三電平PWM整流器控制策略研究.pdf

1、北京交通大學(xué)碩士學(xué)位論文三電平PWM整流器控制策略研究姓名：方鼎申請學(xué)位級別：碩士專業(yè)：電氣工程指導(dǎo)教師：童亦斌201106ABSTRACTABSTRACT：Multi—leVelPWMrectifierhasbeeIlwidelyusedinmiddle&hi曲VoltageaIldhi曲powerconVersionfieldforsomereasons，suchasitslittleVoltages仃essa行ordbypower

2、devices，10wharmoniccomponemsinirlplJtcurreIlt，ablityto姍at如11power_factora11dbidirectionalpowefnowAmongmaIlyofitsmodulationstrate百es，SpaceVectorPulseWidmModulationhasbeenoneofthemostpopularresearchpointsaboutmultileVelPWM

3、rectifi既ItsmainadVantagesareasfollows：hi曲erDCv01tageutilizationradio，1a培erundermodulation瑚lnge，si盟ificantnexibil時tooptimizeswitchingwaVefomsaIldwensuitableforimplementationonadi百talcomputeLThepaperwillstlldyonthethree—le

4、VelPWMrectifieraSfollowingpoints：(1)Wechoosediodeclampingt11ree—leVelinVenerasastudydbject，thIDu曲meintroductionofthreekindsofcircuitstop0109)，ofmulti1evelinVen甌We鋤alySjst11eworkprincipleofmecircuitandindicatetheadValltag

5、esof缸ee一1eVelNPCinVenercomparedwiththetwo—leVelinverter(2)WeanaIysistheSVPWMcon缸olmethodoft11reel“elrectifierindetailFirstlyitintroducesthebasicprincipleofspaceVoltageVectormodulation’rhenthrou曲detailanalysisandcalculati

6、on，thepapershowsthemethodofjud舀ngthe10cationoftheref宅rencevectoraIldthefon_11ulaofthebasicveCtors’actiontimeandtheactionorderBymiswaywecangettherealizationwayofSVPWMcontr01method(3)Fortheneutral_pointbalaJlceproblemofthr

7、eeleVelcl啪pingrectifier，weaIlalysisthecausesaIldproposakindofneutralpointcontr01methodbasicondistributionfactorT11roughsimulationweproVethecontr01method’sfeasibility(4)FortherequirementofLVRTbythePowerSystems，weanalysist

8、hepowerfallingontheimpactofwindconVenerandproposethepowerdissipatiVecrowbarcircuittealizeitThrou曲simulationweproVethecircuit’sfeasibility(5)111ismesissimulatesalgorithmproposedwithMATLABAtlast，Imakeaexperimentalplatfomfo