Robust thyristor-controlled series capacitor controller design based on linear matrix inequality for a multi-machine power system

Masachika Ishimaru, Ryuichi Yokoyama, Goro Shirai, Takahide Niimura

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    23 Citations (Scopus)


    Power system stabilizing control has an important role in maintaining synchronism in power systems during major disturbances resulting from sudden changes of load and configuration. The thyristor-controlled series capacitor (TCSC) is one of the representative devices in flexible AC transmission systems. In this paper, robust TCSC controllers are applied to suppress disturbances in realistic power systems. H control is adopted as the methodology of the robust controller design along with a linear matrix inequality (LMI), which solves the Lyapunov inequality without the weighting coefficients used in other control theories. In the proposed design, load changes are treated as a system uncertainty in the LMI approach. The proposed LMI-based approach is shown to be effective in the design of TCSC controllers to enhance robustness and response by simulations on a test system.

    Original languageEnglish
    Pages (from-to)621-629
    Number of pages9
    JournalInternational Journal of Electrical Power and Energy Systems
    Issue number8
    Publication statusPublished - 2002 Oct



    • Linear matrix inequality
    • Thyristor-controlled series capacitor
    • Transient stability

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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