直驱风力发电控制系统的研究

Research on Control Method of Direct-drive Wind Power Generation System

对直驱永磁同步发电机的最大功率追踪算法进行了仿真研究，依据灰色理论，利用动态GM（1，1）模型进行预测，当预测达到最大功率点附近时，以实测数据为基础，用最小二乘法进行拟合，计算出最大功率点，并给出其与实际最大功率点的相对误差，以及不同风速下相对误差的变化趋势．使用Matlab仿真结果验证了该控制方案能很好地跟踪风力发电机输出最大功率点，具有风能利用效率高和工作稳定可靠的优点．

This article makes a simulating study on the wind power system based on the direct drive PM synchronous generator and it＇ s maximum power point tracking （MPPT） method. According to the grey system, GM（ 1, 1 ） model is used to predict the dynamic process of the complex system. When it is near the maximum power point, the least square method is used to evaluate the experimental data, then calculate the point, and give the maximum relative error between the evaluated value and the experimental data. The results testify the variable speed system＇ s good traits of capturing more power and system reliability.