双馈风力发电机运行控制及其空间矢量分析

以分析双馈风力发电机交流励磁的电磁本质为目标,运用空间矢量理论建立了双馈风力发电机的空间矢量模型;在此基础上,建立了变速变桨双馈风力发电机组的整机模型,给出了不同运行状态下的仿真曲线。在转子绕组自行闭合与加入转子交流励磁2种情况下,对双馈电机中定转子磁动势空间矢量的相位变化进行对比,揭示了交流励磁对于改变转子磁动势空间矢量相位的作用。研究结果表明,当双馈电机运行在亚同步状态时,通过控制交流励磁电流可以使转子磁动势空间矢量的相位超前于定子磁动势空间矢量的相位,从而使双馈电机在转速低于同步转速时也能处于发电状态。

Operation control and space vector analysis on doubly fed wind power generator

In order to analyze the electromagnetic nature of AC excitation for doubly fed wind power generator(DFWPG),a method based on space vector theory is applied to set up the space vector model of the DFWPG.According to the space vector model of DFWPG,a whole model of pitch-controlled variable-speed WECS(wind energy conversion system) is set up and the simula-tion curves of different operation conditions are presented.By comparing the phase angle of stator and rotor MMF(Magnetic Motive Force) space vector of DFW...