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1、ANALYSISOFSURGECURRENTDUETOCLOSIINGLOOPINDISTRIBUTIONNETWORKFENGJing,ZHANGJianHua,LIURuoXi(DepartmentofElectricityandElectronicEngineeringAcademy,NorthChinaElectricPowerUniversity,Beijing,102206)ABSTRACT:LoopclosingoperationinPowerSystemOperationandControl.distributionnetworkwil
2、lbringsaboutKEYWORDS˖distributionnetwork;loopsteady-stateloopcurrentandthetransientpowerflow;surgecurrent;modeling;surgecurrentDŽRecentpapersmainlyanalyze1.IntroductionthetheoryandcalculationmethodoftheDistributionnetworkisclosedloopsteady-stateloopcurrent,butseldomdiscussconnect
3、ionmodedesigned,butopenloopthetransientsurgecurrent,onlyaroughoperated.Whenfaultindistritutionnetworkorevaluationpresented.Thispaperfullystudysmaintenanceneeded,loopclosingoperationisthemechanismofoccurrenceofthetransientadoppedtotransferloadfromonefeedertosurgecurrentandestabli
4、shsmathmaticalanotherinordertoavoidpowerinterruption.Inmodelforthecalculationofit.Thispaperalsoordertoimprovingpowersupplygivesthecalculationfomulasofthemaximumreliability,theoperationofclosingoropeningofthetransientsurgecurrentandtheloopswitchesisfrequently.Sothetheoryofitmaxim
5、umofeffectivevalueofthetransientshouldbestudiedfully.Loopclosingsurgecurrent.What’smore,theoccurringtimeoperationindistributionnetworkwillbringsofthemaximumofthetransientsurgeisaboutsteady-stateloopcurrentandthepresented.AnequivalentmodeloflocaltransientsurgecurrentDŽIfthevoltage
6、distributionnetworkisdevelopedtosimulatedifferencebetweenthetwoendsofthetielinetheclosingloopoperationusingistoohigh,thefeederswilloverload,soPSCAD/EMTDCprogram.Apreandpostcausingelectricpowerequipmentburn-out.closingcurrentcurveisrecordedRecentpapersmainlyanalizethetheoryandsim
7、ultaneously.Boththemaximumofthecalculationmethodofthesteady-statelooptransientsurgecurrentandthemaximumofcurrent,butseldomdiscussthetransientsurgeeffectivevalueofthetransientsurgecurrentcurrent,onlyaroughevaluationpresented.arereadoutfromthesimulationcurve.Thispaperfullystudysth
8、emechanismofMealwhile,themaximumofthetransiento
