摘要
利用河西走廊东部5站1971-2004年逐日4次定时地面气象观测资料和2005-2006年地面自动气象观测站逐小时气象观测资料，用统计学方法分析了该区域近地面风速及风能的演变和分布。结果表明：河西走廊东部环境风速的气候变化比较稳定，但探测环境变化较大的站点风速下降十分明显；风能分布具有山区最大、沿河西走廊峡管和荒漠地带次之、中部武威绿洲盆地最小的地域分布特点；南部山区年平均风速均大于等于3．5m·s^-1、全年各月平均风速均大于等于3．0m·s^-1，且全年风向、风速跃变小，习平均有效风能时数大于等于13．9h，年平均有效风能时数大于等于5000h，因此具有较大的风能开发利用价值；北部荒漠和沙漠地区年平均风速为2．7m·s^-1，一年中3～7月风速较大，日平均有效风能时数为8．7h，年平均有效风能时数为2913h，年平均有效风能密度为82．7W·m^-2，具有季节性风能开发利用价值；位于绿洲盆地的凉州区由于各项风能参数均较小，不适宜进行风力发电。根据河西走廊东部地域和气候特点，分析了风能开发利用前景。
By means of the conventional weather observation data from 5 stations from 1971 to 2004 and the data from ground automatic weather stations from 2005 to 2006 in the eastern Hexi corridor, the evolution and distribution of near-surface wind speed and wind energy are analyzed by the statistical method. The results show that the change of the environmental wind speed was quite stable, but the wind speed decreased obviously where the environmental variation was bigger. The regional distribution characteristics of wind energy are that the wind energy was the biggest in the mountainous areas, the second along the Hexi corridor in the desert belt, and the smallest in the Wuwei oasis basin. The annual mean wind speed is greater than 3.5 m/s, and the mean wind speeds of all months are greater than 3.0 m/s. The jumping of both wind direction and wind speed is unobvious in whole year. The daily mean number of effective wind energy hours is greater than 13.9, and the annual mean number of effective wind energy hours is greater than 5000 hours in the southern mountainous area, where there is great potential for the development of wind resources. The annual mean wind speed is only 2.7 m/s, bigger from march to July, with the daily mean number of effective wind energy hours being 8.7 hours, the annual mean number of effective wind energy hours being 2913 hours, and the annual mean effective wind energy density being 82.7 W/m^2 over the northern desert areas, where the wind energy can be utilized seasonally. The various wind energy parameters are smaller in the Liangzhou oasis basin, where wind power generation, therefore, is not suitable. The utilization prospects of wind energy are analyzed according to the regional climate characteristics of wind power generation.
出处
《气象科技》
北大核心
2009年第2期198-204,共7页
Meteorological Science and Technology
基金
甘肃省气象局2007年重点科研项目"数值预报产品在河西精细化预报中的应用"资助
关键词
风能资源
分布特点
开发利用
河西走廊东部
wind energy resources, distribution characteristic, utilization, Hexi corridor
