电气技术2024，Vol.25Issue(6)：66-71,6.
一起气体绝缘金属封闭开关设备起动过程中断路器接地故障分析
Fault analysis of circuit breaker grounding during the gas insulated switchgear start-up process
乔胜亚 1周鸿铃 1朱晨 1李光茂 1杨森1
作者信息
摘要
Abstract
When there are metal particles in gas chamber of gas insulated switchgear(GIS),it is easy to cause electric field distortion and even insulation breakdown.In this paper,a case of single-phase ground fault of phase C circuit breaker in the process of closing and sending power of 220kV GIS circuit breaker is taken as an example,by using SF6 gas composition analysis,on-line monitoring of partial discharge,disassembly inspection,simulation test of metal particles under scaled model and bolt material analysis,the result shows that when there are metal particles inside the GIS gas chamber,the on-line monitoring partial discharge signal is much larger than the normal signal,but the frequency of the discharge signal is less,and the alarm conditions may not be achieved.The simulation test shows that when there are metal particles inside the GIS gas chamber,the internal insulation breakdown is more likely to occur when the GIS is subjected to vibration shock.The main reason for this failure is the discharge of internal metal particles under the influence of vibration shock and airflow during the start-up process.关键词
单相接地故障/解体检查/模拟试验/在线监测Key words
single-phase ground fault/disassembly inspection/simulation test/on-line monitoring引用本文复制引用
乔胜亚,周鸿铃,朱晨,李光茂,杨森..一起气体绝缘金属封闭开关设备起动过程中断路器接地故障分析[J].电气技术,2024,25(6):66-71,6.
