发电机组电制动停机过程测速装置误发信号的分析

Analysis of erroneous signal sent by the speed measuring device during the electric brake shutdown process of the generator set

对机组在电制动停机过程中发过速信号的事件,依据实测数据、录波图、矢量图分析了故障的特征和机理,指出故障的原因是发电机出囗PT一次B相保险存在缺陷使其电阻增加,导致电气测频电路出现高于采样门槛值的三次谐波电压所致。