Multi-output differential power processing system using boost-flyback converter for voltage balancing

摘要

In this paper, a new boost-flyback converter topology for a Differential Power Processing(DPP) System in feed-forward type is proposed. Output of photovoltaic(PV) panels are connected in series, each of them is attached to DPP converter and then the output of the DPP converters are coupled in series. These outputs of the DPP converters need to balance the voltage each other to ensure the proper working of the PV generation when energy imbalance condition occurs such as partial shading. To balance the voltage under partial shading conditions, the secondary flyback rectifier of the main string boost-flyback converter is interfaced each of DPP converter. To validate the performance of the proposed method, computer simulation(PSIM) and 75watts' prototype hardware experiments are presented.