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Ars Investigation of Wind-shear Models and Experimental Data Trends for Different Terrains

机译:不同地形风切变模型和实验数据趋势的Ars研究

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摘要

The importance of characterizing the wind-shear at a given site for a utility-scale wind turbine cannot be overemphasized. Such characterization is needed for an accurate prediction of its power output. Thus, the objective of this work based on the use of several US tall tower wind data sets was to determine the accuracies of different wind-shear enumeration methods, especially when used at sites having hills and/or forests. In addition, average wind-shear variations with respect seasonal and annual effects and data length are presented for various long data sets, recorded to between 1995 and 2005. Wind direction and atmospheric stability were not a factor in the analysis. At some of the sites the greatest average wind-shear was found during the summer. For the site with the most complex terrain, the average annual all-direction wind-shear varied by up to 7% between different years; this was partly due to year-to-year variations of the direction distribution. There was found to be no significant difference between the performance of the log and power laws; using either may give inaccurate predictions of hub-height mean wind speeds.
机译:对于公用事业规模的风力涡轮机,在给定位置表征风切变的重要性不可过分强调。这种表征对于准确预测其功率输出是必需的。因此,基于使用多个美国高塔风数据集的这项工作的目的是确定不同风切变枚举方法的准确性,尤其是在具有丘陵和/或森林的地点使用时。此外,还列出了各种长数据集的平均风切变随季节和年度影响以及数据长度的变化,记录了1995年至2005年之间的数据。风向和大气稳定性不是分析的因素。在某些地点,夏季平均风切变最大。对于地形最复杂的站点,不同年份之间的年平均全方位风切变相差高达7%;部分原因是方向分布逐年变化。发现对数和幂律的性能之间没有显着差异。使用任何一个都可能无法准确预测轮毂高度的平均风速。

著录项

  • 来源
    《Wind Engineering》 |2006年第4期|p. 341-350|共10页
  • 作者单位

    University of Massachusetts, Department of Mechanical & Industrial Engineering Renewable Energy Research Laboratory Amherst,MAOIOO3 USA;

    University of Massachusetts, Department of Mechanical & Industrial Engineering Renewable Energy Research Laboratory Amherst,MAOIOO3 USA;

    University of Massachusetts, Department of Mechanical & Industrial Engineering Renewable Energy Research Laboratory Amherst,MAOIOO3 USA;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 风能、风力机械;
  • 关键词

  • 入库时间 2022-08-18 00:26:10

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