The impact of the wake in terms of wind speed deficit was studied under many aspects by the wind industry but is less documented regarding wind direction bias. The analysis relies on a case study conducted on a Wind Park located west part of France, with a supervision meteorological mast following IEC61400-12-1 conditions. It is used as a trusted external reference of direction. To perform the analysis, the comparison was done between the supervision met mast wind direction and the directional data from the turbine (wind direction / nacelle direction), only for the waked-free sector of the mast. The objectives are: · Monitor the direction deviation of the wind turbines on this Wind Park, · Analyse the impact of external wind conditions: vertical wind shear and turbulence intensity at the mast. · Understand the behaviour of the wind turbines in such conditions.
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