Banca de QUALIFICAÇÃO: MAX RODRIGUES MARQUES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MAX RODRIGUES MARQUES
DATA : 31/10/2018
HORA: 08:30
LOCAL: ECT - Sala 4
TÍTULO:

Wavelet-based Protection Applied in a Doubly-fed Induction Generator

PALAVRAS-CHAVES:

Doubly-fed Induction Machine, Electrical Fault Detection, Internal Protections,
Wavelet Transform

PÁGINAS: 100
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
ESPECIALIDADE: Medição, Controle, Correção e Proteção de Sistemas Elétricos de Potência
RESUMO:

With the globalization and the rapidly increasing global energy demand, it has been seeking the
sustainability guarantee due to the growing concern to preserve the planet for future generations.
Therefore, investments in clean and renewable energy sources, such as wind power generation, have
gained space in research groups in order to overcome their disadvantages and improve the
advantages. The doubly fed induction generator (DFIG) is the predominant one in the market.
Nevertheless, considering the electrical failures inherent to it and the ones in the power system (PS),
the protection of its elements is an important topic that still does not have comprehensive studies.
This dissertation investigates the techniques used to perform the internal and external protections
applied to the DFIG topology. As well as, it is presented the theoretical fundamentals about wind
energy conversion systems (WECS), wavelet transform and relay-based protections. A new
protection and detection method of internal faults in the DFIG assembly based on the maximal
overlap discrete wavelet transform (MODWT) will be proposed and evaluated. Furthermore,
qualitative studies on wavelet overcurrent and wavelet under-voltage protections will be introduced
in order to evaluate and validate these new protection trends applied to WECS. Preliminary results
applying the wavelet overcurrent protection to real signals, collected by an experimental test bench
with DFIG, demonstrated which the used mathematical tools had good performances for fault
detection and the system protection.

MEMBROS DA BANCA:
Presidente - 1807863 - FLAVIO BEZERRA COSTA
Externo ao Programa - 1597497 - LUCIANO SALES BARROS
Externo ao Programa - 1168362 - THIAGO DE OLIVEIRA ALVES ROCHA
Externo à Instituição - NÚBIA SILVA DANTAS BRITO - UFCG