巨型水轮发电机磁极故障分析及其对策  

Analysis and Treatment of Magnetic Pole Faults in Giant Hydro-turbine Generator

作　　者：范浩浩 陈锋 袁志明 任少婷 杨宗振 FAN Haohao;CHEN Feng;YUAN Zhiming;REN Shaoting;YANG Zongzhen(Baihetan Hydropower Plant, China Yangtze Power Co., Ltd., Ningnan 615400, China)

机构地区：[1]中国长江电力股份有限公司白鹤滩水力发电厂,四川宁南615400

出　　处：《水电与新能源》2021年第6期53-56,共4页Hydropower and New Energy

摘　　要：某水电站巨型水轮发电机转子磁极在出厂交流耐压试验中多次出现磁极L围带处铁支撑板对磁极线圈放电故障,且发生频率较大,容易造成磁极围带处绝缘性能降低最终引起发电机转子接地,对发电机安全稳定运行构成极大危险。通过分析磁极结构原理和L围带处装配工艺,查找故障原因,最终从磁极L围带装配工艺上采取优化对策,使产生故障的潜在因素得到有效处理。In the factory AC withstand voltage test of the magnetic poles of the giant hydro-turbine generators in a large-scale hydropower station,discharge from the L-shaped iron support plate of the shroud ring to the magnetic pole coils is observed for many times and in a high frequency.The discharge may deteriorate the insulation performance of the pole shroud ring and cause the grounding fault of the generator rotor,which poses a great threat to the safe and stable operation of the generator.With the analysis of the magnetic pole structure and the assembly process of the L-shaped shroud ring,causes of the fault are determined.Treatment measures are then proposed for the assembly process of the L-shaped shroud ring,which successfully eliminate the causes the problem.

关 键 词：发电机 磁极 L型铁支撑板 U型绝缘垫板 围带结构 对策 

分 类 号：TK73[交通运输工程—轮机工程]