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Electromechanical Analysis of the Medium Voltage Earthing Switch due to Short-Time and Peak Withstand Current Test
Open AccessArticle

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

1
Faculty of Electrical Engineering, Poznan University of Technology, 60-965 Poznan, Poland
2
Enea Operator, Department of Network Asset Management, 60-479 Poznan, Poland
*
Author to whom correspondence should be addressed.
Energies 2019, 12(16), 3190; https://doi.org/10.3390/en12163190
Received: 12 July 2019 / Revised: 8 August 2019 / Accepted: 13 August 2019 / Published: 20 August 2019
(This article belongs to the Section Electrical Power and Energy System)
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. View Full-Text
Keywords: cable screen; earthing system; zero sequence filters/transformers; protection relays; current measurement cable screen; earthing system; zero sequence filters/transformers; protection relays; current measurement
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MDPI and ACS Style

Lowczowski, K.; Lorenc, J.; Andruszkiewicz, J.; Nadolny, Z.; Zawodniak, J. Novel Earth Fault Protection Algorithm Based on MV Cable Screen Zero Sequence Current Filter. Energies 2019, 12, 3190.

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