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水分及老化对变压器油电导及击穿特性影响.docx

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水分及老化对变压器油电导及击穿特性影响 Title:InfluenceofMoistureandAgingonTransformerOilElectricalConductivityandBreakdownCharacteristics Introduction: Transformeroilplaysacriticalroleinensuringtheefficientandreliableoperationofpowertransformers.Itactsasbothanelectricalinsulatorandaheattransfermedium.However,withtime,transformeroilcanbeexposedtovariousfactorsthatcanimpactitselectricalandmechanicalproperties.Thispaperaimstoexploretheinfluenceofmoisturecontentandagingontheelectricalconductivityandbreakdowncharacteristicsoftransformeroil. EffectsofMoistureonTransformerOil: Moistureisacommoncontaminantintransformeroil.Itcanentertheoilthroughleaksorinadequatemaintenancepractices.Thepresenceofmoisturecanleadtoasignificantreductionintheelectricalconductivityoftransformeroil.Whenwaterismixedwithoil,itformsconductingpathsthatfacilitatetheflowofelectricalcurrent.Thiscanresultintheformationoflocalizedhotspotswithinthetransformer,leadingtoacceleratedagingandpotentialbreakdown.Hence,itiscrucialtocloselymonitorandcontrolthemoisturecontentintransformeroiltomaintainitsdielectricstrengthandoperationalreliability. ImpactofMoistureonElectricalConductivity: Theelectricalconductivityoftransformeroilisacriticalparameterthatreflectsitsabilitytoresistelectricalcurrentflow.Thepresenceofmoistureincreasestheconductivityoftheoilduetotheionizationofwatermolecules.Moisturecanalsocausechemicalreactionsthatgenerateacidiccompounds,furtherenhancingtheoil'selectricalconductance.Thisincreasedconductivityresultsinhigherenergylosses,reducedinsulationperformance,andincreasedriskofelectricalbreakdown. AgeingEffectsonTransformerOil: Transformeroilundergoesnaturalagingprocessesovertime,eventuallyleadingtoadegradationofitselectricalproperties.Agingcanbeacceleratedbyvariousexternalfactorssuchashightemperatures,oxidation,contaminants,andelectricalstress.Astransformeroilages,itundergoeschangesinitschemicalcomposition,viscosity,andresistivity.Thesechangescanpotentiallyaltertheelectricalconductivityandbreakdowncharacteristicsoftheo