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The modular multilevel converter (MMC) mainly run at power frequency (50 or 60Hz) especially in the field of HVDC field. The disadvantage of cell capacitor voltage fluctuation at low frequency blocks the kind of convertor applied at AC motor drive. This paper uses a set of control novel scheme to restrain the fluctuation and make MMC to drive induction motor running from standstill to grid frequency.
By now the modular multilevel converter (MMC) is mainly applied to high frequency applications (50 or 60Hz) especially in the field of HVDC systems. This paper presents a control scheme for modular multilevel converter, which allows the converter to operate at continuous coverage in the 0Hz to 50Hz frequency band.
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