公开(公告)号：US12034379B2

公开(公告)日：2024-07-09

申请号：US17796847

申请日：2021-02-25

申请人： Hitachi, Ltd.

发明人： Hajime Urai ,  Hiroshi Kamizuma ,  Kimihisa Furukawa ,  Noriya Nakao ,  Kinya Nakatsu

IPC分类号： H02H9/04 ,  H01C7/12 ,  H02H9/06 ,  H02M1/32 ,  H02M7/12 ,  H02M7/537

CPC分类号： H02M7/537 ,  H01C7/12 ,  H02H9/041 ,  H02H9/06 ,  H02M7/12 ,  H02M1/32

摘要： Provided is a power conversion system that can suppress a fault in a short-circuiting switch that bypasses a fault unit and enhance the reliability and redundancy of the system. The power conversion system is provided with a plurality of power converter units that are formed by using semiconductor switch elements and are connected in series, and comprises: switch elements that are provided to input terminals and/or output terminals of the power converter units and bypass the power converter units; and overvoltage suppressing elements which are connected in parallel with the switch elements and in which conducting states are changed by an application of a prescribed voltage.