Wind vane correction during yaw misalignment for horizontal-axis wind turbines

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Wind Energy Science Pub Date : 2023-11-23 DOI:10.5194/wes-8-1755-2023
A. Rott, Leo Höning, Paul Hulsman, L. J. Lukassen, Christof Moldenhauer, Martin Kühn
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Abstract

Abstract. This paper investigates the accuracy of wind direction measurements for horizontal-axis wind turbines and their impact on yaw control. The yaw controller is crucial for aligning the rotor with the wind direction and optimizing energy extraction. Wind direction is conventionally measured by one or two wind vanes located on the nacelle, but the proximity of the rotor can interfere with these measurements. The authors show that the conventional corrections, including low-pass filters and calibrated offset correction, are inadequate to correct a systematic overestimation of the wind direction deviation caused by the rotor misalignment. This measurement error can lead to an overcorrection of the yaw controller and, thus, to an oscillating yaw behaviour, even if the wind direction is relatively steady. The authors present a theoretical basis and methods for quantifying the wind vane measurement error and validate their findings using computational fluid dynamics simulations and operational data from two commercial wind turbines. Additionally, the authors propose a correction function that improves the wind vane measurements and demonstrate its effectiveness in two free-field experiments. Overall, the paper provides new insights into the accuracy of wind direction measurements and proposes solutions to improve the yaw control for horizontal-axis wind turbines.
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水平轴风力涡轮机偏航失准时的风叶校正
摘要本文研究了水平轴风力涡轮机的风向测量精度及其对偏航控制的影响。偏航控制器对于使转子对准风向并优化能量提取至关重要。风向通常由位于机舱上的一个或两个风向叶片测量,但转子的靠近会干扰这些测量。作者的研究表明,传统的校正方法,包括低通滤波器和校准偏移校正,不足以校正转子错位造成的系统性高估风向偏差。即使风向相对稳定,这种测量误差也会导致偏航控制器的过度修正,从而产生偏航振荡行为。作者提出了量化风向标测量误差的理论基础和方法,并使用计算流体动力学模拟和两台商用风力涡轮机的运行数据验证了他们的研究结果。此外,作者还提出了一种可改善风向标测量的修正函数,并在两个自由场实验中证明了其有效性。总之,本文为风向测量的准确性提供了新的见解,并提出了改进水平轴风力涡轮机偏航控制的解决方案。
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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
期刊最新文献
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