Abstract Collective pitch control is the main tool used to regulate the speed and power of wind turbines while operating above their rated wind speeds. The main challenges that face collective pitch control designs are the constraints on the control actions, the unmodeled uncertainties, and the unmeasured system states. A tube – based explicit model-predictive output-feedback controller is designed to control the collective pitch angle. The proposed controller is capable of handling the constraints challenge, reducing the on-line computational time and producing the optimal control sequence. Furthermore, the proposed controller is robust against the unmodeled uncertainties. The challenge of unmeasured system states is eliminated since this is an output feedback controller. The performance of the proposed controller is compared to the performance of a gain-scheduled PI controller which is commonly adopted in industry. Simulation results through application to a typical 5-MW offshore wind turbine are obtained. Further, experimental results with hardware in loop are obtained for a reduced scale wind turbine model to demonstrate the feasibility of the controller for real time applications. Simulation and experimental results show the superiority of the proposed controller over the gain-scheduled PI controller.

中文翻译：

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用于风力涡轮机集体变桨距的基于管的显式模型预测输出反馈控制器

摘要 集体变桨距控制是用于调节风力发电机在高于额定风速运行时的速度和功率的主要工具。集体变桨控制设计面临的主要挑战是控制动作的约束、未建模的不确定性和未测量的系统状态。基于管的显式模型预测输出反馈控制器旨在控制总距角。所提出的控制器能够处理约束挑战，减少在线计算时间并产生最佳控制序列。此外，所提出的控制器对未建模的不确定性具有鲁棒性。由于这是一个输出反馈控制器，因此消除了未测量系统状态的挑战。将所提出的控制器的性能与工业中普遍采用的增益调度 PI 控制器的性能进行比较。通过应用于典型的 5 兆瓦海上风力涡轮机获得了仿真结果。此外，通过硬件在环中获得的实验结果用于缩小规模的风力涡轮机模型，以证明控制器在实时应用中的可行性。仿真和实验结果表明所提出的控制器优于增益调度 PI 控制器。使用硬件在环中获得的实验结果用于缩小规模的风力涡轮机模型，以证明控制器在实时应用中的可行性。仿真和实验结果表明所提出的控制器优于增益调度 PI 控制器。使用硬件在环中获得的实验结果用于缩小规模的风力涡轮机模型，以证明控制器在实时应用中的可行性。仿真和实验结果表明所提出的控制器优于增益调度 PI 控制器。