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    IMPROVED MODULAR MULTILEVEL CONVERTER
    2.
    发明申请
    IMPROVED MODULAR MULTILEVEL CONVERTER 审中-公开

    公开(公告)号：WO2020007516A1

    公开(公告)日：2020-01-09

    申请号：PCT/EP2019/060495

    申请日：2019-04-24

    Applicant: ABB SCHWEIZ AG

    Inventor： OKAZAKI, Yuhei ,  ILVES, Kalle ,  BAKAS, Panagiotis ,  SHUKLA, Anshuman

    IPC: H02M7/483 ,  H02M7/49 ,  H02M7/497 ,  H02P27/14

    Abstract: A voltage source converter comprises a number of converter modules, one for each phase of an AC waveshape to be generated, connected between two DC terminals and each comprising a first and a second DC connection point (DCCP1, DCCP2), a string of director switches (S1, S2), the midpoint of which provides a third connection point (CP3), and waveshaper branches (WSB1, WSB2) connected in parallel with each other as well as to the string, each waveshaper branch (WSB1, WSB2) comprising submodules (SMA1, SMA2, SMA3, SMA4, SMB1, SMB2, SMB3, SMB4) and being connected to an AC connection point (ACCP1, ACCP2) provided for the branch, wherein at least one of the AC connection point and the third connection point is provided for connection to a corresponding phase of an AC link, the first and second waveshaper branches produce two similar waveshapes for the AC link and the switches change the way the waveshapes are applied to connection points.

    SUBMODULE FOR A MODULAR MULTILEVEL CONVERTER
    3.
    发明申请
    SUBMODULE FOR A MODULAR MULTILEVEL CONVERTER 审中-公开

    公开(公告)号：WO2019007475A1

    公开(公告)日：2019-01-10

    申请号：PCT/EP2017/066442

    申请日：2017-07-03

    Applicant: ABB SCHWEIZ AG

    Inventor： ILVES, Kalle ,  HARNEFORS, Lennart ,  BAKAS, Panagiotis

    IPC: H02M7/483 ,  H02M1/34 ,  H02M7/515

    Abstract: A submodule (SMA) for a modular multilevel converter comprises a capacitor(C SM ),a first group of series-connected switching units and a first chain link branch comprising a first chain-link (CL 1 ),wherein the first group of switching units is connected in parallel with the capacitor (C SM) and where a first switching unit (SU 1 ,) comprises a first switching element (T 1 ) with a first anti-parallel unidirectional conducting element (D 1 ) and a second switching unit (SU 2 ) comprises a second switching element (T 2 ) with a second anti-parallel unidirectional conducting element (D2),the first switching element (T 1 ) is controllable to be turned on via a control terminal and to be turned off through reverse-biasing, and the first chain link branch is connected in parallel with the first switching unit (SU 1 ) and the first chain link (CL 1 ) comprises cascaded cells controllable to provide voltage contributions combinable to form positive and negative voltages across the first switching element.

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