Photovoltaic power processing with high efficiency using maximum power ratio technique

This paper shows in detail the study of a photovoltaic power processing and control circuit with the objective to maintain a photovoltaic module at the maximum power point using the maximum power ratio technique-MPRT. This function is accomplished by controlling the photovoltaic module voltage through the current drained from the module. The circuit is implemented using a DC-DC converter in buck configuration. The power stage, the control strategy, the system's operation principle and the simulation results are presented. In order to confirm the performance of the system, the experimental results acquired with the prototype constructed in laboratory also are shown.