Wind in complex terrain. A comparison of WAsP and two CFD-models

摘要

WAsP and the two CFD-models WindSim and 3DWind have been compared at a complex terrain site in western Norway for the two dominating wind directions south and north. One year of measurements from two 50 m masts and one 10m mast were available. The paper analyses the mean absolute error, the vertical variations of wind speed and turbulence with height, and meso-scale wind variations across the wind farm. Despite the simplicity and known weaknesses of WAsP in complex terrain, no improvements of the average wind speed calculations were obtained by use of the CFD-models. Meso-scale wind variations of the order 2-3 m/s during a particular weather situation were encountered for a case study by use of a meso-scale model.