Yaw rotation control for a new twin wind turbines structure based on super-twisting strategy

This paper presents a novel strategy for controlling the yaw rotation of a new twin wind turbines structure without a dedicated actuator. The idea of such strategy is to create a difference between the powers produced by the wind turbines, by modifying the generators torques, in order to force the structure face the wind. Given that the wind turbine performance is affected by the wind variation, a super-twisting controller is applied to optimize the produced power, by keeping the structure facing the wind, and to reduce the oscillations on the shaft coupling between turbine and generator. The performances of the proposed controller are compared to those obtained by standard sliding mode approach, for several scenarios.