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1、1PumpedStorageHydro-PlantModelsforSystemTransientandLong-TermDynamicStudiesJiaqiLiang,StudentMember,IEEE,andRonaldG.Harley,Fellow,IEEEAbstract—ThedetaileddynamicmodelingofpumpedstorageTABLEIhydro-plantsforsystemdynamicstudiesisrevisitedinthispaper.TYPICALSTA
2、RT-UPTIMEOFAPUMPEDSTORAGEPLANT[1]BothrigidandelasticdynamicmodelsfordifferentwatertunnelModeConditionResponseTimepenstockconfigurationsarepresented.DuringthegeneratingGeneratingShutdowntoon-line60to90secondsmode,thesystemismodeledfollowingtheconventionalmode
3、lingGeneratingOn-linetofullloadgenerating5to15secondsmethodforhydro-turbines.Duringthepumpingmode,thesystemPumpingShutdowntonormalpumping6minutesismodeledusingthepumphead-flowcurve,andthegatingeffectsPumpingSpinning-in-airtonormalpumping60secondsareintroduce
4、dasanadditionalfrictiontothesystem.Differentplantoperatingconditionsunderdifferentsystemcontingenciessystemdynamicswithandwithoutmodelingtheelasticwateraresimulatedtostudythetransientandthelong-termdynamiceffectinthepenstockwerecomparedin[6].However,therespo
5、nses.Theresultsshowthatarigidmodelissufficientforsystemtransientdynamicstudies,whileanelasticmodelismoremodelwasbasedonthefourquadrantoperatingcharacteristicsaccurateforlong-termdynamicstudies.ofareversiblepump-turbine.Thesefourquadrantcharacteristiccurves[1
6、0]aregenerallydifficulttoobtainandmainlyrepresentsteady-stateperformances.ThedynamicIndexTerms—PumpedStorage,Pump-Turbine,Dynamicmodeldevelopedin[9]alsoreliedonthesefourquadrantModeling,Long-TermDynamicscharacteristiccurves.However,noneoftheabovepublications
7、discussedtheeffectofacommonwatertunnelconnectedtoI.INTRODUCTIONmultiplepenstocks,whichcouplesthehydraulicdynamicsofPUMPEDstoragehydro-plantsarecommonlyusedforloadmultiplepump-turbineunits.balancinginpowersystems.ItstoreselectricenergybyTheeffectofacommonwate
8、rtunnelwithmultiplepumpingwaterfromalowerelevationreservoirtoahigherpenstockshasbeenmodeledfortraditionalhydro-turbineelevationduringlow-costoff-peaktimeandreleasesthewatersystems[11],[12],butno
