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        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="por_FairValueOfFinancialInstrumentsAbstract" abstract="true" name="FairValueOfFinancialInstrumentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_DeferredIncomeTaxExpenseFootnote" abstract="false" name="DeferredIncomeTaxExpenseFootnote" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_IncreaseDecreaseInCashFlowFromDeferralOfIncrementalWildfireCosts" abstract="false" name="IncreaseDecreaseInCashFlowFromDeferralOfIncrementalWildfireCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_TrojandecommissioningMember" abstract="true" name="TrojandecommissioningMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_AmountsIncludedInComprehensiveIncomeAbstract" abstract="true" name="AmountsIncludedInComprehensiveIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CommitmentsAndGuaranteesAbstract" abstract="true" name="CommitmentsAndGuaranteesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CommitmentCosts" abstract="false" name="CommitmentCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet" abstract="false" name="PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RevolvingCreditFacilitiesTextBlock" abstract="false" name="RevolvingCreditFacilitiesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_LiabilitiesFromPriceRiskManagementActivitiesAbstract" abstract="true" name="LiabilitiesFromPriceRiskManagementActivitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_EarningareturnMember" abstract="true" name="EarningareturnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_February2021IceStormAndDamageDeferralMember" abstract="true" name="February2021IceStormAndDamageDeferralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_SummaryOfSignificantAccountingPoliciesAbstract" abstract="true" name="SummaryOfSignificantAccountingPoliciesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CommodityContractAssetElectricity" abstract="false" name="CommodityContractAssetElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_FairValueOfFinancialInstrumentsNoteAbstract" abstract="true" name="FairValueOfFinancialInstrumentsNoteAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_IncomeTaxesNoteAbstract" abstract="true" name="IncomeTaxesNoteAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CurrentLiabilitiesCommodityContractsAbstract" abstract="true" name="CurrentLiabilitiesCommodityContractsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_OtherCurrentLiabilitiesOther" abstract="false" name="OtherCurrentLiabilitiesOther" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_ServiceAreaSqMiles" abstract="false" name="ServiceAreaSqMiles" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <xs:element id="por_TransfersInAndOutOfLevel3PolicyTextBlock" abstract="false" name="TransfersInAndOutOfLevel3PolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_A2020LaborDayWildfireEarningsTestReserve" abstract="false" name="A2020LaborDayWildfireEarningsTestReserve" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NumberOfNamesOfOtherPotentiallyResponsibleParties" abstract="false" name="NumberOfNamesOfOtherPotentiallyResponsibleParties" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanSharePurchaseLimitation" abstract="false" name="EmployeeStockPurchasePlanSharePurchaseLimitation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_DeferredTaxAssetsTaxCreditsNetOfValuationAllowance" abstract="false" name="DeferredTaxAssetsTaxCreditsNetOfValuationAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DepreciationExpenseRate" abstract="false" name="DepreciationExpenseRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_NoncurrentDerivativeLiabilities" abstract="false" name="NoncurrentDerivativeLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CorporateDebtSecuritiesHeldInDecommissioningTrustAssets" abstract="false" name="CorporateDebtSecuritiesHeldInDecommissioningTrustAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractAssetNoncurrentElectricity" abstract="false" name="CommodityContractAssetNoncurrentElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CompanyContributionPercentageTo401KForPost2008Hires" abstract="false" name="CompanyContributionPercentageTo401KForPost2008Hires" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency" abstract="false" name="VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting" abstract="false" name="StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_DomesticEquitySecurities" abstract="false" name="DomesticEquitySecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_FnancialSwapsElectricity" abstract="false" name="FnancialSwapsElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DefinedBenefitPlanEffectOfDecreaseOfRateOfReturnOnPlanAssetsOnServiceAndInterestCostComponents" abstract="false" name="DefinedBenefitPlanEffectOfDecreaseOfRateOfReturnOnPlanAssetsOnServiceAndInterestCostComponents" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