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  <xs:element id="pnm_RegulatoryAndRateMattersTextBlock" abstract="false" name="RegulatoryAndRateMattersTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="pnm_PublicUtilitiesAllowedReturnOnEquityAdditional" abstract="false" name="PublicUtilitiesAllowedReturnOnEquityAdditional" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="pnm_IncreaseDecreaseInOtherThanTemporaryLossesInvestmentsPortionRecognizedInEarningsNetAvailableForSaleSecurities" abstract="false" name="IncreaseDecreaseInOtherThanTemporaryLossesInvestmentsPortionRecognizedInEarningsNetAvailableForSaleSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_PublicUtilitiesNumberOfMegawattsAvailableInPurchasePowerAgreement" abstract="false" name="PublicUtilitiesNumberOfMegawattsAvailableInPurchasePowerAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="pnm_PublicUtilitiesAnnualFundingPostTermReclamationTrustYearOne" abstract="false" name="PublicUtilitiesAnnualFundingPostTermReclamationTrustYearOne" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_BatteryStorageAgreementMember" abstract="true" name="BatteryStorageAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_A2020EnergyEfficiencyAnnualReportMember" abstract="true" name="A2020EnergyEfficiencyAnnualReportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_PublicUtilitiesBatteryEnergyStorageSystemCosts" abstract="false" name="PublicUtilitiesBatteryEnergyStorageSystemCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_PublicUtilitiesNumberOfLeasesUnderWhichLeaseTermWasExtended" abstract="false" name="PublicUtilitiesNumberOfLeasesUnderWhichLeaseTermWasExtended" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="pnm_PNM2023SUNsAtFivePointFiveOnePercentDueApril282035Member" abstract="true" name="PNM2023SUNsAtFivePointFiveOnePercentDueApril282035Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_NumberOfPurchasePowerAgreementsNonDerivatives" abstract="false" name="NumberOfPurchasePowerAgreementsNonDerivatives" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="pnm_RetailElectricIndustrialCustomersMember" abstract="true" name="RetailElectricIndustrialCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_PublicUtilitiesAnnualFundingPostTermReclamationTrustYearTwo" abstract="false" name="PublicUtilitiesAnnualFundingPostTermReclamationTrustYearTwo" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="pnm_DeferredRegulatoryAssetIncreaseDecreaseDuringThePeriod" abstract="false" name="DeferredRegulatoryAssetIncreaseDecreaseDuringThePeriod" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_PublicUtilitiesSolarGenerationCapacityInMegawatts" abstract="false" name="PublicUtilitiesSolarGenerationCapacityInMegawatts" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
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  <xs:element id="pnm_PaymentsForReliefFromObligations" abstract="false" name="PaymentsForReliefFromObligations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesAuthorized" abstract="false" name="CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="pnm_CashUsedToSupportBankLetterOrCreditArrangement" abstract="false" name="CashUsedToSupportBankLetterOrCreditArrangement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_TexasNewMexicoPowerCompanyMember" abstract="true" name="TexasNewMexicoPowerCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesOutstanding" abstract="false" name="CumulativePreferredStockOfSubsidiaryWithoutMandatoryRedemptionRequirementsSharesOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="pnm_NumberOfMegaWattsPurchased" abstract="false" name="NumberOfMegaWattsPurchased" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="pnm_TNMP2022BondPurchaseAgreementMember" abstract="true" name="TNMP2022BondPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_ReclamationTrustFundingRemainderOfYear" abstract="false" name="ReclamationTrustFundingRemainderOfYear" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="pnm_RedMesaWindMember" abstract="true" name="RedMesaWindMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_NMRDMember" abstract="true" name="NMRDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_AtTheMarketMember" abstract="true" name="AtTheMarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_SJGSDecommissioningTrustMember" abstract="true" name="SJGSDecommissioningTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_TNMP2023BondPurchaseAgreementAtFivePointFortySevenPercentDueJuly282053Member" abstract="true" name="TNMP2023BondPurchaseAgreementAtFivePointFortySevenPercentDueJuly282053Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_LesseeOperatingLeaseLeaseNotYetCommencedFixedConsideration" abstract="false" name="LesseeOperatingLeaseLeaseNotYetCommencedFixedConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_VariableInterestEntityStatementOfFinancialPositionAbstract" abstract="true" name="VariableInterestEntityStatementOfFinancialPositionAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="pnm_PNMtoPNMRMember" abstract="true" name="PNMtoPNMRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_FirstMortgageBondsDue2019Series2009Aat9point50percentMember" abstract="true" name="FirstMortgageBondsDue2019Series2009Aat9point50percentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_PublicUtilitiesNumberofMegaWattsofWindEnergyCapacity" abstract="false" name="PublicUtilitiesNumberofMegaWattsofWindEnergyCapacity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="pnm_MiscellaneousRevenueFromContractsWithCustomersMember" abstract="true" name="MiscellaneousRevenueFromContractsWithCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_PublicUtilitiesMaximumAmountunderNuclearElectricInsuranceLimited" abstract="false" name="PublicUtilitiesMaximumAmountunderNuclearElectricInsuranceLimited" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_PublicUtilitiesAnnualRateCredits" abstract="false" name="PublicUtilitiesAnnualRateCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_UndergroundMember" abstract="true" name="UndergroundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_PublicUtilitiesExcessReturnOnJurisdictionalEquityThatWouldRequireRefund" abstract="false" name="PublicUtilitiesExcessReturnOnJurisdictionalEquityThatWouldRequireRefund" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
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  <xs:element id="pnm_PublicUtilitiesConcentrationRiskPotentialMarketRisk" abstract="false" name="PublicUtilitiesConcentrationRiskPotentialMarketRisk" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="pnm_RequiredPercentageby2030Member" abstract="true" name="RequiredPercentageby2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_NumberOfBatteryStorageSystems" abstract="false" name="NumberOfBatteryStorageSystems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="pnm_NuclearSpentFuelAndWasteDisposalMember" abstract="true" name="NuclearSpentFuelAndWasteDisposalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" abstract="true" name="RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="pnm_RetailElectricCommercialCustomersMember" abstract="true" name="RetailElectricCommercialCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_RequiredPercentageby2045Member" abstract="true" name="RequiredPercentageby2045Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_PublicUtilitiesCommitmentsAndContingenciesLineItems" abstract="true" name="PublicUtilitiesCommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="pnm_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pnm_PnmrAndPnmMember" abstract="true" name="PnmrAndPnmMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="pnm_RenewablePortfolioStandardMember" abstract="true" name="RenewablePortfolioStandardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_JointlyOwnedGeneratingFacilitiesAxis" abstract="true" name="JointlyOwnedGeneratingFacilitiesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="pnm_InterconnectionBillingsMember" abstract="true" name="InterconnectionBillingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesInYearTwo" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesInYearTwo" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="pnm_PublicUtilitiesGridModernizationInvestment" abstract="false" name="PublicUtilitiesGridModernizationInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="pnm_SanJuanGenerationStationUnit1Member" abstract="true" name="SanJuanGenerationStationUnit1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pnm_OtherDeferredCostsNetIncludingDeferredFinanceCosts" abstract="false" name="OtherDeferredCostsNetIncludingDeferredFinanceCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="pnm_DebtInstrumentSeriesOfBondIssuance" abstract="false" name="DebtInstrumentSeriesOfBondIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="pnm_NM2022RateCaseMember" abstract="true" name="NM2022RateCaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
