Evaluated Potential Energy of Wind Power in Kyushu Considering Wind Fluctuations

Abstract

Wind power energy densities and annual productions generated by middle-scale windmill facilities in Kyushu were estimated based on information of fluctuations of wind direction and speed minutely recorded by NeWMeK using power transmission lines. It was found that several places of NeWMeK provided available annual means and stable directions of wind for wind power generation although their fluctuations of wind were not low. Production of electricity based on low wind speed with large fluctuations accounts for a large percentage of whole production. So, actual electric power generation may not reach the potential wind energy estimated using only annual mean wind speed record.  Many windmill facilities which were located at places with big turbulence of wind will not exhibit the best performance in power generation.