基于 FAST和现代控制理论的大型风力发电机载荷控制研究

摘要

Considering of reducing wind turbines’dynamic loads,the 1.5 MW horizontal axis wind turbines whole system param-eter identification was discussed in the state space model conditions. Based on the mechanism of wind turbines and wind turbine dy-namics simulation software FAST’s assumed mode method,mechanistic model of the whole system was derived at a given operating point combining with linearization method and MATLAB software. Using rotor unified pitch control to adjust the area above the rated speed,applying status assessment method,the simulation results about three-state model and five-state model were gotten and ana-lyzed. It is shown the superiority of five-state model in load control.%考虑到减少风力发电机组动态载荷，在状态空间模型条件下，讨论1.5 MW水平轴风力发电机整机系统的参数识别。基于风力发电机动力学仿真代码FAST的假设模态法，推导出整机的机制模型，结合MATLAB软件用线性化的方法得到系统在某一工况点的状态方程。采用叶轮统一变桨控制方法来调节额定转速以上区域的叶轮转速，应用状态评估的方法对3阶和5阶模型进行仿真并对结果进行分析，得到5阶模型在载荷控制方面的优越性。