一起隐极同步发电机转子阻尼绕组烧损故障的检测与处理  

Detection and Treatment on a Rotor Damper Winding Burning Fault Encountered by a Non-salient Pole Synchronous Generator

作　　者：冯宇哲 李新斌 王展宏 王新 杨立川 FENG Yuzhe;LI Xinbin;WANG Zhanhong;WANG Xin;YANG Lichuan(Zhejiang Electric Power Research Institute,Hangzhou 310014,China;Wenzhou Gas Turbine Power Generation Co.,Ltd.,Wenzhou 325038,China;Zhejiang Zheneng Technology Research Institute Co.,Ltd.,Hangzhou 311121,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,浙江杭州310014 [2]温州燃机发电有限公司,浙江温州325038 [3]浙江浙能技术研究院有限公司,浙江杭州311121

出　　处：《电工技术》2024年第1期116-118,121,共4页Electric Engineering

摘　　要：针对灵活性运行方式下发电机转子故障日趋增多的问题,以某台148.5 MVA汽轮发电机为例,介绍了启机过程中出现的轴振爬升情况,轴振与有功功率的相关性明显强于无功功率和励磁电流,重复脉冲法试验结果显示转子匝间绝缘性能存在下降趋势。转子返厂解体后,发现护环内阻尼绕组存在明显的烧损现象。该案例是典型的转子阻尼绕组烧损故障案例,采用的检测判断方法和故障处理经验对相关人员具有一定的借鉴作用。Nowadays commonly adopted flexible operating conditions cause increasing occurrence of generator rotor faults.This paper focuses on a rotor damper winding burning fault encountered by an actual 148.5 MVA generator.It reports and describes:the increase of shaft vibration during generator start-up process,the correlation between shaft vibration and active power significantly stronger than that between reactive power and excitation current,and the deterioration trend of rotor inter-turn insulation determined by means of repetitive surge ociloscope(RSO),as well as the observation of obvious burning marks on damper winding in retaining ring by returning disassembly of the rotor.The reported case is a typical damper winding burning fault,of which the adopted detection method and treatment experience may be useful for coping with similar events.

关 键 词：发电机 转子绕组 阻尼绕组 烧损故障 

分 类 号：TM307[电气工程—电机]