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  <xsd:element id="cpn_FirstPriorityLiensUnderPowerAndNaturalGasAgreements" name="FirstPriorityLiensUnderPowerAndNaturalGasAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_GeothermalPropertiesGross" name="GeothermalPropertiesGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_GeothermalPropertiesGrossMember" name="GeothermalPropertiesGrossMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_GrantsInOptionGrantsWithThreeYearCliffVesting" name="GrantsInOptionGrantsWithThreeYearCliffVesting" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_GreenfieldMember" name="GreenfieldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_GuadalupeEnergyCenterMember" name="GuadalupeEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_GuadalupeExpansionCapacityMember" name="GuadalupeExpansionCapacityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_HogBayouEnergyCenterMember" name="HogBayouEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_IncomeLossFromUnconsolidatedInvestmentsInPowerPlantsAndDistributionsTableTextBlock" name="IncomeLossFromUnconsolidatedInvestmentsInPowerPlantsAndDistributionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_IncrementalCCFCTermLoansMember" name="IncrementalCCFCTermLoansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_InlandEmpireEnergyCenterMember" name="InlandEmpireEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_InterestPeriodsAxis" name="InterestPeriodsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_InterestPeriodsDomain" name="InterestPeriodsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_InterestRateDerivativeLiabilitiesFairValueOnSettlementDateAbstract" name="InterestRateDerivativeLiabilitiesFairValueOnSettlementDateAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_InterestRateSwapAssetsFairValueDisclosure" name="InterestRateSwapAssetsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_InterestRateSwapLiabilitiesFairValueDisclosure" name="InterestRateSwapLiabilitiesFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cpn_Interestrateswapsincludedininterestexpense" name="Interestrateswapsincludedininterestexpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_Intersegmentrevenue" name="Intersegmentrevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_LeaseLevelization" name="LeaseLevelization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cpn_LettersOfCreditIssued" name="LettersOfCreditIssued" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_LettersOfCreditIssuedAndFirstPriorityLiensUnderPowerNaturalGasAndInterestRateSwapAgreements" name="LettersOfCreditIssuedAndFirstPriorityLiensUnderPowerNaturalGasAndInterestRateSwapAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_LettersOfCreditPostedByCounterparties" name="LettersOfCreditPostedByCounterparties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cpn_LongTermDebtnetofOriginalIssuanceDisount" name="LongTermDebtnetofOriginalIssuanceDisount" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_MarginAndPrepaymentAmountsIncludedInMarginDepositsAndOtherPrepaidExpenses" name="MarginAndPrepaymentAmountsIncludedInMarginDepositsAndOtherPrepaidExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_MarginAndPrepaymentAmountsIncludedInOtherAssets" name="MarginAndPrepaymentAmountsIncludedInOtherAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_MarginDepositsAndOtherPrepaidExpenses" name="MarginDepositsAndOtherPrepaidExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_MarkToMarketCommodityActivityNetAndOtherRevenue" name="MarkToMarketCommodityActivityNetAndOtherRevenue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_MarktoMarketGainLossonDerivativesIncludedinFuelandPurchasedEnergyExpense" name="MarktoMarketGainLossonDerivativesIncludedinFuelandPurchasedEnergyExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cpn_MarktoMarketGainLossonDerivativesincludedinOperatingRevenues" name="MarktoMarketGainLossonDerivativesincludedinOperatingRevenues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_NaturalGasAndPowerPrepayments" name="NaturalGasAndPowerPrepayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_Naturalgascontractsincludedinfuelandpurchasedenergyexpense" name="Naturalgascontractsincludedinfuelandpurchasedenergyexpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_NonCashGainsLossesOnExtinguishmentOfDebt" name="NonCashGainsLossesOnExtinguishmentOfDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cpn_NonmonetaryNotionalAmountOfPriceRiskDerivativesNaturalGas" name="NonmonetaryNotionalAmountOfPriceRiskDerivativesNaturalGas" nillable="true" substitutionGroup="xbrli:item" type="num:energyItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_NorthMember" name="NorthMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_NotesPayableOtherPayablesDisclosure" name="NotesPayableOtherPayablesDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cpn_Numberof525MWgenerationblockstobeacquiredintheGuadalupeacquisition" name="Numberof525MWgenerationblockstobeacquiredintheGuadalupeacquisition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_Numberofpowerplantstobedisposedof" name="Numberofpowerplantstobedisposedof" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_OnetaEnergyCenterMember" name="OnetaEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_OtherRestrictedCashMember" name="OtherRestrictedCashMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_OwnershipPercentageBeforeDivestitureOfBusiness" name="OwnershipPercentageBeforeDivestitureOfBusiness" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="cpn_PercentageOfSubGrantsRepresentingTotal" name="PercentageOfSubGrantsRepresentingTotal" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_PhysicalPowerMember" name="PhysicalPowerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_PowerCongestionProductsMember" name="PowerCongestionProductsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_PowerContractsIncludedInOperatingRevenues" name="PowerContractsIncludedInOperatingRevenues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cpn_PowerGenerationCapacity" name="PowerGenerationCapacity" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_PowerPlantAxis" name="PowerPlantAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_PowerPlantDomain" name="PowerPlantDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_PropertyPlantAndEquipmentGrossLessAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" name="PropertyPlantAndEquipmentGrossLessAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_ProrataShareOfEquityMethodInvestmentSummarizedFinancialInformationDebt" name="ProrataShareOfEquityMethodInvestmentSummarizedFinancialInformationDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_PurchasePriceofCommonStockPurchasedfromShareholder" name="PurchasePriceofCommonStockPurchasedfromShareholder" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cpn_PutOptionExercisePeriod" name="PutOptionExercisePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="cpn_RealizedUnrealizedGainLossByInstrumentTableTextBlock" name="RealizedUnrealizedGainLossByInstrumentTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_ReconciliationofBasictoDilutedWeightedAverageSharesAbstract" name="ReconciliationofBasictoDilutedWeightedAverageSharesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_RentReserveMember" name="RentReserveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_RevenuefromExternalCustomer" name="RevenuefromExternalCustomer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SantaRosaEnergyCenterMember" name="SantaRosaEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SecurityProjectInsuranceMember" name="SecurityProjectInsuranceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SeniorUnsecuredNotes2023Member" name="SeniorUnsecuredNotes2023Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SeniorUnsecuredNotes2025Member" name="SeniorUnsecuredNotes2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationMaximumRange" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationMaximumRange" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationMinimumRange" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationMinimumRange" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_ShareholderOwnershipPercentage" name="ShareholderOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_ShareholderTransactionAbstract" name="ShareholderTransactionAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_ShareholderTransactionDisclosureTextBlock" name="ShareholderTransactionDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SixPowerPlantsMember" name="SixPowerPlantsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_SixPowerPlantsTobedisposedofTableTextBlock" name="SixPowerPlantsTobedisposedofTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_SoutheastMember" name="SoutheastMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_SubsidiariesTermLoan" name="SubsidiariesTermLoan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="cpn_UseOfCollateralAbstract" name="UseOfCollateralAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_UseOfCollateralTextBlock" name="UseOfCollateralTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_UseOfCollateralTextualsAbstract" name="UseOfCollateralTextualsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_VariableInterestEntitiesAndUnconsolidatedInvestmentsAbstract" name="VariableInterestEntitiesAndUnconsolidatedInvestmentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VariableInterestEntitiesAndUnconsolidatedInvestmentsTextBlock" name="VariableInterestEntitiesAndUnconsolidatedInvestmentsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_VariousProjectFinancingFacilitiesMember" name="VariousProjectFinancingFacilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestTermOfFirstSubGrant" name="VestTermOfFirstSubGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestTermOfSecondSubGrant" name="VestTermOfSecondSubGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestTermOfThirdSubGrant" name="VestTermOfThirdSubGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestingPeriodForGradedAndCliffVestingOptionsMaximum" name="VestingPeriodForGradedAndCliffVestingOptionsMaximum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestingPeriodForGradedAndCliffVestingOptionsMinimum" name="VestingPeriodForGradedAndCliffVestingOptionsMinimum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_VestingTermOfOptionGrantsWithThreeYearCliffVesting" name="VestingTermOfOptionGrantsWithThreeYearCliffVesting" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_WestMember" name="WestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cpn_WhitbyMember" name="WhitbyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cpn_WorkingCapitalAdjustmenttoSaleprice" name="WorkingCapitalAdjustmenttoSaleprice" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>


