大电机主绝缘端部防晕结构优化与试验分析

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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