Patent ID: 9362734
Filing Date: 2016-06-07
CPC Classification: H01H,H02H

Claim Text:
1. An apparatus for limiting a current of a line or breaking a current, comprising: a current breaking branch, wherein the current breaking branch comprises one breaking unit or at least two breaking units that are connected in series, each breaking unit comprises one solid-state direct current (DC) circuit breaker and one non-linear resistance connected in parallel, a bridge branch, wherein the bridge branch comprises two bridge arms formed by four identical current commutation branches, every two of the four current commutation branches are connected in series, 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 ends of a line; each current commutation branch comprises at least one high-speed isolation switch and at least one bidirectional power semiconductor switch that are connected in series; and a direction in which a current enters from the middle point of a first bridge arm and sequentially flows through a first current commutation branch in the first bridge arm, the current breaking branch, and a fourth current commutation branch in a second bridge arm is defined as a first current direction, a direction in which a current enters from the middle point of the second bridge arm and sequentially flows through a third current commutation branch in the second bridge arm, the current breaking branch, and a second current commutation branch in the first bridge arm is defined as a second current direction, and an arrangement direction of the solid-state DC circuit breaker is the same as the first and second current directions.