Distributed Event-triggered Control for Reactive, Unbalanced and Harmonic Power Sharing in Islanded AC Microgrids

Jinghang Lu, Ming Zhao, Saeed Golestan, Tomislav Dragicevic, Xuewei Pan, Josep M. Guerrero

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    Abstract

    For several reasons, particularly due to the mismatch in the feeder impedance, accurate power sharing in islanded microgrids is a challenging task. To get around this problem, a distributed event-triggered power sharing control strategy is proposed in this paper. The suggested technique adaptively regulates the virtual impedances at both fundamental positive/negative sequence and harmonic frequencies and, therefore, accurately share the reactive, unbalanced, and harmonics powers among distributed generation (DG) units. The proposed method requires no information of feeder impedance and involves exchanging information between units at only event-triggered times, which reduces the communication burden without affecting the system performance. The stability and inter-event interval are analyzed in this paper. Finally, experimental results are presented to validate the effectiveness of the proposed scheme.
    Original languageEnglish
    JournalIEEE Transactions on Industrial Electronics
    Volume69
    Issue number2
    Pages (from-to)1548 - 1560
    ISSN0278-0046
    DOIs
    Publication statusPublished - 2021

    Keywords

    • Event-triggered control
    • Distributed generation
    • Droop control
    • Microgrid
    • Power sharing
    • Virtual impedance

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