三峡大型机组的内部故障分析与保护配置研究

RESEARCH ON INNER FAULTS OF GENERATORS IN THREE GORGES HYDROPOWERSTATION AND GENERATOR PROTECTION SCHEME

文章通过对三峡投标机组绕组结构的详细分析，针对可能的内部故障，采用故障分量法计算出相应的差动电流，并以Ⅰ、Ⅲ号机组为例，分析了两台机组发生内部故障时各种保护方案的灵敏度，并详细讨论了内部故障的保护配置。

After analyzing the winding structure of generators in Three Gorges Hydropowerstation, an algorithm for inner faults which will occur possibly is described in this paper. With fault components the relevant differential current can be calculated by this algorithm. The sensibility of all kind of protection scheme is given and the main protection scheme for internal faults is presented.