Touch voltages and earth fault currents in a rural large-scale underground cable network with connected earthing systems

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Paper number
1386
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Reikko, Jyrki, Caruna Oy, Finland
Keskinen, Antti, Caruna Oy, Finland
Ristimäki, Rauno, Caruna Oy, Finland
Abstract
Several long power outages caused by storms led to changes in the Finnish Electricity Market Act in 2013 bringing stricter obligations considering the power outages caused by heavy wind, storm or snow load. New requirements have substantially increased the use of underground cables in medium voltage networks in rural areas where the network has traditionally been overhead lines. Underground cabling changes the structure of the rural earthing network and long cable feeders also bring new electrical phenomena to the network. Caruna, the biggest distribution system operator in Finland, organized two field tests in two different locations to study touch voltages and earth fault currents in its large-scale underground networks. The findings of those field measurements are presented in this paper.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/392
http://dx.doi.org/10.34890/616
ISSN
2032-9644
ISBN
978-2-9602415-0-1