基于Windographer的某区域风电场风资源分析评估

Analysis and evaluation of wind resources in a regional wind farm based on Windographer

根据甘肃省某区域风电场测风塔10 m、40 m、60 m、80 m高度的实测风数据,利用Windographer4.2风资源分析软件计算空气密度、平均风速和风功率密度年内变化和日变化、风速和风能频率分布、风向频率和风能频率方向分布、风切变指数、湍流强度和50年一遇最大风速等指标参数。其计算结果表明测风塔80 m高度年平均风速为6.93 m/s,年平均风功率密度为354 W/m^2,年有效风速(3.0~25.0 m/s)时数为7200 h以上,盛行风向稳定。60~80 m高度湍流强度在0.072~0.080之间,小于0.12,湍流强度较小。综合判定该区域风能资源较为丰富,符合大型风电场建设条件,适宜进行大规模风电开发利用。

Using Windographer 4.2 wind resource analysis software to calculate air density,average wind speed and wind power density within the year and daily changes,wind speed and wind energy frequency distribution,wind direction frequency and wind energy frequency direction distribution,wind shear exponent,turbulence intensity and maximum wind speed once in 50 years based on the measured wind data at 10 m,40 m,60 m,80 m heights of wind measurement towers in a region of Gansu Province.The calculation results show that the annual average wind speed at the height of 80 m of the wind measurement tower is 6.93 m/s,the annual average wind power density is 354 W/m2,and the annual effective wind speed(3.0~25.0 m/s)is more than 7200 h.The prevailing wind direction stable.The turbulence intensity at the height of 60 m to 80 m is between 0.072 and 0.080,which is less than 0.12,and the turbulence intensity is small.It is comprehensively determined that the region has abundant wind energy resources,which meets the conditions for large-scale wind farm construction and is suitable for large-scale wind power development and utilization.