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2006525233TelecomPowerTechnologiesMay25,2006,Vol.23No.3:2006201212:(:DREK200501):(1982-),,,,:100923664(2006)0320038204,,(,430074):(Anti2islanding),,:;;:TN712:AAnti2IslandingSchemesofGrid2ConnectedInvertersLUTing,DUANShan2xu,KANGYong(HuazhongUniversityofScience&Technology,Wuhan430074,China)Abstract:Anti2islandingissafetycriticalissueinDGsystemincludinggrid2connectedACinverters.Inthispaper,thebasictheoryofAIisanalyzed,andrecentdevelopmentsinAItechniquesisreview.Thetechniquesmaybeclassifiedasre2moteandlocal.Localtechniquesmayfurtherbeclassifiedaspassiveandactive.Furthermore,thecharacteristicofeverykindofAIschemesisalsobegiven.Keywords:grid2connectedinverters;anti2islandingdetection;non2detectionzone1,,,,,[1]:,(:),,11;,;,;;2(anti2islanding)[2]2:22:Pload=U2R(1)Qload=U2[(wL)-1-wC](2):PPDG=1-U2gidU2istand(3)QPDG=PloadQfPDGfislandfgid-fgidfisland(4)832006525233:TelecomPowerTechnologiesMay25,2006,Vol.23No.3Qf=RCL,Ugidfgid,Uislandfisland(3),(4),;,,(OVR)(UVR)(OFR)(UFR),,,,(5),(6),,,,(NondetectionZone),3UUmax2-1PPDGUUmin2-1(5)Qf1-ffmin2QPDGQf1-ffmax2(6)UmaxUmin/fmaxfmin/3(NDZ)(Umax=1.1V,Umin=0.8V,fmax=f0+0.5Hz,fmin=f0-0.7Hz,Qf=1.63)3,,3.1,,,[3,4]:(1):,(OVR)(UVR)(OFR)(UFR),,,(2):,,,(3):,,,(4):,,,,dPdtdfdt9f9P3.2,,,,:3.2.1/[5],,,,;,,,,,,,:(1)AFD(activefrequencydrift):tz,4f,v=sin(2)(f+f)(t-T1),T1,DGwtz2,RLC,/4AFDRLC,932006525233TelecomPowerTechnologiesMay25,2006,Vol.23No.3RLC,,RLC(7),OFR/UFR,NDZtan-1[R(wC-1/wL)]=wtz2=CF2(7),CF=tzTinverter(choppingfraction)CF,NDZ(2)AFDPF/SFS(ac2tivefrequencydriftwithpositivefeedback):AFD,AFDPF:CFk=CFk-1+F(wk)(8),CFk-1,wk,F(wk),CF,CF,,AFDPF,AFDPFF,(3)SMS(slip2modefrequencyshift):SMS,:v=sin(2f)(t-T1+k2)(k2=/360)(9):=msin[(f-fr)/2(fm-fr)](10),SMS55,,,50Hz,0,/,SMS/,/,AB,OFR/UFR,5SMS,:tan-1[R(wC-1/wL)]=-arg(G(jw))(11)w,(4)APS(automaticphaseshift):,APS:APS[k]=1f[k-1]-50Hz50Hz360+0[k](12):0[k]=0[k-1]+sgn(fss)(13)sgn(fss)=1fss00fss=0-1fss0(14),,0,,,,f,fss0,APSf,,,,UFR,3.2.2,RLC,(1),(2)://,6/,AI/(1)/(2),//AI,//,/,,7,,,,,6/042006525233:TelecomPowerTechnologiesMay25,2006,Vol.23No.373.2.3,,,,,(1)[1]:,,,;,,,,(2)[6]:,,,,,3.3,,PLCC(powerlinecarriercommunication)SDADA(SupervisoryControlandDataAcquisiton)[5],,[7],,,,,11a./b.c.d.3,;3,,;3,;33,3a./3,RLC;3;3,1,,33,b./3;3;3:,3,3abcdq,c.3,;3,3;3,;3;3,3dq3,a.b.3,,33,4,,,,,(52)142006525233TelecomPowerTechnologiesMay25,2006,Vol.23No.3;RSa133.1,,,PD,RJCRCaTJ(max),,1,RSa0.35;RSa0.22;3.2,TJTJ(max),Ta(max)PD(max)12,,4050,,Tx,Tx30TJ(max)=Ta(max)+(RJC+RCa//(RCs+RSa))PD(max)+Tx(2)3.33.13.2(2)RSa(max),RSa(2),RSa,,RSa85%95%RSa(max)4:(1),(2),TJ(max),,5,,:[1].[M].:,1989.[2].[M].:,2004.[3]D.S..[M].:,1989.[4]AbrahamI.Pressman,SwitchingPowerSupplyDesign[M].NewYork:McGraw-Hill,1999.(41):[1].[D].:.2003,78285.[2]ZhihongYe.Evaluationofanti2islandingschemesbasedonnondetectionzoneconcept[C].IEEETransonpowerelectronics.2004,19(5):117121176.[3]RM,Rifaat.Criticalconsiderationsforutilitycogenera2tioninter2tieprotectionschemeconfiguration[C].IEEETransonIndustryApplications.1995,31(5):9732977.[4]MorinaCS.InterconnectionprotectionofIPPgeneratorsatCommercialindustrialfacilities[C].IEEETransonln2dusrryApplications,2001,37(3):6812687.[5]JunYin.RecentDevelopmentsinIslandingDetectionforDistributedPowerGeneration[J].PowerEngineering,2004,(7):1242128.[6],.[J].,2005,24(3):22226.[7]KitamuraA.IslandingphenomenoneliminationstudyatRokkoTestCenter[C].IEEEPhotovoltaicSpecialistsConference,1994,1:7592762.25