| 摘要 |
The present invention relates to a high voltage DC circuit breaker capable of breaking a fault current which flows onto a high voltage DC line by connecting a vacuum blocking unit (110) and a gas blocking unit in serial. The DC circuit breaker comprises: the vacuum blocking unit for blocking a current on the DC line, installed on the DC line, operating when an error occurs on one side of the DC line; the gas blocking unit connected to the vacuum blocking unit in serial; an LC circuit, including a capacitor and a reactor connected to each other in serial to generate LC resonance, connected to the vacuum blocking unit (110) in parallel; a first bi-directional switching element connected to the LC circuit in serial and for switching bi-directional flowing of currents; and a second bi-directional switching element connected to the LC circuit in parallel and for switching the flowing of currents to realize bi-directional LC resonance. |
