利用预览风向信息进行尾流转向控制,提高功率增益

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
B.A.M. Sengers, A. Rott, E. Simley, M. Sinner, G. Steinfeld, Martin Kühn
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引用次数: 0

摘要

摘要偏航控制器通常依赖于在风力涡轮机上进行的测量,因此对风向变化的反应速度较慢,进而会因偏差造成功率损失。由于风向变化导致偏航错位角偏离预定角度,因此偏航动作延迟在尾流转向操作中问题尤为严重,会造成功率损失。本研究探讨了在风速处于部分负荷范围内的双涡轮机设置中使用预览风向信息进行尾流转向控制的问题。对于这些条件和简单的偏航控制器,工程模型的结果确定了 90 秒的最佳预览时间。通过在大涡流模拟模型中强制改变风向,对这些结果进行了验证。在风向变化较大的六组模拟中,尾流转向的平均功率增益从 0.44% 增加到 1.32%。在风向变化较小的第二组六次模拟中,尾流转向的平均功率增益从 1.24 % 增加到 1.85 %。与高频波动相比,低频波动对尾流转向性能和预览控制效果的影响更大。从这些结果中可以得出结论,预览风向控制对尾流转向的益处是巨大的,因此值得在今后的工作中继续研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Increased power gains from wake steering control using preview wind direction information
Abstract. Yaw controllers typically rely on measurements taken at the wind turbine, resulting in a slow reaction to wind direction changes and subsequent power losses due to misalignments. Delayed yaw action is especially problematic in wake steering operation because it can result in power losses when the yaw misalignment angle deviates from the intended one due to a changing wind direction. This study explores the use of preview wind direction information for wake steering control in a two-turbine setup with a wind speed in the partial load range. For these conditions and a simple yaw controller, results from an engineering model identify an optimum preview time of 90 s. These results are validated by forcing wind direction changes in a large-eddy simulation model. For a set of six simulations with large wind direction changes, the average power gain from wake steering increases from only 0.44 % to 1.32 %. For a second set of six simulations with smaller wind direction changes, the average power gain from wake steering increases from 1.24 % to 1.85 %. Low-frequency fluctuations are shown to have a larger impact on the performance of wake steering and the effectiveness of preview control, in particular, than high-frequency fluctuations. From these results, it is concluded that the benefit of preview wind direction control for wake steering is substantial, making it a topic worth pursuing in future work.
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来源期刊
Wind Energy Science
Wind Energy Science GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY-
CiteScore
6.90
自引率
27.50%
发文量
115
审稿时长
28 weeks
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