電力變壓器狀態(tài)評估方法的研究.pdf

1、華北電力大學(xué)(北京)碩士學(xué)位論文電力變壓器狀態(tài)評估方法的研究姓名：諶軍申請學(xué)位級別：碩士專業(yè)：電氣工程；高電壓與絕緣技術(shù)指導(dǎo)教師：全玉生201103牛北電力大學(xué)碩十畢業(yè)論文AbstractPowertransformerisoneofthemostimportantandexpensiveequipmentinpowersystem，thestateofthetransformerisnotonlyrelatedtothesafeope

2、rationofitsown，butwillalsoaffectthepowersystemstabilityandreliabilityAsChina’Seconomicdevelopmentandpowercapacityincrease，powertransformerfailuremayleadtomoreseriousconsequencesTherefore，improvingthereliabilityofpowertra

3、nsformeroperationandmaintenancestandards，thesafeoperationoftheentirepowergridhasvelyimportantsignificanceFirstlythetransformerconditionassessmentathomeandabroadwasreviewed，amodelfortransforiflerassessmentbasedoncatastrop

4、hetheoryiSproposedbecauseofthedevelopmentofthephysicalprocessoftransformerandthemodelparametersisobtainedthroughalargenumberofdata，theattentionvalueofC2H2／C2H4isobtainedfromthismodelThethermalfaultoftransformsisoneofthep

5、rimaryfaultamodelforforecastingthethermalfaultbasedoncuspcatastropheisproposed，whichusestheexistingoron—linetransformerDGA(dissolvedgasanalysis)datatoassessthestateofthetransformerandprediction，andconfirmedthroughacasefe

6、asibilityofthemodelFinallytheinfluenceaboutlightningstroketooilpaperboardinsulation，especiallytothepowerfrequencybreakdownvoltage，flashovervoltageandDGAofoilpaperboardinsulation，isresearchedthroughtestBythedatafromthetes

7、t，theconclusionthatthepowerfrequencybreakdownvoltageandflashovervoltagedecreasedbecauseoflightningstrokeInconclusion，lightningstrokeCanresultindescendofoilpaperboardinsulationKeywords：powertransformerconditionassessment，