When conducting wind analyses and power generation predictions for a large-scale wind farm, it is standard practice to make calculations of the vast size of the target area by dividing the area into a number of sub-areas. In areas of complex terrain, these activities become relatively difficult and it is not easy to provide results with high reliability (prediction precision), which means that considerable amounts of time and money must be expended. We provide services that expertly address demands of this nature.

In this case presented here, the project involved the installation of a large-scale onshore wind farm in the Tohoku region’s interior (mountains area). As project planning was still at an early stage and details were yet to be established, we conducted simulation-based wind analyses, studied wind turbine arrangements and types based on the results, and calculated extreme wind speeds. We then proposed the case that we thought had the highest project feasibility.

Due to the vastness of area envisioned for development and the fact that wind data was being obtained from multiple locations, we subdivided the calculation area and then calculated the amount of power to be generated in multiple cases for each of wind turbine arrangement, turbine type, and turbine hub height. The number of calculation cases became enormous as a result, so considering power generation by exceedance probability, we made prediction calculations for nearly 100 cases. Based on these calculations, we proposed the suitable wind turbine arrangements and turbine types from the standpoint of product feasibility and used them to develop the basic plan for the project.