并联型有源电力滤波器设计及并网冲击电流的抑制

14320103ELECTRICMACHINESANDCONTROLVol.14No.3Mar.2010200240LCLd-q。DSPTMS320F28335DSPTMS320F2812CPU。50kVACPU。TU313A1007－449X201003－0039－06StudyonshuntactivepowerfilterdesignandsuppressionofimpulsecurrentduringconnectiontothegridZHANGLiangCAIXuZHANGDongWindPowerResearchCenterShanghaiJiaoTongUniversityShanghai200240ChinaAbstractAmathematicmodelind-qframeisestablishedforashuntactivepowerfilterofthreephasesandthreelineswithaLCLfilter.Apurelydigitalschemeforharmoniccurrentsabstractanditscompen-sationisdesignedbasedontheinstantaneousreactivepowertheory.TosuppresstheimpulsecurrentamethodofsoftlyconnectiontothegridispresentedwhichistocontrolDCvoltagebypiecewisefunctionandtoconnecttothegridinapropertime.Simultaneouslyadual-DSPcontrolsystemisdevelopedtocomputeforcontrolinarealtimewhichcontainsafloatingDSPTMS320F28335andafixedDSPTMS320F2812.TheexperimentresultsshowedthatthedualCPUdigitalsystemensuredareal－timecon-trolfortheharmoniccompensationandthesoftconnectiontogridsuppressedtheimpulsecurrent.Keywordsactivepowerfiltersharmonicsdetectioninstantaneousreactivepowertheorysoftgrid-con-nectionfloatprocessor2009－10－172008“”08DZ12005042008ZX080301982—1964—、1977—。0。1－3。activepowerfilterAPF。。、。LCL4－5LCLd-q、。50kVACPUCPUTIDSPTMS320F28335150MPWMCPUTIDSPTMS320F2812CPUCPLDRAM。。1LCLLCL1PWM、LCL3。非线性负载ILaILbILcIsaIsbIscUscUsbUsaV1V3V5CeV4V6V2LCL滤波器UhaUhbUhcLrLsIhcIhbIhaCsAPF主电路电网1LCLFig.1FunctionaldiagramofshuntactivepowerfilterwithLCLfilter1APFusa=uha+Ls+Lrdihadtusb=uhb+Ls+Lrdihbdtusc=uhc+Ls+Lrdihcdt。1usa、usb、uscuha、uhb、uhciha、ihb、ihcLs、Lr。PWMuha=KaUdcuhb=KbUdcuhc=KcUdc}。2UdcKa、Kb、Kc±13±23Ka+Kb+Kc=01。ΔihcKc0Δihc。。Cedudcdt=Kaiha+Kbihb+Kcihc。3udcCedudcdt=1udcuhaiha+uhbihb+uhbihc。41～4Ls+LrLs+LrLs+LrudcCeddtihaihbihcudc=000000000000uhauhbuhc0ihaihbihcudc+usa－uhausb－uhbusc－uhc0。5d、qd－qLs+LrLs+LrLs+LrudcCeddtidiqudc=04140ωsLs+Lr0－ωsLs+Lr00uhduhq0idiqudc+usd－uhdusq－uhq06ωs。6。22、FFT、。。2。usausbusc三相软件锁相环ilailbilcC32Cpqi琢i茁LPFLPF+idiqi軃qi軃dC-pqCT32i茁fi琢fiafibficf-+-+-+-sin（兹+驻兹）cos（兹+驻兹）PI+-驻UdcUdcUdcrefihaihbihcPIPIPI+-+-+i*hbi*hai*hca相调制b相调制c相调制2Fig.2Functionaldiagramofharmonicsabstractandcompensation2、、、、6。2.1d、q1－3。d、q62Δθ。d、qidiq。id、iqididi－diaf、ibf、icfi*ha、i*hb、i*hc。2.27－8。d-q9E→sdquq。E→sdquq。uqθ3。PI控制器+-u*q=0uqud2r2ssin兹cos兹正弦表积分兹u茁u琢usausbusc3s2s3Fig.3FunctionaldiagramofSPLL2.3。APF222APF。id。PWM。3APFAPFudc380Vudc700V。“”IGBT530V。143。530V。2PI。IGBTBoost700VPI。。aiha=udc+usaLs+Lr。7usa。PSIMaa90°、180°270°。43125A、0A、－125A。