Análise comparativa de estruturas de conexão com a rede elétrica em sistemas fotovoltaicos

Abstract

The growing increase in the participation of renewable energy generation systems in the worldwide energy matrix has led to a discussion in relation to the impact caused by the connection of these systems over the distribution grid. Passive filters, as connection structures between the generation systems and the distribution network, turn out to be fundamentally important in the prevention of disturbances caused by the poor quality of the injected energy. A comparative analysis of the dynamics of these structures in single-phase photovoltaic systems is highlighted in this research, in which the projects, simulations, and the analysis of the simulation results for the topologies L, LC and LCL are explained. In order to validate the obtained simulation results, we present experimental results that corroborate with those of the simulation results. The control system used is made up of a conventional structure, with a proportional-integral and a resonant control, used with the objective of ensuring a power factor close to the unit at the Point of Common Coupling (PCC) in the power grid, for each structure presented.