Novel Earth Fault Protection Algorithm Based on MV Cable Screen Zero Sequence Current Filter

Krzysztof Lowczowski, Jozef Lorenc, Jerzy Andruszkiewicz, Zbigniew Nadolny and Jozef Zawodniak
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Krzysztof Lowczowski: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Jozef Lorenc: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Jerzy Andruszkiewicz: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Zbigniew Nadolny: Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Jozef Zawodniak: Enea Operator, Department of Network Asset Management, 60-479 Poznan, Poland

Energies, 2019, vol. 12, issue 16, 1-20

Abstract: This paper presents novel zero sequence current filter and earth fault protection relay, which utilize cable screens earthing current in protection algorithm. Different problems connected with state of the art of zero sequence current filters and protection relays are presented and compared with the proposed solution. The presented concept is verified in PowerFactory simulation software, experiment concerning modeling the earth fault current flow in medium voltage (MV) cable supplied from the low voltage (LV) network and measurements in the MV network in the Polish distribution system. The proposed solution is characterized by higher sensitivity and reduced number of erroneous trips. The presented solution is suitable for any MV cable lines. Biggest advantages are observed in power output lines from renewable energy sources, which are often operated under no-load conditions.

Keywords: cable screen; earthing system; zero sequence filters/transformers; protection relays; current measurement (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 references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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