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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ --> |
<!-- Creation Date : 2020-02-28T01:33:36.0294690+00:00 --> |
<!-- Version : 5.0.1.321 --> |
<!-- Package ID : a20c0530e0294b7a9b400f808490e776 --> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate" xlink:type="locator" xlink:label="us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_PowerGenerationCapacityMegawatts" xlink:type="locator" xlink:label="ck91882_PowerGenerationCapacityMegawatts"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditConcentrationRiskMember" xlink:type="locator" xlink:label="us-gaap_CreditConcentrationRiskMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskTypeDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskTypeDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableMember" xlink:type="locator" xlink:label="us-gaap_AccountsReceivableMember"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_2"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TurbineMember" xlink:type="locator" xlink:label="ck91882_TurbineMember"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_NaturalGasStorageMember" order="10150.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_OtherEnergyEquipmentMember" order="10170.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService" order="10200.00" priority="2" use="optional"/> |
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| <link:definitionLink xlink:type="extended" xlink:role="http://www.sceg.com/20191231/taxonomy/role/DisclosureRateAndOtherRegulatoryMattersNarrativeDetail"> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_RemainingLivesOfRelatedPropertyPeriod" xlink:type="locator" xlink:label="ck91882_RemainingLivesOfRelatedPropertyPeriod"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_EnvironmentalRemediation" xlink:type="locator" xlink:label="ck91882_EnvironmentalRemediation"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ChangesInFairValueAndPaymentsOfInterestRateDerivativesNotDesignedAmortizedToInterestYear" xlink:type="locator" xlink:label="ck91882_ChangesInFairValueAndPaymentsOfInterestRateDerivativesNotDesignedAmortizedToInterestYear"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ChangesInFairValueAndPaymentsOfInterestRateDerivativesDesignatedAsCashFlowHedgeAmortizedToInterestExpenseYear" xlink:type="locator" xlink:label="ck91882_ChangesInFairValueAndPaymentsOfInterestRateDerivativesDesignatedAsCashFlowHedgeAmortizedToInterestExpenseYear"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAssetAmortizationPeriod" xlink:type="locator" xlink:label="us-gaap_RegulatoryAssetAmortizationPeriod"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_RemainingUsefulLivesOfCoalFiredGeneratingUnits" xlink:type="locator" xlink:label="ck91882_RemainingUsefulLivesOfCoalFiredGeneratingUnits"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1" xlink:type="locator" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAssetRecoveryAssessments" xlink:type="locator" xlink:label="us-gaap_RegulatoryAssetRecoveryAssessments"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryCurrentAssetEndDateForRecovery" xlink:type="locator" xlink:label="us-gaap_RegulatoryCurrentAssetEndDateForRecovery"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ElectricServiceCustomersOverPeriod" xlink:type="locator" xlink:label="ck91882_ElectricServiceCustomersOverPeriod"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SCPSCRevenueRequirementApproved" xlink:type="locator" xlink:label="ck91882_SCPSCRevenueRequirementApproved"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SCPSCIncreaseInNaturalGasRates" xlink:type="locator" xlink:label="ck91882_SCPSCIncreaseInNaturalGasRates"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SCPSCRevenueRequirement" xlink:type="locator" xlink:label="ck91882_SCPSCRevenueRequirement"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DESCPensionCostsRiderApprovedBySouthCarolinaCommission" xlink:type="locator" xlink:label="ck91882_DESCPensionCostsRiderApprovedBySouthCarolinaCommission"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SCPSCOrderAnnualDSMProgramRateRiderRecoveryAmount" xlink:type="locator" xlink:label="ck91882_SCPSCOrderAnnualDSMProgramRateRiderRecoveryAmount"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TransmissionLineCapacity" xlink:type="locator" xlink:label="ck91882_TransmissionLineCapacity"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TransmissionLinesLengthOfMilesToBeApproved" xlink:type="locator" xlink:label="ck91882_TransmissionLinesLengthOfMilesToBeApproved"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsInPowerAndDistributionProjects" xlink:type="locator" xlink:label="us-gaap_InvestmentsInPowerAndDistributionProjects"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_NumberOfNuclearPlantsUnderDevelopment" xlink:type="locator" xlink:label="ck91882_NumberOfNuclearPlantsUnderDevelopment"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SouthCarolinaCommissionOrderNumberOfPetitionsGranted" xlink:type="locator" xlink:label="ck91882_SouthCarolinaCommissionOrderNumberOfPetitionsGranted"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DeferredTaxAssetDeferredFuelCost" xlink:type="locator" xlink:label="ck91882_DeferredTaxAssetDeferredFuelCost"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_UtilitiesOperatingExpenseNetOfTax" xlink:type="locator" xlink:label="ck91882_UtilitiesOperatingExpenseNetOfTax"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:type="locator" xlink:label="us-gaap_UtilitiesOperatingExpense"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount" xlink:type="locator" xlink:label="us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilitiesApprovedRateIncreaseDecreasePercentage" xlink:type="locator" xlink:label="us-gaap_PublicUtilitiesApprovedRateIncreaseDecreasePercentage"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_PublicUtilitiesPercentageChangeInRetailElectricRatesApprovedUnderBLRA" xlink:type="locator" xlink:label="ck91882_PublicUtilitiesPercentageChangeInRetailElectricRatesApprovedUnderBLRA"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_CreditsToCustomerRelatedToTaxAct" xlink:type="locator" xlink:label="ck91882_CreditsToCustomerRelatedToTaxAct"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_InterestChargesBenefitAfterTax" xlink:type="locator" xlink:label="ck91882_InterestChargesBenefitAfterTax"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_InterestChargesBenefit" xlink:type="locator" xlink:label="ck91882_InterestChargesBenefit"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ReserveForRefundsToElectricUtilityCustomersMember" xlink:type="locator" xlink:label="ck91882_ReserveForRefundsToElectricUtilityCustomersMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxChargesMember" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxChargesMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SettlementProceedsMember" xlink:type="locator" xlink:label="ck91882_SettlementProceedsMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryLiabilityDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryLiabilityDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:type="locator" xlink:label="us-gaap_RegulatoryLiabilityAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EnvironmentalRestorationCostsMember" xlink:type="locator" xlink:label="us-gaap_EnvironmentalRestorationCostsMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DeferredLossesOrGainsOnInterestRateDerivativesMember" xlink:type="locator" xlink:label="ck91882_DeferredLossesOrGainsOnInterestRateDerivativesMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:type="locator" xlink:label="us-gaap_DerivativeContractTypeDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:type="locator" xlink:label="us-gaap_DerivativeContractTypeDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:type="locator" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossOnReacquiredDebtMember" xlink:type="locator" xlink:label="us-gaap_LossOnReacquiredDebtMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetRetirementObligationCostsMember" xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligationCostsMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DemandSideManagementprogramsMember" xlink:type="locator" xlink:label="ck91882_DemandSideManagementprogramsMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_UnrecoveredPlantMember" xlink:type="locator" xlink:label="ck91882_UnrecoveredPlantMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PensionCostsMember" xlink:type="locator" xlink:label="us-gaap_PensionCostsMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_NNDProjectCostsMember" xlink:type="locator" xlink:label="ck91882_NNDProjectCostsMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TransmissionProjectMember" xlink:type="locator" xlink:label="ck91882_TransmissionProjectMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryAssetDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryAssetDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:type="locator" xlink:label="us-gaap_RegulatoryAssetAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ElectricOperationsMember" xlink:type="locator" xlink:label="ck91882_ElectricOperationsMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:type="locator" xlink:label="us-gaap_SegmentDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:type="locator" xlink:label="us-gaap_SegmentDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember" xlink:type="locator" xlink:label="srt_ScenarioForecastMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis" xlink:type="locator" xlink:label="srt_StatementScenarioAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DESCMember" xlink:type="locator" xlink:label="ck91882_DESCMember"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SavannahRiverSiteMember" xlink:type="locator" xlink:label="ck91882_SavannahRiverSiteMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryAgencyDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAgencyDomain" xlink:type="locator" xlink:label="us-gaap_RegulatoryAgencyDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RegulatoryAgencyAxis" xlink:type="locator" xlink:label="us-gaap_RegulatoryAgencyAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_RateAndOtherRegulatoryMattersTable" xlink:type="locator" xlink:label="ck91882_RateAndOtherRegulatoryMattersTable"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_RateAndOtherRegulatoryMattersLineItems" xlink:type="locator" xlink:label="ck91882_RateAndOtherRegulatoryMattersLineItems"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ck91882_RateAndOtherRegulatoryMattersLineItems" xlink:to="ck91882_RateAndOtherRegulatoryMattersTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ck91882_RateAndOtherRegulatoryMattersTable" xlink:to="us-gaap_RegulatoryAgencyAxis" order="10040.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RegulatoryAgencyAxis" xlink:to="us-gaap_RegulatoryAgencyDomain_2" order="10050.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RegulatoryAgencyAxis" xlink:to="us-gaap_RegulatoryAgencyDomain" order="10070.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RegulatoryAgencyDomain" xlink:to="ck91882_SavannahRiverSiteMember" order="10090.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ck91882_RateAndOtherRegulatoryMattersTable" xlink:to="dei_LegalEntityAxis" order="10120.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck91882_DESCMember" order="10170.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain_2" order="10250.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" order="10270.