Abstract
This paper presents the maximum power point tracking (MPPT) for stand-alone wind energy conversion system. The proposed method does not require the characteristics of wind turbine and mechanical sensor. The MPPT by perturb and observe (P&O) method is proposed. The process of control is used to perturb operating point of system by changing duty cycle of buck converter and to observe the change of dc-side power. The proposed method detects the maximum power and the change of wind through the relationship between dc-side power and duty cycle of buck converter. The simulation and experimental results from laboratory show that the proposed method can extract the maximum power from the wind power in accordance with the wind speed. Finally, the experimental results from real wind turbine 300W present the effectiveness of the proposed MPPT method.
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