多分支大型水轮发电机的内部故障计算及灵敏度分析是确定大型发电机保护的理论依据 ,文中用一种新的内部故障仿真软件对一台大型水轮发电机内部故障进行计算 ,并在计算结果的基础上 ,分析了裂相保护、不完全纵差保护、单元件横差保护和传统纵差保护等几种主保护的灵敏度 ,比较其优劣 ,以期为大型水轮发电机组内部短路主保护的最佳方案选择提供依据。 Multi-branch large hydroelectric generator internal fault calculation and sensitivity analysis is to determine the theoretical basis for large-scale generator protection, a new internal fault simulation software to calculate the internal fault of a large hydroelectric generator, and in the calculation Based on the results, the sensitivity of several kinds of main protection such as split phase protection, partial differential protection, single component differential protection and traditional longitudinal differential protection are analyzed, and the advantages and disadvantages are compared. Protection of the best options to provide the basis.