双馈电机转子绕组匝间短路电磁力计算

Electromagnetic Force Calculation of Doubly-fed Induction Generator with Rotor Turn-to-turn Short-circuit

转子绕组匝间短路是双馈风力发电机的故障之一。基于有限元法对双馈电机建模,计算电磁力,对转子绕组匝间短路进行深入研究。分析发电机的电磁场,垂直和水平方向电磁力变化,以及径向电磁力波和切向电磁力波空间分布,探究了双馈式风力发电机发生转子绕组匝间短路故障时的径向电磁力波谐波含量的变化规律。

The rotor internal turn-to-turn short-circuit is one of Doubly fed induction generator （DFIG） failure. The finite element method （FEM） is used -to model DFIG under various rotor turn-to-turn short-circuit to calculate the electromagnetic force of DFIG with rotor winding interturn short circuit. The paper analyses electromagnetic field, vertical and horizontal direction of electromagnetic force of the generator changes, as well as spatial distribu- tion of radial magnetic force waves and tangential electromagnetic force wave. And then explores the radial electro- magnetic force variation of harmonic content when DFIG with rotor winding inter turn short-circuit fault.