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_CostOfFuelUnderCollectionsMember" xlink:type="locator" xlink:label="ck91882_CostOfFuelUnderCollectionsMember"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfStockByClassTable"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ScheduleOfStockByClassTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiability" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseLiability"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:type="locator" xlink:label="us-gaap_LongTermDebtCurrent"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:type="locator" xlink:label="us-gaap_DebtWeightedAverageInterestRate"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_GencoMember" xlink:type="locator" xlink:label="ck91882_GencoMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DESCMember" xlink:type="locator" xlink:label="ck91882_DESCMember"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_FinanceLeaseMember" xlink:type="locator" xlink:label="ck91882_FinanceLeaseMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TwoPointNineFourPercentMember" xlink:type="locator" xlink:label="ck91882_TwoPointNineFourPercentMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ThreePointZeroFivePercentAffiliatedNoteMember" xlink:type="locator" xlink:label="ck91882_ThreePointZeroFivePercentAffiliatedNoteMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_FivePointFourNinePercentSeniorSecuredNotesMember" xlink:type="locator" xlink:label="ck91882_FivePointFourNinePercentSeniorSecuredNotesMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_OtherDebtMember" xlink:type="locator" xlink:label="ck91882_OtherDebtMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_TaxExemptFinancingsThreePointSixTwoFiveAndFourDueTwoThousandAndTwentyEightAndTwoThousandThirtyThreeMember" xlink:type="locator" xlink:label="ck91882_TaxExemptFinancingsThreePointSixTwoFiveAndFourDueTwoThousandAndTwentyEightAndTwoThousandThirtyThreeMember"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_LongtermDebtTypeAxis" order="10040.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebt" order="11770.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DebtInstrumentMaturityYear" xlink:type="locator" xlink:label="ck91882_DebtInstrumentMaturityYear"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DESCMember" xlink:type="locator" xlink:label="ck91882_DESCMember"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_FinanceLeaseMember" xlink:type="locator" xlink:label="ck91882_FinanceLeaseMember"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LetterOfCreditMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LineOfCreditMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DominionEnergyMember" xlink:type="locator" xlink:label="ck91882_DominionEnergyMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_CurrentJointRevolvingCreditFacilityMember" xlink:type="locator" xlink:label="ck91882_CurrentJointRevolvingCreditFacilityMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_FivePointFourNinePercentSeniorSecuredNotesMember" xlink:type="locator" xlink:label="ck91882_FivePointFourNinePercentSeniorSecuredNotesMember"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ThreePointZeroFivePercentPromissoryNoteMember" xlink:type="locator" xlink:label="ck91882_ThreePointZeroFivePercentPromissoryNoteMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_GencoMember" xlink:type="locator" xlink:label="ck91882_GencoMember"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="dei_LegalEntityAxis" order="10040.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" order="10070.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck91882_GencoMember" order="10090.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_LongtermDebtTypeAxis" order="10200.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeDomain" order="10230.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="ck91882_ThreePointZeroFivePercentPromissoryNoteMember" order="10250.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="ck91882_FivePointFourNinePercentSeniorSecuredNotesMember" order="10270.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="10280.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain_2" order="10290.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="10310.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck91882_CurrentJointRevolvingCreditFacilityMember" order="10330.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="10340.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="10370.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck91882_DominionEnergyMember" order="10390.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LineOfCreditMember" order="10470.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LetterOfCreditMember" order="10490.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_RangeAxis" order="10580.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" order="10610.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" order="10670.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_SubsequentEventTypeAxis" order="10680.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck91882_UnfundedPropertyAdditions" order="10920.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck91882_ConsecutivePeriodForBondRatio" order="10940.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck91882_PeriodPrecedingIssuanceOfBonds" order="10960.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_RepaymentsOfLongTermDebt" order="11190.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_PaymentsOfCapitalDistribution" order="11230.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpense" order="11800.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DueFromRelatedParties" order="11990.