零功率装置的发电机组外送线路中断后超速保护方案

Steam turbine overspeed protection scheme after a sudden large -scale thermal power generating units outgoing transmission line interrupted based on zero power facility

大型火力发电厂在输出通道突然中断的情况下，运行的机组将会发生超速，甚至造成损坏，为避免此类事故的发生，经过分析论证，考虑采用零功率装置方式进行切机，以确保机组设备的安全停运。

Large - scale thermal power plant is in which output channel is break off, operational units will take place overspeed, even cause the equipment damaged. To avoid the accident happened , after analysis and discussion, considering using the way of zero power facility to generator triping , so as to ensure the safety outage of equipments.