线路断线引发多个110kV变电站失压原因分析及反措建议

Analysis and suggestion of voltage failure fault in several 110kV substations caused by line breaking

介绍一起导致多个110kV变电站失压的事故。事故的起因是一条110kV线路A相线夹脱落，导致该线路缺相运行，使得继电保护装置和安稳系统先后动作，随即造成多个110kV变电站相继失压。分析计算表明，采取综合反事故措施，可以减小此类事故的停电范围。

This paper introduces a voltage failure fault which occur in several llOkV substations. The cause is a clamp of some 110kV transmission phase A line fall off and cause this line operation at lacking - phase. The relay protection equipment and stability and safety system operate and cause the voltage failure fault in several 110kV substationso Analysis show that comprehensive anti -accident measures could be taken to reduce power - off range.