Visita aos Conceitos de Modelagem e Controle da Malha de Corrente de um VSI Trifásico com Filtro LC Conectado à Rede

Abstract

As part of the activities developed in the scope of a R&D+I, the present work visits the concepts of modeling and control of the current loop of a grid-connected voltage source inverter with LC filter. Using the equations of the power processing system in the synchronous reference, the block diagrams of the subsystems and their interconnections are developed, providing a correct understanding of the interactions between the control loops, the decoupling processes, as well as the system simplification steps. Employing classical control concepts, the tuning procedures for the current loop controllers are presented and discussed. Using parameters and configurations of the voltage source inverter present in one of the electrocenters of the Petrolina Reference Center in Solar Energy, computational simulations were conducted, being presented and analyzed results of current injected into the grid, voltages at the connection point, harmonic distortions, active and reactive powers and power factor.