Abstract
In this paper, a single stage buck-boost inverter is proposed for grid connected PV system with a very high voltage gain. The proposed inverter not only boosts DC output voltage of the PV module but also converts it into AC voltage which is required for grid connection. Discontinuous conduction mode (DCM) is employed to achieve unity power factor with the grid voltage and a maximum power point tracking (MPPT) control. The proposed topology has several desirable features such as high gain, low cost, compact size and simple control. Only two switches operate at high switching frequency and so switching losses are minimized. Simulation and experimental results are given to prove the proposed system.
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