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云广特高压直流输电线路雷电屏蔽性能研究.docx

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云广特高压直流输电线路雷电屏蔽性能研究 Abstract ThelightningshieldperformanceoftheYunGuangTehigh-voltagedirectcurrenttransmissionlinewasinvestigatedinthisstudy.Lightningstrikesposeasignificantthreattopowertransmissionlines,whichcancausesignificantdamagetopowersystemsandoftenresultinextendedpoweroutages.Theinsulationlevelandtheshieldingperformanceofhigh-voltagetransmissionlinesarecrucialtoensurereliablepowersupply. Thisstudyutilisedsimulationsoftwaretoinvestigatetheeffectsofvariousinsulationandshieldingmaterialsonthelightningshieldperformanceoftheline.Theresultsindicatethattheuseofappropriateinsulationandshieldmaterialscansignificantlyimprovethelightningshieldperformanceofthetransmissionline,therebyenhancingthereliabilityandsafetyofthepowersystem. Introduction High-voltagetransmissionlinesplayacrucialroleinthetransmissionanddistributionofelectricalpoweroverlongdistances.However,lightningstrikeshaveasignificantimpactonpowertransmissionlines,whichcancausedamagetothepowersystem.Theimpactoflightningstrikesonhigh-voltagetransmissionlinesdependsonseveralfactors,suchastheinsulationlevelandtheshieldingperformanceoftheline.Therefore,thedevelopmentofsuitableinsulationandshieldingtechniquesiscriticaltoensuringthesafetyandreliabilityofpowertransmissionsystems. TheYunGuangTehigh-voltagedirectcurrent(HVDC)transmissionlineisacrucialcomponentoftheChinesepowergrid,capableoftransmittinglargeamountsofpoweroverlongdistanceswithlowlossesandhighefficiency.However,lightningstrikesposesasignificantthreattopowertransmissionlines,anditiscrucialtoevaluatethelightningshieldingperformanceoftheline. Materialsandmethods SimulationsoftwarewasusedtoinvestigatetheeffectsofvariousinsulationandshieldingmaterialsonthelightningshieldperformanceoftheYunGuangTetransmissionline.Ahigh-altitude-inducedlightningmodelwasusedasaninputtothesimulationsoftwaretoevaluatethelightningshieldingperformanceofthetransmissionlineunderdifferentinsulationandshieldingconditions.Thelightningstrikecurrentdistributionandthevoltageandcurrentdistrib