220 kV零序保护定值整定错误及处理

Diagnose Analysis and Treatment on Fixed Value Setting Error of 220 kV Zero Sequence Protection

分析了某变电站220kV线路保护定检预试中,由于零序保护定值整定错误,导致零序Ⅲ段动作后重合闸不能可靠动作这一问题,通过分析保护逻辑及实际整组试验最终提出解决方案。

This paper analysised a fault in 220 kV substation pretesting which zero sequence protection Ⅲ is not able to reliably acting after reclosing due to fixed value setting error of zero sequence protection. After analysis of protection logic and overall test a solution has been suggested.