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  <xsd:element abstract="true" id="oge_ComponentOfAccumulatedOtherComprehensiveIncomeAxis" name="ComponentOfAccumulatedOtherComprehensiveIncomeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ComponentOfAccumulatedOtherComprehensiveIncomeLossDomain" name="ComponentOfAccumulatedOtherComprehensiveIncomeLossDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ComponentsOfBenefitObligationRegulatoryAsset" name="ComponentsOfBenefitObligationRegulatoryAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_ComponentsOfBenefitObligationRegulatoryAssetAxis" name="ComponentsOfBenefitObligationRegulatoryAssetAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ComponentsOfBenefitObligationRegulatoryAssetDomain" name="ComponentsOfBenefitObligationRegulatoryAssetDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ComponentsOfBenefitObligationRegulatoryAssetTableTextBlock" name="ComponentsOfBenefitObligationRegulatoryAssetTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ComponentsOfNetPeriodicBenefitCostsToBeRecognizedInNextFiscalYear" name="ComponentsOfNetPeriodicBenefitCostsToBeRecognizedInNextFiscalYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_ContractAmount" name="ContractAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_ContributionsToPayDownShortTermDebt" name="ContributionsToPayDownShortTermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_CpvKeenanMember" name="CpvKeenanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_CrossroadsWindFarmRiderOverRecoveryMember" name="CrossroadsWindFarmRiderOverRecoveryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_CrossroadsWindFarmRiderUnderRecoveryMember" name="CrossroadsWindFarmRiderUnderRecoveryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_CumulativeEffectofNetDeferredTaxesMember" name="CumulativeEffectofNetDeferredTaxesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_CurrentDeferredTaxAssetsFederalTaxCredits" name="CurrentDeferredTaxAssetsFederalTaxCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="oge_DebtRestrictionMaximumLettersofCredit" name="DebtRestrictionMaximumLettersofCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_December132017Member" name="December132017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_Deconsolidationofsubsidiary" name="Deconsolidationofsubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_DeferredIncomeTaxesAttributableToContributionsFromNoncontrollingInterestPartners" name="DeferredIncomeTaxesAttributableToContributionsFromNoncontrollingInterestPartners" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DeferredPensionCreditMember" name="DeferredPensionCreditMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DeferredStormExpensesMember" name="DeferredStormExpensesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_DeferredTaxLiabilitiesIncomeTaxesRefundableToCustomersNet" name="DeferredTaxLiabilitiesIncomeTaxesRefundableToCustomersNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_DeferredTaxLiabilitiesUnamortizedBondRedemptionCosts" name="DeferredTaxLiabilitiesUnamortizedBondRedemptionCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_DefinedBenefitPlanNetPeriodicBenefitCostNetOfUnconsolidatedAffiliates" name="DefinedBenefitPlanNetPeriodicBenefitCostNetOfUnconsolidatedAffiliates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DefinedBenefitPlanPriorServiceCostMember" name="DefinedBenefitPlanPriorServiceCostMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DefinedBenefitPlansIncomeLossMember" name="DefinedBenefitPlansIncomeLossMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DefinedBenefitPostretirementPlansAbstract" name="DefinedBenefitPostretirementPlansAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_DilutionandImpairmentLoss" name="DilutionandImpairmentLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_DividendsCommonStockCashNumberofShares" name="DividendsCommonStockCashNumberofShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DomesticAllCaplargeCapEquityMember" name="DomesticAllCaplargeCapEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DomesticMidCapEquityMember" name="DomesticMidCapEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DomesticSmallCapEquityMember" name="DomesticSmallCapEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DryScrubberProjectMember" name="DryScrubberProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_DueAugust312062Member" name="DueAugust312062Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EdisonMissionEnergyMember" name="EdisonMissionEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EffectiveIncomeTaxRateReconciliationAmortizationOfNetUnfundedDeferredTaxes" name="EffectiveIncomeTaxRateReconciliationAmortizationOfNetUnfundedDeferredTaxes" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxLiabilitiesValuationAllowancePercent" name="EffectiveIncomeTaxRateReconciliationChangeinDeferredTaxLiabilitiesValuationAllowancePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ElectricUtilityMember" name="ElectricUtilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EmployeeServiceSharebasedCompensationUnrecognizedTaxBenefitfromCompensationExpense" name="EmployeeServiceSharebasedCompensationUnrecognizedTaxBenefitfromCompensationExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_EmploymentCostsMember" name="EmploymentCostsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnableGasTransportationandStorageAgreementAxis" name="EnableGasTransportationandStorageAgreementAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnableGasTransportationandStorageAgreementDomain" name="EnableGasTransportationandStorageAgreementDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnableGasTransportationandStorageAgreementMember" name="EnableGasTransportationandStorageAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnableMidstreamPartnersMember" name="EnableMidstreamPartnersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnogexLlcMember" name="EnogexLlcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnogexMember" name="EnogexMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnvironmentalComplianceAxis" name="EnvironmentalComplianceAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnvironmentalComplianceDomain" name="EnvironmentalComplianceDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_EnvironmentalCompliancePlanMember" name="EnvironmentalCompliancePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityInstrumentsOtherThanOptionsConvertedAggregrateIntrinsicValue" name="EquityInstrumentsOtherThanOptionsConvertedAggregrateIntrinsicValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityInstrumentsOtherThanOptionsConvertedInPeriod" name="EquityInstrumentsOtherThanOptionsConvertedInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityInstrumentsOtherThanOptionsModification" name="EquityInstrumentsOtherThanOptionsModification" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityMethodInvestmentSummarizedFinancialInformationOperatingIncome" name="EquityMethodInvestmentSummarizedFinancialInformationOperatingIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityinEarningsAmortizationofBasisDifference" name="EquityinEarningsAmortizationofBasisDifference" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_EquityinEarningsEliminationofFairValueAdjustments" name="EquityinEarningsEliminationofFairValueAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_EstimatedEnvironmentalCapitalCosts" name="EstimatedEnvironmentalCapitalCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_ExcludingFuelPurchasesMember" name="ExcludingFuelPurchasesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ExercisedStockOptionsTableTextBlock" name="ExercisedStockOptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ExpectedSettlementCharge" name="ExpectedSettlementCharge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FERCMember" name="FERCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_FactoredFiredHours" name="FactoredFiredHours" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_FactoredFiredStarts" name="FactoredFiredStarts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAdministrativeExpensesAndCharges" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAdministrativeExpensesAndCharges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisClaimsPaid" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisClaimsPaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDividends" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDividends" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInterestIncome" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInterestIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGains" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGains" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisRealizedGainsLosses" name="FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisRealizedGainsLosses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueOfVestedPerformanceUnitsAndRestrictedStock" name="FairValueOfVestedPerformanceUnitsAndRestrictedStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_FairValueOfVestedPerformanceUnitsAndRestrictedStockTableTextBlock" name="FairValueOfVestedPerformanceUnitsAndRestrictedStockTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FederalEnergyRegulatoryCommissionMember" name="FederalEnergyRegulatoryCommissionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FederalOperatingLossMemberMember" name="FederalOperatingLossMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FederalTaxCreditsMemberMember" name="FederalTaxCreditsMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FederaloperatinglossMember" name="FederaloperatinglossMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_Federaltaxpercentagerevaluation" name="Federaltaxpercentagerevaluation" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_FinalRateBasedCarbonReduction" name="FinalRateBasedCarbonReduction" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_FiniteLivedIntangibleAssetsMajorClassNameMember" name="FiniteLivedIntangibleAssetsMajorClassNameMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FplEnergyMember" name="FplEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_FuelInventoriesAbstract" name="FuelInventoriesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_GarfieldIndustrialAuthorityBondMember" name="GarfieldIndustrialAuthorityBondMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_GroupRetireeMedicalInsuranceContractMember" name="GroupRetireeMedicalInsuranceContractMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_IncomeTaxesAbstract" name="IncomeTaxesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_IncomeTaxesRecoverableFromCustomersNetMember" name="IncomeTaxesRecoverableFromCustomersNetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_IncreaseDecreaseInDeferredFuelCostsCurrentLiabilities" name="IncreaseDecreaseInDeferredFuelCostsCurrentLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_IncreaseDecreaseInRegulatoryAssetsNoncurrent" name="IncreaseDecreaseInRegulatoryAssetsNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_IncreaseDecreaseInRegulatoryLiabilitiesNoncurrent" name="IncreaseDecreaseInRegulatoryLiabilitiesNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_IncreasedRegulatoryLiabilitiesduetoIncomeTaxes" name="IncreasedRegulatoryLiabilitiesduetoIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_Increasedecreaseindistributionsfromunconsolidatedaffiliates" name="Increasedecreaseindistributionsfromunconsolidatedaffiliates" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_IncreaseinFairValueofNetAssets" name="IncreaseinFairValueofNetAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_IndexFundMember" name="IndexFundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_InstallmentPaymentsForTinkerElectricDistributionSystem" name="InstallmentPaymentsForTinkerElectricDistributionSystem" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_InterestAndDividendsReceivableMember" name="InterestAndDividendsReceivableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_InterimRateCollected" name="InterimRateCollected" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_InterimRateRefundAmount" name="InterimRateRefundAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_InterimRateRevenueReserved" name="InterimRateRevenueReserved" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_InternationalEquityMember" name="InternationalEquityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_InvestmentinEnable" name="InvestmentinEnable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_InvestmentsSinceLastRateCase" name="InvestmentsSinceLastRateCase" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_January162018Member" name="January162018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_JurisdictionDomain" name="JurisdictionDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_LessThan90Member" name="LessThan90Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_LimitedPartnerUnitsOwned" name="LimitedPartnerUnitsOwned" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_LostRevenueAssociatedwithCustomerPrograms" name="LostRevenueAssociatedwithCustomerPrograms" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_LostRevenueAssociatedwithCustomerProgramsrecoveredannually" name="LostRevenueAssociatedwithCustomerProgramsrecoveredannually" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_LouisianainventorycreditsMemberMemberDomain" name="LouisianainventorycreditsMemberMemberDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_MassBasedCarbonReduction" name="MassBasedCarbonReduction" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_MaximumPayoutRange" name="MaximumPayoutRange" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_McclainPlantMember" name="McclainPlantMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_MedicareSubsidiesReceived" name="MedicareSubsidiesReceived" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_MinimumPayoutRange" name="MinimumPayoutRange" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_MuskogeeIndustrialAuthorityBondDue2025Member" name="MuskogeeIndustrialAuthorityBondDue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_MuskogeeIndustrialAuthorityBondDue2027Member" name="MuskogeeIndustrialAuthorityBondDue2027Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_MustangModernizationMember" name="MustangModernizationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NaturalGasMidstreamOperationsMember" name="NaturalGasMidstreamOperationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NaturalGasPurchasesMember" name="NaturalGasPurchasesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NaturalGasStorageMember" name="NaturalGasStorageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NaturalGasTransportationMember" name="NaturalGasTransportationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_NetEffectofSettlementonOtherComprehensiveIncomeandRegulatoryAssets" name="NetEffectofSettlementonOtherComprehensiveIncomeandRegulatoryAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_NetIncomeLossIncludingportionattributabletononcontrollinginterestNumberofShares" name="NetIncomeLossIncludingportionattributabletononcontrollinginterestNumberofShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_NetIncomeUsedtoCalculateEquityinEarnings" name="NetIncomeUsedtoCalculateEquityinEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NewLongTermServiceAgreementAxis" name="NewLongTermServiceAgreementAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NewLongTermServiceAgreementDomain" name="NewLongTermServiceAgreementDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NewSourceReviewMember" name="NewSourceReviewMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_NexteraEnergyMember" name="NexteraEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_NonCurrentDeferredTaxAssetNetOperatingLosses" name="NonCurrentDeferredTaxAssetNetOperatingLosses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="oge_NonCurrentDeferredTaxAssetsDeferredFederalInvestmentTaxCredits" name="NonCurrentDeferredTaxAssetsDeferredFederalInvestmentTaxCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="oge_NonCurrentDeferredTaxAssetsRegulatoryLiabilities" name="NonCurrentDeferredTaxAssetsRegulatoryLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="oge_NonCurrentDeferredTaxAssetsStateTaxCredits" name="NonCurrentDeferredTaxAssetsStateTaxCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="oge_NonCurrentDeferredTaxLiabilitiesInvestmentinEnableMidstreamPartners" name="NonCurrentDeferredTaxLiabilitiesInvestmentinEnableMidstreamPartners" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="oge_OgAndEIndustrialAuthorityBondsMember" name="OgAndEIndustrialAuthorityBondsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgAndEMember" name="OgAndEMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgAndESeniorNotesMember" name="OgAndESeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgAndETinkerDebtMember" name="OgAndETinkerDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeCapacityPaymentsMember" name="OgeCapacityPaymentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeCogenerationCapacityAndFixedOperationAndMaintenancePaymentsMember" name="OgeCogenerationCapacityAndFixedOperationAndMaintenancePaymentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeEnergyBuildingLeaseMember" name="OgeEnergyBuildingLeaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeEnergyCorpMember" name="OgeEnergyCorpMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeEnergyMember" name="OgeEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeEnergySeniorNotesMember" name="OgeEnergySeniorNotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeExpectedCogenerationEnergyPaymentsMember" name="OgeExpectedCogenerationEnergyPaymentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeExpectedWindPurchaseCommitmentsMember" name="OgeExpectedWindPurchaseCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeHoldingsMember" name="OgeHoldingsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeLongTermServiceAgreementCommitmentsMember" name="OgeLongTermServiceAgreementCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeMinimumFuelPurchaseCommitmentsMember" name="OgeMinimumFuelPurchaseCommitmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeRailcarLeaseAgreementMember" name="OgeRailcarLeaseAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeTotalCogenerationPaymentsMember" name="OgeTotalCogenerationPaymentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OgeWindFarmLandLeaseAgreementsMember" name="OgeWindFarmLandLeaseAgreementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_OgesJurisdictionalRevenues" name="OgesJurisdictionalRevenues" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaAttorneyGeneralMember" name="OklahomaAttorneyGeneralMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaCapitalInvestmentBoardCreditsMemberMember" name="OklahomaCapitalInvestmentBoardCreditsMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaCorporationCommissionMember" name="OklahomaCorporationCommissionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaDemandProgramRiderUnderRecoveryMember" name="OklahomaDemandProgramRiderUnderRecoveryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaIndustrialElectricConsumersMember" name="OklahomaIndustrialElectricConsumersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaInvestmentTaxCreditsMemberMember" name="OklahomaInvestmentTaxCreditsMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaPublicUtilityDivisionStaffMember" name="OklahomaPublicUtilityDivisionStaffMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OklahomaZeroEmissionTaxCreditsMemberMember" name="OklahomaZeroEmissionTaxCreditsMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OperatingCostsChargedMember" name="OperatingCostsChargedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OperatingLeaseObligationsAxis" name="OperatingLeaseObligationsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OperatingLeaseObligationsDomain" name="OperatingLeaseObligationsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPensionPlansNetPriorServiceCostRecognizedinNetPeriodicPensionCostTax" name="OtherComprehensiveIncomeAmortizationOfDefinedBenefitPensionPlansNetPriorServiceCostRecognizedinNetPeriodicPensionCostTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPostretirementPlansNetPriorServiceCostRecognizedInNetPeriodicPostretirementCostNetOfTax" name="OtherComprehensiveIncomeAmortizationOfDefinedBenefitPostretirementPlansNetPriorServiceCostRecognizedInNetPeriodicPostretirementCostNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeAmortizationOfInterestRateSwapNetOfTax" name="OtherComprehensiveIncomeAmortizationOfInterestRateSwapNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeAmortizationofDefinedBenefitPensionPlanandRestorationNetPriorServiceCostRecognizedinNetPeriodicPensionCostNetofTax" name="OtherComprehensiveIncomeAmortizationofDefinedBenefitPensionPlanandRestorationNetPriorServiceCostRecognizedinNetPeriodicPensionCostNetofTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeLossAmortizationDefinedBenefitPostretirementPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostTaxEffect" name="OtherComprehensiveIncomeLossAmortizationDefinedBenefitPostretirementPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostTaxEffect" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeLossNetofTaxNumberofShares" name="OtherComprehensiveIncomeLossNetofTaxNumberofShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeLossPriorServiceCreditArisingDuringPeriodRecognizedInNetPeriodicBenefitCostTaxEffect" name="OtherComprehensiveIncomeLossPriorServiceCreditArisingDuringPeriodRecognizedInNetPeriodicBenefitCostTaxEffect" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIPensionandOtherPostretirementBenefitPlansSettlementCostbeforeTax" name="OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIPensionandOtherPostretirementBenefitPlansSettlementCostbeforeTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomePostretirementPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" name="OtherComprehensiveIncomePostretirementPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomePostretirementPlansNetUnamortizedGainLossArisingDuringPeriodTax" name="OtherComprehensiveIncomePostretirementPlansNetUnamortizedGainLossArisingDuringPeriodTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomePriorServiceCreditArisingDuringPeriodRecognizedInNetPeriodicPostretirementCostNetOfTax" name="OtherComprehensiveIncomePriorServiceCreditArisingDuringPeriodRecognizedInNetPeriodicPostretirementCostNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateSwapsIncludedInNetIncomeTax" name="OtherComprehensiveIncomeReclassificationAdjustmentOnInterestRateSwapsIncludedInNetIncomeTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPostretirementPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax" name="OtherComprehensiveIncomeReclassificationOfDefinedBenefitPostretirementPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPostretirementPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax" name="OtherComprehensiveIncomeReclassificationOfDefinedBenefitPostretirementPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OtherRegulatoryAssetsMember" name="OtherRegulatoryAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OtherRegulatoryLiabilitiesMember" name="OtherRegulatoryLiabilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_OtherpropertyandinvestmentsAbstract" name="OtherpropertyandinvestmentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ParentheticalAbstract" name="ParentheticalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PayableForeignCurrencyMember" name="PayableForeignCurrencyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PayableToBrokerForSecuritiesPurchasedMember" name="PayableToBrokerForSecuritiesPurchasedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PaymentsToAcquireProductiveAssetsIncludingPaymentsForBusinessCombination" name="PaymentsToAcquireProductiveAssetsIncludingPaymentsForBusinessCombination" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="oge_PensionPlanEquityAssetAllocationTableTableTextBlock" name="PensionPlanEquityAssetAllocationTableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PensionPlansMember" name="PensionPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PensionTrackerMember" name="PensionTrackerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PercentOfIncentiveDistributionRights" name="PercentOfIncentiveDistributionRights" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_PercentOfIntangiblePlantBalanceAmortizable" name="PercentOfIntangiblePlantBalanceAmortizable" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_PercentOfIntangiblePlantBalanceAmortizableThereafter" name="PercentOfIntangiblePlantBalanceAmortizableThereafter" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_PercentOfPrincipalAmountSubjectToOptionalTender" name="PercentOfPrincipalAmountSubjectToOptionalTender" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PercentageOfEnogexLlcContributed" name="PercentageOfEnogexLlcContributed" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_PercentageOfOutputPurchased" name="PercentageOfOutputPurchased" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PercentageShareOfManagementRights" name="PercentageShareOfManagementRights" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_Percentageofsubsidiarycontributed" name="Percentageofsubsidiarycontributed" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="oge_PerformanceUnitsEarningsPerShareValuationAssumptionsTableTextBlock" name="PerformanceUnitsEarningsPerShareValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PerformanceUnitsRelatedToEarningsPerShareMember" name="PerformanceUnitsRelatedToEarningsPerShareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PerformanceUnitsTotalShareholderReturnValuationAssumptionsTableTextBlock" name="PerformanceUnitsTotalShareholderReturnValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PeriodForWhichRegulatoryApprovalHasBeenGivenToAcquireShortTermDebt" name="PeriodForWhichRegulatoryApprovalHasBeenGivenToAcquireShortTermDebt" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PlanInvestmentsPoliciesAndStrategiesPolicyTextBlock" name="PlanInvestmentsPoliciesAndStrategiesPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PostretirementBenefitPlanMember" name="PostretirementBenefitPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsInYearFive" name="PostretirementPlanExpectedFutureBenefitPaymentsInYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsInYearFour" name="PostretirementPlanExpectedFutureBenefitPaymentsInYearFour" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsInYearOne" name="PostretirementPlanExpectedFutureBenefitPaymentsInYearOne" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsInYearThree" name="PostretirementPlanExpectedFutureBenefitPaymentsInYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsInYearTwo" name="PostretirementPlanExpectedFutureBenefitPaymentsInYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PostretirementPlanExpectedFutureBenefitPaymentsThereafter" name="PostretirementPlanExpectedFutureBenefitPaymentsThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="oge_PowerPlantLongTermServiceAgreement" name="PowerPlantLongTermServiceAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_PriorServiceCostMember" name="PriorServiceCostMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ProjectedBenefitObligationFundedStatusThresholds" name="ProjectedBenefitObligationFundedStatusThresholds" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ProjectedBenefitObligationFundedStatusThresholdsEquity" name="ProjectedBenefitObligationFundedStatusThresholdsEquity" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ProjectedBenefitObligationFundedStatusThresholdsFixedIncome" name="ProjectedBenefitObligationFundedStatusThresholdsFixedIncome" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_ProjectedBenefitObligationFundedStatusThresholdsTableTextBlock" name="ProjectedBenefitObligationFundedStatusThresholdsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="oge_Projectedprovisionfordepreciationinnextfiscalyear" name="Projectedprovisionfordepreciationinnextfiscalyear" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
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  <xsd:element id="oge_RateMattersAndRegulationTextBlock" name="RateMattersAndRegulationTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="oge_ReceivableForeignCurrencyMember" name="ReceivableForeignCurrencyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ReceivableFromBrokerForSecuritiesSoldMember" name="ReceivableFromBrokerForSecuritiesSoldMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_ReclassifiedSharesWithheldforEmployeeTaxesMember" name="ReclassifiedSharesWithheldforEmployeeTaxesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_Recommendation1Member" name="Recommendation1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="oge_RecommendedCapitalStructureEquityPercentage" name="RecommendedCapitalStructureEquityPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
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  <xsd:element id="oge_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestIntrinsicValue" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestIntrinsicValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element id="oge_ShortTermBorrowingCapacityThatHasRegulatoryApproval" name="ShortTermBorrowingCapacityThatHasRegulatoryApproval" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
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  <xsd:element abstract="true" id="oge_SmartHoursProgramMember" name="SmartHoursProgramMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="oge_TotalPlanInvestmentsMember" name="TotalPlanInvestmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_TotalPropertyPlantAndEquipmentMember" name="TotalPropertyPlantAndEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_TotalShareholderReturnMember" name="TotalShareholderReturnMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_TransmissionEquipmentMember" name="TransmissionEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_TreasuryfuturespayableMember" name="TreasuryfuturespayableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="oge_USCommonStocksMember" name="USCommonStocksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_USEquityMutualFundsInvestmentMember" name="USEquityMutualFundsInvestmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="oge_UninsuredJudgementsMember" name="UninsuredJudgementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
