Calculation of Wind Shear Coefficient and Wind Energy Evaluation for Milnader, Iran

Wind measurements are generally performed below wind turbine hub heights due to higher measurement and tower costs. For this reason, approximate methods are used to calculatethe wind speed at the hub height. One of these methods is to utilize the Wind Shear Coefficient (WSC). There are many methods tocalculate the wind shear coefficient, but maybe the best method is using the weather information. Considering the WSC as a constantvalue may lead to critical error in the estimated power generation of the wind power plant. This study presents the local values ofWSC estimated using wind speed measurements made at 30 and 40m above ground level during September 01, 2010 and September 01, 2011. These local values of WSC are used to estimate the wind speed at hub height of the wind turbine used in the study. In case of air density, no diurnal change is evident butseasonal trend, with higher values in winter and lower ones in summer.

Keywords:

Capacity Factor , Milnader , Wind Shear Coefficient , Wind turbine