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1、1ProtectionSchemesforClosedLoopDistributionNetworkwithDistributedGeneratorBinLi,Member,IEEE,XuanYu,andZhiqianBo,SeniorMember,IEEEendsoftheprotectedlinesectionforradialconnectedlineorAbstract--Thepaperproposestheprotectionschemesforclosedopen-loopsystems.Inthecase
2、ofopen-loopnetwork,theloopdistributionnetworkwithdistributedgenerators.Generally,healthyfeederscanbeservedinanotherroutebyclosingtheMostofdistributionnetworksareoperatedinradialoropenloopnormallyopentieswitchwithashortinterval.Radialoropenduetothesecurityandprote
3、ctionlimited.Withtherapidloopoperationhasbeenadoptedintheoperationofexpansionofmodernpowersystemsanddemandforhighqualitydistributionnetworkformanydecades.Withtherapidofpowersupply,theclosedloopoperationisadoptedgradually.Furthermore,withtheincreasingpenetrationof
4、distributedexpansionofmodernpowersystemsanddemandforhighgenerators,radialoperationisnotsuitforimprovingstabilityofqualityofpowersupply,closedloopoperationisbecomingasystemanddistributedgenerators.Thispaperinvestigatesthesubject,whichisappliedindistributednetworki
5、nrecentyears,protectionrequirementsofclosedloopnetwork,andthenespeciallyforthenetworkwithpresenceofdistributedanalyzesthecharacteristicsofconventionalprotectionschemesgenerators(DG)[1-3].Comparedwithopenloop,thetiewhichareappliedinclosedloopdistributionnetwork.Ta
6、kingswitchisclosednaturallyinclosedloopoperation,sothatintodistributedgeneratorsconsideration,thepaperproposespilotwireinstantaneousprotectionforclosedloopnetwork.faultononesectioncan’tcausepowerlossesindownstreamWhat’smore,non-communicationover-currentprotection
7、isalsofeeders.Besidesdecreasingpowerlosses,closedloopinvestigatedtobeappliedinclosedloopnetwork.Theproposedoperationcanalsokeepfeeders’voltagelevel,andhasmoreprotectionschemesareabletosignificantlyimprovethecapacityofloadrising[3].reliabilityandsecurityofclosedlo
8、opdistributionnetworkwithObviously,itisdesirabletorealizeprotectionforcloseddistributedgenerators.loopfeedersbyusingsimpleandfeasibleprotectionscheme.However,c
