大型水电机组匝间短路保护动作性能分析

随着我国水力发电的大规模发展，水电机组的单机容量越来越大，对大容量水电机组配置有效的主保护方案对机组和系统稳定运行具有重要意义。大容量水轮发电机定予绕组采用多分支结构，其内部故障数量巨大，根据以往的保护设计经验，相间故障一般由纵差保护灵敏反应，本文分析了三峡右岸哈电机组的绕组结构和内部故障形式，利用暂态仿真结果对匝间保护动作性能进行分析,给出了匝间保护配置建议。

Performance Analysis of Inter-turn Fault Protection for Hydroelectric Generators

With the development of large-scale hydroelectric power, the capacity of generator increases, it is very important to set the effective protection scheme for the stability of power system. The stator windings of Large-capacity turbine generator is nmhi-branch, there will be too much internal fault, based on the past designing experience of protection, phase fault is acted by longitudinal differential protection. This paper analyzed the winding structure and internal fault of Three Gorges, using the transient simulation results to analyze the performance of inter-turn fault protection, and then given the protection configuration recommendations for inter-turn fault.