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110kVGIS设备直阻超标原因分析.docx

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110kVGIS设备直阻超标原因分析 Title:AnalysisoftheExcessiveDirectResistancein110kVGISEquipment Abstract: Thispaperaimstoanalyzethecausesofexcessivedirectresistancein110kVGIS(GasInsulatedSwitchgear)equipment.Theexcessivedirectresistancecanresultinvariousoperationalissuesandsafetyconcerns.Bythoroughlyexaminingthepotentialfactors,suchaspoorcontact,insulationdegradation,environmentalconditions,andmanufacturingdefects,thisstudyseekstoprovideinsightsintotheeffectivemitigationstrategiestoensurethereliableandefficientoperationof110kVGISequipment. 1.Introduction GasInsulatedSwitchgear(GIS)iswidelyusedintheelectricitytransmissionanddistributionsystemduetoitscompactsize,enhancedsafetyfeatures,andexcellentperformance.However,anydeviationsfromthenormaloperationalparameterscanimpactthefunctionalityandreliabilityoftheGISequipment.Excessivedirectresistanceisonesuchissuethatneedstobethoroughlyinvestigatedandremedied. 2.Overviewof110kVGISEquipment Thissectionprovidesabriefoverviewof110kVGISequipment,includingitscomponents,designprinciples,andoperationalcharacteristics.Understandingthebasicsof110kVGISequipmentisfundamentalforidentifyingthecausesofexcessivedirectresistance. 3.CausesofExcessiveDirectResistance 3.1PoorContact PoorcontactbetweentheconductivepartswithintheGISequipmentcanleadtoincreasedelectricalresistance.Factorssuchasoxidation,dustaccumulation,andimproperinstallationcanresultinpoorcontact,leadingtohigherresistancevalues. 3.2InsulationDegradation Insulationdegradationcancontributetohigherdirectresistance.Factorssuchasaging,humidity,excessiveheat,andvoltagestresscandegradetheinsulatingmaterials,causinganincreaseinresistancevalues.Thissectionwilldelveintothevariousmechanismsofinsulationdegradationandtheirimpactondirectresistance. 3.3EnvironmentalConditions Environmentalconditions,suchashighhumidity,temperaturefluctuations,andpollution,canalsoaffectthedirectresistanceof110kVGISequipment.ThissectiondiscussesthecorrelationbetweenenvironmentalfactorsandtheexcessivedirectresistanceinGIS. 3.4