RCS-931保护装置异常告警信号的分析与处理

Analysis and Processing of Abnormal Alarm Signal of RCS-931 Protective Device

针对一起保护装置发出TWJ异常告警信号的案例,分析合闸位置监视回路、TWJ接点的作用、RCS-931 TWJ开入回路,最后结合保护装置表象及万用表测量结果,找出本次异常告警信号产生的原因是操作板上的2TWJa常开接点发生了粘连。该故障可能导致保护误动作,故需立即更换操作板,以确保变电站安全稳定运行。

To a case of an abnormal TWJ alarm signal emitted by a protective device,the monitoring loop of closing position,the function of TWJ contact and RCS-931 TWJ opening loop were analyzed in depth.Finally,according to the measurement results of protection device and multimeter,the cause of this abnormal alarm signal was found.The reason was the adhesion of 2TWJa on the operating board and the fault might cause protection to fail.The operation board should be replaced immediately to ensure the safe and stable operation of the substation.