檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪(上接第92页)CauseAnalysisandTreatmentof400VPowerDiskIncomingSwitchTripofUnit1inWujiangduPowerPlantHOUFunian,HEXi,LIUMaolin,LIURuilin(WujiangduPowerPlantofGuizhouWujiangHydropowerDevelopmentCo.,Ltd.,Zunyi,Guizhou,563104)Abstract:Afterthetripof400VpowerdiskincomingswitchofUnit1inWujiangduPowerPlant,theprofessionalsmadeacomprehensiveanalysisfromtheelectricalprimary,electricalsecondaryandmechanicalaspects.Throughanalysis,itisfoundthatthebasiccausesoftriparethesettingoftrippingunitvalueofincomingswitchandloadswitch,thesettingofthevalueofsoftstarterandthereliabilityofcheckvalveofoilpressuresystem.Theanalysismethodsandideasinthispapercanbeusedforreferenceintheanalysisandtreatmentofsimilarincidentsinotherpowerplants.Keywords:WujiangduPowerPlant;incomingswitch;trip;softstarter;checkvalve95