_WildfireMitigationMember" abstract="true" name="WildfireMitigationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_UpperRangeOfCosts" abstract="false" name="UpperRangeOfCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NonQualifiedBenefitPlansMember" abstract="true" name="NonQualifiedBenefitPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_NetActuarialLossGainIncludedInComprehensiveIncome" abstract="false" name="NetActuarialLossGainIncludedInComprehensiveIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_TrustAxis" abstract="true" name="TrustAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="por_FranchiseTaxPolicyTextBlock" abstract="false" name="FranchiseTaxPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_JointlyOwnedPlantTextBlock" abstract="false" name="JointlyOwnedPlantTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_CurrentDerivativeAssets" abstract="false" name="CurrentDerivativeAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_StockBasedCompensationForfeitureRate" abstract="false" name="StockBasedCompensationForfeitureRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_CommodityContractLiabilityNoncurrentElectricity" abstract="false" name="CommodityContractLiabilityNoncurrentElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas" abstract="false" name="RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractLiabilitiesElectricity" abstract="false" name="CommodityContractLiabilitiesElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NumberOfUnionEmployees" abstract="false" name="NumberOfUnionEmployees" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_AccruedExpensesAndOtherCurrentLiabilitiesAbstract" abstract="true" name="AccruedExpensesAndOtherCurrentLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_DividendReinvestmentAndDirectStockPurchasePlanShares" abstract="false" name="DividendReinvestmentAndDirectStockPurchasePlanShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_DebtInstrumentCovenantRatio" abstract="false" name="DebtInstrumentCovenantRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_CommitmentsAndGuaranteesTextBlock" abstract="false" name="CommitmentsAndGuaranteesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanBasePayThreshold" abstract="false" name="EmployeeStockPurchasePlanBasePayThreshold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_FirstMortgageBondsMinimumRate" abstract="false" name="FirstMortgageBondsMinimumRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_IncomeTaxesAbstract" abstract="true" name="IncomeTaxesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_PgeShareOfOutput" abstract="false" name="PgeShareOfOutput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_CurrentAssetsCommodityContractsAbstract" abstract="true" name="CurrentAssetsCommodityContractsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_PollutionControlRevenueBondsAt2375" abstract="false" name="PollutionControlRevenueBondsAt2375" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NetActuarialLoss" abstract="false" name="NetActuarialLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_AssetsAndLiabilitesAssociatedWithNonQualifiedBenefitPlansTable" abstract="true" name="AssetsAndLiabilitesAssociatedWithNonQualifiedBenefitPlansTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="por_Estimatedaverageservicelifewindproductionplant" abstract="false" name="Estimatedaverageservicelifewindproductionplant" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="por_ProductionExcludingThermalAbstract" abstract="true" name="ProductionExcludingThermalAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_DecouplingMechanismDeferralsNet" abstract="false" name="DecouplingMechanismDeferralsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency" abstract="false" name="RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_ElectricityPhysicalForwardPurchase" abstract="false" name="ElectricityPhysicalForwardPurchase" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractsAbstract" abstract="true" name="CommodityContractsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_NoncurrentLiabilitiesCommodityContractsAbstract" abstract="true" name="NoncurrentLiabilitiesCommodityContractsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_OtherPostretirementBenefitPlansAssetsAbstract" abstract="true" name="OtherPostretirementBenefitPlansAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity" abstract="false" name="VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:energyItemType"/>
