一起直流系统高频开关模块故障简析

直流系统主要用于全厂设备的控制与操作（含220 kV系统,主变、厂用电10 kV/400 V系统）及机组控制、辅助设备控制、继电保护、自动装置、信号复归、机组初励等的电源,以及作为事故照明的备用电源。某电站直流系统投运后,高频开关模块频繁出现故障报警,威胁设备安全运行,经过现场维护人员进行故障跟踪和系统排查,消除隐患,为设备健康运行提供保障。

Fault Analysis on High Frequency Switch Module of DC System

The DC system is mainly used for power supplies for control and operation of whole plant equipments(including 220kV system,10kV/400V systems for main transformer and auxiliary power)as well as unit control,auxiliary equipment control,relay protection,automatic device,signal reset and initial excitation etc.,and also used as standby power supply for emergency lighting. The high frequency switch module of a power station appears frequent fault alarms after putting the DC system into operation,which threatens the safe operation of the equipment.The hidden dangers are eliminated through fault tracing and system investigation carried out by on-site maintenance personnel,which provides a guarantee for reliable operation of equipments.