A new system was developed to estimate wind velocity distribution around the offshore wind-power generators, by assuming the wind energy conservation equation. Based on the long-term wind and power-generation observed data at the offshore and on-land stations, applicability of the tri-dimensional numerical wind simulation based on the k-ε model was confirmed. Interactions among the wind-power generators were estimated by using the numerical simulation, and example of the estimated power generation rate distribution around the existing generators was introduced. It was concluded that wind power generators reduce the wind velocity and wind-power potential of the surrounding sea-surface in the large area more than 5 times of the wind generator's diameter.
