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    Evaluation of temperature rise in continuously loaded distribution earthing electrodes

    Access Status
    Fulltext not available
    Authors
    Noorudheen, N.
    Wolfs, Peter
    Alahakoon, S.
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Noorudheen, N. and Wolfs, P. and Alahakoon, S. 2016. Evaluation of temperature rise in continuously loaded distribution earthing electrodes.
    Source Title
    Proceedings of the 2016 Australasian Universities Power Engineering Conference, AUPEC 2016
    DOI
    10.1109/AUPEC.2016.07749318
    ISBN
    9781509014057
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/55877
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 IEEE. This paper examines the relationship of current densities and temperature rise in continuously loaded earth electrodes as may be applied in Single Wire Earth Return (SWER) systems. The existing design practice for electrodes has been based on some fundamental calculations related to resistance and voltage rise and industrial experience. There is no comprehensive design method that relates the intensity of the electrode loading and the service life. An analytical model of a hemispherical electrode is established. The temperature rise is proportional to the soil thermal resistivity and electrical resistivity and the square of the electrode current. The final temperature will largely determine the loss of soil moisture which is a major factor in the failure of electrodes. The analytical model provides guidance as to current densities that are likely to result in long electrode lifetimes.

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