In this paper, the control method of extracting maximum power from the seaflow energy is proposed. This paper describes a variable speed seaflow generation system consisted on permanent magnet synchronous motor, bridge rectifier, boost converter and Fuzzy controller. In this proposed seaflow generation system, the duty ratio of boost converter is controlled by the fuzzy controller. An advantage of MPPT control method presented in this paper doesn’t need to measure the seaflow speed and the rotating speed of seaflow turbine. Therefore, the proposed system has the characteristics of lower cost, lower complexity and higher efficiency. The effectiveness of algorithm is simulated based on Matlab Simulink®.
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