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用于高压直流输电的晶闸管换流阀短路故障分析及其试验方法研究.docx

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用于高压直流输电的晶闸管换流阀短路故障分析及其试验方法研究 Title:ShortCircuitFaultAnalysisandExperimentalMethodforThyristor-basedHVDCConverterValveUsedinHighVoltageDirectCurrentTransmission Abstract: Withtheincreasingdemandforefficientandlong-distancepowertransmission,highvoltagedirectcurrent(HVDC)transmissionhasgainedsignificantattentioninrecentyears.Thethyristor-basedHVDCconvertervalveplaysacrucialroleinconvertingACpowertoDCpowerforefficienttransmission.However,shortcircuitfaultsintheconvertervalvecanleadtosevereoperationaldisruptionsandmayevenresultinsystemfailure.Therefore,itisessentialtoaccuratelyanalyzeandstudyshortcircuitfaultsinthethyristor-basedHVDCconvertervalvetoensurethereliableoperationofHVDCsystems.Thispaperaimstoinvestigateshortcircuitfaultanalysisandproposesanexperimentalmethodforassessingtheperformanceoftheconvertervalveundershortcircuitconditions. 1.Introduction 1.1Background 1.2Objectives 1.3Scope 2.OverviewofThyristor-basedHVDCConverterValve 2.1PrincipleofOperation 2.2StructureandComponents 2.3ControlandProtectionSystem 3.ShortCircuitFaultAnalysis 3.1TypesofShortCircuitFaults 3.2ShortCircuitFaultMechanisms 3.3EffectsofShortCircuitFaultsintheConverterValve 3.4FaultDiagnosisTechniques 4.ExperimentalMethodforShortCircuitFaultAnalysis 4.1ExperimentalSetupandConfiguration 4.2TestProcedure 4.3DataCollectionandAnalysis 4.4ExperimentalResultsandDiscussion 5.FaultMitigationStrategies 5.1FaultDetectionandIsolation 5.2FaultClearance 5.3FaultRecovery 6.Conclusion Thispaperprovidesacomprehensiveanalysisofshortcircuitfaultsinthyristor-basedHVDCconvertervalvesusedinhighvoltagedirectcurrenttransmission.ThestudyhighlightstheimportanceofaccuratefaultanalysistoensurethereliableandsafeoperationofHVDCsystems.Additionally,anexperimentalmethodisproposedforassessingtheperformanceoftheconvertervalveundershortcircuitconditions,whichcanaidinimprovingtheoverallreliabilityandrobustnessofthesystem.Furtherresearchiswarrantedtoexploreadvancedfaultdiagnosistechniquesanddevelopmoreeffectivefaultmitigationstr