高电压技术2019，Vol.45Issue(4)：1182-1190,9.DOI:10.13336/j.1003-6520.hve.20181206019
换流阀屏蔽系统表面电场对称多极子曲面边界元法研究
Research on Symmetric Multipole Curved Boundary Element Method for Surface Electric Field of Converter Valve Shielding System
摘要
Abstract
In order to ensure that the corona phenomenon does not occur during the operation of a flexible DC converter valve, it is necessary to design a shielding system to control the surface electric field. However, the shielding system has a complex structure and it is difficult to solve numerically.Consequently, we proposed a symmetric multipole curved boundary element method to calculate the surface electric field accurately and quickly. To increase the calculation speed and reduce the memory occupation, the fast multipole method was used to accelerate the curved boundary element method based on coordinate transformation. The mirror image method was used to convert the closed valve hall problem into multi-plane symmetry problem. Besides, the symmetric relation of multipole expansion coefficients and the binary tree structure with tight bounds were used to further speed up the calculation. The sphere model and shielding system model were used to verify the accuracy by comparison of finite element method, and the improvement effect of this method in computational efficiency was verified by comparison of different methods. The surface electric field of ±160 kV converter valve shielding system was studied. The influence of the valve hall on the surface electric field of the shielding system is obvious, and it becomes more remarkabe as the distance decreases. This method can quickly and accurately calculate the surface electric field, which is an effective tool for optimal design.关键词
换流阀/屏蔽系统/表面电场/对称多极子曲面边界元/镜像法Key words
converter valve/shielding system/surface electric field/symmetry fast multipole curved boundary element method/mirror image method引用本文复制引用
石雨鑫,王泽忠,赵九才..换流阀屏蔽系统表面电场对称多极子曲面边界元法研究[J].高电压技术,2019,45(4):1182-1190,9.基金项目
中央高校基本科研业务费 (2017XS006) （2017XS006）
