大型水轮发电机端部磁场计算的新模型

A New Model to Calculate the Magnetic Field in the End Regionof Large Hydrogenerator

针对大型水轮发电机端部磁场计算中存在的问题，提出端部磁场计算的新模型。模型将端部磁场的求解区域扩展到定子铁芯中，考虑了叠层结构定子铁芯的各向异性及非线性，提出了边界条件处理的新方法。对样机的分析计算表明：计算结果与实测结果基本吻合。该模型的建立对研究大型水轮发电机端部区域局部过热具有重要意义。

A new model to calculate the magnetic field in the end region of large hydrogenerator is proposed. The region to solve is expanded into the iron core, and the anisotropic and nonlinear stator core is considered. A new method to treat the boundary conditions is presented. The calcu- lated results are identical to the measured results. The model has great significance in studying the local over-heating in the end region of large hydrogenerators.