HVDC换流阀屏蔽系统表面电场边界元与场域元耦合计算  

BEM-DEM Coupling Calculation of Surface Electric Field for HVDC Converter Valve Shielding System

作　　者：王泽忠[1] 李立凡 刘莹 王欢[1] 杨箫箫 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206

出　　处：《高压电器》2018年第3期70-78,85,共10页High Voltage Apparatus

摘　　要：绝缘子是直流输电换流阀塔的重要组成部分,针对绝缘子的分析对于换流阀塔的设计具有重要意义。文中考虑支柱绝缘子的换流阀屏蔽系统的表面电场分布,提出了基于积分方程的场域元与边界元耦合的计算方法。将场域元法与边界元法耦合,共同模拟考虑支柱绝缘子的换流阀屏蔽系统。通过与二维有限元算法的对比,验证了算法的正确性。建立不同情况下的换流阀屏蔽系统模型,采用耦合算法对其进行分析,得出了考虑绝缘子前后屏蔽系统的电场分布以及绝缘子内部的电场分布,提高了计算精度,拓展了传统边界元算法的应用范围。The insulator is an important part of the HVDC converter valve, and the electric field analysis of the converter valve is very important for the design of the HVDC converter valve. In this paper, the surface electric field distribution of the converter valve shield system considering the post insulators. In order to improve the calculation efficiency, the integral equation field domain element and boundary element coupling method is proposed. The integral equation field domain element method is introduced into boundary element method（BEM） to deal with the calculation. The method is proved to be correct through the comparison with 2D finite element method result. The post insulator models in different situation is built, by use of coupling method, the surface electric field intensity of shielding system and the electric field in the insulator are analyzed,and the range of application of boundary element method is broaden.

关 键 词：耦合法 换流阀 屏蔽系统 表面电场 绝缘子 

分 类 号：TM721.1[电气工程—电力系统及自动化]