发电机转子绕组匝间短路故障检测方法的研究

Detecting Methods about Interturn Short Circuit Fault in Rotor Windings of Turbogenerator

介绍了几种动态检测汽轮发电机转子绕组匝间短路故障的方法,比较了各种方法的优缺点,并重点介绍了在探测线圈法基础上将小波分析用于转子绕组匝间短路故障的检测方法,指出小波分析方法适用于探测线圈感应电动势动态非平稳故障信号的特征提取,适合于汽轮发电机转子绕组匝间短路实时的故障检测。

Various fault diagnosis methods about intertern short circuit in rotor windings of turhogenerator are presented firstly. Advantages and disadvantages of each method are compared. Wavelet analysis detection method which is introduced to detect the fault of interturn short circuit in rotor windings based on the detecting coil method is recommended in detail. Simulation test result indicates that wavelet analysis method is applicable to extract fault characteristic of the dynamic and non-stability induced electromotive force signal and fits for real-time detection of interturn short circuit fault in rotor windings of turbogenerator.