Wind turbine integrated structural and LPV control design for improved closed-loop performance
Wind turbine integrated structural and LPV control design for improved closed-loop performance
复制标题
DOI：
10.1080/00207179.2012.679973
复制
发表时间：
2012-06
影响因子：
2.1
通讯作者：
F. A. Shirazi;K. Grigoriadis;D. Viassolo
中科院分区：
文献类型：
--
作者：
F. A. Shirazi;K. Grigoriadis;D. Viassolo
针对水平轴风力机涡轮机，提出了一种将结构参数设计与线性变参数控制器设计相结合的迭代再设计算法。LPV控制器是针对风力涡轮机的八阶集总模型设计的，该模型由叶片、传动系统和塔架组成。集总模型响应与使用疲劳、空气动力学、结构和湍流（FAST）代码的详细开环数值模拟相匹配。控制器基于平均风速实时调度，以考虑变化的系统动态。目标是跟踪运行轨迹，同时最小化从风湍流到受控输出矢量（包括桨距角、叶尖偏转以及发电机速度和扭矩）的H ∞性能指标。的闭环性能指标相对于系统的结构参数的灵敏度分析进行检查。该集成设计问题被表述为一个迭代的顺序控制器/结构重新设计，以获得对应于局部最优性能指标的结构参数和控制器矩阵。迭代过程的每一步被制定为一个线性矩阵不等式（LMI）优化问题，可以有效地解决使用现有的LMI求解器。阐述了通过一体化设计，结构参数和性能指标的演变。两个选定的设计的FAST闭环仿真与最小值的性能指标表明，提高了整个系统的性能，通过集成的结构/控制重新设计，最大限度地减少风力干扰的影响，发电机输出功率，并减少结构负载的风力涡轮机。
An iterative redesign algorithm is proposed to integrate the design of the structural parameters and a linear parameter-varying (LPV) controller for a three-bladed horizontal-axis wind turbine. The LPV controller is designed for an eighth-order lumped model of the wind turbine consisting of blades, drive-train and the tower. The lumped model response is matched with detailed open-loop numerical simulations using the Fatigue, Aerodynamics, Structures and Turbulence (FAST) code. The controller is scheduled in real-time based on the mean wind speed to account for the varying system dynamics. The objective is to track the operating trajectory meanwhile minimise the H ∞ performance index from the wind turbulence to the controlled output vector consisting of pitch angle, blade tip deflection, and the generator speed and torque. Sensitivity analysis of the closed-loop performance index with respect to the structural parameters of the system is examined. The integrated design problem is formulated as an iterative sequential controller/structure redesign to obtain the structural parameters and controller matrices corresponding to a local optimal performance index. Each step of the iterative procedure is formulated as a linear matrix inequality (LMI) optimisation problem that can be solved efficiently using available LMI solvers. The evolution of the structural parameters and performance index through the integrated design is illustrated. The FAST closed-loop simulations for two selected designs with the smallest values of the performance index demonstrate the improved performance of the overall system through the integrated structure/control redesign in both minimising the effect of the wind disturbance on the generator output power, and reducing the structural loads on the wind turbine.