三峡右岸电站DFEM发电机主保护配置优化

Optimization of main protection configuration for DFEM hydro-generator of TGP hydropower station on right bank

介绍了三峡水利枢纽右岸电站东方电机厂生产的特大型水轮发电机更改发电机定子绕组接线形式的原因和具体方案。结合现场安装实际,通过对定子线棒设计图的分析研究,对比了改接线前后定子绕组结构的变化情况、定子绕组可能出现的短路故障类型和位置及其新的故障特点与规律,并在此基础上,提出了可以提高该机组主保护配置在发生内部短路故障时的动作灵敏度的一种改造方案。

The reason and detailed scheme of stator winding reconstruction of the large hydro-generator of TGP hydropower station on right bank introduced.With the combination of field installation and the analysis on stator bar blueprint,the comparisons of stator winding structure,the probable stator short-circuit failure type and its position,as well as the characteristics and laws of new failure before and after the stator winding reconstruction are made.On this basis,an alterative scheme that can improve the sensitivity of the generator main protection in case of internal short-circuit failure is put forward.