三电平半桥逆变器研究

南京航空航天大学硕士学位论文三电平半桥逆变器研究姓名：徐中华申请学位级别：硕士专业：电力电子与电力传动指导教师：邢岩20080201iTL-HBTL-HBTL-HB1600VATL-HBiiABSTRACTInthisthesis,thetopologiesandworkingprinciplesofThree-LevelHalf-Bridge(TL-HB)invertersareintroduced.Thestabilityandtheprinciplesofloopdesignofvoltage-currentdual-loopcontrolstrategyarestudied.Thestabilityandastringencyoferrorsignalsofrepetitivecontrolarestrudied,andtheprinciplesofparametersdesignarepresented.Accordingtotheanalysesofvoltage-currentdual-loopcontrolandrepetitivecontrol,ahybridcontrolstrategybasedonvoltage-currentdual-loopcontrolandrepetitivecontrolisproposed,whichwillefficientlyimprovesthestaticprecisionandovercometherepetitivedistortion.Thereasonswhytheneutralpointvoltageturnstobeunbalancedareanlysisedindetail.Variousstrategiesforbalancingtheneutralpointvoltageareinvestigated,andanewstrategyisproposedtobalancetheneutralpointvoltageinthisthesis.Finally,a600VAprototypebasedonDSPisbuildandthedesignmethodsofhardwarecircuitandsoftwareprogramarepresented.Theexperimentalresultsbasedonthisprototypeareprovidedbywhichthevalidityandfeasibilityoftheproposedcontrolschemeareverified.Keywords:powerconverter,inverter,repetitivecontrol,hybridcontrol,neutralpointvoltagebalancingcontrolv1.1........................................................................21.2........................................................................21.3........................................................31.4.............................................................31.5.....................................................................42.1TL-HB...................................82.2............................................................................92.3..............................102.4TL-HBSPWM.........................................................102.5G0(s)...............................................................................122.6G0(s)...............................................................................122.7..................................................................................132.8..........................................142.9......................................................................152.10TL-HBbode...........................................152.11TL-HB..................................................162.12.............................................183.1......................................................................193.2..................................................................................213.3PP-1bode................................................................................233.4..............................................................................253.5...............................................................................263.6..........................................................273.7THD.....................................................273.8......................................................273.9THD.................................................274.1TL-HB..........................................................................294.2iLθ..............................31vi4.3TL-HB.........................334.4TL-HB.................344.5TL-HB.....................354.6θ..............................................................364.7..........................................374.8..............................................385.1TL-HB......................................................................395.2..............................................................................415.3TL-HB.................................................445.4TL-HB.....................................................485.5PI.........................................................495.6......................................................................495.7..............................................502.1..............................................................172.2..............................183.1..................................................................275.1(V)..455.2(V)..48vii1THDTotalHarmonicDistortionSPWMSinusoidalPulseWidthModulationDSPDigitalSignalProcessorTL-HBThree-LevelHalf-BridgeEMIElectroMagneticInterference2S1~S818D1D212ZQC1C2LoCoZoRorCrLrs1-rs4S1~S4TranVinVoVo.dcVdcviiiVCVC1VC2C1C2VC10VC20C1C2VC1maxVC2maxC1C2∆VCC1C2CV∆∆VCViVrefVref_peakVtriAVtriBABVtri_peakVdrive1~4S1-S4VrepVofVseVdVCSVC1SVC2SirefiLiLdcILiLfioimiC1iC2C1C2iLsLI&CI&oI&ixKvofKiLKvpKviKipKmSPWMKdKlmimiLG0(s)VoVinGh(s)Gv(z)E(z)Vref(z)Gd(z)D(z)Vref(z)Φ(z)zjzjNTsffofoωωnθzCrLrCdv/dtflpPFCFS()P,()11.1PowerElectronics)[1]2050SCRGTRGTOMOSFETIGBTIGCT2090IPMTOPSWITCHSiC21[2-5]BUCKFLYBACKZVSZCSPWMPSPICEPSIMSABERSIM[6-9][10-14]21.21.2.11.1S1S2C1C2AB1C2CinV−+1S2SAB1.11.2.21.2S1S2S3S4ABinV−+1S2S3S4SAB1.21.2.3A.Nabae1980IAS1983Bhagwatn[15]31.2.3.11.3C1C2D1D2S1~S4inV−+1C2C1S2S3S4SAB1D2D1.31.2.3.21.4S1~S4C1C2CflyinV−+1C2C1S2S3S4SABflyC1.41.2.3.31.58S1~S84inV−+1S2S3S4S5S6S7S8SABVABinV−+1.51/(n-1)(n)(THD)dv/dtEMI1.31.3.1[16-19]51.3.21.3.2.1PIDPI