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飞轮储能系统控制策略研究.docx

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飞轮储能系统控制策略研究 Title:ControlStrategiesforFlywheelEnergyStorageSystems Introduction: Withtheincreasingdemandforrenewableenergysourcesandtheintermittentnatureofsomeofthesesources,energystoragehasbecomeacrucialcomponentofmodernpowersystems.Flywheelenergystoragesystems(FESS)havegainedsignificantattentionduetotheirhighpowerdensity,fastresponsetime,andlongcyclelife.However,efficientcontrolstrategiesarerequiredtooptimizetheirperformanceandensurereliableoperation.ThispaperaimstoprovideanoverviewofvariouscontrolstrategiesforFESSandtheirimpactonsystemperformanceandstability. 1.BasicPrincipleofFlywheelEnergyStorageSystems: Firstly,abriefexplanationofthebasicprincipleofFESSisprovided.FESSconsistsofarotatingmass(flywheel)thatstoresenergyinitsrotationalmotion.Whenenergyisextractedorinjectedintothesystem,theflywheel'sspeedchanges,resultinginenergyconversion.TheprimarycomponentsofFESSincludetheflywheel,motor/generator,mechanicalbearings,andcontrolsystem. 2.ControlObjectives: ThecontrolstrategyforFESSmustachievespecificobjectives,including: 2.1EnergyManagement:Thecontrolsystemshouldmanagetheenergyflowbetweentheelectricalgridandflywheel,ensuringefficientcharginganddischargingoperations. 2.2Stability:StableoperationoftheFESSisessentialforgridintegration.Thecontrolstrategyshouldmaintaintheflywheeloperationwithinitssafeoperatinglimitsandpreventinstabilityorsystemfailures. 2.3PowerQuality:Thecontrolsystemshouldmaintainpowerqualityduringchargeanddischargeoperationstoavoidvoltageandfrequencydeviations. 3.ControlStrategiesforFESS: 3.1ConstantSpeedControl: Theconstantspeedcontrolstrategyaimstomaintaintheflywheelspeedconstantduringtheoperation.Thiscontrolmechanismadjuststheinput/outputpowerbasedontheenergydemand,therebyensuringastableenergysupplytothegrid.However,themajordrawbackisthatitdoesnotoptimizetheenergytransferefficiency. 3.2PowerRegulationControl: Thepowerregulationcontrolstrategyadjuststheflywheelspeedtocontrolthepoweroutput.Thisstrategymaintainsaconstantpoweroutputregardlessoftheener