Résumé : This paper presents the detailed modeling and the Energetic Macroscopic Graphical Representation of the Marine Current Turbine (MCT) System. The studied marine current turbine system consists of 1.5 MW Fixed Pitch Tidal Turbine, Permanent Magnet Synchronous Generator; AC-DC fully controlled machine side converter, DC link, DC-AC fully controlled grid side converter, connection cables, transformer, and the central grid. The control of each converter is designed based on defining the tuning chain as a part of the system energetic macroscopic representation. The machine side converter control depends on the torque control maximum power point tracking and the generator loss minimization (Output Maximization) techniques to enhance the overall efficiency when the system runs under the rated marine current speed. The control mode is changed to the rated power limiting mode when the system runs above the base speed. The grid side converter is controlled to stabilize the DC link voltage within a certain range beside the reactive power control. The proposed control strategies are evaluated based on the model results by using the real data of The Alderney Race (Raz Blanchard in French) marine site.