利用安装在旋转器上的单光束激光雷达对 15 兆瓦风力涡轮机进行前馈变桨控制

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Wei Fu, F. Guo, D. Schlipf, Alfredo Peña
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引用次数: 1

摘要

摘要前馈叶片俯仰控制是最有前途的激光雷达辅助控制策略之一,因为它能显著改善转子速度调节并降低疲劳载荷。高质量地预览转子有效风速是控制效益的关键因素。在这项工作中,模拟了一个单光束激光雷达在底部固定的 IEA 15 兆瓦风力涡轮机旋转器中的应用。连续波(CW)和脉冲激光雷达系统均在考虑之列。单波束激光雷达可随风力涡轮机转子旋转,并以圆形模式扫描流入的风流,从而以较低的成本模拟了多波束机舱激光雷达。此外,基于旋转翼的激光雷达可以不受阻碍地观察流入的气流,而不会受到旋转叶片的间歇性阻挡。基于转子效应风速一致性模型,对基于旋转翼的单光束激光雷达的聚焦距离和锥角进行了优化,以获得最佳的风预览质量。然后,在带有嵌入式激光雷达模拟器和虚拟四维曼氏湍流场(考虑到风的演变)的 OpenFAST 中,对高于额定风速的情况下使用优化后的旋转翼激光雷达的控制优势进行了评估。结果与使用单光束机舱式激光雷达的结果进行了比较。我们发现,基于 CW 和脉冲旋转器的单光束激光雷达的最佳扫描配置可使激光雷达的扫描半径达到转子半径的 0.6。此外,结果表明,与安装在机舱内的激光雷达相比,安装在旋转器内的单光束激光雷达能提供更多的控制优势(即更好地调节转子速度,更大程度地降低塔基和叶片根部的损伤当量载荷)。当用于前馈控制时,基于旋翼的单光束激光雷达与四光束短舱激光雷达具有相似的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Feedforward pitch control for a 15 MW wind turbine using a spinner-mounted single-beam lidar
Abstract. Feedforward blade pitch control is one of the most promising lidar-assisted control strategies due to its significant improvement in rotor speed regulation and fatigue load reduction. A high-quality preview of the rotor-effective wind speed is a key element of control benefits. In this work, a single-beam lidar is simulated in the spinner of a bottom-fixed IEA 15 MW wind turbine. Both continuous-wave (CW) and pulsed lidar systems are considered. The single-beam lidar can rotate with the wind turbine rotor and scan the inflow with a circular pattern, which mimics a multiple-beam nacelle lidar at a lower cost. Also, the spinner-based lidar has an unimpeded view of the inflow without intermittent blockage from the rotating blade. The focus distance and the cone angle of the spinner-based single-beam lidar are optimized for the best wind preview quality based on a rotor-effective wind speed coherence model. Then, the control benefits of using the optimized spinner-based lidar are evaluated for an above-rated wind speed in OpenFAST with an embedded lidar simulator and virtual four-dimensional Mann turbulence fields considering the wind evolution. Results are compared against those using a single-beam nacelle-based lidar. We found that the optimum scanning configurations of both CW and pulsed spinner-based single-beam lidars lead to a lidar scan radius of 0.6 of the rotor radius. Also, results show that a single-beam lidar mounted in the spinner provides many more control benefits (i.e. better rotor speed regulations and higher reductions in the damage equivalent loads on the tower base and blade roots) than the one based on the nacelle. The spinner-based single-beam lidar has a similar performance to a four-beam nacelle lidar when used for feedforward control.
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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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