某220 kV GIS母线跳闸故障分析与处理  

Analysis and Treatment on Busbar Trip of 220 kV GIS

作　　者：夏中原 李威 兰光宇 王晓辉 辛伟峰 陈凯 XIA Zhongyuan;LI Wei;LAN Guangyu;WANG Xiaohui;XIN Weifeng;CHEN Kai(State Grid Henan Electrical Power Company,Zhengzhou 450000,China;State Grid Henan Extra High Voltage Company,Zhengzhou 450000,China;State Grid Henan Electrical Power Research Institute,Zhengzhou 450000,China;State Grid Henan Direct-current Center,Zhengzhou 450000,China)

机构地区：[1]国网河南省电力公司,郑州450000 [2]国网河南省电力公司超高压公司,郑州450000 [3]国网河南省电力公司电力科学研究院,郑州450000 [4]国网河南省电力公司直流中心,郑州450000

出　　处：《高压电器》2023年第6期223-228,共6页High Voltage Apparatus

基　　金：国网河南省电力公司科技项目(GIS设备内部潜伏性异物检测试验方法和多光谱检测技术应用)。

摘　　要：GIS广泛应用于电力系统中,其可靠运行直接影响大电网安全稳定。文中针对一起220 kV GIS母线跳闸事件进行深入分析,通过现场检查、设备解体和仿真分析等多种手段查找原因。综合天气因素和变电站水文环境综合研判,确认故障原因为连日暴雨造成GIS基础不均匀沉降,导致设备渐渐移位,当伸缩节螺栓应力超限时母线筒导电杆从梅花触头中脱落,对筒壁放电跳闸。最后根据故障原因,提出处置措施,为类似故障的分析和处理提供经验参考。GIS is used widely in power system and its reliable operation directly determines safety and stability of large power grid.In this paper,a case of busbar trip of 220 kV GIS is analyzed deeply and the reason for the trip is searched through such multiple means as site inspection,disassembly of equipment and simulation analysis.It is confirmed after comprehensive judgement of weather factors and the hydrological environment of the substation that the reason of the fault is the uneven settlement of GIS foundation due to continuous rainstorm,resulting in the gradual displacement of the equipment.When the stress of bolt of expansion joint exceeds the limit,the conductive rod of busbar enclosure falls off from the tulip contact,discharges to the enclosure wall and trips.Finally,according to the reason of the fault,treatment measures are proposed so to provide experience reference for the analysis and treatment of similar faults.

关 键 词：GIS 沉降 应力 脱落 放电 

分 类 号：TM595[电气工程—电器]