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    METHOD AND COMPUTER PROGRAM FOR DETECTING A SHORT-CIRCUIT IN A POWER CONVERTER, CONTROLLER FOR CONTROLLING A POWER CONVERTER, AND COMPUTER-READABLE MEDIUM
    1.
    发明公开
    METHOD AND COMPUTER PROGRAM FOR DETECTING A SHORT-CIRCUIT IN A POWER CONVERTER, CONTROLLER FOR CONTROLLING A POWER CONVERTER, AND COMPUTER-READABLE MEDIUM 审中-公开

    公开(公告)号：EP4475414A1

    公开(公告)日：2024-12-11

    申请号：EP23177505.7

    申请日：2023-06-06

    Applicant: ABB SCHWEIZ AG

    Inventor： VETTERLI, Manuel ,  REIGOSA, Paula Diaz ,  ABRACH, Stefan ,  LUESCHER, Matthias

    IPC: H02M1/32 ,  H02M7/5387 ,  G01R31/42 ,  G01R31/52

    Abstract: A method for detecting a short-circuit (18) in a power converter (20) is provided. The power converter (20) comprises a first DC terminal (22), a second DC terminal (24), an AC terminal (26), a first semiconductor switch (S 1) electrically coupled to the first DC terminal (22) and the AC terminal (26), a second semiconductor switch (S2) electrically coupled to the second DC terminal (24) and the AC terminal (26), and an inductance. The method comprises: sending a turn-on signal (ON) to the first semiconductor switch (S 1) for turning on the first semiconductor switch (S 1) and a turn-off signal (OFF) to the second semiconductor switch (S2) for turning off the second semiconductor switch (S2); receiving a voltage signal which is representative for a switch voltage (v S1 , v S2 ) measured over the first semiconductor switch (S 1) and the second semiconductor switch (S2); determining an inductance voltage (V L ) over the inductance depending on the measured switch voltage (v S1 , v S2 ) and a DC voltage (V DC ) between the first and second DC terminals (24); determining a current (isc) flowing through the semiconductor switches (S 1, S2) depending on the determined inductance voltage (V L ); and determining that the short-circuit (18) is present depending on a predetermined current threshold.

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