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Study on active disturbance rejection control with actuator saturation to reduce the load of a driving chain in wind turbines
Renewable Energy ( IF 8.7 ) Pub Date : 2019-04-01 , DOI: 10.1016/j.renene.2018.10.041
Lina Ren , Chenhong Mao , Zeyu Song , Fucai Liu

Abstract In this study, nonlinear uncertainty and actuator saturation characteristics are investigated with respect to the issue of reducing the load of a wind turbine drive train. A method of active disturbance rejection control (ADRC) with actuator saturation is proposed to reduce the load on a wind turbine drive chain when the wind speed is below the rated wind speed. A tracking differentiator is designed to arrange the transient process for the error of the torsional vibration angle of the control system. An extended state observer (ESO) is used to estimate the strong non-linearity and “unknown disturbance”, and this is compensated by a linear controller in real time. The actuator saturation is applied to prevent over-saturation of the actuator (generator) and thereby to protect the complete system. Both convergence of the extended state observer and stabilization of the closed-loop system are discussed in this article. Finally, simulation results are detailed to demonstrate the effectiveness and robustness of the proposed control method.

中文翻译:

带致动器饱和的自抗扰控制降低风电机组传动链负载的研究

摘要 在这项研究中,针对降低风力涡轮机传动系统负载的问题,研究了非线性不确定性和执行器饱和特性。当风速低于额定风速时,提出了一种具有致动器饱和的自抗扰控制(ADRC)方法以减少风力涡轮机驱动链上的负载。设计了跟踪微分器来安排控制系统扭振角误差的瞬态过程。扩展状态观测器 (ESO) 用于估计强非线性和“未知干扰”,并由线性控制器实时补偿。执行器饱和用于防止执行器(发电机)过饱和,从而保护整个系统。本文讨论了扩展状态观测器的收敛性和闭环系统的稳定性。最后,详细的仿真结果证明了所提出的控制方法的有效性和鲁棒性。
更新日期:2019-04-01
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