抽水蓄能机组磁极压板故障原因分析及处理

Cause Analysis and Treatment of Magnetic Pole Pressure Plate Fault for Pumped-Storage Generator

针对某抽水蓄能电厂机组磁极T形压板翘起的异常现象,对机组非全相及电气制动误强励运行状态下的压板受力进行了分析计算,利用有限元仿真研究了电磁力和离心力的变化对压板的影响,确定故障原因为电气制动误强励,使磁极T形压板所受的向心合力超过了设计允许值而发生弯曲翘起;并提出了防止类似事件再次发生的建议。

In view of the abnormal phenomenon that the magnetic pole T-shaped platen in a pumped-storage power plant is cocked up, the force on the platen is calculated in the operating condition that the unit is in open-phase running and the electric brake is in the false forced excitation operation. The influence of the change of electromagnetic and centrifugal forces on the platen is studied by using the finite element simulation, and the cause of the fault is determined to be the electric brake with false forced excitation. So that the centripetal force on the magnetic pole T-shaped platen exceeds the limits of bending and warping, which results in deformation. And some suggestions that prevent from the similar incidents are put forward.