重复脉冲法在发电机转子一点接地故障诊断中的研究与应用  

Research and Application of Repetitive Surge Oscillograph Method in One-point Ground Fault Diagnosis of Generator Rotor Winding

作　　者：俞卫新 王晓剑 何天磊 胡磊 徐俊元 陈聪 梁辰 YU Weixin;WANG Xiaojian;HE Tianlei;HU Lei;XU Junyuan;CHEN Cong;LIANG Chen(China Power Hua Chuang Electricity Technology Research Co.,Ltd.,Shanghai 200086,China;China Power Hua Chuang(Suzhou)Electricity Technology Research Co.,Ltd.,Suzhou 215123,China)

机构地区：[1]中电华创电力技术研究有限公司,上海200086 [2]中电华创(苏州)电力技术研究有限公司,江苏苏州215123

出　　处：《大电机技术》2021年第6期22-27,共6页Large Electric Machine and Hydraulic Turbine

基　　金：中国电力国际发展有限公司科技项目(2018-001-ZDG-KJ-X)。

摘　　要：为了研究重复脉冲(RSO)法在发电机转子一点接地故障诊断中的应用,在现场利用实际的转子进行了短路模拟试验,利用RSO试验仪测试得到不同位置短路时的电压响应波形和特征波形,同时,分析了不同激励条件下的响应特性。试验结果表明:RSO法适用于发电机转子绕组一点接地故障的检测与定位,试验时激励波形应选择锯齿波,而且通过特征波形的电压幅值和电压偏差率,可以快速判断转子绝缘是属于接地故障还是匝间短路故障,为现场分析转子绝缘的故障类型提供了支持。In order to study the application of the repetitive surge oscillograph(RSO)in the diagnosis of one-point ground fault of generator rotor,the simulated short-circuit test of the rotor is carried out on the site.The voltage response curves and characteristic curves of different positions of short-circuit are obtained by using the RSO test.At the same time,the response characteristics under different excitation conditions are analyzed.The test results show that RSO is suitable for the detection and location of one-point ground fault of generator rotor winding.During the test,the sawtooth wave should be selected as the excitation waveform.Moreover,through the voltage amplitude and the voltage deviation rate of the characteristic curve,it can simply judge whether the rotor has ground fault or turn to turn insulation short-circuit fault,which provides support for the field rapid analysis of fault types.

关 键 词：发电机 转子绕组 一点接地故障 重复脉冲法 

分 类 号：TM307[电气工程—电机]