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaper" xlink:type="locator" xlink:label="us-gaap_CommercialPaper"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck91882_CurrentJointRevolvingCreditFacilityMember" order="10090.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck91882_PreviousJointRevolvingCreditFacilityMember" order="10150.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" order="10180.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_CommercialPaper" order="10220.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LettersOfCreditOutstandingAmount" order="10260.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService" order="10280.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentGross" order="10640.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_OwnershipInterest" xlink:type="locator" xlink:label="ck91882_OwnershipInterest"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_PercentageOfOwnershipInterestPurchased" xlink:type="locator" xlink:label="ck91882_PercentageOfOwnershipInterestPurchased"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseMember" xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:type="locator" xlink:label="us-gaap_IncomeStatementLocationAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_WarrantyServiceContractAssetsMember" xlink:type="locator" xlink:label="ck91882_WarrantyServiceContractAssetsMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UtilityPlantDomain" xlink:type="locator" xlink:label="us-gaap_UtilityPlantDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UtilityPlantDomain" xlink:type="locator" xlink:label="us-gaap_UtilityPlantDomain_2"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PublicUtilityAxis" xlink:type="locator" xlink:label="us-gaap_PublicUtilityAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_VCSummerNuclearPowerStationMember" xlink:type="locator" xlink:label="ck91882_VCSummerNuclearPowerStationMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_NNDProjectMember" xlink:type="locator" xlink:label="ck91882_NNDProjectMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProjectMember" xlink:type="locator" xlink:label="us-gaap_ProjectMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis" xlink:type="locator" xlink:label="us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SanteeCoopersMember" xlink:type="locator" xlink:label="ck91882_SanteeCoopersMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipDomain" xlink:type="locator" xlink:label="srt_OwnershipDomain"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipDomain" xlink:type="locator" xlink:label="srt_OwnershipDomain_2"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_UtilityPlantAndNonUtilityPropertyTable" xlink:type="locator" xlink:label="ck91882_UtilityPlantAndNonUtilityPropertyTable"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare" order="10180.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService" order="10220.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation" order="10260.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress" order="10300.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_RelatedPartyPurchasesCostOfGas" xlink:type="locator" xlink:label="ck91882_RelatedPartyPurchasesCostOfGas"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_UtilitiesOperatingExpenseFuelUsedAffiliate" xlink:type="locator" xlink:label="ck91882_UtilitiesOperatingExpenseFuelUsedAffiliate"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:type="locator" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SCANACombinationMember" xlink:type="locator" xlink:label="ck91882_SCANACombinationMember"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsDomain" xlink:type="locator" xlink:label="us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsDomain"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember"/> |
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| | <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_CanadysRefinedCoalMember" xlink:type="locator" xlink:label="ck91882_CanadysRefinedCoalMember"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="10010.00" priority="2" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="10040.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="10070.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck91882_SolarAffiliatesMember" order="10150.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DueToAffiliateCurrent" order="10510.00" priority="2" use="optional"/> |
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| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck91882_RelatedPartyPurchasesCostOfGas" order="10570.00" priority="2" use="optional"/> |
| | <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_DueFromAffiliateCurrent" order="10610.00" priority="2" use="optional"/> |
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| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_GasDomesticRegulatedRevenuesAffiliate" xlink:type="locator" xlink:label="ck91882_GasDomesticRegulatedRevenuesAffiliate"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_ElectricDomesticRegulatedRevenuesAffiliate" xlink:type="locator" xlink:label="ck91882_ElectricDomesticRegulatedRevenuesAffiliate"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_UtilitiesOperatingExpenseFuelUsedAffiliate" xlink:type="locator" xlink:label="ck91882_UtilitiesOperatingExpenseFuelUsedAffiliate"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_SalesToAffiliates" xlink:type="locator" xlink:label="ck91882_SalesToAffiliates"/> |
| | <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty"/> |
| | <link:loc xlink:href="ck91882-20191231.xsd#ck91882_DESSMember" xlink:type="locator" xlink:label="ck91882_DESSMember"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain"/> |
| | <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis"/> |
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