摘要
干燥带的产生极大地改变了污秽绝缘子表面电场分布,并且干燥带与局部电弧以及污闪的发生密切相关。基于此,利用ANSYS有限元分析软件建立了绝缘子三维电场计算模型,利用准静态谐分析法分析了交流情况下干燥带的形成、沿面分布、宽度、角度、数目等对污秽绝缘子沿面电位及电场分布的影响。结果表明:干燥带对污秽绝缘子电场分布有明显的畸变作用,干燥带区场强变大;干燥带区最大场强与其在绝缘子表面位置有关,沿绝缘子表面轴向呈非对称U型变化趋势,且下表面产生的干燥带场强大于上表面;干燥带上各处场强大小不同,中心处场强最大,且随干燥带在绝缘子表面周向角度增加而增加,随轴向宽度增加而减小;干燥带数目的增加会削弱彼此的场强。
The appearance of dry band significantly affects the electric field distribution and the partial arc as well flashover. In order to investigate the characteristics of dry band under different conditions, a three-dimension model of polluted insulator was established. The effects of formation, location, width, radian and number of dry band on potential and electric field distribution were investigated based on the analysis of electric field using the finite element method by the ANSYS simulating analysis soft. The results show that there will be obvious aberration in the electric field distribution of insulator when the dry band appears on the surface of polluted insulator, which will strengthen the dry band＇s electric field. The maximum electric field of dry band is related to its location on the insulator surface, and it has a trend of asymmetric U type along the axial direction on the surface of insulator. The dry band on underside surface of insulator has a larger influence on the electric field distribution than that on upper surface. The maximal value appears at center of dry band, which increases with the growth of dry band angle along the circumferential direction on the surface of insulator, and decreases with the growth of dry band width along the axial direction on the surface of insulator. The increase of dry band number will decrease the electric field reciprocally.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第10期2421-2426,共6页
High Voltage Engineering
基金
武汉高压科学研究基金(WGKYJJ-02)~~
关键词
绝缘子
干燥带
电场分布
ANSYS
有限元法
三维模型
insulator
dry band
electric field distribution
ANSYS
finite element method
three-dimension model
