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A buck-boost integrated full bridge inverter for solar photovoltaic based standalone system

The existing standalone systems that are used to feed power from solar photovoltaic (PV) array to off-grid loads require several stages of power conversion thereby reducing its reliability and efficiency. One of the solutions offered in the literature to overcome this limitation is to design the system for higher PV and/or battery voltage levels. However, increment in the PV/battery voltage level makes design and installation issues of the system more involved in order to satisfy concerns pertaining to the safety of the personnel and equipment. In order to address the aforementioned limitations of the existing standalone PV systems, a topology involving a novel boost inverter which does not require the increment in the voltage levels of PV array and/or battery is proposed in this paper. Detailed analytical studies of the system are carried out. The efficacy of the proposed scheme is verified by means of detailed simulation studies.