【作者】 赵峰；

【导师】 卢铁兵； 刘东升；

【作者基本信息】 华北电力大学 ， 电气工程（专业学位）， 2013， 硕士

【摘要】 在变压器设计中，主绝缘设计是影响变压器经济性和安全可靠性的关键技术。随着国内经济的发展，2009年国家电网公司建成并投运了世界上第一条1000kV交流特高压输电线路。作为输电线路的关键设备，1000kV特高压变压器的研制显得尤为重要，而主绝缘设计又成为该变压器研制成功的关键。因此，对1000kV特高压变压器的主绝缘设计进行深入研究具有重要的工程应用与科学意义。本文的主要工作如下：（1）针对1000kV特高压变压器的结构特点，建立了高压线圈与中压线圈之间中部、1000kV引线、高压线圈柱间连接引线等三个关键区域的电场模型。（2）对于前两个模型，采用了加拿大IES（Integrated Engineering Software）公司的ELECTRO软件进行了仿真分析。对于第三个模型，采用了美国AnsoftCorp.公司的Maxwell3D软件进行了仿真分析。通过对计算结果的分析，该三个区域均具有足够的绝缘强度，并指出了绝缘结构中的薄弱点和改进方案。（3）特高压变压器主绝缘设计必须以零局部放电为设计原则。本文将各种绝缘结构归结为油-隔板结构进行了分析，来保证油隙的电场强度低于相应的局部放电的起始电场强度，并达到了足够的裕度。同时，本文还特别注意了与等电位线相交较多的绝缘纸板表面的沿面爬电问题。通过本课题的研究，实现了1000kV特高压变压器主绝缘的设计研究和结构优化，为世界首台1000kV特高压变压器的研制成功和安全可靠运行创造了条件。更多还原

【Abstract】 The main insulation design is the key technology which affects transformer economicoperation, safety and reliability in the transformer design. With the development of thedomestic economy, in2009, the State Grid Corporation of China has completed and put intooperation the world’s first1000kV AC Ultra-High Voltage (UHV) transmission line. As thekey equipment of the transmission lines, the development of1000kV UHV transformer isvery important, so the main insulation design has became the linchpin of the success of thistransformer development. Therefore, it has important engineering applications and scientificsignificance to study in-depth for the1000kV UHV transformer main insulation design.The main works of this paper are as follows:(1) According to the structure characteristics of1000kV UHV transformer, electric fieldmodel is established between the HV winding and MV winding central,1000kV lead,connecting lead between high voltage coils and so on three key areas.(2) For the first two models, the ELECTRO software, which is from IES（IntegratedEngineering Software）corporation in Canada, is used in simulation analysis. For the thirdmodel, the Maxwell3D software, which is from Ansoft corporation in USA, is used insimulation analysis. By analyzing the calculated results, the three areas have sufficientinsulation strength, and the weak points in the insulation structure and improvement schemesare pointed out.(3) The design must be zero partial discharge design principles for the main insulation ofUHV Transformer. This paper analyzes oil-comparting board structure of all kinds ofinsulation structure attributed, to ensure that the initial electric field intensity electric fieldintensity of oil gap below the corresponding partial discharge, and has achieved enoughmargin. At the same time, this paper also pay special attention to and equipotential linesintersect more insulation board surface creepage problem along the surface.Through the study of this subject, the research design and structure optimization of1000kV UHV Transformer main insulation, created the conditions for the successfuldevelopment of the world’s first1000kV UHV Transformer and safe and reliable operation更多还原