Banca de DEFESA: ALAN RODRIGUES DE SOUSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALAN RODRIGUES DE SOUSA
DATE: 09/11/2022
TIME: 14:00
LOCAL: Remoto
TITLE:

Contributions to the Sliding Mode Control Strategy Applied to Grid-Forming Converters.

KEY WORDS:

Renewable Generation Systems, Sliding Mode Control, Grid-Forming Converters, Grid Connected Inverter.

PAGES: 120
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
SPECIALTY: Geração da Energia Elétrica
SUMMARY:

Distributed generation systems, which use renewable energy sources, are increasingly present
due to the need to meet energy demand and environmental restrictions. Generally, such
generation systems are connected to the electrical grid by means of power converters and,
their integration into it, can produce instability in the electrical system. With the advancement
in power electronics and the wide range of applications involving single-phase voltage
converters, it is possible, with the appropriate control strategy, to dodge instability problems
and also to offer improvements in power quality. For this, several control techniques have
been studied for this purpose, however, the classical techniques fail for not having robustness
to parametric uncertainties and are dependent on the system model. Thus, the control by
sliding modes has gained space in the control of converters because it is a robust technique to
parametric uncertainties and is independent of the system model, but the presence of
chattering in the controlled variable in steady state is its main disadvantage. This master
thesis presents a sliding mode control strategy applied to single-phase grid-forming converters.
The proposed strategy employs linear systems analytical tools to determine the of closed-loop
poles' suitable location when constrained to the splip surface. Furthermore, it is using a
simplified structure for the internal current control. Simulation results obtained from a single-
phase VSI connected to the grid operating under different operational conditions demonstrate
the effectiveness of the proposed solution.

COMMITTEE MEMBERS:
Presidente - 1196444 - RICARDO LUCIO DE ARAUJO RIBEIRO
Interno - 1807863 - FLAVIO BEZERRA COSTA
Externo ao Programa - 1168362 - THIAGO DE OLIVEIRA ALVES ROCHA - UFRNExterno à Instituição - ALEXANDRE CUNHA OLIVEIRA - UFCG