基于直流发电机的风力发电系统及其控制策略

Research on wind power generation system based on DC generator and its control strategy

针对风力发电系统的特点,结合直流发电机的特性,提出了基于直流发电机的风力发电系统.从理论上分析了该系统的可行性及其优点,重点对其控制策略进行研究,在动模实验室内建立基于直流发电机的风力发电系统的模拟系统,以直流电动机作原动机,调节直流电动机的转速,模拟风速变化引起的风力机转速的变化,并通过试验验证了该系统的可行性.

DC generator is convenient in voltage regulation. It can stabilize the output voltage by regulating the field current while the rotational speed of the generator varies in a certain range. Therefore, DC generator is especially suitable for wind power generation system with frequent speed fluctuation. In consideration of the characteristics of wind power system and DC generator, a wind power generation system based on DC generator was developed, and the feasibility and advantage of the system were analyzed theoretically, with emphasis placed on its control strategy. Then, a simulative system of wind power generation system based on DC generator was built in the power system dynamic simulative laboratory. With DC motor taken as the prime mover, the variation of rotational speed of wind generator induced by variation of wind speed was simulated by regulation of the rotational speed of DC motor, and the feasibility of the system was verified by elaborate experiments.