备用电源自动投入装置异常情况分析及处理

备用电源自动投入装置广泛应用于电力系统，常用的备用电源自动投入方式有2路电源互为备用自动投入、备用变压器自动投入及母联断路器自动投入3种。以广东某火电厂#1、#2机组6kV及380V厂用电系统备自投回路的一次故障处理为例，探讨备用电源自动投入装置维护检查工作中的要点和一些需要注意的细节.

Analysis and treatment on the abnormalities of automatic stand-by power switching device

The device of automatic transfer to stand-by power supply （ATS） is widely used in electric power system. There are three operation modes for ATS, one is two power supply sources backing-up for each other, another is automatic transfer to stand-by transformer, and the third one is automatic transfer by bus tie breaker. Here, taking a fault treatment of automatic transfer circuit for the stand-by power supply of auxiliary power system in one thermal power plant＇s No. 1 and No. 2 units of Guangdong, 6 kV and 380 V respectively, for the example, the important points and the problems needed to pay attention in maintenance and checking of ATS were investigated.