Parallel power processing topology for solar PV applications

A high efficiency converter topology for extracting maximum power from a photovoltaic (PV) module to charge standalone storage devices is presented in this paper. A reversed buck-boost converter enabling parallel power processing with a power switch referenced to the common return is the main core of the charging system. Small signal analysis of the proposed charging system is carried out to facilitate the design of a compensator for the maximum power point (MPP) tracking. The simulation and experimental results confirmed the validity of the model, and verified the high efficiency system operation with MPP tracking. The use of the PPP with the split loads is also presented, which would improve the size, efficiency and step down duty ratio of the converters.