发电机绕组端部引起黄粉的原因和分析处理  

Analysis and treatment of yellow powder caused by winding end of generator

作　　者：谢玉华[1] XIE Yuhua(Datang Huaibei Power Generation Branch,Huaibei 235000,China)

机构地区：[1]大唐淮北发电厂,淮北235000

出　　处：《上海大中型电机》2022年第4期54-57,共4页Shanghai Medium and Large Electrical Machines

摘　　要：结合发电机绝缘故障处理实例分析,发现机组频繁深度调峰,影响各部件材料的热膨胀不一致,也是造成发电机线圈(定子线棒)绝缘件松动的原因,引发定子端部出现黄粉,从而导致发电机定子绕组绝缘击穿而发生接地故障。提出了相应的防范措施,供行业内专业人员参考,以期确保电力生产安全。Combined with the case analysis of generator insulation fault handling, it can be found that frequent deep load changing of the unit and the inconsistency of the expansion affecting the materials of each component also cause the loosening of generator coil(stator wire rod) insulation which leads to the yellow powder appearing at the end of stator as a result to cause the breakdown of generator stator winding insulation and ground fault. It has as also put forward corresponding preventive measures for reference of the professionals in the industry in order to ensure the safety of electricity production.

关 键 词：发电机振动 绝缘损坏 紧固件质量 黄粉 

分 类 号：TM307[电气工程—电机]