Some considerations regarding the installed environment of underground power cables

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    Cable ampacity issues have been dealt with for a long time and our own involvement, in large part to provide information of local relevance to the cable industry and power companies in Finland, is quite recent. Nevertheless, in investigating the local environmental conditions of underground HV and MV cables, a number of practical issues worth stressing have come up. Further, in acknowledgement of the difficulty in knowing th
    e actual thermal conditions of a cable at any given point in time, a simple temperature monitoring system has been devised, based on on-line current
    and cable surface temperature measurements. This monitoring system involves a simple transient algorithm that enables quite accurate prediction of the conductor temperature. The conductor temperature corresponds to the maximum temperature of the insulation, and is therefore the critical parameter in determining the current rating of a power cable.
    This paper therefore follows two main themes. In order to highlight an area that is easily overlooked in practical cable installation, the effect of the native soil environment of a typical HV cable installation is investigated. The other aim is
    to provide some practical advice on the installation of the temperature monitoring system, which may be based on surface temperature measurements or distributed optical fibre temperature sensing located inside the cable sheath. Finite element method modelling was used in the simulations that provide the material for this paper.
    Original languageEnglish
    Title of host publicationCIRED, 17th International Conference & Exhibition on Electricity Distribution, Barcelona, Spain, May 12 15, 2003
    Number of pages5
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference and Exhibition on Electricity Distribution -
    Duration: 1 Jan 1900 → …

    Conference

    ConferenceInternational Conference and Exhibition on Electricity Distribution
    Abbreviated titleCIRED
    Period01/01/1900 → …

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  • Cite this

    Millar, J., & Lehtonen, M. (2003). Some considerations regarding the installed environment of underground power cables. In CIRED, 17th International Conference & Exhibition on Electricity Distribution, Barcelona, Spain, May 12 15, 2003 http://www.cired.net/publications/cired2003/reports/R%201-90.pdf