文档介绍：第 27 卷第 27 期中国电机工程学报 Sep. 2007 2007 年 9 月 Proceedings of the CSEE ?2007 . 文章编号: 0258-8013 (2007) 27-0050-06 中图分类号: TM151 文献标识码: A 学科分类号: 470 ? 40 1000kV 立柱式氧化锌避雷器三维电位分布计算及均压环设计韩社教 1 ,李平舟 1 ,路彦峰 1 ,张西元 2 (1 .西安电子科技大学理学院,陕西省西安市 710071 ; 2 .西安西电高压电瓷有限责任公司,陕西省西安市 710077) 3D Potential Distribution Calculation and Design of Grading Rings for Post-type ZnO Surge Arrester for 1000kV Substation HAN She-jiao 1 , LI Ping-zhou 1, LU Yan-feng 1, ZHANG Xi-yuan 2 (1. Science school, Xidian University, Xi’an 710071, Shaanxi Province, China; 2. Xi’an xidian porcelain insulator corpora tion, Xi’an 710077, Shaanxi Province, China) ABSTRACT: Based on the idea of the region division, a half spherical fictitious boundary is employed to divide the 3D upper half free space unbounded region into an internal subregion and an external unbounded subregion. In the internal subregion the field is formulated by traditional finite element method. Meanwhile, the external unbounded subregion is treated as a big element on whic h the eigenfunction expressions satisfied the Laplace's equation with homogeneous boundary conditions at infinity are used as interpolation function and thus the difficulty in discretizing the infinite region for FEM is e radically. Moreover, a new approach called hybrid finite element—analyt ical approac