gt=usa+usb+usc8gt。PIhtht=000audcref－udc+udc0udc500Vudc700Vudc=700Vgt≠gtmin。udc=700Vgt=gtmin。9aPI。。2。1251007550350-35-500%%%%%%%%%%%%%%%%%%0.05%%%%%%%%%%%%%%%%%%0.1%t/sIsa%/A（a）a相90°时的并网冲击电流0%%%%%%%%%%%%%%%%%%0.05%%%%%%%%%%%%%%%%0.1%1251007550350-35-50Isa%/A（b）a相180°时的并网冲击电流t/s0%%%%%%%%%%%%%%%%%%0.05%%%%%%%%%%%%%%%%%%0.1%（c）a相270°时的并网冲击电流t/s250-50-100-150Isa%/A4Fig.4Burstcurrentcomparedfordifferentgrid-connectiontime4DSPCPLD、、、PI、PWM、、、。。CPU10。。CPU5。从DSPTM320F2812双口RAM主DSPTMS320F28335地址总线数据总线CPLD采样控制信号双口RAM控制信号采样结果AD1AD2三相电压、电流信号按键、显示RS232RS485CANBUSBUSBUS5DSP+CPLDFig.5Hardwaresystemdesignedforrealizationofalgorithms2414CPUTI150MDSPTMS320F28335CPUDSPTMS320F2812。CPURAM。AD。ADS83656。ADS386512、250kbit/s16。550kVA①CPU②③④。380V10A15kHz700VPIKP0.005KI10PIKP0.08KI0.8PIKP0.5KI5000。CPU15μsCPU50μs75A120A。6～9。620msaa。7aCPUCPLD、。8PIDA。9700V20V。锁相环锁定图a相同相电压Ua%_pl1a相电网电压Uat（10%ms/div）Ua%_pl1，Ua（2V/div）6Fig.6TheexperimentresultofSPLL电网电流Isa增波电流Ihat（10%ms/div）Isa，Iha（1A/div）7Fig.7Experimentresultforharmonicscurrentabstraction补偿电流Ic指令电流Ireft（10ms/div）Iref，Ic（1A/div）8PIFig.8CurrentreferenceforcompensationandoutputfeedbackforAPF直流电压Udc补偿后a小写相电网电流Isat（10ms/div）Isa（10A/div），Udc（100V/div）9Fig.9VoltageofDCsideandcurrentwaveformofgridsideaftercompensation3436LCLd-q。、。50kVA16ADCPUDSPTIDSPTMS320F28335DSPTIDSPTMS320F2812DSPRAMCPLD。50kVA。CPU。1.M.20051－16.2.··M.20071－10.3.M.20061－6.4TWININGEHOLMESDG.Gridcurrentregulationofathree-phasevoltagesourceinverterwithanLCLinputfilterJ.IEEETransactionsonPowerElectronics2003183888－895.5LEEKuijunPARKNamjuKIMRaeyoungetal.DesignofanLCLfilteremployingasymmetricgeometryanditscontrolingridconnectedinverterapplicationsC//2008IEEEPowerElectronicsSpecialistsConferenceJune15－192008RhodesGreece.2008963－966.6WANGYongLUZhengyuYAOWenxietal.Digitalharmonicacquisitionwithdelaytimecompensationbasedontheimprovedd-qtransformationC//2004IEEE35thAnnualPowerElectronicsSpecialistsConferenceJune20－252004AachenGermany.200443050－3053.7.J.2007312182－85.LIGenPANGHaoXUJianfeietal.LogiccircuitforharmonicanalysisbasedonenhancedPLLJ.AutomationofElectricPowerSystems2007312182－85.8.J.2008321049－52.PANGHaoWANGZanjiCHENJianye.ControlsystemdesignofshuntactiveDCfilterJ.AutomationofElectricPowerSys-tems2008321049－52.9KIMYunhyunKIMKwangseobKWONByungkietal.AfastandrobustPLLofMCFCPCSunderunbalancedgridvoltagesC//2008IEEEPowerElectronicsSpecialistsConferenceJune15－192008RhodesGreece.20084712－4716.10.TMS320C200DSPM.20031－12.檪檪檪檪檪檪檪檪檪檪檪檪