Autor(es): Pinto, Vítor ; Monteiro, Vítor Duarte Fernandes ; Afonso, João L.
Data: 2023
Identificador Persistente: https://hdl.handle.net/1822/92765
Origem: RepositóriUM - Universidade do Minho
Assunto(s): Power electronics; Multilevel converter; Renewable energy; NPC converter; Digital control; Predictive control
The integration of renewable energy sources into the electrical power grid is a crucial aspect for achieving sustainable development and reducing en-vironmental impacts. This paper explores the implementation of a three-phase Neutral Point Clamped (NPC) DC-AC converter with level-shift carrier PWM modulation technique and predictive current control to facilitate the grid inter-connection of renewable energy systems. Multilevel converters offer important advantages over traditional two-level converters, such as reduced harmonic dis-tortion and improved efficiency. Computational simulations using the PSIM software were conducted to validate the operation of the converter, both as ac-tive rectifier and as inverter. The results demonstrated the ability of the convert-er to adjust its current generation, even when considering sudden power varia-tions in the load, as well as variations in the electrical power grid. Moreover, it effectively controls the DC-link voltage, while maintaining a minimal ripple in the controlled AC current. The obtained results allow to verify the robustness and reliability of the converter for the integration of renewable energy (solar photovoltaic panels) into the power grid, contributing to the pursuit of sustaina-ble energy solutions for a greener future.
