Modelling and analysis of switching overvoltages caused by short circuits in MV cables connected with overhead lines

Murtaza Hashmi, M. Lehtonen, Seppo Hänninen

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    In this paper, overvoltage transients are investigated and mitigated when a three-phase short-circuit occurs in cable lateral connected with medium voltage (MV) overhead line and fuse is operated. The transients are studied using EMTP-ATP simulation environment and the need of metal oxide varistors (MOVs) is investigated. The cable laterals consist of sub-laterals and their effect on reducing transients is also investigated. The surge arresters are installed at the junction of overhead line and cable and at far end of the cable near short-circuit point. The different mitigation methods are tested and optimal protection scheme to reduce overvoltages is proposed on the basis of surge arresters locations and sub-lateral connections.
    Original languageEnglish
    Pages (from-to)107-110
    Number of pages4
    JournalElektronika ir Elektrotechnika
    Volume107
    Issue number1
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed

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