20051206-地铁直流牵引供电系统中的DDL保护

DDLa,,(,212013):,,,DDL,,,,:;;;:U321+.8:B:1003-8930(2007)01-0059-04DDLProtectioninSubwayDCTractionPowerSupplySystemWANGGuang-feng,SUNYu-kun,CHENKun-hua(SchoolofElectricalandInformationEngineering,JiangsuUniversity,Zhenjiang212013,China)Abstract:AfteranalyzingseveralkindsofprotectionforfeederlineinsubwayDCtractionpowersupplysystem,itispointedoutinthepaperthatthephenomenaofrefusingactionanderroractioncannotbeavoidedwithexistingprotectionwhichcannotprotectthewholefeederline.Basedonthecurrent-rising-rateprotectionandcurrentincrementprotection,theprincipleofDDLprotectionaswellasitsactionequationispresented.Thenearbyfaultcanbeclearedimmediatelywhilethedistantfaultcanbeclearedwithadelaybyusingtheproposedmethodwhichwillnotbeinfluencedbythestartingcurrentoftrains.Thefeasibilityandrationalityofthemethodareprovedbythesimulationresults.Keywords:subway;DCtractionpowersupplysystem;feederline;protection1,,,,,,DDL(didt$IT),(didt)($I),22.1Imax,1,Imaxtmax(tmax,),Id=kImax,(k),;,,,,Imax19120072ProceedingsoftheCSU-EPSAVol.19No.1Feb.2007a:2005-12-06;:2006-03-08:(BG2004024),1ImaxFig.1ProtectionprincipleofmaximumcurrentImax2.2$IImax,2,,t$I,$I,,,$I,2$IFig.2Protectionprincipleofcurrentincrement$I2.3didt3,,,,didt,$T,Adidt,B,didt,B,didt,didt,3didtFig.3Protectionprincipleofrate-of-current-risedidt2.4,,,4,C,,,AB,4Fig.4Protectionoftwowayinter-tripping,DDL(didt$IT),didt$I3DDLDDL(didt$IT)didt$I,didt$IDDL6020072,,T,3.1,,,$Ididt:(1)i=I(1-etS),I,S(2)(),,(3),(4)(5),3.2DDLDDL5,,didtE(),$IE$I(),;,FditdtE(F),,didt,T(DDL)$IF$I(),5DDLFig.5CharacteristicsofDDLprotection(),,DDL:(1)E;F(2)E$I;T,F$I(3)T,T3.3,:(1)ditdtE$I1E$I(1):E;E$I;ditdt;$I(2)EditdtF$I2F$ItT(2):Editdt(1);F,F$I;$I2T;T433kV,,L4km3km2km,6(6(a)(b)(c)T,$I,ditdt),,,61191:DDL,;(3km),,,,(a)T(b)$I(c)didt6DDLFig.6SimulationwaveformofDDLprotection,,DDL,5,DDL(didt$IT),,,,,,:[1]YitengErlang.TheprotectionmodeofDCsupplyc-ircuit[J].TheTechnologyofRailwayElectrification,Japan,1994,1(1):57-61.[2]ZhuPanfeng,LiYongli.Anadaptiveprotectionsch-emeinsubwayDCtractionsupplysystem[C]ProceedingsofInternationalConferenceonPowerSystemTechnology,2002,2(2):716-719.[3]SiemensAGTransportationSystemGroup.TractionpowersubstationDC-switchgersectionfeederprotectionprinciplefunction[Z].Germany,1998.[4]SiemensAGTransportationSystemGroup.Operati-nginstructionsofdigitalprotectivecontrollerSITRASDPU96[Z].Germany,1998.[5](YuSongwei).(Theanalysisandconsiderationabouthavingsupplysystemofcityrailwaytrafficengineeringmadeinourcountry)[J].(MetroandLightRail),1997,7(3):22-26.[6],,(WeiZhidong,ZhengYuping,HeHua).(Theanalyzingofdistantshort-circuitfaultcurrentinrapidtransitsystemsbasedonwavelettransform)[J].(ProceedingsoftheCSU-EPSA),2003,15(6):5-8.[7],,.[M].:,2002.:(1978-),,,Email:[e-mail](1958-),,,,Email:[e-mail](1981-),,,Email:[e-mail]6220072