Banca de DEFESA: RAFAEL LUCAS DA SILVA FRANCA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : RAFAEL LUCAS DA SILVA FRANCA
DATA : 28/02/2023
HORA: 10:00
LOCAL: Online
TÍTULO:

One-Terminal TravelingWave-Based Protection for HVAC and HVDC Transmission Lines

PALAVRAS-CHAVES:

Transmission line protection, traveling waves, one-terminal protection, distance
protection, fault location, HVAC systems, meshed HVDC systems, protection selectivity.

PÁGINAS: 100
RESUMO:

This work proposes the development of one-terminal traveling wave-based transmission line
protection methods for HVAC (High Voltage Alternating Current) and HVDC (High Voltage
Direct Current) systems. The effect of the sampling frequency on the protection is considered,
which until now has not yet been investigated for one-terminal methods. Inaccuracies on the
wave velocity estimations, which classically yields to problems on methods based on traveling
waves, are addressed and solutions to such problem are presented. The proposed methods have
been evaluated by means of computer simulations. The proposed earth fault distance protection
for HVAC transmission lines was evaluated using a real commercial relay with time domain
based protection functions. The results related to the proposed earth fault distance protection
for HVAC transmission lines show that the proposed function, when associated with other existing
protection functions, can achieve a quite remarkable enhancement for the dependability and
velocity of the transmission line protection. The results concerning the method based on traveling
wave reflections show that it is possible to protect most point-to-point transmission lines in
a fast way, without the need for communication, and independent of the estimation of the wave
speed. Finally, the results concerning distance protection for meshed HVDC systems demonstrate
the applicability of the proposed method for such systems. The method showed operating
time below 2 ms for a line of 500 km length. This operation time meets the likely requirements
that HVDC meshed systems will present. In addition, the method presented selectivity for a
4-terminal system interconnected by 5 transmission lines.

MEMBROS DA BANCA:
Presidente - 1807863 - FLAVIO BEZERRA COSTA
Interno - 1543191 - LUIZ FELIPE DE QUEIROZ SILVEIRA
Externo à Instituição - DIRK VAN HERTEM
Externo à Instituição - FELIPE VIGOLVINO LOPES - UFPB
Externo à Instituição - KAI STRUNZ
Externo à Instituição - WASHINGTON ARAUJO NEVES