柘溪250 MW水轮发电机主保护配置方案设计

多分支发电机定子绕组形式的差异导致了发电机不同的内部故障形式,主保护配置方案的设计需要针对具体故障集的整体保护效果展开研究,以确定发电机中性点引出方式和主保护配置原则。文章以湖南省柘溪水力发电厂扩建工程中250MW水轮发电机为对象,基于实际内部短路故障集内故障的保护效果分析,确定了主保护配置方案,可作相关工程参考。

Design of main protection configuration scheme for Zhexi 250MW hydraulic generator

Different stator winding types of multi-branch generator lead to different internal short circuit fault aggregation,and the main protection scheme research must base on this fault aggregation to decide the optimized branch grouping style on neutral side and the main protection configuration principles.The paper analyzes the stator winding type and internal short circuit faults of 250MW generator in Zhexi hydraulic power station,based on the transient fault simulation results and their protection effects under different main protection schemes,to decide the optimized main protection scheme of this generator.The design process provides a reference for relevant research and engineering application work.