发变组误上电保护和启停机保护的分析

Analysis on the Inadvertent Energizing Protection and Start-stop Protection of Generator-transformer Unit

发变组保护在机组停运后应该正常投入,特别是发变组保护中的误上电和启停机保护,在发变组解列前就应该将其投入,发电机停运后一旦发生对发电机进行反送电的事故,发变组保护会动作于发变组出口断路器使其迅速跳开,使发变组免受伤害。

The generator-transformer protection should be put into normal operation after the unit is out of service,especially the inadvertent energizing and start-stop protection in the generator-transformer protection.It should be put into operation before the generator-transformer unit is disconnected.Once the generator is out of service,if there is an accident that reverses the transmission of power to the generator,the generator-transformer unit protection will act on the generator-transformer outlet circuit breaker to quickly open it,so that the generator-transformer unit is protected from damage.