220kV绝缘子并联间隙电场计算

绝缘子并联间隙作为一种新的“疏导型”防雷保护方式，已经逐步被电网公司所接受并列入相应的防雷要求之中。但是，目前国内对并联间隙的研究还是不多，而且主要集中在并联间隙保护原理以及间隙电极形状等方面，忽略了并联间隙对绝缘子串电场分布的影响。因此，文章选用ANSYS软件利用有限元方法对220kV输电线路采用并联间隙防雷保护装置后绝缘子串的三维电场分布进行分析计算，讨论并联间隙对绝缘子串电场分布的影响。研究认为优化设计后的并联间隙对绝缘子的电位分布有一定的均匀作用。

Calculation of Electric Field for 220 kV Insulator with Parallel Gap

Insulator parallel gap as a new way of protection has been accepted by power grid companies and included into related lightning protection requirement. However,there are quite a few researches on parallel gap till today in China, only focusing on protection principle and electrode gap, and neglecting the impact of parallel gap on electric field distribution of insulator string. Thus,the ANSYS was used to analyze and calculate the 3D electric field distribu- tion of insulator string with parallel gap lightning protection device on 220 kV transmission lines by using finite ele- ment method, discussed the impact of parallel gap on the electric field distribution of insulator string. The study shows that the optimized parallel gap could make the electric field of insulator string more evenly distributed.