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:2011-09-13:(1976-),,,,。1,、、,[1]。,。,,。,:①;②,;③。①②,③SVPWM[2],。,Parkd,q,。2、2.1、,,1。Sk:Sk=2,VSk1,VSk21,VSk2,VSk30,VSk3,VSk4!##$,k=a,b,c(1):VSk1~VSk4k4[3]。1,1,1,2(1.,230009;2.,430074):,。Parkd,q,d()q()。,。,,。:;;;:TM46:A:1000-100X(2012)03-0081-03InfluenceonActivePowerandReactivePowerfortheThree-levelNeutralPointImbalanceWANGFu-sheng1,ZHANGChang-xin1,WENJia-yan1,LIUJian-zhe2(1.HefeiUniversityofTechnology,Hefei230009,China)Abstract:BasedonoriginalspacevectorPWMneutral-pointpotentialanalysis,therelationshipamongtheneutralpointshift,fluctuationandtheactivepowerandreactivepowerofthreelevelconverterareanalysed.TheneutralpointofthecurrentexpressiontransformfromParktransformertothesynchronousrotationofthed,qcoordinatesys-tem,thentheinfectionofdaxis(activepower)andqaxis(reactivepower)ontheneutralpointpotentialsisanal-ysed.Firstly,theconclusionissimulatedfirstly,thenthevalidityofconclusionsisprovedbytheexperiment.Theex-perimentalresultsshowthattheactivepowermainlyaffectstheshiftoftheneutralpointpotentials,reactivepowermainlyaffectsthefluctuationsofneutralpointpotential.Keywords:converter;neutralpointvoltage;switchingvector;spacevector146320123Vol.46,No.3March2012PowerElectronics8146320123PowerElectronicsVol.46,No.3March2012PowerElectronics4US0+iNP221/110ic122/011ia212/101ib001100010S1aS1bS1c1(1),3,Udc/2,0,-Udc/2,27,2Udc/3,3姨·Udc/3,Udc/3,Udc。2a。,200,6A~E。6,A。2a。2b、UL,UM,US0US1,TL,TM,TS0TS1。,A[4],1。2.2,。、2。3、3.1Park,:iNP=TMMaMbMc姨姨iaibic姨姨T+TS000TS1姨姨S0aS0bS0cS1aS1bS1c姨姨iaibic姨姨T(2):TM;TS0TS1US0US1。(2)Park,d,d,q。Park:iNP=TMMdTMMq姨姨idiq姨姨+TS0S0dTS0S0qTS1S1dTS1S1q姨姨idiq姨姨(3):Md,Mq,S0d,S0q,S1d,S1qPark;TMMd,TMMq。3.2、、A3。A1UM,33a。3a,,。,,。(3),TS0S0dTS0S0qUS0+(100),US0+A4。A1A4US0,US0-(211)US0+。43b。3b,,,2A1ATaTbTcA12MTs2msinθTs(1-2M)TsA22(1-N)Ts(2M-1)Ts2msinθTsA3(1-2msinθ)Ts(1-2M)Ts(2N-1)TsA42(1-N)Ts(2msinθ-1)Ts2MTsM=msin(π/3-θ);N=msin(π/3+θ)。2、US0US1MaMbMc210010ib120100ia021001ic012010ib102100ia201001iciNP3UMA22msinθcos(θ-2π/3)2msinθsin(θ-2π/3)A3(2N-1)cos(θ-2π/3)(2N-1)sin(θ-2π/3)A42Mcos(θ-2π/3)2Msin(θ-2π/3)826390V,48V10A,20A,30A,40A,50A。,,。5LLC,MC33067,48V,2kWLLC。,LLC,ZVS,ZCS,,,。[1].LLC[J].,2009,26(2):6-9.[2],.LLC[J].,2009,26(1):1-5.[3].DC/DC[D].:,2004.[4]BoYang,RengangChen,FredCLee.IntegratedMagnet-icforLLCResonantConverter[A].IEEEAPEC[C].Dal-las,USA,2002,1:346-351.6。,,。4,,:,C1=C2=1600μF,L=1.5mH,Udc=400V,5kHz,50Hz。380V,380/190。4。4a,a5Aa2A,3.2。4b,7A2A,3.3。5,:,,,。,,。[1]LeeYH,SuhBS,HyunDS.ANovelPWMSchemeforaThree-levelVoltageSourceInverterwithGTOThyristors[J].IEEETrans.onInd.Applicat.,Mar./Apr.1996,32(2):260-268.[2],,.[J].,2007,22(10):91-96.[3],,.LCL[J].2010,44(11):36-38.[4],,.[J].,2007,26(11):80-83.31UM,Us0+、4、(80)!!!!!!!!!!!!!!!!!!!!!!!83
本文标题:有功无功对三电平中点不平衡的影响
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