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ID:33095979
大小:6.45 MB
页数:48页
时间:2019-02-20
《大电机主绝缘端部防晕结构优化与试验分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、哈尔滨理工大学工学硕士学位论文StructuralOptimizationinAnti-·coronaCoatingofGeneratorCoilInsulationSystemandExperimentalAbstractBecauseoftheelectricfieldconcentrating,therewillbecoronaevendischargehappenedprobablyonthenotchofgeneratorend—winding。rnlehappe血gofcoronaw
2、illreducethelongevityofmotorcoilandleadtotheoccurrenceofseriousincidents.Italsolimitstheenhancementofgeneratorpowercapacity.Asthedevelopmentofelectricpowersystemandtheincreas啦demandforhigherpowergeneratorcapacity,thedesignofanti-coronacoatingstructur
3、eandmaterialsforgeneratorend-windingstatorcoilbecomethemosteffectivemethodtosolvetheproblemofcoronahappenedongeneratorend-winding,enhancethegeneratorcapacityanddecreasethegenerator'ssize.ThemethodwhichdispersetheSiCparticleanddissolvetheepoxylacquers
4、eparatelyisusedtomixthenonlinearanti-coronapaintforgeneratorwith600meshSiCand1200meshSiC,andmakethehigh-voltageelectricalconductivitytesttothem.ThendiscusstheinfluenceofdifferentSiCparticlesizeanddifferentSiCcontentontheresistivityandnonlinearcoeffic
5、ientofnonlinearanti-corompaint.MixtheSiCnonlinearanti-coronapaintbyOMMT/epoxycompositewithOMMTcontentfor2wt%.-6wt%andmakeacomparisonforelectricpropertiestotheSiCnonlinearanti-coronapaintwithpureepoxy.ThengettheconclusionthattheadditionofOMMTinOMMT/ep
6、oxycompositecanimprovethenonlinearcoefficientofcoronapaintwithoutchangillgtheresistivityPs.Dothefinite-elementsimulationcalculationonthe3DmodeIoftwosectionnonlinearanti-coronastructureforgeneratorendwiningstatorcoilbythesoftwareofmulti-physicscouplin
7、gsimulation,CoMsOLMultiphysics,toobtainitsmaxinlumelectricfield,maximumsurfacelossdensityandtherelativevoltageoftheendofhigh哈尔滨理工大学工学硕士学位论文resistanceanti-coronacoatingtothecoil.Thentransfertheprocessoffinite-elementsimulationcalculationofgeneratorend
8、windinganti—corollaslructuretoM—filescriptbythesecondarydevelopmentfunctionofCOMSOLScriptfile.RewritetheprogramofthescriptfiletofunctionfileundertheMATLABinterfaceandmaketheoptimizingcalculationtofunctionfilebythevariablerangewiththeresultoftestingto
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