Wind turbine and method for mitigating the asymmetric loads endured by the rotor or the wind turbine

摘要

A wind turbine comprises a rotor (10), a rotor hub (100), a transducer for measuring a displacement of a component of the turbine structure caused by asymmetric loads acting on the rotor, and a fixed supporting shaft (105) which supports the rotor at the rotor hub. Said transducer comprises at least one strain-gauge sensor arranged for measuring a deformation of the fixed supporting shaft due to asymmetric loads acting on the rotor. A computation system receives signals from one or more sensors and, based on the value of said signals, calculates at least one component of the asymmetric loads. The computation system commands actuators for individually setting the pitch of each blade of the turbine, in order to mitigate the asymmetric loads endured by the rotor.