The invention provides a cascaded multilevel converter with interconnected single-phase direct-current ports. The cascaded multilevel converter comprises a first single-phase double-winding transformer, two cascaded multilevel voltage source type converter sets and a reactor set located on the alternating-current side of any one or two converter sets. Each cascaded multilevel voltage source type converter set comprises a plurality of single-phase voltage source converters, the alternating current side of the first cascaded multilevel voltage source type converter set is connected to a single-phase power grid power supply through a first single-phase double-winding transformer, and the alternating current side of the second cascaded multilevel voltage source type converter set is connectedto another single-phase power grid power supply. And a direct-current filter bank is also arranged between the direct-current sides of the two cascaded multilevel voltage source type converter banks.And a second single-phase double-winding transformer or an alternating-current filter is arranged on the alternating-current side of the second cascaded multilevel voltage source type converter groupand is used for supplying power to the single-phase passive power grid. The cascaded multilevel converter has the advantages of good harmonic characteristics of alternating current ports on two sides,high operating efficiency in a full-load range, low loss, high reliability in fault locking and redundant operation and the like.

    本发明提出的一种单相直流端口互联的级联多电平变流器,包括第一单相双绕组变压器、两个级联多电平电压源型变流器组和位于任一或两个变流器组交流侧的电抗器组;各级联多电平电压源型变流器组均分别包括若干单相电压源变流器,第一级联多电平电压源型变流器组交流侧通过第一单相双绕组变压器接入单相电网电源,第二级联多电平电压源型变流器组交流侧接入另一单相电网电源。在两级联多电平电压源型变流器组直流侧间还设有直流滤波器组。在第二级联多电平电压源型变流器组交流侧设置第二单相双绕组变压器或交流滤波器用于为单相无源电网供电。本发明具有两侧交流端口谐波特性好,全负荷范围运行效率高、损耗小,故障闭锁及冗余运行可靠性强等特点。


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    Titel :

    Cascaded multilevel converter with interconnected single-phase direct-current ports


    Weitere Titelangaben:

    单相直流端口互联的级联多电平变流器


    Beteiligte:
    LI WEIRUI (Autor:in) / WEI YINGDONG (Autor:in) / HU CHANGJIANG (Autor:in) / LI XIAOQIAN (Autor:in) / ZHANG QUANLIQING (Autor:in) / LU CHAO (Autor:in) / YUAN ZHICHANG (Autor:in) / MA HUIYUAN (Autor:in) / YU XIJUAN (Autor:in)

    Erscheinungsdatum :

    2020-06-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    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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