35 kV开关柜的相间电场分布与屏障放电分析

Analysis of Phase to Phase Electric Field Distribution and Barrier Discharge in 35 kV Switchgear

摘要: 35kV开关柜内的相间绝缘屏障上的放电现象已出现过多起，严重的已导致发生相间闪络。通过分析发现这些出现放电现象的开关柜都已运行一定的时间。本文结合相间电场的分析和产生放电的条件，逐一剖析了屏障放电的基础条件和必要条件，并对相间设置的屏障位置对电场分布的影响做了分析，提出了消减屏障上放电的多种措施，优选在相线附近设置硅橡胶材质制作的屏障的方法。

Abstract: In 35 KV switchgear, the discharge phenomenon of interphase insulating barrier has occurred many times, and it led to a severe interphase flashover when severely. Through the analysis, it is found that these discharges switchgear have run for a certain period of time. In this paper, the interphase electric field and the condition of discharge are analyzed, and the basis and necessary condition of the barrier’s discharge are analyzed, too. The relationship between the position of the barrier and electric field distribution is analyzed, and many measures are proposed to prevent the barrier’s discharge. According to the comparison, setting a barrier made by silicone rubber near the phase line is best.