一起发电机失磁保护动作原因分析及控制措施

Cause Analysis and Control Measures of Excitation Loss Protection Action of a Generator

某发电厂125MW机组正常运行期间,发生发电机失磁保护动作造成机组跳闸事件。从发电机失磁保护动作的现象进行分析,查找失磁保护动作的原因,制定出具体的解决措施,避免因灭磁开关误动作造成机组跳闸事故的发生。

During the normal operation of a 125 MW unit in a power plant,a genera tor loss of excitation protection action caused the unit to trip.This paper analyzes the phe nomenon of the generator magnetic loss protection action,searches the reasons for the protec tion action and puts forward specific measures to avoid the occurrence of unit tripping acci dent caused by wrong action of the de-excitation switch.