Banca de QUALIFICAÇÃO: SAMUEL SIMÕES BRITO DE AZEVEDO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : SAMUEL SIMÕES BRITO DE AZEVEDO
DATE: 10/12/2019
TIME: 09:00
LOCAL: Sala 4 da ECT
TITLE:

A Traveling-Wave Detection Method Based On Redundant Wavelet Transform Applied to Three-Phase Transmission Line Experimental Test Bench

KEY WORDS:

Fault-induced transients, traveling waves, wavelet transform, transmission line protection, fault detection and location.

PAGES: 100
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
SPECIALTY: Transmissão da Energia Elétrica, Distribuição da Energia Elétrica
SUMMARY:

Traveling-wave detection methods have been widely studied in recent years due to the implementation of traveling-wave-based protection and fault location schemes applied to transmission systems since they are faster and more accurate than traditional schemes employed by power companies. Researchers have been developed traveling-wave detection methods by using the most varied digital signal processing techniques.  This work proposes a traveling wave detection method, based on redundant wavelet transform, and applied to experimental data, which is extracted from a three-phase transmission line. The proposed method utilizes high-sampling frequency to detect the first incident wavefront, even as the subsequent ones due to reflections at line terminals and at fault point. The experimental test bench is composed of a three-phase alternate current source, a one kilometer long four-wire polypropylene-type flexible copper cable, which enables the traveling-wave propagation phenomenon, a load resistance, and fault resistance. The fault switching is realized by pressing a push-button. Currents and voltages are measured by means of transducers connected to one of the line terminals, the fault point, and an oscilloscope. Therefore, fault transient signals are acquired, stored, and can be offline analyzed. Handling this setup, it is possible to control the distance that fault occurs, the fault type, as well as the fault resistance and the fault incidence angle.

BANKING MEMBERS:
Presidente - 1807863 - FLAVIO BEZERRA COSTA
Interno - 1543191 - LUIZ FELIPE DE QUEIROZ SILVEIRA
Externo à Instituição - RODRIGO PRADO DE MEDEIROS - UFERSA
Externo à Instituição - WASHINGTON LUIZ ARAUJO NEVES - UFCG