Voltage sags matching to locate faults for underground distribution networks

Hazlie Mokhlis, Hasmaini Mohamad, Haiyu Li, Ab Halim Abu Bakar

    Research output: Contribution to journalArticlepeer-review


    A voltage sags matching to locate a fault for underground distribution network is presented in this paper. Firstly the method identifies the faulted section by matching a voltage sags measured at the primary substation during a fault with pre-developed voltage sag database. From the identified faulted section, the distance of a fault from sending-end is calculated. The problem of multiple sections is addressed by ranking approach. Test results on an underground distribution network shows most faults can be located by the first attempt within high accuracy distance. Only few faulted sections found by the second attempt. Since the method is using only voltage sag data, monitored at the primary substation, the method is considers economical to be implemented for a rural distribution network.
    Original languageEnglish
    Pages (from-to)43-48
    Number of pages5
    JournalAdvances in Electrical and Computer Engineering
    Issue number2
    Publication statusPublished - May 2011


    • Fault location
    • Pattern matching
    • Power distribution faults


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