设计了一种变桨距线性自抗扰控制器,估计和补偿了系统未建模部分和外界干扰,实现额定风速以上时系统输出功率稳定于额定值;并采用模型补偿方法对自抗扰控制器进行优化,减少了参数整定的数目,提高了系统控制精度。对额定功率为300 kW的风电机组分别在阶跃风、阵风以及湍流风作用下进行系统仿真。结果表明,该方法可以快速调节风速变化引起的输出波动,使得系统输出稳定且超调量小,具有很好的稳定性和鲁棒性。

A linear active disturbance rejection controller (LADRC) was designed to estimate the system unmodeled part and compensate the interference, thereby achieve output power stable when wind speed was above rated wind speed. And the model compensation method was used to optimize the LADRC, to reduce the number of parameters that need to be set and improve system control accuracy. The controller was simulated in three different wind conditions in the 300 kW wind turbines. The simulation results showed that it can quickly adjust the output fluctuation caused by wind velocity variation, made the system output stable and had small overshoot in any wind speed stage. Moreover, the system had good stability and robustness.

TM 315

国家自然科学基金项目(61573250)