基于Matlab-Simulink的三相光伏发电并网系统的仿真-蒋拯

PowerSystemandCleanEnergyVol.29No.10Oct.2013A730050SimulationofThree-PhasePhotovoltaicGrid-ConnectedSystemBasedonMatlab/SimulinkJIANGZhengCollegeofElectricalandInformationEngineeringLanzhouUniversityofTechnologyLanzhou730050GansuChinaABSTRACTThispaperestablishesageneralsimulationmodelofthePVarrayaccordingtoitsoutputvolt-amperecharacte-ristics.Basedonthisitproposesakindofadaptivedutycycledisturbanceobservationmethodandestablishesasimulationmodelwiththeboostcircuitasthecore.ThemaximumpowerpointtrackingisrealizedandtheutilizationefficiencyisimprovedofthePVarraysbycontrollingtheBoostDC-DCconverter.Forthethree-phasephotovoltaicgrid-connectedsystemresearchthispapermainlystartswiththePQcontrolprincipleandestablishesthesimulationmodelinthedqcoordinatesystemandthensimulatestheoperatingcharacte-risticsofthethree-phasephotovoltaicgrid-connectedsystemunderthePQcontrol.Thecorrectnessandvalidityofthesimulationmodelisverified.KEYWORDSphotovoltaicgenerationphotovoltaicarrayMPPTgrid-connectedoperationPQcontrolBoostBoostDC-DCMPPT。PQdqPQ。MPPTPQPhotovoltaicPV[1][2]。I-VP-V[3][4][5]。[6]Matlab/Simulink[7]PSCAD/EMTDC。Matlab/SimulinkBoostBoostDC-DCmaximumpowerpointtrackingMPPT。PQdqPQ。———————————————————50967001。ProjectSupportedbyNaturalScienceFoundationofChina50967001.2Fig.2SimulinkmodelofthePVarray11。1IL=Iph－IDexpqUoc+ILRsAKT－－－11Iph=Isc+KtT－298－－G10002ILIphIDUocIscRsK1.38×10-23J/KTAGq=1.6×10-19C。1、。、Isc。。NsNpIL=NpIph－NpIDexpqUoc+ILRsNsAKT－－－－－13P=UocIL4I-V、[8]。1~4Matlab/Simulink2。1Fig.1EquivalentcircuitofthePVmoduleVol.29No.102MPPT。[9-10]。。MPPT[11]。MPPT、、、。602.1DC-DCDC-DCBoost、Buck、Buck-BoostCuk[12]。DC-DCPWM。BoostMPPT3TcLLTcL。Boost、Vout=Vin1－D5Rin=VinIin=VoutIout1－D2=R1－D266RDBoostDBoost。DRinRinMPPT。BoostBoostD。2.2MPPTBoostVPWM。。。。V。2.3PWMPWMVrefPWMBoost。MPPT0.001～0.01PWM。MPPT4。33.1Boost、、LC[13-14]。PCC5。3.2PQPQ[15]。PQ。UUmuaubuc!#$%%%%%%%&=UmcosωtUmcosωt－2π3’(Umcosωt+2π3’)!#$%%%%%%%%%%%%%&7Umdq3BoostFig.3Boostcircuittopologydiagram614MPPTFig.4MPPTsimulinkmodelofthePVarrayuduq=Tabc→dquaubuc=um08uduq=0。abcdqdq。idqdqid、iq。iq=0PrefQrefiqref=－Qrefud9idref=Prefud10irefPidQiq。PQSPWMSPLLdq3SPLLdq、。3.3PLL。SPLL。6SPLLUabcαβdquduq。dqθ*uq0。uq0PIωω5Fig.5Three-phasePVgrid-connectedsystemstructureVol.29No.1062825℃1000W/m2。。910SPLLdq。SPLLSPLLdq1Tab.1SimulationsystemparameterPVTref=25℃，Sref=1000W/m2Voc=24.2V，Isc=4.8A，Im=4.5A，Vm=21.7V，Pm=94WBOOSTCs=100e-6F，L1=10e-3H，C=300e-6F，R=20ΩMPPT0.0001，ΔD=0.001PWMfs=2000HzLCr=0.1Ω，L=2e-3H，C=200e-6FThree-PhaseSource，ea=10000sin（100πt）Load200000W7Fig.7Thesimulinkmodelofthree-phasePVgrid-connectedsystemω0ω*θ*。