基于小波变换的发电机转子绕组匝间短路故障在线检测方法

Detection of Interturn Short-Circuit Fault in Generator Rotor Windings Based on Wavelet Transform

分析了发电机转子绕组匝间短路故障的机理,以及小波分析方法用于该故障的检测原理,将小波变换应用于突变信号的检测,提取其故障特征,以实现对转子绕组匝间短路故障的检测及故障点的定位。仿真结果表明,小波分析方法适用于转子绕组匝间短路故障的在线检测。

The fanlt mechanism of interturn short-circuit in generator rotor windings and the theory of wavelet analysis are analyzed. It applies wavelet transform to inspecting abruptly changed signals, and extracts the fault characteristics ,thereby realizes the detection of interturn short circuit fault and finds the fault position. The results of simulation show that wavelet analysis is suitable for on-line fault detection of interturn short circuit in generator rotor windings.