主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2022, Vol. 38 ›› Issue (5): 106-112.doi: 10.3969/j.issn.1673-503X.2022.05.013

• 快报 • 上一篇    

基于不同时间尺度风切变指数推算风资源的对比分析

徐红1(),龚强1,*(),朱玲1,沈历都2,顾正强1,晁华1,王乙舒1,陈军庆3   

  1. 1. 沈阳区域气候中心, 辽宁沈阳 110166
    2. 中国科学院沈阳应用生态研究所, 辽宁沈阳 110016
    3. 空军93161部队, 辽宁沈阳 110015
  • 收稿日期:2021-02-20 出版日期:2022-10-28 发布日期:2022-11-04
  • 通讯作者: 龚强 E-mail:lnqxny@163.com;isgq@sina.com
  • 作者简介:徐红, 女, 1986年生, 工程师, 主要从事气候资源开发与利用研究, E-mail: lnqxny@163.com
  • 基金资助:
    国家重点研发计划项目(2018YFB1501100);辽宁省风能资源详查和评价项目以及辽宁省气象局科研项目(BA202002)

Comparisons of wind resources based on wind shear indices at various temporal scales

Hong XU1(),Qiang GONG1,*(),Ling ZHU1,Li-du SHEN2,Zheng-qiang GU1,Hua CHAO1,Yi-shu WANG1,Jun-qing CHEN3   

  1. 1. Shenyang Regional Climate Center, Shenyang 110166, China
    2. Institute of Applied Ecology, Academy of Chinese Science, Shenyang 110016, China
    3. Air Force 93161 Troops, Shenyang 110015, China
  • Received:2021-02-20 Online:2022-10-28 Published:2022-11-04
  • Contact: Qiang GONG E-mail:lnqxny@163.com;isgq@sina.com

摘要:

利用2014—2018年辽宁省探空资料分析了水平风速的垂直风廓线分布特征。用2座代表性测风塔逐时梯度风观测分析了采用不同高度组合方案计算出风切变指数的月、日变化特征, 分别用月、小时、年风切变指数推算高层风速和风功率密度, 并与实测对比。结果表明: 沈阳相较于大连地区风速随高度增加较快, 180 m高度以上风速基本保持不变, 而大连因其纬度低且靠近海洋, 300 m以下风速均匀上升。在非复杂地形情况下, 距地面10 m高度以上间隔一定高度设立4层风观测, 基本可以满足近地层风资源评估需求。受太阳辐射、下垫面、海陆热力性质差异等影响, 辽宁省风切变指数日变化特征比月变化更显著。利用小时风切变指数推算高层风速和风功率密度的方案优于采用月、年风切变指数方案。风切变指数日变化越显著, 采用逐时风切变指数推算方案越优于其他计算方案。

关键词: 风能资源, 近地层, 探空站, 风切变指数

Abstract:

Using sounding data from 2014 to 2018 in Liaoning province, the vertical wind profile variations in average horizontal wind speed were analyzed.Monthly and diurnal variations in the wind shear index of different height combinations were analyzed based on hourly gradient wind observation of two representative wind measuring towers.Wind speed and wind power at the upper tower were calculated by monthly, hourly, and annual wind shear indexes, respectively, which were then compared with observations.The results show that compared with Dalian, the wind speed in Shenyang increases more significantly with height, and the wind speed above 180 m remains constant, whereas the wind speed below 300 m rises uniformly in Dalian due to its low latitude and proximity to the ocean.Since the terrain is not complex enough, four layers of wind observation are set up at a certain height above 10 m from the ground, which are suitable for surface wind resource assessment.Influenced by solar radiation, underlying surface and thermal property discrepancies between sea and land, the diurnal variations of wind shear index in Liaoning province appear more significant than those of the monthly variations.Hourly wind shear index is superior to monthly and annual wind shear index in calculating wind speed and wind power at the upper tower.The more significant the diurnal variation of the wind shear index is, the better the calculation scheme using the hourly wind shear index appears compared with other calculation schemes.

Key words: Wind power resources, Near-surface layer, Sounding observatory, Wind shear index

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