Non-Directional Earth Fault Passage Indication in Isolated Neutral Distribution Networks

Amir Farughian, Lauri Kumpulainen and Kimmo Kauhaniemi
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Amir Farughian: School of Technology and Innovations, University of Vaasa, 65200 Vaasa, Finland
Lauri Kumpulainen: School of Technology and Innovations, University of Vaasa, 65200 Vaasa, Finland
Kimmo Kauhaniemi: School of Technology and Innovations, University of Vaasa, 65200 Vaasa, Finland

Energies, 2020, vol. 13, issue 18, 1-10

Abstract: In this paper, two new methods for locating single-phase to ground faults in isolated neutral distribution networks are proposed. The methods are based on the analysis of symmetrical sequence currents. They are solely based on currents, not requiring voltage measurement. The first method employs only the zero sequence current and the second one utilizes the negative sequence current in combination with the zero sequence current. It is revealed why using only zero sequence current with a simple threshold is insufficient and may lead to false results. Using the proposed methods, earth faults with high resistances can be located in isolated neutral distribution networks with overhead lines or cables.

Keywords: fault passage indication; fault location; symmetrical sequence currents (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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