Análise da Aplicabilidade de Relé Direcional de Sobrecorrente sem Referência de Tensão em Microrredes (Applicability Analysis of Directional Overcurrent Relay without Voltage Reference in Microgrids)

Leandro de Marchi Pintos (leandro.eie@gmail.com)1, Miguel Moreto (moreto@labspot.ufsc.br)1, Jacqueline Gisèle Rolim (jackie@labspot.ufsc.br)1


1Universidade Federal de Santa Catarina

This paper appears in: Revista IEEE América Latina

Publication Date: Feb. 2016
Volume: 14,   Issue: 2 
ISSN: 1548-0992


Abstract:
This paper presents an approach for identifying the direction of faults with only current measurements in distribution networks in the presence of distributed generation. The proposed protection system guarantees protection selectivity in distribution systems considering the possibility of fault currents in both directions of the distribution lines. Firstly, the methodology of directional protection is developed and discussed. Subsequently the performance and efficiency of the directional protection tool is evaluated through its application for a test system based on a real system. Single phase and three phase faults have been simulated and the results demonstrate that the use of the directional protection system with only current measurement in distribution networks is feasible and a promising approach for selectivity and coordination of relays.

Index Terms:
Power systems protection, Directional Protection, Current-Only Directional Overcurrent Relay   


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