  <xs:element id="por_GrossReportingOfPositiveAndNegativeExposuresRelatedToDerivativeInstrumentsPolicyTextBlock" abstract="false" name="GrossReportingOfPositiveAndNegativeExposuresRelatedToDerivativeInstrumentsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_TotalAmountsIncludedInComprehensiveIncome" abstract="false" name="TotalAmountsIncludedInComprehensiveIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CurrentDerivativeLiabilities" abstract="false" name="CurrentDerivativeLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_Performancebasedstockawardpercentageminimum" abstract="false" name="Performancebasedstockawardpercentageminimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_RegulatoryAssetsEarningRateOfReturnAtApprovedRate" abstract="false" name="RegulatoryAssetsEarningRateOfReturnAtApprovedRate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NumberOfUnionEmployeesSubjectToAgreementB" abstract="false" name="NumberOfUnionEmployeesSubjectToAgreementB" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_Estimatedaverageservicelifehydroproductionplant" abstract="false" name="Estimatedaverageservicelifehydroproductionplant" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="por_ShortTermDebtMaximumAmountOutstandingDuringYear" abstract="false" name="ShortTermDebtMaximumAmountOutstandingDuringYear" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_AllocationOfFinancialAssetToHierarchyLevelsPolicyTextBlock" abstract="false" name="AllocationOfFinancialAssetToHierarchyLevelsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_RemainingAmountsOfRegulatoryLiabilitesForWhichNoInterstAccruesDuringRecoveryPeriodIsProvided" abstract="false" name="RemainingAmountsOfRegulatoryLiabilitesForWhichNoInterstAccruesDuringRecoveryPeriodIsProvided" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NetRealizedLosses" abstract="false" name="NetRealizedLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_LowerRangeOfCosts" abstract="false" name="LowerRangeOfCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DerivativeLiabilitiesTotal" abstract="false" name="DerivativeLiabilitiesTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_AssetRetirementObligationNonUtilityProperty" abstract="false" name="AssetRetirementObligationNonUtilityProperty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_ServiceAreaPopulation" abstract="false" name="ServiceAreaPopulation" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_StockPurchasePlanTextBlock" abstract="false" name="StockPurchasePlanTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_Letterofcreditfacility" abstract="false" name="Letterofcreditfacility" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_TaxCreditCarryforwardFederal" abstract="false" name="TaxCreditCarryforwardFederal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractLiabilityCurrentElectricity" abstract="false" name="CommodityContractLiabilityCurrentElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_UnrealizedGainLossOnDerivativesMember" abstract="true" name="UnrealizedGainLossOnDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_JointlyOwnedPlantAbstract" abstract="true" name="JointlyOwnedPlantAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_NoncurrentAssetsCommodityContractsAbstract" abstract="true" name="NoncurrentAssetsCommodityContractsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_PublicUtilitiesPropertyPlantAndEquipmentIntangible" abstract="false" name="PublicUtilitiesPropertyPlantAndEquipmentIntangible" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_Otherpostretirementdefinedbenefitplanliabilitycurrent" abstract="false" name="Otherpostretirementdefinedbenefitplanliabilitycurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_TrustDomain" abstract="true" name="TrustDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_WellsMember" abstract="true" name="WellsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_PublicUtilitiesPropertyPlantAndEquipmentGeneral" abstract="false" name="PublicUtilitiesPropertyPlantAndEquipmentGeneral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanPurchasePrice" abstract="false" name="EmployeeStockPurchasePlanPurchasePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_DerivativeAssetsTotal" abstract="false" name="DerivativeAssetsTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_PriceRiskManagementAbstract" abstract="true" name="PriceRiskManagementAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_BalanceSheetComponentsAbstract" abstract="true" name="BalanceSheetComponentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CommodityContractAssetCurrentNaturalGas" abstract="false" name="CommodityContractAssetCurrentNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_FercAuthorizedShortTermDebtEffectiveThroughFebruary62014" abstract="false" name="FercAuthorizedShortTermDebtEffectiveThroughFebruary62014" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RealizedAndUnrealizedGainsAndLossesNetCommodityContract" abstract="false" name="RealizedAndUnrealizedGainsAndLossesNetCommodityContract" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_IncorporatedCities" abstract="false" name="IncorporatedCities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3" abstract="false" name="NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DepreciationLivesPolicyTextBlock" abstract="false" name="DepreciationLivesPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_DefinedBenefitPlanBenefitObligationChangesBetweenActualAndExpectedReturnOnPlanAssetsGains" abstract="false" name="DefinedBenefitPlanBenefitObligationChangesBetweenActualAndExpectedReturnOnPlanAssetsGains" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractLiabilityNoncurrentNaturalGas" abstract="false" name="CommodityContractLiabilityNoncurrentNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DebtSecuritiesDomesticGovernment" abstract="false" name="DebtSecuritiesDomesticGovernment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_IndustrialMember" abstract="true" name="IndustrialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_OperatingLeaseLiabilityRelatedToPowerPurchaseAgreements" abstract="false" name="OperatingLeaseLiabilityRelatedToPowerPurchaseAgreements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractAssetNoncurrentNaturalGas" abstract="false" name="CommodityContractAssetNoncurrentNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NaturalGasFinancialSwaps" abstract="false" name="NaturalGasFinancialSwaps" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommercialMember" abstract="true" name="CommercialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_A2020LaborDayWildfireDeferralMember" abstract="true" name="A2020LaborDayWildfireDeferralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_ContingenciesAbstract" abstract="true" name="ContingenciesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_ScheduleOfAllocationOfPlanAssetsTable" abstract="true" name="ScheduleOfAllocationOfPlanAssetsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanSharesAuthorized" abstract="false" name="EmployeeStockPurchasePlanSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_AssetRetirementObligationUtilityPlant" abstract="false" name="AssetRetirementObligationUtilityPlant" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas" abstract="false" name="VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:energyItemType"/>
  <xs:element id="por_CommercialPaperMaximumTerm" abstract="false" name="CommercialPaperMaximumTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="por_PollutionControlRevenueBondsAt2125" abstract="false" name="PollutionControlRevenueBondsAt2125" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_PowerCostDeadbandUpperThreshold" abstract="false" name="PowerCostDeadbandUpperThreshold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting" abstract="false" name="NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanNumberOfAvailableShares" abstract="false" name="EmployeeStockPurchasePlanNumberOfAvailableShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_OtherRegulatoryAssetsEarningaReturnMember" abstract="true" name="OtherRegulatoryAssetsEarningaReturnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_EmployeeBenefitsAbstract" abstract="true" name="EmployeeBenefitsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CompanyMatchPost2008Hire" abstract="false" name="CompanyMatchPost2008Hire" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting" abstract="false" name="Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_EstimatedAverageServiceLivesTableTextBlock" abstract="false" name="EstimatedAverageServiceLivesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_PeltonRoundButteMemberMember" abstract="true" name="PeltonRoundButteMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_CompanyContributionPercentTo401KForBargainingEmployees" abstract="false" name="CompanyContributionPercentTo401KForBargainingEmployees" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_PgePortionOfCapacity" abstract="false" name="PgePortionOfCapacity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="por_BasisOfPresentationAbstract" abstract="true" name="BasisOfPresentationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_PowerCostDeadbandLowerThreshold" abstract="false" name="PowerCostDeadbandLowerThreshold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_OtherCurrentAssetsAbstract" abstract="true" name="OtherCurrentAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_FirstMortgageBondsMaximumRate" abstract="false" name="FirstMortgageBondsMaximumRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_ColstripMember" abstract="true" name="ColstripMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_RevenueBondsIssuedByPublicUtilityDistricts" abstract="false" name="RevenueBondsIssuedByPublicUtilityDistricts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RegulatoryAssetsFromPriceRiskManagementActivities" abstract="false" name="RegulatoryAssetsFromPriceRiskManagementActivities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DirectAccesscustomersMember" abstract="true" name="DirectAccesscustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_EPAInvestigationOfPortlandHarborMember" abstract="true" name="EPAInvestigationOfPortlandHarborMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_COVID19DeferralMember" abstract="true" name="COVID19DeferralