电网故障下发电机瞬时异常振动的电磁分析

Electromagnetic Analysis on Instantaneous Abnormal Vibration of the Generator under Grid Faults

介绍了一次由电网故障导致的2台大容量汽轮发电机因轴承振动引发保护跳闸的事件。对故障时的录波数据进行了研究分析,提出了一种基于定子绕组合成磁势的分析方法,为识别可能影响振动性能的故障特点提供了思路。

An event of the bearing vibration protection tripping of two large-capacity turbine generators caused by the grid faults is introduced.The recorded wave at fault time is studied and analyzed while analytical method based upon the combined magnetic potential in the stator windings is suggested,to provide the thinking method to identify the fault features which is able to affect the vibration performance.