计及配电网影响的微电网线路保护-研究

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1、太原理工大学硕：i==研究生学位论文————————————————————————————————————————一—————————————————————————————————————————————————————一RESEARCHONTRANSⅣ【ISSIC}NLINEPROTECTIONMETHODONCONSIDERINGDISTRIBUTIONNETⅥ70RKINFLUENCEABSTRECTIntherecentyears，me。asuringbothofenergyandgrid，distributedgenerationhas

2、beenburgeoning．Withtherisingpermeabilityofdistributedgenerationindistributionnetwork，distributedgenerationormicro—gridwillhavemoreandmoreinfluencesondistributionnetwork．Theintroductionofdistributedgenerationhaschangedthe：topologyofdistributionnetwork，whichisfromradialnetworkofs

3、inglesuppletomulti—suppleandmulti—lodenetwork．What’Smore，thiscausedthechangeSonshortcurrentsizeandpowerflowdirectionofthedistributionnetworksystem，evenbidirectionalflowappearsinSOmeline．Allofthechangesmakeabigchallengeforrelayprotectionsystemot’distributionnetwork．Meanwhile．ast

4、hemicro—gridisequippedwithlittlesh。ortcurrent，bidirectionalflowandvulnerableinfluencebynaturalconditions，traditionalrelayprotectioncan：tsatisfythedemandofselectivewithmicro—gridfurther．Therefore，therelayprotectionofmicro—gridhasgreatrealisticmeaningandprofoundsignificance．Inthi

5、spaper,theauthortakesthe：littlemicro—gridwhichisaccessedtodistributionnetworkastheresearch。object；givesadeepanalysisfortheinfluenceonrelayprotectionofdistributionnetworkwhichmicro—gridhasbeenIII太原理工大学硕士研究生学位论文——一———————————————————————————————————————一～～accessedto；determinesthe

6、settingvalueoftransmissionlineprotectionmethodinmicro。gridbasedonvoltagedisturbances；proposesanatresiastrategyusedinmicro·一gridandacommunication—basedunit—levelcurrentprotectionstrategyofdistributionnetworkandintroducesmicro—gridcontrolandprotectionsystem．Theanalysisofthespecif

7、iccontentasfollows：]i)Analysestheinfluenceonrelayprotectionstrstemofdistributionnetworkwhichmicro。gridhasbeenaccessedto，whichincludesmicro—gridbeingaccesseIdtodifferentpointsofdistributionnetworkduetotheinfluenceonrelayprotectiIonsystemofdistributionnetwork；theeffe·ctonthecapac

8、ityofdistributedgenerationfortheovercurrentprotectiono