风电机组运行在额定风速以上区域时,为保持输出功率稳定,降低塔架载荷,提出线性自抗扰变桨控制器。首先,基于自抗扰控制理论和风电机组动力学方程,建立离散线性状态误差反馈控制律及线性扩张状态观测器数学模型。其次,分别设计转速与塔架阻尼控制回路,并在Matlab中搭建变桨控制器模型;通过总扰动的整体辨识及补偿,改善机组控制性能。最后,利用高保真度风电机组模型在阶跃风、极端阵风、湍流风工况下仿真验证控制器性能。结果表明,该控制器在稳定功率输出的同时能进一步降低塔架载荷。
Abstract
When wind turbines operate in the region above the rated wind speed, the linear active disturbance rejection pitch controller is proposed to keep the output power stable and reduce tower loads. Firstly, based on the theory of active disturbance rejection control and dynamic equations of wind turbines, the discrete models of linear state error feedback and linear extended state observer are obtained. Secondly, the rotor speed control loop and the tower damping control loop are designed in Matlab to build the pitch controller model. Through the overall identification and compensation of total disturbances, the control performance can be improved. Finally, the high-fidelity wind turbine model is utilized to verify the performance of the controller under step wind, extreme gust, and turbulent wind conditions. Simulation results show that the proposed pitch controller can further reduce tower loads while stabilizing output power.
关键词
风电机组 /
功率控制 /
扰动抑制 /
塔架载荷 /
变桨控制 /
线性自抗扰控制
Key words
wind turbines /
power control /
disturbance rejection /
tower loads /
pitch control /
linear active disturbance rejection control
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参考文献
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基金
国家重点研发计划（2018YFB1501304）
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