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| 大规模风电场建成后对风能资源影响的研究 | |
| 引用本文： | 刘磊,高晓清,陈伯龙,汪宁渤.大规模风电场建成后对风能资源影响的研究[J].高原气象,2012,31(4):1139-1144. |
| 作者姓名： | 刘磊 高晓清 陈伯龙 汪宁渤 |
| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程和气候变化重点实验室,甘肃兰州730000 中国科学院研究生院,北京100049 2. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程和气候变化重点实验室,甘肃兰州,730000 3. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程和气候变化重点实验室,甘肃兰州730000 兰州大学大气科学学院,甘肃兰州730000 4. 甘肃省电力公司风电技术中心,甘肃兰州,730070 |
| 基金项目： | 中国科学院“西部之光”联合学者项目，中国科学院寒区旱区环境与工程研究所创新项目 |
| 摘 要： | 考虑了千万千瓦级风电基地建成后风电机群对近地面层风速的影响,采用Frandsen研究了大规模风电场内部风速损失时所使用的方法,在内边界层已经充分发展成新边界层的区域内,对轮毂高度65m处风速Uh进行了计算。结果表明,风电场建成后研究区内,风速Uh与未建场时的65m风速U0相比变小,存在风速损失,该风速损失随着U0的增大而减小,与风电机的推力系数CT性质有关;大规模风电场建成后,Uh在3～20m.s-1范围内的平均风功率密度与未建场时U0在此范围内的平均风功率密度相比损失约为58.45%,这与建场地区建场前65m处风速值大小以及各风速值出现的概率有关。 |
| 关 键 词： | 风电场 地表粗糙度 对数风廓线 推力系数 |
Preliminary Estimates of Wind Energy Resources Deficit in Large Wind Farm |
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| LIU Lei,-,GAO Xiao-qing,CHEN Bo-long,WANG Ning-bo.Preliminary Estimates of Wind Energy Resources Deficit in Large Wind Farm[J].Plateau Meteorology,2012,31(4):1139-1144. | |
| Authors: | LIU Lei - GAO Xiao-qing CHEN Bo-long WANG Ning-bo |
| Institution: | 1.Key Laboratory for Land Process and Climate Change in Cold and Arid Regions,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China; 2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China; 3.School of Atmospheric Science,Lanzhou University,Lanzhou 730000,China; 4.Wind Power Technology Center,Gansu Electric Power Corporation,Lanzhou 730070,China) |
| Abstract: | The assessment of wind energy resource plays a fundamental role in its exploitation.The assessment should take into account the influence of wind turbines on the current within the wind farm in the surface layer.An area of approximately 2 000 km2 with a roughness length of 0.03 m in large wind farm is idealized.6 667 typical wind turbines about one million kilowatts are distributed uniformly over the area.The Frandsen method is used to analyze the influence of wind farm on the wind energy resources within the area where the internal boundary layer has filled the whole boundary layer in the wind farm.The results show that the wind speed at the height of 65 m will decrease when the situation with the presence of the wind farms is taken.This reduction becomes less when the wind speed at the height of 65 m increases,due to the property of drag coefficient in wind turbine.Within the wind speed range of 3~20 m·s-1 at the height of 65 m,the average wind power density considering the situation without and with wind farms are calculated,respectively.And the value decreases 58.45% when the wind farm is installed. |
| Keywords: | Wind farm Roughness length Logarithmic wind profile Drag coefficient |
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