含微网配电系统的保护问题的研究

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1、含微网配电系统的保护问题研究AbstractWitllthenationalemphasisonnewenergyresources．thedistributionsystemcontainingmicro-gridswithdistributedgenerationwillbethedistributionnetworkdevelopmenttrendinthefuture．Butwhenthedistributedgenerationaccessesthedistributionnetwork,whichwillimpactthedistributionnetworkstructure，i

2、mpactthefaultcurrentmagnitudeanddirectionofthe嘶d，andwillleadtOthetraditionalthree—stepcurrentprotectionCannotplaytheoriginalrole．Inordertosolvesomeproblemsofprotectiontechnologiesinthenewdistributionnetwork,inthispaperproposesadirectionalpilotprotectionprogrambasedcommunicationnetworktechnology．Inth

3、ispaper，ithasbuiltasimulatedmodelofthedistributionsystemcontainingmicro-gridswithdistributedgenerationbasedonMATLABsoftware，hasgotfaultdirectionalinformationfromthedirectionofcomponents．toverify也efeasibilityofthedirectionalpilotprotectioninthedistributionnetworkcontainingmicro一鲥dswithdistributedgene

4、ration．Whenthemicro-鲥dswithdistributedgenerationaccesstothedistributionsystem,whichmakesthedirectionofthetrendanddistributionchangedinthenetwork,andalsoaffectthesizeanddirectionoftheshort-circuitcurrent．TocreateasimplemodelinthesimulationsoftwareMATLAB，whenthemicro—gridswithdistributedgenerationacce

5、sstothedistributionsystem，whichimpactsonthetraditionalprotectionasfollows：resultinginfalseactionandrefuseactionofthislineprotection,reducingthesensitivityoftheprotection,lossoftheselectivityoftheprotection；leadingtofalseactionoftheadjacentlineprotection,lossoftheselectivityoftheprotection；expandingt

6、hescopeofpoweroutages．Becausethemicro-酣dswithdistributedgenermionaccesstothedistributionsystem，affectsthetraditionalprotection,inthispaperusesadirectionalpilotprotectionprogrambasedcommunicationnetworktechnology．Theprincipleoftheprotectionschemeis：theintelligentelectronicdevice(1ED)isprotectiondevic

7、e，whichdonotmakeanydecision,onlytOdetectthefaultdirectioninformation．TheIEDcollectsthefaultdirectioninformation，andtransmitthefaultdirectioninformationtotheSupervisoryControlandDataAcquisition(SCADA)s