40f4-9eef-c657cc0ce3bc_terseLabel_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Health-care cost escalation(1)(3)</link:label>
    <link:label id="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates_label_en-US" xlink:label="lab_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Actuarial assumption of medical cost trend rates</link:label>
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    <link:label id="lab_dei_EntityDomain_214f18a5-89a4-4cac-9d7a-7067f080fdf9_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfRisksAxis_41dac6f0-c470-4b3e-b561-6f23c14bccd7_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfRisksAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of risks [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfRisksAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfRisksAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of risks [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis" xlink:href="http://xbrl.ifrs.org/taxonomy/2018-03-16/full_ifrs/full_ifrs-cor_2018-03-16.xsd#ifrs-full_TypesOfRisksAxis"/>
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    <link:label id="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_bb5acac5-545f-41b1-a177-62c29b2631b9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
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    <link:label id="lab_tac_IntercompanyOtherComprehensiveIncomeInvestmentsFairValue_34f10a92-ea4c-4a1a-8939-68209b69641a_terseLabel_en-US" xlink:label="lab_tac_IntercompanyOtherComprehensiveIncomeInvestmentsFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intercompany FVOCI investments</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_e034bf81-98e6-400c-90f2-b474b284b9f2_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for increase (decrease) in employee benefit liabilities</link:label>
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    <link:label id="lab_tac_AARatingMember_7c9ba536-1661-4c3b-920f-c3178cc30c35_terseLabel_en-US" xlink:label="lab_tac_AARatingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">AA</link:label>
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    <link:label id="lab_tac_IncomeTaxExpenseRecoveryRelatingToGainsOnDerivativesDesignatedAsCashFlowHedgesOfOtherComprehensiveIncome_62613a0c-a5d5-471a-a20c-cd5a37833800_terseLabel_en-US" xlink:label="lab_tac_IncomeTaxExpenseRecoveryRelatingToGainsOnDerivativesDesignatedAsCashFlowHedgesOfOtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense (recovery) relating to gains on derivatives designated as cash flow hedges of other comprehensive income</link:label>
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    <link:label id="lab_ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_9ac04b5f-69be-45ac-9d13-3b83df936574_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease commitments for short-term leases for which recognition exemption has been used</link:label>
    <link:label id="lab_ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed_label_en-US" xlink:label="lab_ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease commitments for short-term leases for which recognition exemption has been used</link:label>
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    <link:label id="lab_tac_LakeswindMember_651d2b86-ffda-4bcd-9ae8-75be675fb0eb_terseLabel_en-US" xlink:label="lab_tac_LakeswindMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind</link:label>
    <link:label id="lab_tac_LakeswindMember_label_en-US" xlink:label="lab_tac_LakeswindMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind [Member]</link:label>
    <link:label id="lab_tac_LakeswindMember_documentation_en-US" xlink:label="lab_tac_LakeswindMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lakeswind [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_LakeswindMember" xlink:href="tac-20191231.xsd#tac_LakeswindMember"/>
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    <link:label id="lab_tac_NetInvestmentHedgeMember_76eaab61-fa0f-4045-adab-82fc8b61c9be_terseLabel_en-US" xlink:label="lab_tac_NetInvestmentHedgeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Investment Hedge</link:label>
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    <link:label id="lab_tac_NetInvestmentHedgeMember_documentation_en-US" xlink:label="lab_tac_NetInvestmentHedgeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Investment Hedge [Member]</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfContingentLiabilitiesAxis_cec1acef-0e46-42d0-9dbf-4e653f4ed872_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfContingentLiabilitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of contingent liabilities [axis]</link:label>
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    <link:label id="lab_ifrs-full_CurrentContractLiabilities_1835f479-47c2-4c5c-a86a-5f5c414db2e9_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current contract liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentContractLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current contract liabilities</link:label>
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    <link:label id="lab_tac_PurchaseObligationItemAxis_f0b4a652-2e47-44b4-87c9-27ac35bcfb53_terseLabel_en-US" xlink:label="lab_tac_PurchaseObligationItemAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligation Item [axis]</link:label>
    <link:label id="lab_tac_PurchaseObligationItemAxis_label_en-US" xlink:label="lab_tac_PurchaseObligationItemAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligation Item [Axis]</link:label>
    <link:label id="lab_tac_PurchaseObligationItemAxis_documentation_en-US" xlink:label="lab_tac_PurchaseObligationItemAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase Obligation Item</link:label>
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    <link:label id="lab_tac_CommittedCreditFacilitiesMember_117ce974-b195-4d83-a189-75ab3944de03_terseLabel_en-US" xlink:label="lab_tac_CommittedCreditFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed credit facilities</link:label>
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    <link:label id="lab_tac_CommittedCreditFacilitiesMember_documentation_en-US" xlink:label="lab_tac_CommittedCreditFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Committed Credit Facilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_tac_CommittedCreditFacilitiesMember" xlink:href="tac-20191231.xsd#tac_CommittedCreditFacilitiesMember"/>
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    <link:label id="lab_ifrs-full_UnusedProvisionReversedOtherProvisions_c4a88a3c-e3a6-4e53-afdd-adb47c9c058f_terseLabel_en-US" xlink:label="lab_ifrs-full_UnusedProvisionReversedOtherProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of unused provision</link:label>
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    <link:label id="lab_tac_DiscontinuedCashFlowHedgePositionMember_a2b9ba40-a43c-48b2-abdd-337b8d8ccfa4_terseLabel_en-US" xlink:label="lab_tac_DiscontinuedCashFlowHedgePositionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discontinued Cash Flow Hedge Position</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_tac_DiscontinuedCashFlowHedgePositionMember" xlink:href="tac-20191231.xsd#tac_DiscontinuedCashFlowHedgePositionMember"/>
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