Nombre: GUILHERME DAVID MULLER
Fecha de publicación: 08/02/2023
Supervisor:
Nombre |
Papel |
|---|---|
| DOMINGOS SÁVIO LYRIO SIMONETTI | Advisor * |
Junta de examinadores:
| Nombre |
Papel |
|---|---|
| ARTHUR EDUARDO ALVES AMORIM | External Examiner * |
| DOMINGOS SÁVIO LYRIO SIMONETTI | Advisor * |
| WALBERMARK MARQUES DOS SANTOS | Internal Examiner * |
Sumario: Considering the current trend of growth of systems based on renewable energy sources, mainly photovoltaic distributed generation (DGs), new topologies of DC-AC converters are being developed for conversion systems with a focus on multilevel converter structures, in order to to increase efficiency at the lowest possible cost. This work describes a literature review on photovoltaic energy processing, including the operation of the solar system, MPPT methods, types of converters used and modulation strategies. After the review, a new grid-connected single-stage DC-AC inverter topology is presented, inspired by the
flying capacitor multilevel converter cell. All components of the proposed converter were dimensioned and, for validation, a simulation structure was developed using the MPPT control through the incremental conductance algorithm acting only on the modulating signal angle, with unit modulation index. As a modulation strategy, PWM modulation with two phase shifted carriers (PS-PWM) was used. The system was simulated in the MATLAB®/Simulink environment for a 6.4 kW photovoltaic system at 25 ◦C and
subjected to changes in irradiance to analyze the behavior and performance of the converter.
