Banca de DEFESA: DIEGO OLIVEIRA CARDOSO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : DIEGO OLIVEIRA CARDOSO
DATA : 08/05/2020
HORA: 09:00
LOCAL: Departamento de Engenharia Elétrica e de Computação, Escola Politécnica da UFBA
TÍTULO:

Three-phase inverter control connected to the grid with LCL filters.

PALAVRAS-CHAVES:

LCL Filters, strict optimization, decoupling and damping.

PÁGINAS: 67
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
ESPECIALIDADE: Conversão e Retificação da Energia Elétrica
RESUMO:

This paper discusses control strategies for the connection of the three phase inverter to the grid through LCL filters. Three different methods are presented: conventional dq, multivariate and optimized PI. The first two proposals consider simplified modeling for the system plant and therefore neglect the resonance phenomenon caused by the use of high order filters. Closed-loop stability is guaranteed for this simplification through the use of extra cushioning strategies. The optimized method uses non-parametric models of the plant and the control is performed using fifth order controllers. The constants of these controllers are determined with the solution of a restricted optimization, which guarantees the decoupling and stability of the system. It was possible to verify that the conventional strategy guarantees the stability of the closed-loop plant, but the power decoupling is not achieved. This objective is achieved with the controls, multivariate and optimized PI, presenting stability and decoupling. Among these two techniques, only the optimized one was able to decouple the powers, even with variations of the plant parameters.

MEMBROS DA BANCA:
Presidente - 1666309 - FABIANO FRAGOSO COSTA
Interno - 1151839 - ANDRE PIRES NOBREGA TAHIM
Externo à Instituição - DARLAN ALEXANDRIA FERNANDES - UFPB