ASSESSMENT OF WIND ENERGY RESOURCE IN HUASHANGUAN WIND FARM

In order to provide scientific basis for the exploitation of Huashanguan wind farm,its wind resource was analyzed and estimated.In this paper the wind energy indices were calculated,such as average wind speed,wind speed frequency,wind direction frequency,wind energy of each direction,wind power density and hours of effective wind speed,using the wind data of 40m observation tower in Huashanguan wind farm from April 2005 to March 2008.According to the Assessment Methods on Wind Energy Resource of Wind Farm (GB / T 18710-2002),the wind energy resource in wind farm was assessed with the grading standard for wind power density.Based on historical and contemporaneous observing data of Zhongxiang meteorological station nearest to the wind farm,the background of observing wind was analyzed during wind observation.It showed that the annual average wind speed of each height at the wind farm was between 5.5 and 5.7m/s,and the annual average wind power density was between 190 and 205 W/m2 and that the percentage of annual effective wind speed was between 80.8% and 82.3%.The dominant wind direction at Huashanguan is completely opposite with the secondary wind direction,and the total frequencies in both directions at different height was between 44.9% and 50.5%.The distribution of wind power at each direction was more concentrated than the wind direction frequency,and the energy of dominant wind direction at different heights was accounted between 47.8% and 60.6%.The wind power density at different heights was between the second and third level,which is certainly valuable in the development and utilization.Observing wind at Huashanguan wind farm was under the climate background,which the annual average wind speed was less than the mean wind speed over years.