Method for determining a wind speed in the region of a wind turbine, and a wind turbine for performing the method

A method of determining a corrected wind speed of a wind turbine, the method comprising:

• measuring a wind speed in a region of the wind turbine, wherein measuring the wind speed includes:
• measuring the wind speed at a first distance windward of the wind turbine or at a first position
• determining a force exerted on at least one rotor blade from wind,
• establishing a second distance at the windward side of the wind turbine or a second position at which the corrected wind speed is to be determined, wherein:
• the second distance is a windward distance, or
• the second position is in a region outside a near field region of the wind turbine,
• determining a wind speed difference value, wherein the wind speed difference value depends on:
• the determined force,
• the first distance or the first position, and
• the second distance or the second position, and
• determining the corrected wind speed by correcting the measured wind speed in dependence on the wind speed difference value.