APPARATUS FOR LIMITING CURRENT OF CIRCUIT OR BREAKING CURRENT, AND CONTROL METHOD THEREOF

摘要

An apparatus for limiting a current of a circuit or breaking a current, and a control method thereof. The apparatus comprises current breaking branches (29) and bridge branches. The bridge branches comprise two bridge arms formed by four identical current commutation branches. Every two branches of the four current commutation branches are connected in series in the same direction, and the formed two bridge arms are then connected in parallel. The two bridge arms are both connected in parallel to the current breaking branch, and middle points of the two bridge arms are separately connected to two points of a circuit. Each current commutation branch comprises at least one high-speed disconnecting switch (6) and at least one bidirectional power semiconductor switch (10) both connected in series to each other. The apparatus can turn off a bidirectional current.