Earth potential rise influence near HV substations in rural areas

In rural areas, the multigrounded neutral of MV lines transfer a significant fraction of the substation EPR over distances typically exceeding 1 km. MV lines, particularly in HV/MV substations, contribute to limit the EPR and touch voltages within safe limits. However, mitigation measures may be req...

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Bibliographic Details
Published in18th International Conference and Exhibition on Electricity Distribution (CIRED 2005)
Main Authors Rajotte, Y, De Seve, J, Fortin, J, Lehoux, R, Simard, G
Format Conference Proceeding
LanguageEnglish
Published Stevenage IEE 2005
Subjects
Power system protection
Substations
Transmission line links and equipment
electrical safety
multigrounded neutral
earth potential rise
HV substation
earthing system
substations
Hydro-Quebec
telecommunication circuit protection
telecommunication cables
telecommunication networks
safety
earthing
touch voltages
project planning
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Summary:In rural areas, the multigrounded neutral of MV lines transfer a significant fraction of the substation EPR over distances typically exceeding 1 km. MV lines, particularly in HV/MV substations, contribute to limit the EPR and touch voltages within safe limits. However, mitigation measures may be required in some cases particularly in high soil resistivity areas. The concept of zone of influence is not applicable if the telecommunication circuits share the earthing system of the MV network and/or the LV installations. Hydro-Quebec is therefore planning a project aimed at reviewing the methods applied for the protection of telecommunication circuits entering substations. (4 pages)
ISBN:9780863415296
0863415296
DOI:10.1049/cp:20051000