一起110kV变电站事故总异常告警的故障分析

Fault Analysis of Abnormal Alarm for Integrated Accident Signals in 110 kV Substation

针对一起110 kV变电站巡视中发现的间隔事故总异常告警事件,通过原理分析、回路检查,逐步排查出变更防跳回路导致的合闸监视回路失配是造成事故总异常告警的主要原因,在此基础上给出缺陷整改措施并成功消缺,最后给出防范及改进措施,避免此类事件的再次发生。

To a alarm event of interval integrated accident signals found in the inspection of a 110 kV substation,through the principle analysis and circuit inspection,it was found out that the main cause was the mismatch of closing monitoring circuit caused by alteration of the anti-tripping circuit.On this basis,the defect rectification measures were given and the defects were eliminated successfully.Finally,preventive and improvement measures were given to avoid the recurrence of such incidents.