高压断路器SF_6气体泄漏故障分析及处理
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摘要
针对SF_6气体高压断路器盆式绝缘子气体泄漏故障,以某500 kV断路器盆式绝缘子漏气为例,分析了盆式绝缘子密封原理及泄漏原因,导致气体泄漏的主要原因有盆式绝缘子与法兰对接面防腐硅脂质量不合格;注脂不到位,雨雪天产生渗水进一步腐蚀内部O型密封圈,通过打磨腐蚀的法兰表面、擦拭密封连接表面等处理措施,减少泄漏故障的发生,最后提出合理化建议。
Aiming at the gas leakage fault of the basin insulator of SF_6 gas high-voltage circuit breaker, taking the leakage of a 500 kV circuit breaker basin insulator as an example, the sealing principle and leakage reasons of the basin insulator are analyzed. The main causes of the gas leakage are unqualified anticorrosive silicone grease on the butt surface of the basin insulator and flange, inadequate grease injection, water seepage in rain and snow days and further corrosion of the internal O-ring seal. Through polishing the corroded flange surface, wiping the sealing connection surface and other treatment measures, the occurrence of leakage faults is reduced, and finally reasonable suggestions are put forward.
Aiming at the gas leakage fault of the basin insulator of SF_6 gas high-voltage circuit breaker, taking the leakage of a 500 kV circuit breaker basin insulator as an example, the sealing principle and leakage reasons of the basin insulator are analyzed. The main causes of the gas leakage are unqualified anticorrosive silicone grease on the butt surface of the basin insulator and flange, inadequate grease injection, water seepage in rain and snow days and further corrosion of the internal O-ring seal. Through polishing the corroded flange surface, wiping the sealing connection surface and other treatment measures, the occurrence of leakage faults is reduced, and finally reasonable suggestions are put forward.
引文
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[3] 崔景春.气体绝缘金属封闭开关设备[M].北京:中国电力出版社,2016.
[4] 崔景春.高压交流断路器[M].北京:中国电力出版社,2016.
[5] 李永祥,王天正,李艳鹏,等.基于红外成像检漏技术的GIS设备气体泄漏异常分析[J].高压电器,2016(7):185-191.
[6] 张欣,李高扬,黄荣辉,等.不同运行年限的GIS缺陷率统计分析与运维建议[J].高压电器,2016(3):184-188.
[7] 史方颖,周仙娥,于兵.“O”形密封结构在SF6高压电器设备中的设计及应用[J].电力电容器与无功补偿,2014,35(5):60-64.
[8] 高亚娟,赵选勃,王文昌.GIS用三元乙丙、丁腈、氯丁橡胶O形密封圈物理性能比较分析[J].高压电器,2008,44(2):118-121.
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