Analysis and synthesis of sliding mode control for large scale variable speed wind turbine for power optimization
Analysis and synthesis of sliding mode control for large scale variable speed wind turbine for power optimization
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DOI：
10.1016/j.renene.2014.06.030
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发表时间：
2014-11
期刊：
影响因子：
8.7
通讯作者：
Jovan O. Merida;L. Aguilar;J. Dávila
中科院分区：
文献类型：
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作者：
Jovan O. Merida;L. Aguilar;J. Dávila
针对变速风力发电机组在低于额定风速条件下的非线性反馈控制问题，提出了一种基于非线性反馈控制的风力发电机组控制方法。目的是操作风力涡轮机，以便具有最大的风力提取，同时还降低机械负载。提出了两种控制策略，以寻求更好的性能。第一种策略使用跟踪控制器，以确保转子的最佳角速度。第二种策略使用最大功率点跟踪（MPPT）算法，同时应用非齐次准连续高阶滑模控制器来确保功率跟踪。针对第一种策略，提出了两种算法来解决跟踪控制问题。第一种是结合风速估计器的滑模输出反馈转矩控制器。第二种算法是准连续高阶滑模控制器，保证速度跟踪。所提出的控制器与现有的控制策略进行了比较，并使用基于控制高级研究涡轮机（CART）的FAST模型验证其性能。该控制器在能量提取和负载减少方面表现出良好的性能。
The problem of designing a nonlinear feedback control scheme for variable speed wind turbines, without wind speed measurements, in below rated wind conditions was addressed. The objective is to operate the wind turbines in order to have maximum wind power extraction while also the mechanical loads are reduced. Two control strategies were proposed seeking a better performance. The first strategy uses a tracking controller that ensures the optimal angular velocity for the rotor. The second strategy uses a Maximum Power Point Tracking (MPPT) algorithm while a non-homogeneous quasi-continuous high-order sliding mode controller is applied to ensure the power tracking. Two algorithms were developed to solve the tracking control problem for the first strategy. The first one is a sliding mode output feedback torque controller combined with a wind speed estimator. The second algorithm is a quasi-continuous high-order sliding mode controller to ensure the speed tracking. The proposed controllers are compared with existing control strategies and their performance is validated using a FAST model based on the Controls Advanced Research Turbine (CART). The controllers show a good performance in terms of energy extraction and load reduction.