Earth Fault Location Using Negative Sequence Currents

Amir Farughian, Lauri Kumpulainen and Kimmo Kauhaniemi
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Amir Farughian: School of Technology and Innovations, University of Vaasa, 6500 Vaasa, Finland
Lauri Kumpulainen: School of Technology and Innovations, University of Vaasa, 6500 Vaasa, Finland
Kimmo Kauhaniemi: School of Technology and Innovations, University of Vaasa, 6500 Vaasa, Finland

Energies, 2019, vol. 12, issue 19, 1-14

Abstract: In this paper, a new method for locating single-phase earth faults on non-effectively earthed medium voltage distribution networks is proposed. The method requires only current measurements and is based on the analysis of the negative sequence components of the currents measured at secondary substations along medium voltage (MV) distribution feeders. The theory behind the proposed method is discussed in depth. The proposed method is examined by simulations, which are carried out for different types of networks. The results validate the effectiveness of the method in locating single-phase earth faults. In addition, some aspects of practical implementation are discussed. A brief comparative analysis is conducted between the behaviors of negative and zero sequence currents along a faulty feeder. The results reveal a considerably higher stability level of the negative sequence current over that of the zero sequence current.

Keywords: sequence components; earth fault location; negative sequence current (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: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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