Methods and systems for alleviating the loads generated in wind turbines by wind asymmetries

Wind turbine control system connected to measuring devices of, at least, wind speed V and wind direction, generator speed Ω, pitch angle θ of each blade, power P, azimuth position of the wind turbine blades ψ and to, at least, pitch and torque control actuators;

• the wind turbine control system being arranged for performing a regulation of the wind turbine according to a predetermined power curve (25) for wind speeds below the cut-out wind speed Vout;
• the wind turbine control system being also arranged for performing an individual pitch regulation of each blade adding to the collective pitch θ0 a pitch determined by a control law implemented in a control unit of the control system for counteracting rotor asymmetric loads using wind speed and wind direction measurements at the wind turbine, values of the wind features that cause rotor asymmetric loads and configuration parameters of the wind turbine.