Sensitivity analysis of secondary arc current for different transmission lines / Analise de sensibilidade da corrente de arco secundario para diferentes linhas de transmissão

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The secondary arc appears in single-phase switching during clearing of non-permanent ground single-phase to ground faults. The problem happens especially on EHV lines, on aerial isolation, in faults with non permanent characteristics. In this work different transmission lines with voltage levels of 345 kV up to 765 kV and with 150 km up to 900 km length are analyzed, varying its level of reactive shunt compensation from 40 % up to 100 % and for the longest lines compensating 50 % of its longitudinal impedance. In EHV lines with have reactive shunt compensation, it is possible to add a neutral reactor in order to minimize the phase coupling of the transmission lines, being this coupling the main cause for the maintenance of the secondary arc current. With optimal values of neutral reactors it was possible to minimize the secondary arc current and evaluate the viability of the application of the single-phase reclosure in the systems under study, increasing the performance and reliability of the electrical systems

ASSUNTO(S)

eletricidade matrizes (matematica) energia eletrica - transmissão single-phase reclosure two ports circuits linhas eletricas aereas reatores eletricos neutral reactor secundary arc reactive shunt compensation

ACESSO AO ARTIGO

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