大型電力變壓器繞組短路強度計算與分析.pdf

1、沈陽工業(yè)大學(xué)碩士學(xué)位論文大型電力變壓器繞組短路強度計算與分析姓名：劉爽申請學(xué)位級別：碩士專業(yè)：電機與電器指導(dǎo)教師：李巖20070315大型電力變壓器繞組短路強度計算與分析CalculationandAnalysisontheWindingsShortCircuitStrengthinLargePowerTransformersAbstractAftersummarizingrelevantliteratures，2Dtransienta

2、xisymmetricelectromagneticfieldinlargetransformersandwindingshortcircuitstrengtharestudieddeeplyinthethesisAfewachievementswithvaluesontheoryandengineeringhavebeengainedandasoftwarepackagepracticalinengineeringisdevelope

3、dReferentialrulesareprovidedtoimproveabilitiesfortransformerwindingstowithstandshortcircuitn埒significanceandpurposeofthecalculationofshortcircuitstrengthofthelargepowertransformersareintroducedinthebeginningofthethesis，a

4、ndthenthedevelopmentoftheleakagemagneticfieldofthetransformer，thewindingshortcircuitstrength，thestabilityproblemoftransformerarediscussedInthepartofthecalculationoftheleakagemagneticfield，numericalcalculationaresetupbase

5、donthetheoryoffiniteelementmethod，andconsideringthesaturationofthesiliconsheetandthesteelconstruetionthenonsinevariefiesofthecurrent2Dtransientaxisymmetricelectromagneticfieldinlargetransformersundershortcircuitiscalcula

6、tedthedistributionofelectromagneticfieldisobtainedInthepartofelectromagneticforce，radialforceandaxialforcearecalculatedbyLorentzInthetransitionprocessofshortcircuit，shortcircuitcurrentandleakagemagneticfieldarealltochang

7、econtinuouslyTherefore，theshortcircuitforcewhichisgeneratedbytheinteractivityoftheshortcircuitcurrentandleakagemagneticfieldaredynamicforceactuallyThecalculationofthedynamicforceconsiderssomefactorsinthethesis。suchasthem

8、echanicalpropertyofvariousinsulationmaterial，inertiaforce，elasticforceandthefrictionforcewhichiSactingonthedisplacementofthestructuresCombinedwiththenumericalcalculationmethod，thediskunitdisplacementundertheaxialimpulsiv

9、eforceiscalculatedInthepartofthecalculationofthewindingshortcircuitstrength，theradialbucklingdependsonalotofthecomplexelement，suchasthestructureformofthewindings，thenumberofthebracingstructure，theaxialvibration，fabricati