This paper presents an experimental discussion on modular multilevel cascade converters based on double‐star chopper cells (MMCC‐DSCC). Hereinafter, a single MMCC‐DSCC is referred to simply as a “DSCC”. A couple of DSCCs are used to form a front‐to‐front (FTF) system capable of dc voltage matching and galvanic isolation between two dc grids. The FTF system can be considered as a dc–ac–dc power conversion system including an ac‐link high‐power transformer. The higher the ac‐link frequency, the smaller and lighter are the ac‐link transformer and dc capacitors. When the so‐called “phase‐shifted‐carrier PWM” is applied to the DSCC, theoretical analysis and computer simulation have confirmed that a ratio of the carrier frequency with respect to the ac‐link frequency can be reduced to 5/2. This paper designs, constructs, and tests a 400‐Vdc 10‐kW downscaled FTF system with a carrier frequency of 450 Hz and an ac‐link frequency of 180 Hz, where their ratio is 5/2. Experimental waveforms obtained from the downscaled system are compared with simulated ones obtained from a software package, PSCAD/EMTDC, under the same operating and circuit conditions. They agree well each other not only under steady states but also under transient states.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental Verification of a Front‐to‐Front (FTF) System Consisting of Two Modular Multilevel Cascade Converters Based on Double‐Star Chopper Cells



    Published in:

    Publication date :

    2016




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    53.00 / 53.33 / 52.53 Kraftwerkstechnik / 53.31 / 52.53 / 53.33 Elektrische Maschinen und Antriebe / 53.00 Elektrotechnik: Allgemeines / 53.31 Elektrische Energieübertragung
    Local classification TIB:    770/5600/8000