基于模糊Smith预估的直驱风电机组变桨距控制器研究

在大型直驱风电机组中通常采用变桨距的方法来提高风能利用率，调节发电机组的有功功率。但由于风速变化的随机性和风力发电机组的非线性特点，传统的PID控制算法并不能取得令人满意的效果，为此提出了模糊Smith预估控制方法。在模糊理论和Smith预估控制理论的基础上，分别对模糊控制器和Smith预估控制器进行设计，最后将两者相结合，并在Simulink平台上搭建了模型，进行了仿真。仿真结果表明，所提方法在风速变化超过额定风速的情况下，能够通过控制桨距角使风力机转速稳定在额定值，实现直驱风电机组的恒功率控制。

Pitch control of direct drive wind turbine based on the fuzzy Smith predictor

In the large-scale direct drive wind turbine, it usually changes the pitch to improve the utilization of wind energy and adjust the active power of generators. However, as the randomness of the wind speed and the nonlinear characteristic of the wind turbines, the traditional PID control algorithm can not obtain satisfactory results. For this reason, a fuzzy Smith predictor control method is proposed. Based on the fuzzy theory and Smith predictive control theory, the fuzzy controller and Smith predictor controller is designed, finally the both are combined, the model is set up by Simulink, and the simulation verification is performed. Results of simulation show that when the wind speed exceeds the rated wind speed, the proposed method can make the fan speed stable in ratings by controlling the pitch angle and achieve the constant power control of direct drive wind turbine.