Fuzzy Gain Scheduling of a Rotational Speed Control for a Tidal Stream Generator

In the field of marine energy conversion, the main aim of a Tidal Stream Generator (TSG) plant is the maximization of the output power as the speed of the tidal current varies. In this context, this paper deals with the modeling and control of a Doubly Fed Induction Generator (DFIG)-based TSG system. A Fuzzy Gain Scheduling controller is presented to improve the rotational speed control by means of the Rotor Side Converter. The Maximum Power Point Tracking strategy is implemented to provide the reference signal to the fuzzy supervisor in order to extract the maximum power from the tidal resource. Simulation results demonstrate that this novel control strategy successfully improve the generated power and provide an effective result against the change of the tidal speed input.

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