发电机出口电压互感器二次侧断线造成复压过流保护动作的原因分析

Analysis of causes for compound voltage over-current protection action from generator terminal PT secondary loop break

介绍山美水电站2#发电机出口电压互感器二次侧断线造成励磁装置强励过励动作,引起发电机继电保护动作,造成发电机停机事故,分析了造成这次事故的原因,并提出了解决这类问题的措施。

The No. 2 unit of Shanmei Hydropower Station had ever seen the generator terminal PT secondary loop break led to action of forced and over excitation, action of generator relay protection and emergency shutdown of unit. The author analyzed the causes and put forward solution measures.