基于SOLIDWORKS与COMSOL的电力变压器主绝缘参数化建模与电场仿真

本科毕业论文基于SOLIDWORKS与COMSOL的电力变压器主绝缘参数化建模与电场仿真（题目：二号，黑体，加粗，居中）学院专业学生姓名学生学号指导教师提交日期电力学院电气工程及其自动化2017年5月3日II印刷封面纸用210g的橙色卡纸I摘要（标题：小二号，黑体，居中，单倍行距，段前、段后各0.5行，两字中间空2字符）（摘要正文共400—600个字；小四号，宋体，1.5倍行距，段首行空两个汉字）本课题基于参数化思想，研究变压器的三维建模与主绝缘结构对电场的影响，采用三维设计软件Solidworks与有限元分析软件COMSOL，实现变压器主绝缘结构的参数化建模和电场优化计算，提高变压器主绝缘的设计效率。本文在广泛阅读大量文献的基础上，首先对变压器CAD技术、仿真模型选取以及电场仿真这三个方面的研究概况进行了总结。并确定采用VBA对Solidworks进行二次开发实现变压器的参数化建模。随后详细说明了变压器的参数化建模。介绍了变压器的主绝缘结构，对变压器参数化变量进行区分以合理减轻程序化建模的编程工作量，建立变压器的特征库使参数化建模模块化，详述零件绘制思路和装配过程，并对用VBA进行程序化建模时的部分重要的细节问题加以说明。在电场仿真部分，首先对仿真条件的设置做了说明，然后针对所建立的变压器模型进行三维电场仿真并进行定性分析与定量分析。变压器整体电场强度分布的定性分析显示变压器高中压绕组中部、铁芯窗内中低压绕组端部、引线的拐角处外侧和均压球外侧圆角处的电场强度较大，故对其中一个绝缘薄弱处进行绝缘裕度的定量分析。随后对中高压绕组中部的薄纸板小油隙结构进行了参数化研究，结果表明绕组间绝缘筒的数量越多，油隙的最小绝缘裕度越高。研究了引线参数对局部最大电场强度的影响。这部分研究可为变压器主绝缘的优化提供参考。此外，通过电场强度的比较，说明了在分析变压器主绝缘绕组部分时，二维轴对称模型是一种合理高效的电场仿真模型。（此处隔一行）关键词：Solidworks；COMSOL；参数化建模；三维电场仿真；电力变压器；主绝缘（“关键词”：小四号，黑体；关键词3—5个：小四号，宋体；关键词之间用分号隔开；最后一个关键词不打标点符号）II（另起页：外文摘要范例；英文摘要和关键词应该是中文摘要和关键词的翻译）Abstract（标题：小二号，TimesNewRoman字体，居中，单倍行距，段前、段后各0.5行）（正文：小四号，TimesNewRoman字体，1.5倍行距，两端对齐）Basedontheparametricthought,thispaperfocusonthe3-Dmodelingoftransformerandtheinfluenceofthemaininsulationstructurechangesontheelectricfield.The3-DdesignsoftwareSolidworksisusedtorealizetheparametricmodeling,andthefiniteelementanalysissoftwareCOMSOLisusedtocalculateelectricfieldintheprocessofpowertransformermaininsulationelectricfieldoptimization.Secondarydevelopmentofthesetwosoftwarecanimproveefficiencyofthetransformermaininsulationdesign.Firstly,thispaperreviewsthestudyoftransformerCADtechnology,simulationmodelselectionandelectricfieldsimulation.AndtodeterminetheuseofVBAonSolidworkssecondarydevelopmenttoachievetheparametricmodelingofthetransformer.Secondly,theparametricmodelingoftransformerisdetailed.Afterintroducingthemaininsulationstructureoftransformer,classificationtoparameterizedvariablesoftransformerisperformedinordertoreasonablyreducetheworkloadofprogramming.Thenfeaturelibraryoftransformerwhichcanmodularizetheparametricmodelingisbuilt.Partsdrawingideasandassemblyprocessaredetailed.Inaddition,someimportantdetailsoftheprogrammingareexplained.Intheelectricfieldsimulationpart,settingofsimulationconditionsisexplainedfirst,then3-Delectric-fieldsimulationoftransformermodelandsubsequentlyanalysisoftheelectricfieldintensitydistributionarecarriedout.Thequalitativeanalysisoftransformer’selectricfieldintensitydistributionshowsthathighelectricfieldintensityappearinthreeplaces,therearethemiddleofhighvoltagewindingandmediumvoltagewinding,mediumvoltagewindingendandlowvoltagewindingendinthetransformercorewindow,corneroftheleadwireandfilletofshieldingelectrode.Quantitativeanalysisofinsulationmarginisperformedinoneplaceabove.AparametricresearchofthestructureofoilandbarriersforIIImaininsulationbetweenthemiddleofhighvoltagewindingandmediumvoltagewindingiscarriedout,itshowsthatmorebarriersbetweenthewindingsresultsinhighertheminimuminsulationmarginoftheoilgapundercertainconditions.Theinfluenceofleadwireparametersonthelocalmaximumelectricfieldstrengthisstudied.Studiesofthesepartscanprovideareferencefortheoptimizationoftransformermaininsulation.Inaddition,thecomparisonoftheelectricfieldintensityshowsthatthetwo-dimensionalaxisymmetricmodelisareasonableandefficientelectricfieldsimulationmodelwhenanalyzingthewindingpartofthetransformermaininsulation.Keywords:Solidworks；COMSOL；Parametricmodeling；3-Delectric-fieldsimulation；Powertransformers；Maininsulation(“Keywords”：TimesNewRoman字体，小四号，加粗，居左）（关键词：TimesNewRoman字体，小四号）IV目录摘要.........................................................................................................................................IAbstract.....................................................................................................................................II目录......................................................................................................................................IV第一章绪论..............................................................................................................................11.1课题研究背景与意义.................................................................................................11.2变压器CAD技术的研究概况..................................................................................11.2.1国外研究概况..................................................................................................11.2.2国内研究概况..................................................................................................21.3变压器仿真模型选取.................................................................................................31.4变压器电场仿真研究概况.........................................................................................41.5论文结构.....................................................................................................................5第二章变压器的三维参数化建模..........................................................................................72.1引言.................................................................................