Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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GIS过热案例分析及回路电阻检测方法探讨

来源:电工电气发布时间:2017-12-19 14:19 浏览次数:4
GIS过热案例分析及回路电阻检测方法探讨
 
邓威
(广东电网有限责任公司中山供电局,广东 中山 528400)
 
    摘 要:GIS设备过热故障原因主要有导体连接部位螺栓松动、电弧灼伤、弹簧疲劳、接触面积减小等造成接触电阻增大,温度急剧升高,导体或紧固件熔化导致设备短路故障。在分析几起GIS设备过热故障、异常案例的基础上,评估了回路电阻检测、气体分解物测试、局部放电检测等几种方法对于GIS过热故障前预防、故障后定位的应用效果,认为回路电阻检测对于发现各种原因导致的GIS过热缺陷最为直接有效。经模拟实验辅助验证,证明了该方法的有效性,并对GIS设备回路电阻检测提出了相关建议。
    关键词:GIS;过热;案例分析;回路电阻检测
    中图分类号:TM595     文献标识码:A     文章编号:1007-3175(2017)12-0051-05
 
Case Analysis and Discussion on Loop Resistance Detection Method for Overheat of Gas Insulated Switchgear
 
DENG Wei
(Zhongshan Power Supply Bureau of Guangdong Power Grid Co., Ltd, Zhongshan 528400, China)
 
    Abstract: The overheat faults of gas insulated switchgear (GIS) equipment were caused mainly by the conductor connection bolt looseness, arc burning, spring fatigue, contact area reduction and so on, which gave rise to the contact resistance increasing, the temperature rising sharply and the conductor or fastener melting, resulting in the equipment short circuit faults. This paper analyzed several faults and abnormal cases of GIS equipment overheat and evaluated the application effect for the prevention before GIS equipment overheat faults and the location after faults by the loop resistance, gas decomposer and partial discharge etc detection methods. The loop resistance detection was the direct and effective method to find various kinds of reasons leading to the GIS overheat defect. The auxiliary verification of simulation experiment verifies the validity of this method. This paper proposes some suggestions on the loop resistance detection of GIS equipment.
    Key words: gas insulated switchgear; overheat; case analysis; loop resistance detection
 
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