Estudo e aplicação de técnicas de MPPT em sistemas fotovoltaicos com conexão paralela

Abstract

The crescent global energy demand and the present concern with the reduction of conventional sources of energy, associated with environmental issues, produced a significant incentive for research and development of alternative energy sources, being solar energy fairly well distributed throughout the earth's surface and one of the most promising sources of renewable energy. Within this context, this work aims to investigate and ensure optimization of global energy by means of parallel architectures of DC/DC converters, regardless of conditions of solar radiation. The global optimum of such connections is obtained by tracking techniques of maximum power point (MPPT) in all modules. The difficulty of ensuring the extraction of the total maximum power is when the disruption occurs at the time when solar radiation levels differ between the modules. The project was implemented in MATLAB / Simulink software, whose purpose was to validate the numerical simulation of a PV system with the parallel structure of DC/DC converters, connected to a single-phase distribution network, where some of the techniques found in the scientific literature MPPTs were implemented, analyzed and compared.