基于ANN的发电机转子绕组匝间短路诊断方法

Diagnosis for Turn-to-turn Short Circuit of Rotor Windings in Turbo Generator

分析了发电机转子绕组发生匝间短路后的电磁特性及电机气隙磁场 ,得出在确定的运行状态下 ,发电机励磁磁动势Ff 故障前后维持不变。

This paper analyzes the electric magnetic features when inter-turn short circuit occur in turbo-generator rotor, and reveals that excitation EMF is constant in a fixed condition whereas the exciting current increases in case of inter turn fault .On the basis of mechanism, the authors put forward a method to generate training patterns without doing destructive tests. ANN is used to diagnose inter turn short circuit in turbo-generator rotor and estimate fault turns ratio.