Simulação de um inversor trifásico bidirecional para interface de eletropostos com a rede elétrica.

Abstract

The increase in electricity demand due to the addition of new loads connected to the grid has made infrastructure improvements essential, as well as advancements in converter systems, especially in the area of electric vehicles (EVs). Consequently, new technologies have emerged in the market, among them the well-known V2G, which allows EVs to supply energy back to the grid in addition to consuming it. For the conversion between direct current and alternating current, or vice versa, bidirectional converters are used. In this study, a three-phase bidirectional inverter with an LCL filter and damping techniques capable of mitigating the resonance peak was analyzed for grid connection. Additionally, the control system includes proportional-integral (PI) controllers, and grid synchronization is achieved using a PLL-type algorithm. The results of the injected current comply with harmonic distortion standards, being less than 5%. Finally, all simulations in this work were conducted using MATLAB/Simulink® software.