用分离变量法求解水轮发电机端部三维磁场

Three Dimensional Magnetic Field Analysis in the End Region of Hydrogenerator by the Separation of Variables

本文以分离变量法对水轮发电机端区定子线棒附近的三维磁场进行求解,用所谓“气隙虚拟电流”代替凸极电机气隙的作用,较之汽轮发电机作了改进。本文还对边界条件作了合理的简化,使整个模型较好地反映实际情况。将TS854/156-40型水轮发电机的端部磁场实测值与计算值相比,结果表明,符合程度较好。

The method for three dimensional magnetic field analysis in the neighborhood of the stator bars in the end region of hydrogenerators is given in this paper. The so-called 'fictitious air-gap current' is employed to represent the effect of the air gap of salient poles. Compared with turbogenerators, the 'fictitious air-gap current' is modified. With reasonable simplification on boundary condition, a realistic model is set up. The experimental data on TS 854/156-40 type hydrogenerator show a general agreement with the computed results.