介绍了一起500 kV GIS隔离开关气室绝缘闪络的事故分析过程。通过对隔离开关故障电流的分析、SF6气体成分的检测以及对故障气室的解体、SF6固体分解产物的电镜扫描,认为隔离开关均压环的装配工艺不良、紧固螺丝没有拧紧至应有的力矩,使得接触电阻增大、螺丝发热通流烧熔,是此次绝缘闪络事故发生的主要原因。通过对这起事故的分析研究,对今后GIS类似故障的处理分析提供借鉴与参考。
王静君, 黄瑜珑
doaj
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