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1、ApplicationofCascadeH-BridgeInverterinSuper-CapacitorEnergyStorageSystem1,a1,b2,c1,d1,eGuoJuZhang,RongCai,LisaQi,YaoChen,RongRongYuand2,fJiupingPan1ABBCooperatedResearchCentre,China2ABBCooperatedResearchCentre,U.S.Aabcguoju.zhang@cn.abb.com,rong.cai@cn.abb.com,Lisa.qi@us.abb.
2、com,defCathy-yao.chen@cn.abb.com,rongrong.yun@cn.abb.com,Jiuping.pan@us.abb.com,Keywords:CascadeH-Bridge(CHB)Inverter,Super-capacitorenergystoragesystem(SESS),SESScircuittopologydesign,energybalancingcontrol.Abstract:ThispaperpresentsapplicationofaCHBinverterbasedSESS.CHBinve
3、rterischaracterizedbycascadeconnectionofmultiplesingle-phaseH-bridge(orfullbridge)invertercells.CHBinvertercanmakeSESSflexibleincircuitdesign,reducedvoltagesteps,andlowerEMI.Thispaperpresentscircuitarchitecturedesign,modelingofCHBinverterbasedSESS,andcontrolstrategyfocusingon
4、powerandenergybalancecontrolamongSubmodules(SMs).ThesimulationresultsverifythattheCHBinverterbasedSESShaveagoodperformanceinbothfastpowerexchangeandSMenergybalance.IntroductionSuper-capacitorhasadvantagesofhighenergyefficiency(95-98%),highpowerdensity(300-1700W/kg)andlongcycl
5、elife(longerthan1000000dutycycles).Therefore,itisverysuitablefortheapplicationwithrequirementofshortdurationandlargepower,e,g,renewableenergyfirming[1]andbrakeenergyregeneration[2].However,manysuper-capacitorcellshavetobeconnectedinseriestoformonehighvoltagefirstsincethevolta
6、geofonesuper-capacitorcellislow,usuallylessthan5V.Thereisanenergymanagementsystem(EMS)insideeachmoduletobalancethecellvoltageandmanagekeyparametersincludingcellvoltage,temperature,andcharge/dischargecurrenttoguaranteesafeoperation.However,outputvoltageofsuchmoduleisstillveryl
7、ow,suchasBMOD0063P125madebyMaxwell,theratedvoltageis125V.Themaximumseriesvoltageisonly1500Veventhoughseveralmodulesareconnectedinseries[3].Thus,super-capacitorismoresuitableforlowvoltageapplicationindistributionnetwork,microgridetc[4].CHBinverterisverysuitableformediumorhigh-
8、voltagedcpowertransmissionandotherapplicationssuchasrenewableenergyr
