Ali Chermitti's research while affiliated with Abou Bakr Belkaid University of Tlemcen and other places

The control of a new structure of twin wind turbines (TWT) is presented in this paper. This new concept includes two identical wind turbines ridden on the same tower, which can pivot face the wind with no additional actuator. The motion of the arms carrying the TWT is free. The control law based on sliding mode controller is designed to track the maximum power, by controlling the rotor speed of the TWT and the yaw rotation but without yaw actuator. Finally, performances of the proposed control strategy are compared to standard proportional integral controller, for several scenarios (time varying direction or magnitude of the wind, error on the inertia of the system, …).

A robust integral backstepping controller is designed in this paper in order to control a new structure of twin wind turbines. The novelty of this concept is the free motion of the arms carrying the two turbines. In order to initiate a yaw rotation, the pitch blades angles are modified to create a difference between the drag forces of the two rotors. The controller aims at maximizing the electrical power by an optimal orientation of the structure. A strategy based on backstepping approach is proposed.

The control of a new concept of the twin wind turbines is presented in this paper. This structure has two identical wind turbines, ridden on the same tower. The two wind turbines drive two identical permanent magnet synchronous generators (PMSG), and they can pivot face the wind without using the yaw actuator. The control of the full system including the mechanical and electrical parts is ensured respectively by a proportional integral PI and the nonlinear Backstepping. The first one is used to control the yaw angle rotation in order to keep the structure faces the wind. The second one is designed to control the electrical generators to optimize the power. The model of the twin wind turbine and the control strategy are implemented in Matlab/Simulink software.

In this paper a Backstepping Controller (BC) and a Maximum Torque Per Ampere (MTPA) strategy have been designed in order to control a permanent magnet synchronous generator (PMSG) at below and above rated wind velocity. At low wind speed, the wind turbine operates in partial load (PL) and the maximum amount of power is extracted. When the wind speed reaches the nominal value, the wind turbine operates in full load (FL). In this case, the pitch angle is controlled to limit the power. The proposed method is compared to the traditional PI via Matlab/Simulink software. The robustness tests show that the system has a faster and a more robust response.