发电电动机定子绕组不等节距支路磁势谐波分析

为了研究抽水蓄能电站特定水头非常规绕组发电电动机磁动势谐波,首先对以主波和二极波作为基波的两种求解定子绕组谐波磁势的解析表达方式进行了分析,接着采用以二极波作为基波的磁势求解方法对由不等节距线圈组成的定子不平衡或平衡支路的磁动势进行了谐波分析,并计算得到不同节距组合支路方案的不平衡度。结果表明支路主波节距系数越小,支路主波磁势不平衡度越大。最后有限元结果验证了分析方法的准确性。

Harmonic Magnetic Motive Force Analysis of Stator Winding Unequal-Pitch Branch Circuit for A Generator/Motor

For discussing the harmonic magnetic motive force of an irregular winding generator/motor of a specific head pumped storage power plant,two kinds of analytic expression of stator winding harmonic magnetic motive force respectively based on the fundamental wave of main wave or two-pole wave are firstly analyzed.Then the harmonic magnetic motive force of unequal-pitch balanced or unbalanced branch are calculated by the method based on the fundamental wave of two-pole wave,and the unbalance degrees of different branch connections are gained.Results show that the lower branch pitch factor is,the larger branch main wave magnetic motive force.Finally,the parameters are calculated by finite element method to validate the creditability of the calculation results of the above analytical method.