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0,,,,[1],[2]。,、、,,,。,,[3],[4]。/、、。[5]/,/。[6],。,,。、、,[7]。[8],,,。,,,,,。,/,,,。PSCAD/EMTDC,,。11。(b)1Fig.1Hybridanti-islandingschematic:2015-04-19。:(2014DFG72240);(2013BBE50102)。:(1978-),,,,,。E-mail:xiayh_98@163.com1,2,1,2,2,1(1.,330031;2.,330096):,,。/,,,。,,、。:;;/;:TM615:A:1671-5292(2015)07-0987-06RenewableEnergyResources33720157Vol.33No.7Jul.2015(a)S2CtrlPQPLQLUpccS1ACRLCS2PL+jQLS1PCCP+jQΔP+jΔQ·987·DOI:10.13941/j.cnki.21-1469/tk.2015.07.005S1,S2,PQ,PLQL,ΔPΔQ、;R,L,C。,,S1,S2,Upcc,,U,:PL=P-ΔP=U2pcc/R=U2/R(1)QL=Q-ΔQ=U2pcc(1/2πfL-2πfC)=U2(1/2πfL-2πfC)(2),S1,P′L=P=U2pcc′/R(3)Q′L=Q=Q2pcc′(1/2πf′L-2πf′C)(4):f,f′。(1),(3):U2pcc′-U2pcc=ΔPR(5)(2),(4):(f′-f)(1+4π2ff′LC)=ff′LΔQ/Q2pcc(6),,,4。①、,ΔP≠0,ΔQ=0,(5),(6):U2pcc′=U2pcc+ΔPR=U2+ΔPR(7)f′=f(8)(7),U′pcc。②、,ΔP=0,ΔQ≠0,(5),(6):U′pcc=Upcc=U(9)f′≠f(10)(10),U′pcc。③、,ΔP≠0,ΔQ≠0,(7),(10),U′pcc。④、,ΔP=0,ΔQ=0,(8),(9),U′pcc。,,,PCC,;,,U′pcc。,:,,,/,,。2PQ2。Pref,Qref,PQ,dq,,、[9]。2015,33(7)2Fig.2Hybridanti-islandingmodelDCPWMabc/dqicibiaUaUbUcP,QPL,QLCtrlUpccPWMSPWMdq/abcSPrefN/D32UsdididrefωLPIUsdUdiqQrefN/D32UsdiqiqrefPIωLidUqUsqUsdUsqidiq·988·,P,PLQ,QL,Ctrl。Ctrl0,S,;Ctrl1,S,。3。,,PPL,QQL,,ΔP、ΔQ,Ctrl1,S,。,①,②,③,,/,。,ΔP=0,ΔQ=0,,Ctrl0,S,,,2PrefΔP,ΔP′=Pref/3,UUmax 2-1≤P-PLP≤UUmin 2-1:0.4375≤PLP≤1.3056,,PLP,Pref/3。a,2,I′a=(Pref+ΔP′)/3Uacosφ=Ia+ΔIa(11):Ia,ΔIa。,(11),,,,。,Upcc。,,U′pcc=IaZL=(Ia+ΔIa)ZL(12)(12),,,,。3PSCAD/EMTDC,4。0.8kV,SPWM,,5kHz,30kW,0Var,PQ,0.38kV,50Hz,BRK1,BRK2,1s,80%~120%,49.5~50.5Hz。,3Fig.3HybridPVinverteranti-islandingstrategyflowchart(a)P,Q,PL,QLP-PL,Q-QLCtrlCtrl=0Ctrl=1,/,,BRK2g1g3g5g4g6g2R=0222222UsaUsbUsclalblcUsaUsbUsclalblc3[mH]3[mH]3[mH]30[uF]30[uF]30[uF]AVUpccUpccP+jQBRK1PinvQinvPQABCR=0fVrmsph/·989·a,、、5。、,,PQ,。3.1,P,PLQ,QL,Ctrl1,,/。Q=QL,1s,6。6,PPL,,1.05s0.8U,,,0.05s;PPL,,1.025s1.2U,,,0.025s,IEEEStd.2000-929[10]。PPL,Q≠QL,7。1s,Upcc;1.0198s50.5Hz,(a)PPL,Q=QL4Fig.4PVinverteranti-islandingsimulationmodel(b)(a)(b)5Fig.5Grid-connectedoutputBRK2g1g3g5g4g6g2UsaUsbUscIaIbIcUaABUsaUsbUscUbUcABABCtrl=1CtrlABVinv0.00.8165IdIqUsdUsqUdUqUaUbUcABCABCABCDQ0DQ0DQ0SBRK1Ctrl=0CtrlAB0.00.03PrefIdIdrefDN/DNDDDUsdPPUdDPFDFQ0.0QrefN/DDUsdUsd1.5*1.50.942DFIqIqrefPI*IdFDDFUsqUq0.942*TIMEBRK2UsaVaVbVcPLL0.400.200.00-0.20-0.40t/s0.9600.9801.0001.0201.0401.060/kV/kA0.400.200.00-0.20-0.400.0500.0300.010-0.010t/s0.000.501.001.502.000.0500.0300.010-0.010PQ(b)PPL,Q=QL6PPLPCCFig.6VoltageandoutputcurrentwaveformonpointofcommoncouplingwhenPandPLareoutofbalance0.400.200.00-0.20-0.40t/s0.9501.0001.0501.100/kV/kAUPCCIka0.400.200.00-0.20-0.400.400.200.00-0.20-0.40t/s0.9501.0001.0501.075/kV/kAUPCCIka0.400.200.00-0.20-0.40·990·2015,33(7)Q/MVarP/kW,0.0198s,IEEEStd.2000-929。3.2,P=PL,Q=QLP=PL,Q=QL,,Ctrl0,,,8。8(a),0.4s,ΔP′=Pref/3,0.04s;8(b),0.76s,,,,1s,,PCC,1.16s,,,,1.2s,U′pcc,,0.2s,IEEEStd.2000-929。4,,,。PSCAD/EMTDC,。:[1],,,.[J].,2011,39(6):147-154.[1]ChengQiming,WangYingfei,ChengYiman,etal.Overviewstudyonislandingdetectingmethodsfordis-tributedgenerationgrid-connectedsystem[J].PowerSystemProtectionandControl,2011,39(6):147-154.[2],.[J].,2009,42(3):71-74.[2]LvZhen,YangLi.Theislandingdetectionforphoto-voltaicgrid-connectedgenerationsystems[J].ElectricPower,2009,42(3):71-74.[3],,.[J].,2010,28(2):102-104.[3]YangXu,ZengChengbi,LiuMeifeng.ApplicationofcurrentfeedforwarddisturbancemethodonislandingdetectionofPVgrid-connectedsystem[J].RenewableEnergyResources,2010,28(2):102-104.[4]WovteA,BelmansR,NijsJ.Energyconversiontestingtheislandingprotectionfunctionofphotovoltaicinverters[J].IEEETransactionsonPowerElectronics,2003,18(3):157-162.[5]VerhoevenB.Probabilityofislandinginutilitynetworksduetogridconnectedphotovoltaicpowersystems[R].(b)7QQLFig.7OutputwhenQandQLareoutofbalance50.8050.4050.0049.4049.00t/s0.9400.9600.9801.0001.020/Hz(a)PCC0.400.200.00-0.20-0.400.9400.9801.0201.0601.080t/s/kV/kAUPCCIka0.400.200.00-0.20-0.40(a)(b)8P,PLQ,QLFig.8OutputwhenPbalanceswithPLandQbalanceswithQL0.03500.03000.02500.02000.01500.01000.0050t/s0.001.002.00/MW0.400.200.00-0.20-0.40t/s0.700.800.901.001.101.20UPCCIka0.400.200.00-0.20-0.40/kV/kA·991·,reportIEAPVPST5-07:2002,2002.[6]Kotsopoulos,DuarteJL,HendrixMAM.Islandingbe-haviorofgrid-connectedPVinvertersoperationunderdifferentcontrolschemes[A].IEEE33rdAnnualofPowerElectronicsSpecialistsConference[C].Caims:IEEE,2002.1506-1511.[7],,.[J].,2013,34(5):899-903.[7]LiYuqiang,ChaoQin,SongGuobing.MethodofsinglephasephotovoltaicGrid-connectedsystemislandingdetectionbasedonpowerdisturbance[J].SemiconductorOptoelectronics,2013,34(5):899-903.[8],,,.[J].,2014(4):37-39.[8]RenXiaopeng,LiYonggang,LiYabing,etal.Applica-tionofslid-modefrequencyshiftmethodinislandingdetectionofphotovoltaicgrid-connectedinverter[J].LowVoltageApparatus,2014,(4):37-39.[9],,.PSCAD/EMTDC[J].,2010,38(17):76-81.[9]YaoZhiqing,ZhangQian,LiuXimei.Researchonsim-ulationofathree-phasegrid-connectedphotovoltaicgenerationsystembasedonPSCAD/EMTDC[J].PowerSystemProtectionandControl,2010,38(17):76-81.[10]IEEERecommendedPracticeForUtilityInterfaceofPhotovoltaic(PV)Systems[S].Ahybridphotovoltaicinverteranti-islandingstrategyXiaYonghong1,2,Hu
本文标题:一种混合式光伏逆变器反孤岛策略
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