To achieve the voltage compensation of dynamic voltage restorer in the case of three-phase voltage amplitude unbalanced sag, the control strategy for the three-phase four-leg dynamic voltage restorer based third-harmonic injection has been proposed in this paper. To analyze the principle of third-harmonic injection modulation, the dynamic voltage restorer topology of three-phase four-leg has been established. Because the third-harmonic injection modulation can independently regulate each phase, the double closed-loops control strategy with proportional-resonant controllers and the detection method with band-stop filter have been designed for single-phase voltage. The simulation experiments under the circumstance of three-phase voltage amplitude balanced and unbalanced sag have been built respectively, the simulation results have proved that the dynamic voltage restorer system has fantastic capability of voltage compensation.


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    Titel :

    Control Strategy for Three-Phase Four-Leg Dynamic Voltage Restorer Based Third-Harmonic Injection


    Beteiligte:
    Gai, Kuo (Autor:in) / Li, Changyuan (Autor:in) / Zhou, Quanxing (Autor:in) / Liu, Shu (Autor:in) / Bi, Kaitao (Autor:in)


    Erscheinungsdatum :

    2018-06-01


    Format / Umfang :

    5279991 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch