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ElectricPowerAutomationEquipmentVol.32No.6Jun.2012326201260,。(PV),PV;(DC/DC)PV,。,PV,PV,PV(MPPT)[1-8]。MPPTPV、,,,。PV[1,3,9-11]。[1]MPPT,PV,MPPT。[3]PV(DC/AC)PV,2MPPTPV,,。[5-7]PV,。[9-11]PVMPPT,PV、。[12-13],DC/DC、PV,PVMPPT,PV,,,。1PVPV1,PV。PVDC/DC,(AC/DC);、。、、。,,,、、,。、DC/AC2,[12]、。2PVMPPT2.1PVDC/DCPVDC/DCBoostBuck:2011-08-19;:2012-03-23:(210GGX10706)ProjectsupportedbytheKeyScienceandTechnologyProjectofShandongProvince(210GGX10706)1,2,3,3,3(1.,100031;2.,443002;3.,250061):,,,;,,,。MATLAB。:;;;;;:TM615;TM761:A:1006-6047(2012)06-0090-04PV…DC/DCDC/DCAC/DCAC/DCDC/DCDC/DCDC/ACDC/ACAC/DC/ACAC/DCKPCC1PV、Fig.1AC/DCmicrogridmainlybasedonPVgenerationPV。BoostPV,DC/AC;BuckPV,,。1PVDC/AC,PV,PVBoost。Boost,DC/DC。BoostPV,,2[14]。BoostC1、C2(RC1、RC2),PVupv,ubus,upv、ubusd[14]:upv=d′ubus+d′uF+(RL+d′RF+dRon)IL(1),IL;RL;uFRF;RonS;d′=1-d。,RL、RF、Ron,PV,ILubus,(1)。uF,。ubus。,(1):upv≈cd′(2),cubusuF,。,PVBoostupvd(d′)。2.2MPPTMPPTPVupvipv,MPPT,iL,PI(PWM)S,PV,PV,2。MPPTipv,dipvMPPT,PV。PVP-U3,PV()M,;M,,,M。P-UK:Kn+1=△Ppv(n+1)△upv(n+1)=△(upv(n+1)ipv(n+1))upv(n+1)-upv(n)=upv(n+1)△ipv(n+1)+ipv(n+1)△upv(n+1)△upv(n+1)(3)(2)(3),,△d(△d0),:Kn+1=(1-dn+1)(ipv(n+1)-ipv(n))-ipv(n+1)△d-△d:Kn+1=αn+1-△d(4)PVMPPT。1t1,d1,PVipv1。2d2=d1+△d,t2ipv2。3(4)α2,:a.α20,K2,t2PVM(B),,,d3=d2+△d;b.α20,K2,t2PVM(A),,,d3=d2-△d;c.α2=0,K2=0,t2PVM,d2。,K,,K,P-U,MK,,,αnKn,,c:αn≤ε(αn、Kn,ε),,dn。PVipv,2BoostMPPTFig.2TopologyofBoostconverterwithparasiticparametersandtraditionalMPPTPVipvRLLcRFiDiLRC2C1paRonisSPWMRC1C2uFubusupvMPPTupvipvipvrefPI+--+50001002003004001248Ppv/kWupv/VPmaxMAB3PVP-UFig.3P-UcurveofPV,:6d1、△d、δ、εipv(n)ipv(n)-ipvmax<δ?ipv(n+1)△ipv(n+1)=ipv(n+1)-ipv(n)αn+1=f(ipv(n+1),△ipv(n+1),△d,dn+1)Kn+1=-αn+1/△ddn+2=dn+1+sgn(αn+1)△dn=n+1dn+2=dn+1,PV,ipvmax=ipv(n+1)αn+1≤ε?YNNY4MPPTFig.4FlowchartofMPPTcontrolalgorithm,ipvipvmaxδ,MPPT,。4。3MATLABPV[15],1,PVMPPT。:C1、C2RC1、RC2470μF、470μF,5mΩ、5mΩ;L0.2mH,100mΩ;uF0.5V,Ron10mΩ;640V,20kHz,10-6s。Boostd10.65,0.1s(d1),△d0.01,20ms,δ0.5A,ε0.05(αn≤ε)。,ubus、PVipv、upv5。ubus:dipv、upv,,。6PVipv,MPPT。PV,0.3s,12kW;0.545sS1kW/m20.8kW/m2,0.705s,Sipv,MPPT,PV,,ubus,,,。、PVChroma、DSPIPM、、,IPM360V,ChromaPVP-U7。,Boostd0.15,△d0.02,100ms,αn≤0.01,MPPT,7,ubus、PVipvPpv8。6、PVMPPTFig.6Waveformsofinputdutycycle,PVcurrentandMPPT0.201.00.40.60.8861012t/sPpv/kW29ipv/A39340.45d0.650.55800204060290260270280upv/Vt/ms37.92ipv/A37.8037.86642ubus/V638640d0.560.590.570.585ubus,dipv、upvFig.5PVvoltageupvandcurrentipvvs.dutycycledunderstableDCbusvoltageubus3000200300100900600P/WU/V7PVFig.7ParametersofprogrammableDCpowersupply324PVDC/DCPV,P-U,PV,K、PV。