Implementação de um sistema de medição fasorial sincronizada para proteção de retaguarda
This work presents the study and the implementation of a synchronized phasor measurement system in an electric power system (SEP) modeled and simulated in the ATPDraw software. Two methodologies for SEP monitoring were implemented, both of which detect the existence of a fault in the transmission li...
| Autor principal: | Santos, Gilmar de Oliveira |
|---|---|
| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
|
| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/27372 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: |
This work presents the study and the implementation of a synchronized phasor measurement system in an electric power system (SEP) modeled and simulated in the ATPDraw software. Two methodologies for SEP monitoring were implemented, both of which detect the existence of a fault in the transmission line from a criterion of voltage sinking and power flow inversion. Both methodologies used the Discrete Fourier Transform for the extraction of the voltage and current phasors and, from these phasors, the calculations of the positive sequence voltages in the buses and positive sequence currents in the lines were made. In methodology 1 the values of the positive sequence voltage magnitudes of the buses are stored in a vector and, from the location of the lowest value, the bus with the highest voltage sag is found and classified as the probable bus fault. Then, the absolute difference of the positive sequence current angles of the lines connected to the possibly missing bar is calculated to find the power flux inversion, where, if that difference exceeds 30 ° in any of these lines, the algorithm accuses the existence of a fault in this line. Methodology 2 uses the same criterion to find the probable missing bar. However, the power flow inversion indication is given in cases where the angle value of the positive sequence current of one end is changed in one direction when compared to its pre-fault value and the angle of the other end is changed in opposite way. The results obtained were an 83% success rate in the fault indication for methodology 1 and a 89% success rate for methodology 2. |
|---|