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1、华中科技大学硕士学位论文工频耐压试验在XLPE电缆绝缘检测中的研究姓名：彭潜申请学位级别：硕士专业：高电压与绝缘技术指导教师：张国胜20050428AbstractWiththereformationandopeninginChina,people’slivinglevelisbecomingmoreandmorehigh,andthedesireforthegreenandthespaceismoreandmorestrong.Powerdeliverybyelectriccablecanoccupylesslandandbemoreconcealed,extend
2、thespaceinthecity,andmakethecitymorebeautiful.Intheotherhand,itissafetohumanbody,easytooperateandmaintain.Asaresult,theelectriccableismorepreferableandusedinnecessaryarea.Aftertheelectriccablewasconstructed,testonhigh-voltagewithstandcapacityisalwaysregardasoneoftheimportanttestsonwheth
3、erornotthecablecanoperatesafely,especiallytohigh-voltagecable,HighDCvoltageisthefirstchoiceinthepast,justforthattheequipmentislight,smallcapacity,easytoremove.ButsomedomesticresearchinstitutionsthinkthatintheDCvoltagewithstandingtestontheXLPEcable,becauseoftheeffectofthespacecharge,actu
4、alelectricfieldintensityintheinsulationcanbe11timesoftheworkelectricfield,theinsulationofXLPEcablecanbedestroyedbadlyevenithaspassedDCvoltagetest.Secondly,becausethedistributionofDCvoltagefiledintensityisnotequivalenttotheACtest,andDCtestcannottrulysimulatetheovervoltagethatthecablewith
5、standintheoperationandfindthelacunaofcableandthecabletie-inandtheproductmanufacturetechnique.Sothat,moreimportanceisattachedtotheXLPEcablevoltagewithstandtestusingnotDC.Becausethestatesofthepowerfrequencywithstandtestareclosetothecable’soperatingconditions,andthevoltageofthepowerfrequen
6、cywithstandtestislower,anditcanreflectthecable’sinsulationandfindtheflawsininsulationevenmoreastheextensionofthewithstandtimes.Thearticleintroducesthecable’stestcriteriaintheworld,andcomparesvariouswithstandvoltagetests,andindicatethelimitationoftheDCwithstandvoltagetest.Thearticleanaly
7、zestheprinciplethatthepowerfrequencywithstandvoltagetestcheckstheXLPEcable’sinsulationflaws,andafteralotoftests,discoverieschangerulesofshortingvoltagetovariousflaws,anddrawaconclusionthatitcandiscoverthewaterbranchflawunderthelowerpowerfrequencyvoltagerelativerules.Andtheautho
