某电厂发电机振动故障诊断及处理  

Vibration Diagnosis and Disposal for Generator of 600MW Ultra-Supercritical Unit of a Centain Power Plant

作　　者：刘树鹏[1] 葛祥[1] 

机构地区：[1]西安热工研究院有限公司,西安710032

出　　处：《大电机技术》2016年第3期15-18,共4页Large Electric Machine and Hydraulic Turbine

摘　　要：某电厂4号汽轮发电机组带负荷时发电机转子振动不断爬升幵达到跳机值,导致调试进程无法顺利完成。通过现场详细、全面的测试,诊断其故障原因为:热态下转子线圈出现动态匝间短路现象,导致转子局部受热而发生暂态弯曲。这一诊断结论得到了电气专业动态匝间短路试验结果的验证。更换发电机转子后,振动爬升现象彻底消除。机组带负荷稳定运行时,轴系振动达到优良水平。The generator rotor vibrations of a power plant No.4 unit have been in state of gradually climbing and then reached the tripping value during loading, resulting in the commissioning procedure could not be successfully completed. Through detailed and comprehensive field test, it is found that the cause of the malfunction is that the rotor coils occur dynamic intertern short circuit at hot state. It causes the rotor been partially heated and then occurs transient thermal bending. This diagnostic conclusion has been verified by the dynamic interturn short circuit test. The phenomenon of the rotor vibrations climbing has been completely eliminated after replacing the generator rotor. During the unit stable operation with load, the rotor vibrations have been controlled to the excellent level.

关 键 词：汽轮发电机组 发电机 振动 匝间短路 热弯曲 

分 类 号：TM301.42[电气工程—电机]