A novel hybrid control strategy of wind turbine wakes in tandem configuration to improve power production
A novel hybrid control strategy of wind turbine wakes in tandem configuration to improve power production
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DOI：
10.1016/j.enconman.2022.115575
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发表时间：
2022-05
影响因子：
10.4
通讯作者：
M. E. Nakhchi;S. Win Naung;M. Rahmati
中科院分区：
文献类型：
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作者：
M. E. Nakhchi;S. Win Naung;M. Rahmati
在上游涡轮机尾流区域运行的风力涡轮机产生的功率较少，并且可能因高度不稳定的流动而遭受严重的结构问题，这会降低涡轮机的预期寿命。在本研究中，提出了一种基于高精度大涡模拟与致动器线方法相结合的新型风电场发电增强混合尾流控制策略。偏航角和倾斜角控制方法对风电场布局中下游风机性能改善的综合影响尚未得到研究。这项工作将是评估串联风力涡轮机混合尾流控制策略的首次尝试。研究发现，倾斜角越小，涡流产生越强，因为转子的更多部分受到上游风力机尾流的影响。还提供了优化分析，以找到上游涡轮机的最佳尾流偏转角度，从而最大限度地提高发电量。结果表明，同时控制偏航角（θ= 30 o）和倾斜角（φ= 24 o），累计发电增量为17.1%。本研究中获得的功率比以前的尾流控制技术高出约 6.1%。通过采用混合控制策略，年发电量提高了3.7%，高于之前的尾流控制风电场布局。
The wind turbines that operate in the wake region of the upstream turbines produce less power and may suffer serious structural issues due to highly unsteady flows, which can reduce the life expectancy of the turbines. In this study, a novel hybrid wake control strategy for the wind farm power generation enhancement is proposed, which is based on highly accurate large eddy simulations coupled with the actuator line method. The combined effects of yaw angle and tilt angle control methods on the performance improvement of downstream wind turbines in wind farm layouts have not yet been investigated. This work would be the first attempt to evaluate the hybrid wake-control strategy of tandem wind turbines. It is found that the vortex generation is stronger at lower tilt angles because more parts of the rotor are affected by the wakes of the upstream wind turbine. An optimisation analysis is also provided to find the optimum wake deflection angles of the upstream turbine to maximize the electrical power generation. The results show that an accumulative power production increment of 17.1% is achieved by controlling both yaw angle (θ= 30 o), and tilt angle (φ= 24 o). The power obtained in the present study is approximately 6.1% higher than previous wake control techniques. By using the hybrid control strategy, an annual energy production enhancement of 3.7% is achieved, which is higher than the previous wake-controlled wind farm layouts.