基于发电机匝间短路的轴电压故障分析  

Analysis on Shaft Voltage of Rotor Winding Inter-turn Short Circuit on Turbine Generators

作　　者：王晓华[1] 李永刚[2] 武玉才[2] 

机构地区：[1]国网河北省电力公司检修分公司,石家庄050070 [2]华北电力大学,河北保定071003

出　　处：《大电机技术》2017年第1期36-39,共4页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金(50677017)

摘　　要：随着发电机容量的增大,轴电压已成为发电机的一个常见故障问题,因此进行发电机状态监测是非常有必要的。本文阐述了发电机轴电压产生机理;通过分析汽轮发电机转子匝间短路故障运行时磁势变化,推导出转子匝间短路后轴电压信号特征频谱。并分析了发电机定子接缝不对称引起的轴电压变化。基于轴电压故障特征信号,提出了通过轴电压监测转子匝间短路故障的方法。并且通过实验验证了理论分析的正确性。As turbine generators capacity increases, shaft voltage has become a serious problem in large generators, and so it is very necessary to monitor. This paper introduces shaft voltage mechanism in turbine generators, and through analyzing the magnetic potential under rotor winding inter-turn short circuit fault condition, the shaft voltage characteristics are investigated. Based on the shaft voltage fault character, a method based on shaft voltage is found to identify the fault on inter-tum short-circuit in turbine generator rotor winding. Experiment shows that the theoretical analysis are right.

关 键 词：转子匝间短路 轴电压 磁动势 故障识别 

分 类 号：TM307.1[电气工程—电机]