零功率保护在REG670中的实现及定值整定

零功率保护在大型发电机组中作为汽轮机超速、发电机过电压、锅炉等热力系统的保护,主要利用功率与频率突变量作为特征量,判断零功率状况,出口迅速切换厂用电及停机。由于REG670保护装置不能实现对功率突变量的检测,在对REG670研究后,结合铜陵电厂实际情况,优化相关零功率保护逻辑设计,并简要介绍零功率保护的定值整定情况。

Zero-power Protection Realization in REG670 and the Value of Setting

In a large generator units as steam turbine over speed,generators over voltage,boilers and other heating system protection,zero-power protection mainly uses the power and frequency mutations as characteristic quantities,judging zero-power status,and export quickly switching auxiliary power and generator outage.As REG670 protection devices can not achieve the detection of power mutation amount,after the study of REG670,combined with the actual situation of Tongling Power Plant,some related zero-power protection logic design is optimized,and the value of setting of the zero-power protection is described briefly.