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OA
Fault analysis of circuit breaker grounding during the gas insulated switchgear start-up process
气体绝缘金属封闭开关设备(GIS)气室存在金属异物时容易导致电场畸变甚至绝缘击穿.本文结合一起 220kV GIS断路器合闸送电过程中C相断路器发生单相接地故障的案例,通过进行 SF6 气体成分分析、局部放电在线监测、解体、缩比模型下金属异物模拟试验、螺栓材质分析可知,当 GIS 气室内部存在金属异物时,分合闸操作会导致在线监测局部放电信号远大于正常信号,但局部放电信号出现的频次少,可能无法满足告警条件.通过模拟试验表明,若 GIS 气室内部存在…查看全部>>
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 particle…查看全部>>
乔胜亚;周鸿铃;朱晨;李光茂;杨森
广州供电局,广州 510410广州供电局,广州 510410广州供电局,广州 510410广州供电局,广州 510410广州供电局,广州 510410
单相接地故障解体检查模拟试验在线监测
single-phase ground faultdisassembly inspectionsimulation teston-line monitoring
《电气技术》 2024 (6)
66-71,6
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