APPARATUS FOR BREAKING CURRENT OF CIRCUIT AND CONTROL METHOD THEREOF

摘要

An apparatus (20) for breaking a current of a circuit (44) and a control method thereof. The apparatus (20) for breaking a current of a circuit (44) comprises a unidirectional direct current breaker (10) and a bridge branch circuit. The bridge branch circuit comprises two bridge arms formed by four identical commutating branch circuits (A, B, C, D), two groups comprising two commutating branch circuits each in the four commutating branch circuits are connected in series in the same direction, two formed bridge arms are connected in parallel, and each commutating branch circuit comprises a same-direction serial connection of at least one first power semiconductor device (7). Two bridge arms of the bridge branch circuit are both connected in parallel to the unidirectional direct current breaker (10), and two ends of the circuit (44) are separately connected to bridge arm middle points (3,4) of the two bridge arms. On the premise of enough high breaking speed and low loss, the apparatus (20) for breaking a current of a circuit (44) can greatly reduce the cost of the apparatus, and reduce the layout, mounting and wiring difficult of the apparatus and the device.