Combined wind turbine fatigue and ultimate load reduction by individual blade control
Combined wind turbine fatigue and ultimate load reduction by individual blade control
复制标题
通过单独叶片控制将风力涡轮机疲劳和极限载荷降低结合起来
DOI：
10.1088/1742-6596/524/1/012062
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
W. Leithead
中科院分区：
文献类型：
--
作者：
Y. Han;W. Leithead
如果风力机的每个叶片都有单独的变桨距执行器，就有可能采用变桨距系统来通过先进的控制方法来减轻结构载荷。在此之前，单个叶片控制(IBC)已经显著降低了叶片的寿命当量疲劳载荷，此外，它在降低叶片极限载荷方面也显示出潜力。然而，疲劳和极限载荷都会影响风力机叶片的设计和寿命。本文研究了同时降低叶片疲劳和极限载荷的内燃机的设计和应用。首先探讨了叶片载荷谱分量1P、2P和横向振型对叶片面内和/或面外弯矩的贡献。比较了用于减少这些负载分量的各种组合的四种不同控制方案。针对疲劳荷载和极限荷载的不同频谱峰值，设计了控制器，使其能够作用于随风速变化的不同频率分量。通过对一台5 MW样机的仿真，对IBC控制器的疲劳性能和极限减载性能进行了评估。仿真结果表明，只要在不同的风速下选择适当的控制输入，采用单一的组合IBC就可以获得令人满意的疲劳载荷和极限载荷。
If each blade of the wind turbine has individual pitch actuator, there is possibility of employing the pitch system to mitigate structural loads through advanced control methods. Previously, considerable reduction of blade lifetime equivalent fatigue loads has been achieved by Individual Blade Control (IBC) and in addition, it has also been shown the potential in blade ultimate loads reduction. However, both fatigue and ultimate loads impact on the design and life of wind turbine blades. In this paper, the design and application of IBC that concurrently reduce both blade fatigue and ultimate loads is investigated. The contributions of blade load spectral components, which are 1P, 2P and edgewise mode from blade in-plane and/or out-of-plane bending moments, are firstly explored. Four different control options for reducing various combinations of these load components are compared. In response to the different spectral peaks of both fatigue and ultimate loads, the controller has been designed so that it can act on different frequency components which vary with wind speed. The performance of the IBC controller on fatigue and ultimate load reduction is assessed by simulating a 5MW exemplar wind turbine. Simulation results show that with a proper selection of controlling inputs at different wind speed, the use of a single combined IBC can achieve satisfactory reduction on both fatigue and ultimate loads.