Banca de DEFESA: FRANCISCO CANINDE DA SILVA JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : FRANCISCO CANINDE DA SILVA JUNIOR
DATA : 03/08/2018
HORA: 09:00
LOCAL: ECT - Sala 4
TÍTULO:

Overhead Transmission Line Protection in Monopolar LCC-HVDC Systems Based on One-Terminal Traveling Wave


PALAVRAS-CHAVES:

Transmission Lines, LCC-HVDC Systems, Traveling Waves, One-Terminal Protection


PÁGINAS: 80
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
ESPECIALIDADE: Medição, Controle, Correção e Proteção de Sistemas Elétricos de Potência
RESUMO:
In general, the direct current (DC) transmission conventional system lines, systems
LCC (Line Commutated Converter), presents great lengths, which increase the fault occurrence
rate and, consequently, the demands on the protection methods. A transmission
line protection with fast actuation is indispensable, because avoid damage in the system’s
assets, loss of stability and increase the capacity of electrical energy transmission. Currently,
the protection methods with potential to become the quickest existing are the traveling
wave-based methods. In this work, the traveling wave theory and the traveling wave-based
protection principles are investigates and, at the end, is proposes an one-terminal traveling
wave-based protection scheme for overhead transmission lines of monopolar LCC-HVDC
(High Voltage Direct Current) systems. The proposed method is based in the arrival time
of the first and second traveling waves on just one line terminal. Therefore, presents the
advantage of not need of a communication system and data synchronization between the
line ends as required in the two-terminal traveling wave-based methods. The sampling
frequency impact on the proposed method is considered, which, in general, is not realized
by the one-terminal traveling wave-based methods. Expressions to determine the
minimum sampling frequency for that the method works correctly are presented in order
to avoid excessives sampling rates. In addition, classical problems regarding to the
one-terminal traveling wave-base methods, such as faults very close to the line ends and
the traveling wave propagation velocity estimation on the transmission lines, are analyzed
and solutions to such problems are presented. The proposed methods evaluation is realized
by means of computational simulations. The results demonstrate the fast action of the
proposed scheme, the existence of protection zones due to the sampling process and that
the proposed scheme not need of the knowledge of the traveling wave propagation velocity,
which makes the method immune to the inaccuracies in the traveling wave velocity
estimation and independent of the transmission line parameters.

MEMBROS DA BANCA:
Presidente - 1807863 - FLAVIO BEZERRA COSTA
Interno - 1196444 - RICARDO LUCIO DE ARAUJO RIBEIRO
Externo ao Programa - 1569480 - JOSSANA MARIA DE SOUZA FERREIRA
Externo à Instituição - JOSÉ CARLOS DE MELO VIEIRA JÚNIOR - USP
Externo à Instituição - RODRIGO PRADO DE MEDEIROS - UFERSA
Notícia cadastrada em: 25/06/2018 09:51
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