220 kV双重化配置保护跳闸回路潜在缺陷分析

Analysis of Potential Defects of 220 kV Dual Configuration Protection Trip Circuit

针对某220 kV GIS变电站双重化配置保护改造验收过程中,操作箱第I组跳闸动作灯不亮的现象,采用原理分析、试验验证等方法,深入研究了缺陷成因及两套保护动作时间差异对操作箱跳闸回路的影响和潜在风险,提出了双重化配置保护试验过程中的注意事项与应对措施,研究成果对220 kV及以上电压等级变电站的保护改造验收具有重要的指导意义。

Aiming at the phenomenon that the tripping action light of the first group of the operation box is not on during the acceptance of a 220 kV GIS Substation double configuration protection transformation,the causes of defects and the influence and potential risk of two sets of protection action time difference on the trip circuit of operation box are deeply studied by means of principle analysis and test verification.The precautions and Countermeasures in the process of dual configuration protection test are put forward.The research results have important guiding significance for the protection transformation acceptance of 220 kV and above voltage level substation.