基于模型辨识的灵活接地有源配电系统故障选线算法

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引用格式：，等.基于模型辨识的灵活接地有源配电系统故障选线算法[J].现代电子技术，2025，48（10）：135-141.

中图分类号：TN957.52-34 文献标识码：A 文章编号：1004-373X（2025）10-0135-07

Abstract：Inalusion tothefault lineselectionproblemofflexiblegrounding distributionsystemwithdistributed generation，alineselectionalgorithmusing transientzero-sequencenetworkmodelidentification isproposed.Thetransientzero sequencenetworkcomposedoftheinitialenergystoragedischargeofteacsuppresioncoilafterthesmallneutralesistanceis put intooperation is established.Thechangeruleofthemain frequencyofthetransient processandthetimedomainmodelof thetransientcurrentofthesoundlineandthefaultylineareanalyzed.Thetransientmainfrequencycurrentofanysoundlineis linearlyexpressedbythefirstderivativeofthetransientzero-sequencevoltageanditsowncapacitancetotheground，thatis，the soundlineequivalentisequivalenttoacapacitancemodel.Incomparisonwiththesoundline，thelinearexpresionoftransient zero-sequencevoltageandtransitionresistanceareaddedtothefaultline.Basedonthelinecapacitance model，thetransient currentofeachlineiscalculatedbymeansofthetransientzero-sequencevoltageandthecapacitanceparametersofeachline. Theoreticallthecalulatedtransietcurentisonsistetwiththeacualmeasureduent，hichndicatesthatteactualline isacapacitance modelandisjudgedtobeasoundline.Otherwise，itisjudgedasafault line.Thefaultlineselectioncriterion isconstructedbasedonthediferencebetweenthetransientcalculationcurrentandthemeasuredcurrent.Matlabsimulation softwareisusedtoverifytheapplicabilityoftheshemeindiferent transitionresistance，faultlocationandotherfaultsituations. The simulation resultsverify the feasibility of theproposed method.

Keywords：flexiblegroundingsystem；active distributionsystem；single-phaseground fault;transient voltage；model identification; fault line selection

0 引言

分布式电源的接入使得配电网从传统无源网络转变成为有源网络，这对其单相接地故障的处理能力提出了更高要求。（剩余7054字）