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[目的]探讨河西走廊中西部风能资源的时空分布特征及储量。[方法]利用河西走廊中西部10个气象观测站1955～2007年风速气象资料和2007年～12月专用风塔精细资料,研究了该区域内风能资源的分布特征及其储量。[结果]河西走廊中西部环境风速相对比较稳定,气候特征分布上无明显的跳跃式变化;风能资源分布存在明显的地域性差别,瓜州县和玉门市附近存在1个风能大值区;区域内风能普遍较高,10m高度层内风能密度在100w/m2以上,大部分地方在140w/m2左右,大值地带在200w/m2以上;垂直方向上风能随高度呈线性增长,平均每升高10m风能约增加15w/m2左右,50m层风能普遍大于240w/m2。河西走廊中西部风能存在明显的日、年变化,3～5月是风能密集阶段;距地面高度10m处风能在10:00前后处于低值,从11:00以后不断增大,到18:00前后达到日最大,然后逐渐减小。区域内年有效风速时数普遍在6200h以上,大值区接近7600h。[结论]为河西走廊中西部风能的开发利用提供了理论结据。
[Objective] The research aimed to investigate the spatio-temporal distribution characteristics and reserves of wind energy resources in central and western Hexi Corridor. [Method] The wind speed and meteorological data of 10 meteorological stations in the central and western Hexi Corridor from 1955 to 2007 and the detailed data of special wind towers from 2007 to December were used to study the distribution characteristics and reserves of wind energy resources in this area. [Result] The wind speed in central and western Hexi Corridor was relatively stable and there was no obvious leaping change in the climatic characteristics. There was a clear regional difference in the distribution of wind energy resources. There was a large area of wind energy near Guazhou County and Yumen City. The internal wind energy is generally high. The wind energy density in the 10m height layer is above 100w / m2, mostly in the area of about 140w / m2, and the large value area is above 200w / m2. The wind energy in the vertical direction increases linearly with height, 10m wind about 15w / m2 increase about 50m layer wind energy is generally greater than 240w / m2. The wind energy in the central and western Hexi Corridor has obvious daily and annual variations, and the wind energy intensive stage from March to May; the wind energy at the height of 10m from the ground is low at 10:00 and continuously increases from 11:00 to 18:00 Day before and after reached the maximum, and then gradually reduced. The annual effective wind speed in the region is generally above 6200h, and the large value region is close to 7600h. [Conclusion] This provided theoretical evidence for the development and utilization of wind energy in central and western Hexi Corridor.