Quadratic Buck/Boost Converter in Series Connection for Photovoltaic Applications

Abstract

This paper proposes a quadratic buck-boost converter, which is based on a non-cascade connection of two basic switching cells. The proposed converter is analyzed into a photovoltaic architecture in series connection. The voltage conversion ratio, steady state operating condition, converter operating modes, and semiconductor voltage and current stress are derived. The characteristics of the proposed converter are verified through simulation results, where the layout of the photovoltaic system uses two quadratic converters, each with an MPPT P&O strategy.