Aerodynamic load control in horizontal axis wind turbines with combined aeroelastic tailoring and trailing‐edge flaps
Aerodynamic load control in horizontal axis wind turbines with combined aeroelastic tailoring and trailing‐edge flaps
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DOI：
10.1002/we.1830
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发表时间：
2016-02
期刊：
影响因子：
4.1
通讯作者：
B. Ng;R. Palacios;E. Kerrigan;J. Graham;H. Hesse
中科院分区：
文献类型：
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作者：
B. Ng;R. Palacios;E. Kerrigan;J. Graham;H. Hesse
本文提出了一种气动伺服弹性建模方法，用于研究具有复合材料叶片和后缘气动表面的大型风力涡轮机的动态载荷减轻。塔架和旋转叶片使用几何非线性复合梁进行建模，并针对具有潜在任意大结构位移的参考旋转条件进行线性化。使用线性化非定常涡晶格方法表示转子的空气动力学，并将所得气动弹性系统写入状态空间描述中，这既便于模型简化和控制设计。然后使用单个叶片的线性模型来设计 ℋ∞ 调节器，能够在完整风力涡轮机非线性气动弹性模型的闭环中提供高达 13% 的负载减少。当与通过气动弹性剪裁的被动负载减轻相结合时，动态负载可进一步减少至 35%。虽然单独使用主动襟翼控制和被动减载机制已得到充分研究，但涉及这两种机制的集成方法尚未得到充分探索，这也是本文的重点。最后，还考虑了利用扭转刚度来减轻涡轮叶片主动载荷的可能性。版权所有 © 2014 约翰·威利父子有限公司
This paper presents an aeroservoelastic modeling approach to investigate dynamic load alleviation in large wind turbines with composite blades and trailing-edge aerodynamic surfaces. The tower and rotating blades are modeled using geometrically non-linear composite beams and linearized about reference rotating conditions with potentially arbitrarily large structural displacements. The aerodynamics of the rotor are represented using a linearized unsteady vortex lattice method, and the resulting aeroelastic system is written in a state-space description that is both convenient for model reductions and control design. A linear model of a single blade is then used to design an ℋ∞ regulator, capable of providing load reductions of up to 13% in closed loop on the full wind turbine non-linear aeroelastic model. When combined with passive load alleviation through aeroelastic tailoring, dynamic loads can be further reduced to 35%. While the separate use of active flap controls and passive mechanisms for load alleviation has been well-studied, an integrated approach involving the two mechanisms has yet to be fully explored and is the focus of this paper. Finally, the possibility of exploiting torsional stiffness for active load alleviation on turbine blades is also considered. Copyright © 2014 John Wiley & Sons, Ltd.