Evaluation on the Numerical Simulation Model of Wind Speed Distribution behind the Offshore Wind Power Generation Used Observed Data

The amount of wind power generation aims for three millions kWh by 2010 in Japan. It is very few offshore construction in Japan compared with European countries. It is generally said that offshore wind energy is greater than in land area, and few disturbance. In Japan, suitable construction sites for wind power generation in land are decreasing, then, the construction of wind power generation in port and coastal area is strongly hoped. The first offshore wind power generation in Japan was completed at the port of Setana, Hokkaido in 2004. The size of wind power generation is 600 kW and the numbers of wind generators are two. Field observation on wind speed distribution was carried out by the Wind Power Generation Research Association for Port and Coastal Area organized in Coastal Development Institute of Technology (CDIT), Japan. This paper describes on the wind speed distribution behind the offshore wind power generation by use of the filed observation carried out at the port of Setana and the result of numerical simulation on the wind speed distribution. Field observation was carried out in February, 2004. The measuring of wind speed was carried out by use of the laser radar installed on the land. The accuracy of measured data was calibrated by observed data by wind cup pattern anemometer installed on the breakwater. The profiles of vertical wind speed distribution at the offshore site are examined by use of observed data. And also the numerical simulation model and its parameter on the ratio of sheltering effect by the wind power generation are examined.