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    Lightning protection of unshielded overhead medium voltage power lines in South Africa

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    CIRED 2019 - 263.pdf (310.7Kb)
    Paper number
    263
    Conference name
    CIRED 2019
    Conference date
    3-6 June 2019
    Conference location
    Madrid, Spain
    Peer-reviewed
    Yes
    Metadata
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    Authors
    Beutel, Andreas, Eskom Holdings SOC Ltd, South Africa
    McLaren, Bruce, Eskom Holdings SOC Ltd, South Africa
    Geldenhuys, Hendri, Eskom Holdings SOC Ltd, South Africa
    Dirkse Van Schalkwyk, Willem, Eskom Holdings SOC Ltd, South Africa
    Van Coller, John, University of Witwatersrand, South Africa
    Abstract
    South Africa has an extensive overhead electricity distribution network at medium voltage (MV). It also has a significant amount of lightning in most areas. The purpose of this paper is to report on South African experiences with respect to lightning protection of its overhead MV power network, and how designing a line for acceptable lightning performance impacts other aspects such as bird safety, pollution performance and terminal equipment reliability. Strategies covered include different insulation levels, bonding and earthing arrangements and pole-top configurations. Experiences from the laboratory and the field are included. It is concluded that the presently used configuration of a partially bonded structure with lightning insulation level of 300 kV performs more than adequately, but that initial experience with alternative configurations indicates that the network performance could be optimised.
    Publisher
    AIM
    Date
    2019-06-03
    Published in
    • CIRED 2019 Conference
    Permanent link to this record
    https://cired-repository.org/handle/20.500.12455/782
    http://dx.doi.org/10.34890/1003
    ISSN
    2032-9644
    ISBN
    978-2-9602415-0-1

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