丰满水电站重建工程发电机主保护配置方案研究

Research on Fengman Generator Main Protection Configuration Scheme

依据电机制造厂家提供的定子绕组接线图,全面统计了丰满发电机内部故障类型和数量。运用多回路分析法,对发电机并网运行方式下所有可能发生的同槽和端部故障进行了仿真计算,在分析发电机各主保护灵敏度的基础上,进行主保护配置方案的初步选择。经过对各主保护配置方案的详细对比研究,最终确定发电机差动保护采用“两横一纵”的配置格局。在完成发电机内部短路计算的基础上,给予主保护用电流互感器选型方案,可供参考。

It provides comprehensive statistics on the type and quantity of Fangman generator internal faults.And the multi-circuit analysis method has been used to make simulating calculation for all possible same slot and end faults under generator online operation mode.Preliminary choice for main protection configuration scheme will be carried based on the analysis of generator main protection sensitivity.After a detailed comparative study was made for various main protection configuration schemes,it is finally defined that the generator differential protection adopts the configuration of“two horizontal and one vertical”.Meanwhile,the generator stator,rotor earthing protection scheme will be optimized.The plan for type selection of current transformer used for main protection will be provided for reference when the generator internal short circuit calculation is complete.