大型水电机组转子接地保护的应用研究——以溪洛渡、向家坝电站为例

Application of Rotor Grounding Protection in Hydro-turbine Generator Unit in Xiluodu and Xiangjiaba Hydropower Stations

介绍了发电机转子回路接地的危害和配置转子接地保护的必要性,对工程常用的转子一点接地保护的原理和应用进行了分析,结合溪洛渡、向家坝大型水电机组转子一点接地保护的配置、应用以及整定计算等进行了探讨,说明了转子一点接地保护在溪洛渡、向家坝水电机组安全运行中的重要作用。

The necessity of rotor grounding protection is presented by introducing the potential damage caused by grounding of the generator rotor circuit .Several commonly used one-point rotor grounding protection are analyzed , inclu-ding their principles and applications .The configuration , application and setting calculation of such one-point rotor grounding protection in hydro-turbine generator units adopted in Xiluodu and Xiangjiaba hydropower stations are dis-cussed .Importance of the grounding protection for the safe operation of hydropower generator units are demonstrated .