Review on Study of Atmospheric Boundary Layer and Wind Power Generation Interaction
ZHANG Shuangyi;HU Fei;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;China Three Gorges NewEnergy Company Limited;
Atmospheric boundary layer( ABL) and wind power generation( WPG) interaction has become one of the hottest research subjects in recent years,and its study has both important scientific significance and high industrial value. Beginning with introduction of WPG 's fundamentals and theories,this paper describes and discusses principles and mechanisms of ABL and WPG interaction,and also summarizes and concludes the latest study progresses in the field. The influence of ABL on WPG is mainly concerned with two aspects: The wind turbine's output power and mechanical load,which play key roles in the wind turbine's energy production and structural integrity. The Wind turbine's output power and mechanical load generally increase with wind speed,and they also were found to be affected by structure and characteristic of ABL 's ground wind field in recent studies. Due to wildly existence of wind shear phenomena in ABL,the wind turbine's output power is decreased and mechanical load is increased. Turbulence phenomena have both positive influence on the wind turbine's output power in lowwind speed section,and negative influence in high wind speed section. However,the wind turbine's mechanical load monotonically increases with turbulence intensity increasing. ABL 's stratification stability has significant diurnal variation,along with changing ground wind field's structure and characteristic( such as wind shear and turbulence),and accordingly affects wind turbines' output power and mechanical load characteristics. The mechanisms of ABL 's influence on WPG need to be further investigated,and the mathematic-physical models for practical engineering need to be established. The wind turbine absorbs wind energy by blades and rotor rotating,which accordingly exerts perturbation effect on the air flow. As a consequence,the downwind area's wind speed is decreased and turbulence is increased,and both of them were found having complex space distributions in latest studies. The so-called "wake effect"not only has negative influences on the wind turbine's output power and mechanical load,but also can change local meteorological elements and weather processes. Large scale wind farms or wind power bases,which extend tens of kilometers and planting hundreds of wind turbines,can produce huge perturbation effect and then change the whole structure and characteristic of ABL. The inner boundary layer model of "infinite"wind farm was developed to estimate ground wind field's wind speed and turbulence properties in large scale wind farms' affection scenario. The model was applied not only in wind energy industry for calculation of wind turbines' output power and mechanical load,but also in atmospheric science study for assessment impact of today 's world-wide rapid growth of WPG on local and global climate-environment change.
【CateGory Index】： P49;TM614
【CateGory Index】： P49;TM614