Study on wind characteristic and wind wake effect in complex terrain

Abstract

In the previous paper [1], we have presented that the wind speed of the leeward wind turbine decreased in specific wind direction, and it could be affected by the wind turbine wake from the windward turbine using numerical simulation targeting two wind turbines in complex terrain. The aim of this study is to examine quantitatively the wind turbine wake effect based on the wind characteristics with topographical perspectives. We attempted the comparison of wind speed and generated power under two conditions, with effect of wind wake and without using wind data of actual onshore turbines. The two wind direction targets are the ones which can be leeward wind turbines for each other. This study shows that wind speed of the leeward wind turbine by about 25 35% decreased in the target wind directions when considering wind wake compared to the case without. It proved that power generation reduction consistent with wind speed reduction.