Analysis and Modeling of a Boost Converter with Power Processing Reduction for PV Applications

The use of photovoltaic (PV) systems has experienced rapid development as part of renewable energy sources. These systems require DC/DC converters with wide transformation ranges to provide regulated output voltages. In PV applications isolated from the electrical grid, output voltage levels of 24 V and 48 V have commonly been reported. Due to the inherent low efficiency of PV modules, it is essential that the converter performs highly efficient power processing in order to properly utilize the energy generated. This paper proposes the analysis of a boost converter based on the concept of Partial Power Processing (PPP) as an alternative for photovoltaic applications. The analysis and evaluation of PPP are presented through modeling in the Volt-Ampere area, as well as through the study of the dynamic effects that this type of processing introduces into the system. Additionally, the switched and linear models of the converter are developed, along with the analysis of PPP through the buffer element. Finally, the obtained results through simulations and experimental measurements are presented, demonstrating a 4.21% increase in the overall efficiency of the system compared to the conventional boost converter.