应用快速多极子曲面边界元法的换流阀塔电场计算  

Calculating of Electric Field of Converter Valve Tower by Using Fast Multipole Curved Boundary Element Method

作　　者：王泽忠[1] 石雨鑫[1] 刘丽平[2] Wang Zezhong;Shi Yuxin;Liu Liping(Beijing Key Laboratory of High Voltage & EMCNorth China Electric Power University Beijing 102206 China;Electric Power Research Institute Beijing 100192 China)

机构地区：[1]高电压与电磁兼容北京市重点实验室(华北电力大学),北京102206 [2]中国电力科学研究院,北京100192

出　　处：《电工技术学报》2019年第2期203-211,共9页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费资助项目(2017XS006)

摘　　要：直流换流阀塔电场的精确快速计算对于阀塔设计具有重要指导意义,但是阀塔结构复杂,规模巨大,多种介质混合存在,数值求解存在较大困难。针对该问题,提出多介质多极子曲面边界元法。以静电场多介质边界积分方程为基础,解决多介质共存问题。提出多介质情况下多极子的展开形式,利用改进的多极子方法加速基于坐标变换的曲面边界元,提高计算精度,降低计算代价。通过带有均压环的绝缘子模型,与不同方法比较验证算法的计算准确度和效率。使用实际换流阀塔模型研究绝缘子对金具表面电场的影响以及绝缘子内部电位和电场的分布情况。最后应用该算法分析±160kV换流阀单桥臂的电场。本文方法适合于分析多介质共存的大规模电场问题,是直流换流阀塔优化设计的有效工具。The accurate and rapid calculation of electric field of DC converter valve tower has guiding significance in the design process.However,the structure of tower is complex and large,and the multi-media exists.The numerical analysis has great difficulty.Therefore,the fast multipole curved boundary element method considering multi-media was proposed.Based on the multiple dielectrics boundary integral equation of the electrostatic field,the problem of the multi-media was solved.The fast multipole expansion type for multi-media was proposed.The improved fast multipole method was used to accelerate the curved boundary element method based on coordinate transformation,which improved the calculation accuracy and reduce the computational cost.Compared with different methods,the accuracy and efficiency of the algorithm were verified by the insulator model with corona ring.The effect of insulators on the electric field of fittings as well as the distribution of the voltage and electric field of insulators was analyzed by using converter valve tower model.With this method,the electric field of±160kV converter valve single bridge model is analyzed.This method is suitable for analyzing the large-scale problem of multi-media coexistence,which is an effective tool for optimizing the design of converter valve tower.

关 键 词：换流阀塔 静电场 绝缘子 曲面边界元 快速多极子 

分 类 号：TM15[电气工程—电工理论与新技术]