Finite-Set Quasi-Sliding Mode Predictive Control of LC-Filtered Voltage Source Inverters

Changming Zheng, Zheng Gong, Xiaojie Wu, Tomislav Dragicevic, José Rodriguez, Frede Blaabjerg

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    Abstract

    Three-phase voltage source inverters (VSIs) with output LC filter are preferred topologies to provide voltage and frequency support for islanded ac microgrids. This article proposes a finite-set quasi-sliding model predictive control (FS-QSMPC) scheme for LC-filtered VSIs to improve the output-voltage quality. By explicitly including a predictive sliding-mode function into the cost function, reduced steady-state ripple and enhanced robustness are achieved compared to typical FS-MPC. Besides, theoretical analysis of stability and robustness for FS-QSMPC is given. Analytical tuning of the weighting factor is also derived to decrease the tuning effort. Comparative simulations and experiments verify the presented approach.
    Original languageEnglish
    JournalIEEE Transactions on Industrial Electronics
    Volume69
    Issue number12
    Pages (from-to)11968-11978
    ISSN0278-0046
    DOIs
    Publication statusPublished - 2022

    Keywords

    • Model predictive control (MPC)
    • Sliding mode control (SMC)
    • Stability analysis
    • Weighting factor design

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