The present application provides an interconnected co-phase traction power supply system based on a four-port modular multilevel converter (4P-MMC), which is constituted by connecting traction busbars of multiple interconnected co-phase traction substations to overhead lines in communication with each other. Each of the interconnected co-phase traction substations comprises traction transformers T1 and T2, and a stationary power converter (SPC) having three input ports and one output port. Three-phase primary ports of T1 and T2 are connected to three phases of a synchronous public alternating current electrical grid by means of circuit breakers. Three-phase secondary ports of T1 and T2 are all connected to the three input ports of the SPC, respectively. The output port of the SPC is connected to the traction busbar. The SPC is constituted by connecting k 4P-MMCs in parallel. Each of the 4P-MMCs comprises four phases. Each phase is constituted by connecting upper and lower legs in series. Neutral points of three phases of each 4P-MMC are respectively connected to corresponding input ports of the SPC by means of a three-phase circuit breaker. A neutral point of a fourth phase of each 4P-MMC is connected to the output port of the SPC by means of a circuit breaker. The present application has advantages of removal of electric phase separation for the entire overhead line, simple connections of traction transformers of substations, and high capacity utilization rate, flexible configuration, high reliability, and low costs of a system device.


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    Titel :

    INTERCONNECTED CO-PHASE TRACTION POWER SUPPLY SYSTEM BASED ON FOUR-PORT MODULAR MULTILEVEL CONVERTER


    Weitere Titelangaben:

    VERBUNDENES GLEICHPHASIGES TRAKTIONSSTROMVERSORGUNGSSYSTEM AUF BASIS EINES MODULAREN MEHRSTUFIGEN VIERPORT-WANDLERS
    SYSTÈME D'ALIMENTATION EN ÉNERGIE DE TRACTION CO-PHASÉ INTERCONNECTÉ FONDÉ SUR UN CONVERTISSEUR MULTINIVEAU MODULAIRE À QUATRE PORTS


    Beteiligte:
    LIN YUNZHI (Autor:in) / WEI YINGDONG (Autor:in) / LI ZENGQIN (Autor:in) / LI XIAOQIAN (Autor:in) / LI MINGRUI (Autor:in) / ZHANG SHUQING (Autor:in) / LU CHAO (Autor:in) / XIE XIAORONG (Autor:in)

    Erscheinungsdatum :

    2024-05-01


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES





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