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    CONTROL METHOD FOR MULTI-LEVEL CONVERTER
    37.
    发明公开
    CONTROL METHOD FOR MULTI-LEVEL CONVERTER 审中-公开

    公开(公告)号：EP4016827A1

    公开(公告)日：2022-06-22

    申请号：EP21798927.6

    申请日：2021-05-26

    申请人： The 13th Research Institute Of China Electronics Technology Group Corporation

    发明人： GU, Zhanbiao ,  ZHANG, Zhiliang ,  CHENG, Shipeng ,  REN, Xiaoyong ,  XU, Senfeng ,  TAN, Chao

    IPC分类号： H02M3/07

    摘要： A multi-level converter control method is provided that includes: acquiring an inductive current of an LC filter in a driving pulse period; determining a to-be-adjusted first switch tube and a first duty ratio adjustment amount of the to-be-adjusted first switch tube based on a slope of a rising period of the inductive current, and adjusting a duty ratio of the to-be-adjusted first switch tube based on the first duty ratio adjustment amount; and determining a to-be-adjusted second switch tube and a second duty ratio adjustment amount of the to-be-adjusted second switch tube based on a slope of a falling period of the inductive current, and adjusting a duty ratio of the to-be-adjusted second switch tube based on the second duty ratio adjustment amount. According to the disclosure, the voltage of each flying capacitor of the multilevel converter can be controlled to be balanced only by acquiring the inductive current of the LC filter, and the implementation method is simple and is not influenced by the level number of the multilevel converter.