The impact of system voltage on the ageing of all-dielectric self-supporting cables on overhead lines

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

    Abstract

    The non-metallic optical cables strung between high voltage towers, independent of the phase conductors, are known as all-dielectric self-supporting (ADSS) cables. These cables have been widely deployed for 20 years, and have been found to provide optically reliable systems. One key limitation, however, is that the proximity of the phase conductors results in capacitively coupled currents the cables' surface. This current can be large enough (of the order of mA) so that damage can result from dry-band arcing. Traditionally the threat of damage to a cable has been defined by the system voltage. In this paper models, practical experiments and service experience are used to show that this approach is not appropriate and that it is current which truly defines the threat. In some circumstances the environment can lead to significantly higher currents than the system voltage might suggest, and so shorter life than otherwise expected may result. ©2008 IEEE.
    Original languageEnglish
    Title of host publicationConference Record of IEEE International Symposium on Electrical Insulation|Conf Rec IEEE Int Symp Electr Insul
    PublisherIEEE
    Pages641-644
    Number of pages3
    DOIs
    Publication statusPublished - 2008
    Event2008 IEEE International Symposium on Electrical Insulation, ISEI 2008 - Vancouver, BC
    Duration: 1 Jul 2008 → …

    Conference

    Conference2008 IEEE International Symposium on Electrical Insulation, ISEI 2008
    CityVancouver, BC
    Period1/07/08 → …

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