摘要
定子绕组绝缘过低是水轮发电机的重大安全隐患。根据某水电站机组定子绕组试验放电的现象和试验数据,结合水轮发电机的结构特点,判断定子绝缘过低主要原因是定、转子绕组绝缘受潮,并采取投加热器辅助空载烘干方法处理绝缘受潮,使机组绝缘恢复正常。实践效果表明了该方法的有效性。
Low insulation of stator windings is a major safety hazard for hydro-turbine generators.Based on the discharge phenomena and the test data from the stator winding tests of a hydro-turbine unit,and considering the structural characteristics of hydro-turbine generators,it is determined that the major reason for the low stator insulation is the damp of the stator and rotor winding insulation.Then,a non-load operation drying method assisted with heaters is adopted to treat and restore the damp insulation.The practical results verifies the effectiveness of the proposed method.
作者
谭东念
TAN Dongnian(Hubei Qingjiang Hydroelectric Development Co.,Ltd.,Yichang 443000,China)
出处
《水电与新能源》
2026年第2期73-75,85,共4页
Hydropower and New Energy
关键词
发电机
定子绕组
绝缘过低
受潮严重
空载运行
electric generator
stator winding
low insulation
severe damp
no-load operation
