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    Fault isolation in distributed generation connected distribution networks

    Access Status
    Fulltext not available
    Authors
    Dewadasa, M.
    Ghosh, Arindam
    Ledwich, G.
    Wishart, M.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Dewadasa, M. and Ghosh, A. and Ledwich, G. and Wishart, M. 2011. Fault isolation in distributed generation connected distribution networks. IET Generation, Transmission and Distribution. 5 (10): pp. 1053-1061.
    Source Title
    IET Generation, Transmission and Distribution
    ISSN
    1751-8687
    URI
    http://hdl.handle.net/20.500.11937/4239
    Collection
    • Curtin Research Publications
    Abstract

    Protection of a distribution network in the presence of distributed generators (DGs) using overcurrent relays is a challenging task because of the changes in fault current levels and reverse power flow. Specifically, in the presence of current limited converter interfaced DGs, overcurrent relays may fail to isolate the faulted section either in grid connected or islanded mode of operation. In this study, a new inverse-type relay is presented to protect a distribution network, which may have several DG connections. The new relay characteristic is designed based on the measured admittance of the protected line. The relay is capable of detecting faults under changing fault current levels. The relay performance is evaluated using PSCAD simulation and laboratory experiments.

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