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1、上海交通大学工程硕士论文摘要RESEARCHTHEPARTIALDISCHARGEMEASUREMENTONSTATORCOILSOFLARGETURBINEGENERATORABSTRACTDuringtheoperationofturbinegenerators,partialdischarge(PD)onstatorcoilsisoneoftheagingfactors.Theresearchofpartialdischargemeasurementonthewindingsofrotatingmachinerystartedinthe1950s.Thestandardsofonlin
2、e-PDmeasurementhavebeenformulatedforwindingsofthelargeturbinegenerator.However,therearefewpapersabouthowtoassessPDsignificanceonstatorcoilsandwindingsofgenerator,especiallyunderoff-lineconditions.AccordingtoGB/T20833-2007forPDmeasurementandevaluationonstatorbarsofrotatingmachinery,thispaperdiscusse
3、sthePDmeasurementmethodsandrequirements.Comparingwithdifferenttypesofsamples,boththemaincharacteristicsofthedischargeandthelevelofPDhavebeenobtained.Inthemeanwhile,theregularityofPDcharacteristicshasbeenanalyzed.Finally,thispaperprovidesareviewofthenatureofPD,howitcanbemeasuredforstatorcoilsandwind
4、ings,andthedischargemodeandassessmentofgroundwallinsulation.Aftermeasuringmanyturbinegeneratorcoils,mostofthemcan’tmeettherequirementofGB/T20833,whichrequirebelow200pCunderphasevoltageand500pCunderlinevoltage.However,thesegeneratorshavebeenrunningmanyyears,whichmeanstherequirementfromGB/T20833doesn
5、’tapplytoturbinegeneratorcoils.Comparingthedifferentdischargemode,differenttypesandstructuresofthemaininsulationcanaffectthePD.Whenseveralcoilparallelconnected,thechangeofthePDsignaltransmissionmakestheprincipleofmeasurementchanged,whichworthyoffurtherstudylater.KEYWORDS：Turbinegenerator,largestocc
6、urringPDmagnitude,apparentcharge,partialdischargeinception/extinctionvoltage万方数据上海交通大学工程硕士论文目录目录第一章绪论......................................................................................................................-1-1.1背景........................................................................
7、..................................................-1-1.2本论文的任务.........................................................................................................-3-第二章绝缘检测方法...........................