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_InterestAndPenaltiesRelatedToIncomeTaxesPolicyTextBlock" abstract="false" name="InterestAndPenaltiesRelatedToIncomeTaxesPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_LointlyOwnedPlantAbstract" abstract="true" name="LointlyOwnedPlantAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity" abstract="false" name="RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_DetailsOfCertainBalanceSheetAccountsDisclosureTextBlock" abstract="false" name="DetailsOfCertainBalanceSheetAccountsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_FairValueMoneyMarketFunds" abstract="false" name="FairValueMoneyMarketFunds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractAssetNaturalGas" abstract="false" name="CommodityContractAssetNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_RegulatoryAssetsAndLiabilitiesAbstract" abstract="true" name="RegulatoryAssetsAndLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_ResidentialMember" abstract="true" name="ResidentialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_CommodityContractLiabilitiesNaturalGas" abstract="false" name="CommodityContractLiabilitiesNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CollateralAggregateFairValue" abstract="false" name="CollateralAggregateFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_NumberOfUnionEmployeesSubjectToAgreementA" abstract="false" name="NumberOfUnionEmployeesSubjectToAgreementA" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_AssetsAndLiabilitiesAssociatedWithNonQualifiedBenefitPlansTableTextBlock" abstract="false" name="AssetsAndLiabilitiesAssociatedWithNonQualifiedBenefitPlansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_CommodityAxis" abstract="true" name="CommodityAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="por_DividendReinvestmentAndDirectStockPurchasePlanNumberOfAvailableShares" abstract="false" name="DividendReinvestmentAndDirectStockPurchasePlanNumberOfAvailableShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="por_DeferredAbstract" abstract="true" name="DeferredAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_BalanceSheetCompnentsAbstract" abstract="true" name="BalanceSheetCompnentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_Performancebasedstockawardpercentagemaximum" abstract="false" name="Performancebasedstockawardpercentagemaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_CommodityContractLiabilityCurrentNaturalGas" abstract="false" name="CommodityContractLiabilityCurrentNaturalGas" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_IncreaseDecreaseInCashFlowsFromDeferralOfWildfireMitigationCosts" abstract="false" name="IncreaseDecreaseInCashFlowsFromDeferralOfWildfireMitigationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_PensionAndOtherPostretirementBenefitsValuationMethodologyPolicyTextBlock" abstract="false" name="PensionAndOtherPostretirementBenefitsValuationMethodologyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_PublicUtilityDistrictsMember" abstract="true" name="PublicUtilityDistrictsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_EquityBasedPlansAbstract" abstract="true" name="EquityBasedPlansAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_TrojanDecommissioningActivities" abstract="false" name="TrojanDecommissioningActivities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_PowerCostPolicyTextBlock" abstract="false" name="PowerCostPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_NumberOfRetailCustomers" abstract="false" name="NumberOfRetailCustomers" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="por_TotalCommodityContracts" abstract="false" name="TotalCommodityContracts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_EquitySecuritiesAbstract" abstract="true" name="EquitySecuritiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_CommodityDomain" abstract="true" name="CommodityDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_NonQualifiedBenefitPolicyTextBlock" abstract="false" name="NonQualifiedBenefitPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="por_CompanyMatchPre2009Hire" abstract="false" name="CompanyMatchPre2009Hire" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="por_PowerCostAdjustmentMechanismDeferralMember" abstract="true" name="PowerCostAdjustmentMechanismDeferralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="por_EmployeeStockPurchasePlanPurchasedStockValueLimitation" abstract="false" name="EmployeeStockPurchasePlanPurchasedStockValueLimitation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_CommodityContractAssetCurrentElectricity" abstract="false" name="CommodityContractAssetCurrentElectricity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="por_LongTermDebtDisclosureAbstract" abstract="true" name="LongTermDebtDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="por_PriestRapidsAndWanapumMember" abstract="true" name="PriestRapidsAndWanapumMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
