摘要
通过不同地区不同地形风电场湍流强度的日变化和年变化实际情况,总结其特点及背后的影响因素。分析结果可知,平坦地形湍流强度的日变化和年变化较明显;复杂地形的湍流强度日变化和年变化趋势与平坦地形相似,但复杂地形易出现高层湍流比低层湍流大的情况;陆地的湍流强度日变化的高峰值与日出时间有关,日出越早,越早达到高峰值;沿湖和沿海地区的湍流强度日变化和年变化不太明显,低层与高层湍流强度变化存在较大差异。这些规律主要与不同地形的粗糙度和大气边界层的演变有关。该文总结了湍流强度及变化规律,并对风力发电机组及风电场设计提出相应的应对措施。
through wind turbulence intensity of daily and yearly variations of the actual situation in different kinds of regions and terrain, summed up their characteristics, and the influencing factors in different regions and different terrains. From the analysis result, the turbulence intensity of the daily and yearly had more obvious changes in the flat terrains, the variation in the complex terrain was similar with the flat terrains, but complex terrain normally has higher turbulence in the high layer than the lower level. The peak value of turbulence intensity diurnal variation was mainly related to the time of sunrise on the land the sooner sunrised, the sooner reached a peak value; The turbulence intensity of the daily and yearly changes are less pronounced in lake and coastal areas, the turbulence intensity of the daily and yearly variation was not obvious in the lake and the coastal areas, There is a big differences between turbulence intensity from low-rise and high-rise in the lake and the coastal areas.These law was mainly related to the different types of terrain roughness and the evolution of the atmospheric boundary layer. This article summarized the turbulence intensity and variation, then put forward the corresponding measures of wind turbine and wind farm design.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第11期2327-2333,共7页
Acta Energiae Solaris Sinica
关键词
湍流强度
大气边界层
日变化
年变化
地形
粗糙度
turbulence intensity： the atmospheric boundary layer
daily variations, yearly variations
terraim roughness
