Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

Increasing converter power density is a problem of topical interest. This paper discusses an interleaved approach the efficiency increase in buck-boost stage inverter with unfolding circuit terms losses semiconductors, output voltage ripples and density. Main trends development are reviewed. A model was designed used for proposed solution to find optimal number cells. It describes static dynamic semiconductor switches buck boost mode. The presented calculation results demonstrate photovoltaic system. 1 kW prototype two parallel dc-dc cells experimental verification obtained theoretical results. confirm statements.