沙角C电厂发电机出口断路器非全相保护研究

Research on open-phase protection for generator circuit breakers in Shajiao C Power Station

针对沙角C电厂660 MW机组发电机出口断路器的非全相保护只配置有报警回路而没有配置跳闸回路的情况,对发电机出口断路器保护存在的问题进行了分析,提出了改进方案。改进方案从功能实现、保护配置及防止误动等方面进行了综合考虑,使发电机出口断路器的非全相保护得到进一步的完善。

Seeing that the open-phase protection for generator circuit breakers of 660 MW units in Shajiao C Power Station has only alarm circuit but no trip circuit, this paper analyzes the problems of the generator circuit breaker protection, and puts forward corresponding amelioration scheme. The scheme takes under advisement the function realization, protection configuration and misoperation prevention, etc., thus optimizing the open-phase protection for generator circuit breakers.