超高压电力变压器主绝缘电场计算

Major Insulation Field Calculation of UHV Transformer

绝缘是电力变压器的重要组成部分,它影响着电力变压器的运行可靠性以及经济性。在超高压和特高压电力变压器绝缘设计中,主绝缘电场的分析计算是绝缘结构设计的主要内容,而变压器高低压绕组间的主绝缘电场分布是主绝缘结构设计的基础。分别使用数值计算法和解析法计算了110kV变压器高低压绕组间的主绝缘电场并对计算结果进行了比较,结果显示两种方法得到的计算结果吻合较好。最后对两种方法的特点进行了总结。

Insulation is an important part of power transformers. It affects reliability and economy of the transformer operaction. For the insulation design of UHV and EHV transformer, the analysis calculation of the major insulation field is main content of the insulation structure design, and the major insulation field distribution between the high-low windings of the transformer is basic to the main insulation structure design. Use numerical calculation method and analysis method sparately to calculate the main insulation field between the high-low windings of 1 lOkV transformer and compare the calculating results. The result shows that the two methods get fine dcalculating results. Finally, the characteristic of the two methods have been summarized.