| 摘要 |
A current source power conversion apparatus is provided which makes a resonance phenomenon not to be generated even if a float inductance exists in a commutation auxiliary circuit. It is composed of a plurality of switching legs 3, 4, 5. In the respective switching legs, first thyristors 31, 41, 51, first diodes 32, 42, 52, second diodes 33, 43, 53, second thyristors 34, 44, 54 are connected in series from a DC voltage positive side in the order, each of first reverse blocking self-turn-off devices 35, 45, 55 is connected between a connection point of the first thyristor and the first diode and an AC terminal, so that the AC terminal direction is a forward direction, each of capacitors 36, 46, 56 is connected between a connection point of the first diode and the second diode and the AC terminal, and each of second reverse blocking self-turn-off devices 37, 47, 57 is connected between a connection point of the second diode and the second thyristor and the AC terminal, so that the AC terminal direction is a reverse direction. |
