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1、ARPA-EGrid-ScaleEnergyStorageWorkshopSummaryOctober4,2009SeattleRenaissanceHotelSeattle,Washington1DefiningtheneedforstoragePossiblestoragesolutionsEnergyStorageTechnologiesKeyFindingsSummary2EnergyStorageisrequiredtoconferreliabilitytorenewableenergysourcesandtoproducepowerwhenthel
2、oadoccursTexasPanhandleExampleWindgenerationdoesnot…butshapedwindwithcorrelatewellwithload…storageisasignificantasset.Predictableload,withaErraticwind450regularweeklypattern4,000450Someofthedeliveriesare4,000shapedtomeetintermediate400andpeakingneeds4003,5003,500350Load(MW)3503,000L
3、oad(MW)3,000300300Windoften2,5002,500250spikingduring250off-peak2,0002,000200periods200EnergyDelivery(MW)1,500EnergyDelivery(MW)1,5001501501,0001,000100100Windlowsduring50on-peakperiods50050Aportionofdeliveriesare“baseloaded”500tomeetroundtheclockneeds000012345671234567DayDayLoadMod
4、eledWindEnergyProductionLoadHybridStorageandWindEnergyProductionNotes:400MWofwindinTexasPanhandlemodeledinconjunctionw/localstoragefacility.Gridstorageparameters–400MWofcapacitySource:RidgeEnergyStorage.3Dependingonthetechnologyandapplication,energystoragecanprovideawidevarietyofben
5、efitsSupplyDeliveryRenewablesIntegrationT&DNetworkInvestmentDeferralUseofstoragetoprovidecapacityvalue,predictableUseofstoragetodefertheneedfornewtransmissionorscheduling,andtimeshiftingofintermittentrenewabledistributioncapacitytomeetdemandgrowthorpowersystemsgeneration,alongwithan
6、cillaryservicerequirementsrequirementsRateOptimizationT&DComponentLifeExtensionUsebycustomerstoreducedemandchargesandonUseofstoragetoreducemaximumloadingonthegridsegments,peakenergychargestherebyextendingthelifeofT&DassetsPriceArbitrage/PeakShavingTransmissionAccess/CongestionCharge
7、ManagementPurchaseofcheapenergyforcharging(offpeak),andUseofstoragetoavoidcongestionchargeswhendemandfordischargingtosellathighprices(onpeak)transmissionserviceishighCapacityValueT&DAssetUtilizationUseofstorageinplaceoftraditionalgenerationtomeetImprovecapitalreturnsoncapitalinvestm
8、entinT&Dinvestments
