Second-Order Sliding Mode Control of a Doubly Fed Induction Generator Driven Wind Turbine
Second-Order Sliding Mode Control of a Doubly Fed Induction Generator Driven Wind Turbine
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DOI：
10.1109/tec.2011.2181515
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发表时间：
2012-06-01
影响因子：
4.9
通讯作者：
Ahmed-Ali, Tarek
中科院分区：
文献类型：
--
作者：
Beltran, Brice;Benbouzid, Mohamed El Hachemi;Ahmed-Ali, Tarek
本文讨论基于双馈感应发电机 (DFIG) 的风力涡轮机的功率提取最大化。与传统风力涡轮机运行方法相比，这些变速系统具有多个优点，例如减少机械应力和增加能量捕获。为了充分利用这一最新优势，许多控制方案已被开发用于最大功率点跟踪 (MPPT) 控制方案。在此背景下，本文根据MPPT给出的参考文献提出了一种二阶滑模来控制风力发电机双馈电机。传统上，所需的 DFIG 扭矩是使用控制电流来跟踪的。然而，用于定义电流参考的估计会导致一些不准确，主要导致非最佳功率提取。因此，使用鲁棒控制（例如二阶滑模）将允许直接跟踪 DFIG 扭矩，从而实现最大功率提取。此外，所提出的控制策略具有吸引人的特征，例如无颤振行为（无额外机械应力）、有限到达时间以及对外部干扰（电网）和未建模动态（发电机和涡轮机）的鲁棒性。使用风力涡轮机模拟器 FAST 进行仿真并在 7.5 kW 实时模拟器上进行实验，以验证所提出的高阶滑模控制方法。
This paper deals with power extraction maximization of a doubly fed induction generator (DFIG)-based wind turbine. These variable speed systems have several advantages over the traditional wind turbine operating methods, such as the reduction of the mechanical stress and an increase in the energy capture. To fully exploit this latest advantage, many control schemes have been developed for maximum power point tracking (MPPT) control schemes. In this context, this paper proposes a second-order sliding mode to control the wind turbine DFIG according to references given by an MPPT. Traditionally, the desired DFIG torque is tracked using control currents. However, the estimations used to define current references drive some inaccuracies mainly leading to nonoptimal power extraction. Therefore, using robust control, such as the second-order sliding mode, will allow one to directly track the DFIG torque leading to maximum power extraction. Moreover, the proposed control strategy presents attractive features such as chattering-free behavior (no extra mechanical stress), finite reaching time, and robustness with respect to external disturbances (grid) and unmodeled dynamics (generator and turbine). Simulations using the wind turbine simulator FAST and experiments on a 7.5-kW real-time simulator are carried out for the validation of the proposed high-order sliding mode control approach.