Análise de associações de conversores CC-CC em sistemas fotovoltaicos com processamento parcial de potência.

Abstract

In this work, two associations of power converters using the partial power processing concept (PPP) are analyzed. The first one, referred as cascaded PPP, focus on reducing the amount of power being processed by the converters, allowing more power to flow directly to the output. The next one, called parallel PPP, intends to increase the efficiency of the PV system for low input power values, flattening the efficiency curve over the whole input power range. A comparative analysis is realized between the proposed associations and the simple PPP. Both systems were designed under the same specifications, using power converters based on twoswitch forward topology. Simulation results are obtained using a detailed loss model implemented in Matlab-Simulink. A prototype of a 480W PV system was built to validate the loss model. The results show an improvement of 1.11% in its weighted efficiency in comparison with the simple PPP approach.