中国电力2024，Vol.57Issue(5)：232-239,8.DOI:10.11930/j.issn.1004-9649.202305049
内陆复杂风电场风速垂直外推模型研究
Study on Vertical Extrapolation Model of Wind Speed in Inland Complex Wind Farms
摘要
Abstract
According to the evaluation of onshore wind energy resources,the hub height of the wind turbine is greater than the height of the wind tower.The influences of atmospheric stability and surface roughness changes are ignored,and the wind shear index is affected by ground topography and geomorphic factors.Moreover,the wind speed is difficult to predict accurately when increased to the hub height.Therefore,based on Monin Obukhov's similarity theory and the least squares calculation model of dynamic roughness,a fitting method based on atmospheric thermal stability under neutral conditions was established.Firstly the spatial distribution of wind shear index at different locations and its correlation with changes in atmospheric stability were evaluated.Secondly,based on the measured data of onshore wind farms with two different landforms,the proposed method was compared with the commonly used calculation scheme of wind speed at hub height using comprehensive shear extrapolation.The results show that the daily variation of wind shear index is correlated with that of atmospheric stability.The new calculation method of the extrapolated wind speed model can evaluate the vertical distribution of wind speed at target height more accurately.关键词
风能/大气稳定度/风切变指数/幂律公式Key words
wind energy/atmospheric stability/wind shear index/power law formula引用本文复制引用
胡锐,武书洲,李永华,乔加飞..内陆复杂风电场风速垂直外推模型研究[J].中国电力,2024,57(5):232-239,8.基金项目
国家自然科学基金资助项目(52072081). This work is supported by National Natural Science Foundation of China(No.52072081). （52072081）
