This paper deals with the problem of the control of thrust generated by conventional bladed propeller of marine thrusters and moved by an electric motor. This paper described a control law based on the estimation of the thrust using two features: an Extended Kalman Filter to observe the torque and an reversed hydrodynamic model of the propeller to control the thrust by a Proportional-Integral controller. The performances and robustness of this control law is compared to a PI controller without estimator and to the Model-Based-Velocity control.
The Ocean, which covers two-thirds of the world, captures and stores huge amounts of energy. Several sources of energy can be used. This paper presents a brief review of state of the art on the marine tidal current generation technology. The purposes are as follow: the first part concerns the conversion of marine current energy into mechanical energy, a synthesis of the existing methods of the modeling of the resource and of the marine current turbine are presented. The second part is dedicated to the conversion of the mechanical energy to electrical energy by taking into account the power converters for the control and the grid connection. Some simulation results are briefly shown for each part.
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