应用多回路理论建立水轮发电机定子绕组内部故障分析的通用数学模型，引入回路关联矩阵减少回路方程总数并自动形成各种故障形式的回路参数，对水轮发电机定子绕组内部故障的稳态性能进行仿真计算，探讨了水轮发电机定子绕组内部故障（如匝间短路、支路间短路等）规律。 The multi-loop theory is used to establish the general mathematical model for the internal fault analysis of the stator winding of hydro-generator. The circuit correlation matrix is ​​introduced to reduce the total number of loop equations and automatically form the loop parameters in various fault modes. Performance simulation calculation to discuss the law of stator winding internal faults (such as inter-turn short circuit, branch short circuit, etc.) of hydro-generator.