变速恒频双馈风力发电功率偏差控制技术研究

Study on Power Error Control for Variable-speed Constant-frequency Double-fed Wind-power Generator

变速恒频双馈风力发电系统是通过调节转子绕组励磁电流的频率、幅值、相位和相序来实现变速恒频控制的。在分析交流励磁变速恒频双馈发电原理及双馈电机数学模型的基础上,阐述了一种新颖的基于定子磁场定向的变速恒频双馈风力发电系统功率偏差控制策略,并在实验室3 kW变速恒频双馈风力发电系统模拟系统上进行了实验研究,实验结果表明了该算法的有效性。

The control of variable speed constant frequency （VSCF） doubly fed wind power generation system is implemented by controlling the frequency, amplitude, phase angle and sequence of rotor winding currents. A novel power error control strategy for VSCF double-fed wind-power generation system of stator flux oriented was presented, based on the analysis of the double-fed induction generator （DFIG） mode and the operation principle of VSCF double-fed wind-power generation system. This strategy is studied on a simulation test system of 3 kW VSCF double-fed wind-power generation system by the laboratory, and showed validity.