Simulation and Study of Maximum Power Point Tracking for Fixed-Pitch Marine Current Power Systems

Abstract

To improve the performance of the maximum power point tracking (MPPT) control of the fixed-pitch marine current power systems the principle of MPPT was explained according to hydraulic impeller output characteristics. In this paper, the MATLAB/Simulink simulation model of the FPMCP and its control system are built. The principle of operation and control strategies are analyzed. By using three-phase full-controlled PWM rectifier and by controlling the q axis component of generator stator current, the electromagnetic torque of motor can be adjusted. Thus the tip speed ratio of the impeller can be adjusted so that the fixed-pitch marine current power system can work at the maximum power point. Also, simulation results are provided to validate the theoretic analysis.