Operation challenges of feeder shunt capacitors in islanded microgrids

Nader A. El-Taweel, H. E. Farag

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

    8 Scopus citations


    Active distribution systems are moving towards a new paradigm shift, where they can be clustered into microgrids capable of operating in both grid-tied and islanded modes depending on the penetration levels and types of the distributed generation (DG) units. Previous studies put on view lots of advantages and concerns for microgrids operation in islanded mode, whether it is initiated for emergency, intentionally planned or permanent island system purposes. One of the concerns that have not been addressed yet, is the functionality of the existing feeders shunt capacitors (FSCs) when microgrids operate in islanded mode. Hence, this paper investigates the operation conflicts between DG units and FSCs during the islanded microgrid mode of operation. These operation conflicts have been validated through conducting simulations for different local control schemes of FSCs. The results show that major voltage regulation and reactive power control problems might arise when DG units are droop-controlled and FSCs utilize conventional control schemes. Further, a new local control scheme for FSCs has been proposed to mitigate their operational challenges in islanded microgrids.

    Original languageBritish English
    Title of host publication2015 IEEE Electrical Power and Energy Conference
    Subtitle of host publicationSmarter Resilient Power Systems, EPEC 2015
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Number of pages6
    ISBN (Electronic)9781479976645
    StatePublished - 12 Jan 2016
    EventIEEE Electrical Power and Energy Conference, EPEC 2015 - London, Canada
    Duration: 26 Oct 201528 Oct 2015

    Publication series

    Name2015 IEEE Electrical Power and Energy Conference: Smarter Resilient Power Systems, EPEC 2015


    ConferenceIEEE Electrical Power and Energy Conference, EPEC 2015


    • Distributed generation
    • Droop control
    • Feeder shunt capacitors
    • Islanded microgrid
    • Volt/Var control


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