,PVMPPT,,。PV,PV,,,,PV。:[1]MIKIHIKOM,TATSUYAK,XUDehong.Asimplemaximumphotovoltaicpowertrackingtechniqueutilizingsysteminherentlimitcyclephenomena[C]∥38thIASAnnualMeetingofIndustryApplicationsConference.SaltLakeCity,USA:[s.n.],2003:2041-2047.[2],.[J].,2006,25(1):63-67.YANGHaizhu,JINXinmin.ResearchonimprovedmeasureofMPPTcontrolanditsexperimentinagrid-connectedphotovoltaicsystem[J].AdvancedTechnologyofElectricalEngineeringandEnergy,2006,25(1):63-67.[3]KWONJungmin,NAMKwanghee,KWONBonghwan.Photovoltaicpowerconditioningsystemwithlineconnection[J].IEEETransactionsonIndustrialElectronics,2006,53(4):1048-1054.[4],,,.[J].,2008,34(6):1145-1154.ZHOULin,WUJian,LIQiuhua,etal.Surveyofmaximumpowerpointtrackingtechniquesforphotovoltaicarray[J].HighVoltageEngineering,2008,34(6):1145-1154.[5]WANGZitao,CHANGLiuchen,MAOMeiqin.DCvoltagesensorlesscontrolstrategyforthree-phasegrid-connectedinverter[C]∥IEEEPowerElectronicsSpecialistsConference,PESC2008.Rhodes,Greece:IEEE,2008:323-329.[6]GAOFeng,LIDing,POHChiangloh,etal.IndirectDC-linkvoltagecontroloftwo-stagesingle-phasePVinverter[C]∥IEEEEnergyConversionCongressandExposition,ECCE2009.SanJose,USA:IEEE,2009:1166-1172.[7],,,.[J].,2010,34(23):82-86.YUANJianhua,GAOHoulei,GAOFeng,etal.AnindirectDC-linkvoltagecontrolstrategyfortwo-stagethree-phasegrid-connectedinverter[J].AutomationofElectricPowerSystems,2010,34(23):82-86.[8],,.MPPT[J].,2009,43(10):47-49.ZHANGChao,HEXiangning,ZHAODean.ResearchonvariableperturbstepMPPTcontrolofphotovoltaicsystem[J].PowerElectronics,2009,43(10):47-49.[9],,,.[J].,2008,28(7):21-25.LIQiuhua,ZHOULin,LIUQiang,etal.SimulativeresearchofMPPTforphotovoltaicpowersystem[J].ElectricPowerAuto-mationEquipment,2008,28(7):21-25.[10],,,./PIDMPPT[J].,2008,28(10):92-95.QIAOXinghong,WUBijun,DENGZangao,etal.MPPTofphotovoltaicgenerationsystemusingfuzzy/PIDcontrol[J].ElectricPowerAutomationEquipment,2008,28(10):92-95.[11],,.MPPT[J].,2010,30(12):92-96.JIAOYang,SONGQiang,LIUWenhua.Controlstrategyofgrid-connectedphotovoltaicgenerationsystembasedonmodifiedMPPTmethod[J].ElectricPowerAutomationEquip-ment,2010,30(12):92-96.[12]LIUXiong,WANGPeng,POHChiangloh.AhybridAC/DCmicro-grid[C]∥InternationalPower&EnergyConference,IPEC2010.Singapore:[s.n.],2010:746-751.[13]XULie,CHENDong.ControlandoperationofaDCmicrogridwithvariablegenerationandenergystorage[J].IEEETransonPowerDelivery,2011,26(4):2513-2522.[14].DC-DC[D].:,2004.OUYANGChanglian.Analysis&studyonmodelingofDC-DCswitchingconverter[D].Nanjing:NanjingUniversityofAero-nauticsandA
本文标题:直流微电网光伏发电最大功率点追踪方法-钱霞
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