零功率切机保护的技术探讨与论证

Technology Research and Demonstration of Zero-power Tripping Protection

为防止大型汽轮发电机组满载情况下发生正功率突降时,机端断路器未跳闸工况下发生汽轮机损坏事故,零功率切机保护应运而生。文章介绍了南瑞继保RCS-985UP型零功率切机保护原理,并以实际电厂设备参数为模型,经过设备厂家的动模试验,验证了保护原理与逻辑的科学合理性以及保护装置动作的可靠性和安全性。

Zero-power tripping protection was developed to prevent steam turbine damage caused by positive power sag with full load and tripping failure of the terminal circuit breaker. Zero-power tripping protection principles of NA- RI-RELAYS RCS-985UP was introduced in this paper,and the rationality and reliability of this protection and safety of this device was verified by the dynamic model test of actual power plant model.