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SPWM550000Constant-VoltageConstant-FrequencyCVCFSPWMSPWMdqPISPWMTheConstantVoltageConstantFrequencyControlStrategyforThree-phaseSPWMInverterChenZhuo(CSGEHVPowerTransmissionCompanyGuiyangBureau,Guiyang550000)AbstractThispaperproposesanovelclosed-loopcontrolstrategybasedoncoordinatetransformationforthree-phaseConstant-VoltageConstant-FrequencyCVCFSinePulseWidthModulationSPWMinverters.Usingtheideaofcoordinatetransformation,thismethodtransformstheSPWMinverterfromathree-phasestationaryframetotwophasesynchronousrotatingcoordinatesystemtoestablishthemathematicalmodeloftheoutputsideoftheinverter,soastoregulated,qaxiscomponentsoftheoutputvoltagebyPIregulator,respectivelytogeneratemodulationsignalstorealizeconstantvoltageconstantfrequencycontrolofthethree-phaseinverter.Inthiscontrolscheme,thecontrolstructureisverysimpleandthecostislow.Thesimulationresultsverifytheschemehastheadvantagesoffastresponse,highlyaccuratesteadyoutputandsmallharmonicdistortionrateoftheoutputvoltageetc..Keywords:SPWMinverterConstant-VoltageConstant-Frequencymodulationcoordinatetransformationtotalharmonicdistortionrate1CVCFUPS[1-2]THD[3]SPWM3%THD5%[4-6]201012245SPWMd-qdqPI2SPWMSPWM1UdLCUaUbUciLaiLbiLcUoaUobUociaibic1SPWM1SaSbSc10aS=110bS=2c10S=3SaSbScoaadobbocc2111213112USUUSUS=41SPWMLkkokkLkkddddiLUUtUCiit==k=a,b,c5SPWMSPWMdq[7]LddodLqLqqoqLdodLddoqoqLqqodddddddddiLUULitiLUULitUCiiCUtUCiiCUt====654PI6322SPWM[]d3S/2Rabcmq23032TTUCUUUUU=7UmC3S/2R3S/2R22coscos()cos()3322sinsin()sin()33tttCttt+=+702d1q0,dqPIPIS1S4S1S4S3S6S3S6S5S2S5S2201012262S/3RmUdUqdq22PI4Matlab/Simulink170kWU0=220V2Ud=650V3fc=20kHz4L=1mHC=2.2F53~734a5a550.3%0.43%650V5V1kHz634a5675SPWMdqPI[1]LiJian,KangYong,Chenjian.ANovelRepetitivePDControlStrategyforSingle-phase400HzCVCFInverters[J].Pro-ceedingsofIndustrialElectronicsSociety,2002(1):544-549.3820101223[3],.UHF[J].,2005,24(3):384-386.[4],,.[J].,2003,36(6):620-623.[5],.[J].,2001,30(1)91-93.[6],.[J].,2003,30(4)565-568.[7],.[M]..:,1987:239-381.[8],,,.[J].,2010(2)40-42.1984-26[2]KeliangZhou,DanweiWang.DigitalRepetitiveLearningControllerforThree-phaseCVCFPWMInverter[J].IEEETrans.onIndustrialElectronics,2001,48(4):820-830.[3],(GuoWeinong,ChenJian).(Studyondigitalduay-loopcontrolforinvertersbasedonstate-observer)[J].(ProceedingsoftheCSEE),2002,22(9):64-68.[4]CaratiEG,RichterCM,GrundlingHAArobusthighperformancethree-phaseuninterruptiblepowersupply[A].ControlApplications,Proceedingsofthe2000IEEEInternationalConferenceon[C].2000:896-901.[5]ZhouKeliang,WangDanwei.Digitalrepetitivelearningcontrollerforthree-phaseCVCFPWMinverter[J].IndustrialElectronics,IEEETransactionson,2001,48(4):820-830.[6]MattavelliP.Synchronous-frameharmoniccontrolforhigh-perfor-manceACpowersupplies[J]IndustryApplications,IEEETransactionson,2001,37(3):864-872.[7],,,.SVPWM[J].,2003,3(75):30-32.1986-34[1],,.[J].,2002,22(4):127-130.[2],.[J].,2000,20(9):32-35.[3],,.[J].,1999,23(1):31-33.[4],,.[J].,2001,25(14).[5],,,.[J].,2000,24(15):42-44.[6],,,.[J].2007,33(5):135-138.1969-1973-2010128