Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Variable Step-Size MPPT Control based on Fuzzy Logic for a Small Wind Power System
Authors Dae-Keun Choi ; Kyo-Beum Lee
DOI 10.6113/TKPE/2012.17.3.205
Page pp.205-212
ISSN 1229-2214
Keywords maximum power point tracking (MPPT); wind power system; boost converter; grid connected inverter; fixed step size; variable step size
Abstract This paper proposes the fuzzy logic based variable step-size MPPT (Maximum Power Point Tracking) method for the stability at the steady state and the improvement of the transient response in the wind power system. If the change value of duty ratio is set on stability of the steady state, MPPT control traces to maximum power point slowly. And if the change value is set on improvement of the transient response, the system output oscillates at the maximum power point. By adjusting the step size with fuzzy logic, it can be improved the MPPT response speed and stability at steady state when MPPT control is performed to track the maximum power point. The effectiveness of the proposed method has been verified by simulations and experimental results.