Banca de DEFESA: KEVIN EDUARDO LUCAS MARCILLO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: KEVIN EDUARDO LUCAS MARCILLO
DATA: 11/06/2018
HORA: 15:00
LOCAL: Sala 03 do PGITEC
TÍTULO:

Avaliação de Desempenho de Estratégias de Controle Robusto Paramétrico Aplicadas à Supressão de Efeitos de Oscilações Devido Cargas de Potência Constante em Sistemas Multiconversores do Tipo Buck-Buck

PALAVRAS-CHAVES:

multi-converter system; robust control; robust parametric control; constant power load; parametric variation; buck converter; kharitonov stability theorem; chebyshev theorem.

PÁGINAS: 60
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
RESUMO:

Multi-converter electronic systems are becoming widely used in many industrial applications; therefore, the stability of the cascaded system is a big concern to real-world power supplies applications. Instability in cascaded systems may occur due to the constant power load (CPL), which is a behavior of the tightly regulated converters. CPLs exhibit incremental negative resistance behavior causing a high risk of instability in interconnected converters; therefore, the mitigation of this problem is an important issue in the multiple-stage switched mode power supply design. Thus, it is important to guarantee stability of the whole system. However, some difficulties remains besides the CPL, e.g., non-linearities due to the inductive element and uncertainties due to imprecision of mathematical models and/or variation of nominal values of the discrete elements that compose the DC/DC buck converter. Aiming to evaluate the performance of the proposed robust methodologies in this work to mitigate the instability problem caused by a CPL, several tests were developed by using an experimental plant and Matlab/Simulink, when the multi-converter buck-buck system is subjected a variation of power reference. The results show the improved performance of the proposed methodologies.

MEMBROS DA BANCA:
Interno - 2153010 - CARLOS TAVARES DA COSTA JUNIOR
Externo à Instituição - JOSE AUGUSTO FURTADO REAL
Interno - 2224684 - MARCUS VINICIUS ALVES NUNES
Presidente - 6147556 - WALTER BARRA JUNIOR