大功率多電平逆變器寄生參數(shù)對電路性能影響和抑制的分析與研究.pdf

1、浙江大學(xué)電氣學(xué)院碩士學(xué)位論文大功率多電平逆變器寄生參數(shù)對電路性能影響和抑制的分析與研究姓名：李锃申請學(xué)位級別：碩士專業(yè)：電力電子與電傳動指導(dǎo)教師：何湘寧鄧焰20080722浙江大學(xué)碩l二學(xué)位論文摘要AbstrctFromresearchtoengineeringapplications，thehigllpowerequipmentsofpowerelectronicsgainedbothsocialandeconomicbenefits

2、Butintheresearchofhi曲powermulti1evelinvertorseffectsofcircuitnonide：alitiesoncircuitreliabilityareimportant，especiallyinengineeringapplicationsThepowerlossesandthermalmanagement，parasiticparametersandcircuittransientproc

3、esses，multi—levelvoltagesbalancemethodsetchavebecomekeyproblemsofmulti—levelinvertorresearchandapplicationsThisthesis’SworksareallbasedonthisbackgroundThesystemtemperaturerisingandheatsinkingdesignaledeterminedmostlybypo

4、werlossesThisthesispresentstheworkingstatesofthree—levelinverterandpromotesamethodtocalculatethepowerlossesCalculationresultsofthepowerlossesofthe630kWthreelevelinvertorindicatethatwatercoolingwouldbeeffectiveandpractica

5、lTestrictthehighdi／dtanddu／dt，adiode—clampedthree—levelinvertertopologywithRCDsnubbersandthedesignrulesaleproposedAccordingtothesimulationsandcalculationsofthesnubbercircuit，theinfluenceofsnubnercircuitparametersupontumo

6、ffcharacterristicsoflGBTsarepresentedToconsiderthecircuitparasiticparameters，thecircuitstrayinductancehasseriousinfluenceupontheturno行characterristicsofIGBTs，includingturn—offvoltagespikesandtransienttimeEspeciallyinhigh

7、powerinverters，di／dtanddu／dtarehi曲inpowerdevices，thecomponentsoftheinverterwillbedamageedTheworkingstagesoftheIGBTtumofftransientprocesses，theequivalentcircuitsofbasicloopofthethree1evelinverterwithstrayinductance，andthe

8、influenceofstrayinductanceareproposedThesimulationaccuracyoftheturn—offvoltagespikeisprovedthroughcalculationwiththeequivalentcircuitIGBTvoltagesunbalanceoftheNPCthreelevelconverterisanalyzed，thentheadvancedcircuitmethod

9、stobalanceIGBTvolatgesareprovidedTheclampedresistormethodWasprovedtobeeffectiveTeducestrayinductanceandoptimizethetumoffcharacterristics，athree1evelBusbar謝thminimuminductanceispresentedAlotofsimulationsaredoneinthepropos