永磁直驱风机最大功率跟踪模糊控制的仿真研究

对永磁直驱风力发电机的数学模型进行了推导,通过坐标变换得到了其在旋转坐标系下的数学模型,对机侧实现最大功率跟踪的控制策略进行了论述.由于风速的随机性、不确定性,若采用传统的PI控制,仅一组固定的参数在不同风速下难以达到较好的控制效果.为了提高风力发电机的动态性能,通过分析风力发电系统各参数之间的关系,设计了模糊自适应PID控制器,以叶尖速比的偏差及其变化为输入对象,以交轴电流为输出对象,使风力机能够实现最大功率跟踪,其控制效果优于传统的PI控制策略.

Simulation Study on the Fuzzy Control of Maximum Power Tracking of D-PMSG

The mathematical model of D-PMSG was deduced detailed. Based on coordinates transform, the mathematic model in two-phase synchronization coordinates was reasoned out, then maximum power tracking control strategy is discussed on the machine side. As the wind speed is stochastic and uncertain, a set of PI parameters can hardly achieve satisfactory control performance for the wind generator speed. In order to improve the dynamic performance of the wind turbine, through exploring the relationships among the parameters of the wind power generation system, this paper presents the design of a fuzzy adaptive PID controller. Through taking the error and the movement of the tip velocity ratio as the input options, while the axis current as the output option, wind turbine has achieved the maximum power point tracking compared with the traditional PI controller.