Unitrol6800备用通道停励方式改进

Improvement of Stop Excitation of Unitrol6800 Backup Channel

核电厂由于孤岛运行模式的特殊性,要求励磁调节器能判别发电机空载、并网和孤岛三种运行方式。Unitrol6800因其备用通道的简化设计,导致发电机在通过发电机出口断路器解列后无法停励。本文对该问题进行分析,提出备用通道停励解决方案,以保证发电机安全可靠运行。

Due to the particularity of island operation mode,NPP requires that excitation regulator can distinguish three operation modes of generator:without load,grid connection and isolated island.Due to the simplified design of the stand-by channel,the Unitrol 6800 cannot stop excitation by the generator after it has been disconnected by the generator outlet breaker.The problem is analyzed and the alternative channel solution to solve the problem is proposed to ensure the safe and reliable operation of the generator.