PI。SPLL。dq。dqqq。。471。6SPLLFig.6SPLLblockdiagram63dqdq0。PQ。11。25℃600W/m20.1s800W/m211Fig.11Simulationresultsunderdifferentsolarirradiance10dqFig.10Simulationcurveofthree-phasevoltageafterdqtransformation9SPLLFig.9SPLLfrequencytrackingsimulationcurveVol.29No.108Fig.8Voltageandcurrentofthree-phasePVgrid-connectedsystem640.2s1000W/m2。。。11abc、。11dBoostBoostBoostMPPT。5MatlabBoostMPPT。PQdqPQPQ。[1].[J].2007272:75-79.WANGHai-ningSUJian-huiDINGMingetal.Photo-voltaicgridconnectedpowerconditionersystem[J].Proce-edingsoftheCSEE2007272:75-79inChinese.[2]RECHCPINHEIROHGRUNDLINGHAeta1.ComparisonofdigitalcontroltechniqueswithrepetitiveintegralactionforlowcostPWMinverters[J].IEEETrans-actionsonPowerElectronics2003181:401-410.[3]PARKMYUI.Anovelreal-timesimulationtechniqueofphotovoltaicgenerationsystemsusingRTDS[J].IEEETEnergyConver2004191:164-169.[4]ZHANGLAL-AMOUDIABAIY.Real-timemaximumpowerpointtrackingforgrid-connectedphotovoltaicsystems[C].PowerElectronicsandVariableSpeedDrives2000.[5]ARISTIKOURTESISEKONOMOULetal.Modelingofashingle-phasephotovoltaicinverter[J].SolEnergMatSolC200791:1713-1725.[6]TSAIHuan-liangTUCi-siangSUYi-jieeta1.Deve-lopmentofgeneralizedphotovoltaicmodelusingmatlab/simulink[C].ProceedingsoftheWorldCongressonEngin-eeringandComputerScience2008.[7].PSCADMPPT[J].20093719:6l-64.SUNZi-yongYUHangYANGan-guietal.PSCADsimulationmodelsforphotovoltaicarrayandMPPTcontroller[J].PowerSystemProtectionandControl20093719:61-64inChinese.[8].MPPTMatlab[J].2005175:1248-1251.MAOMei-qinYUShi-jieSUJian-hui.VersatilematlabsimulationmodelforphotovoltaicarraywithMPPTfunction[J].JournalofSystemSimulation2005175:1248-1251inChinese.[9].[J].2008346:1145-1154.ZHOULinWUJianLIQiu-hua.Surveyofmaximumpowerpointtrackingtechniquesforphotovoltaicarray[J].HighVoltageEngineering2008346:1145-1154inChinese.[10].MPPT[J].2012463:40-42.LAIDong-shengYANGPing.Variablestep-sizeincre-mentalconductanceusedinmaximumpowerpointtrackingcontrolofPVpowersystem[J].PowerElectronics2012463:40-42inChinese.[11].[J].20113519:101-107.LIANGShuangHUXue-haoZHANGDong-xiaeta1.Currentsatusanddevelopmenttrendoncapacitycreditofphotovoltaicgeneration[J].AutomationofElectricPower（73）65（65）Systems20113519:101-107inChinese.[12].DC/DC[J].2011459:66-68.GUOMing-mingSHENJin-fei.Reserchonsmall-scalephotovoltaicpowergenerationsoftswitchingDC/DCconverter[J].PowerElectronics2011459:66-68inChinese.[13].[J].201131126-31.ZHANGLiSUNKaiFENGLan-lan.Amodulargrid-connectedphotovoltaicgen