Utilização da Proteção Diferencial de Linha na Redução do Efeito do Afundamento de Tensão - Estudo de Caso Aplicado ao Sistema Tramo-Oeste da Eletrobras Eletronorte
Vanderson Geraldo Aranha da Silva1; Ubiratan Holanda Bezerra2
1 Centrais Elétricas do Norte do Brasil S.A - Eletrobras Eletronorte; 2 Universidade Federal do Pará - UFPA
Resumo
Voltage Sags are responsible for much of the damage caused by interruption of production processes in the industry worldwide and should be eliminated as soon as possible by the protection arrangements of transmission networks. This article presents a comparative assessment between the performances of two typical arrangements of transmission lines protection with respect to their impacts in reducing voltage sags duration caused by short circuits in the electric network. The distance protection and the line differential protection arrangements were evaluated, demonstrating that the differential protection is more effective in reducing voltage sags duration. The data analyzed are from occurrences of actual events of short circuits in the Eletrobás Eletronorte Tramo-Oeste Transmission System, in the State of Pará-Brazil.
Palavras-chave: Proteção de distância; Proteção diferencial de linha; Afundamento de tensão