大型汽轮发电机转子绕组匝间短路故障的诊断研究

Study on the Diagnosis of Inter-turn Short-circuit Fault in Rotor of Large Turbogenerator

本文对大亚湾核电站900MW汽轮发电机转子绕组匝间短路故障的检测和诊断方法进行了介绍和分析,结合实际的运行经验,就大型汽轮发电机转子绕组匝间故障诊断技术的特点及存在的问题进行了研究和探讨,提出了转子绕组匝间短路故障的三种状态和对应各种状态模式下检测方法的适用性评价,指出了为进一步提高匝间短路故障的诊断水平应采取的改进措施。

This paper presents the method to detect and diagnose the interturn faults in 900MW generator rotor in Daya Bay Nuclear Power Station.On the basis of practical operation experience,features and problems in respect of the diagnosis techniques are studied.The adaptability of the test methods for three types of interturn shortcircuit faults is evaluated.Suggestions are given on how to improve the diagnosis level. 