电力科技与环保2025，Vol.41Issue(4)：658-667,10.DOI:10.19944/j.eptep.1674-8069.2025.04.014
峡谷地形条件下风电场风切变模拟分析
Simulation analysis of wind shear in wind farms under canyon terrain conditions
摘要
Abstract
[Objective]In view of the frequent clearance reduction of wind turbines in wind power projects,the causes of negative shear are analyzed,mainly including atmospheric thermal stability,ground roughness and terrain factors.[Methods]According to the needs of site selection,the wind shear characteristics under complex terrain conditions are taken as the research object.Based on the measured data of the wind tower and the position of a wind farm in a complex terrain,the wind shear at different positions under canyon terrain conditions is analyzed by steady-state simulation and transient simulation using the computational fluid dynamics(CFD)method,and the wind resources are evaluated in detail.[Results]The simulation results show that it is necessary to analyze the wind shear of the canyon terrain in different sectors when evaluating the wind resources,so as to avoid the situation that the whole is positive shear and the local sector is negative shear.The steady-state simulation combined with transient simulation can obtain the wind shear characteristics of each position under gust conditions.At noon,the measured average wind shear of the wind tower is-0.01,and the position on the ridge line of the windward slope is F07,and the impeller surface is in the negative shear area.0,the wind shear on the impeller surface becomes-0.009,2/8T,the wind speed at 35 m height reaches 18.55 m/s,the wind speed at 165 m height is 16.76 m/s,the wind speed difference between the two is 1.79 m/s,the wind shear on the impeller surface is-0.066,and the topographic factors lead to the increase of the negative shear of the position.The position can be located on the windward slope below the canyon ridge.[Conclusion]It is recommended to select different models or different hub heights of the same model to adjust the distance between the tip and the ground to avoid or reduce the impact of negative shear.Considering the influence of the backflow caused by the occlusion of the mountain,the seats should not be arranged on both sides of the canyon and the leeward slope;technical measures such as blade clearance optimization design and blade clearance monitoring should be adopted for existing projects to prevent the risk of collision between blades and tower.关键词
风电机组/CFD/负切变/峡谷地形Key words
wind turbines/CFD/negative wind shear/canyon terrain分类
能源科技引用本文复制引用
王莹,袁飞,夏德喜..峡谷地形条件下风电场风切变模拟分析[J].电力科技与环保,2025,41(4):658-667,10.基金项目
国家能源集团联合动力技术有限公司北京技术开发分公司科技项目(JSKF-2022-01) （JSKF-2022-01）
