Power converter and power system

Power converter (100) comprises a first arm comprising a transducer cells respectively (4) and the second arm (5). Each transducer cells constituting the first arm 4, the energy storage element (20), the semiconductor switching elements (21s, 22s, 23s, 24s) and be first transducer cells of a full bridge configuration (10) having a , each transducer cell constituting the second arm (5) is an energy storage element (20), the semiconductor switching elements (41s, 42s, 51 s, 52s) and a second transducer cell (15 half-bridge configuration having a ), and it suppresses the short-circuit current between the DC terminals.