| 摘要 |
The present invention relates to a DC breaker that can break a fault current generated in a direct current line, using a unidirectional semiconductor switch device. The DC breaker comprises: a mechanical switch that is connected between a first direct current line and a second direct current line; a first unidirectional semiconductor switch device that is connected with the second direct current line in parallel with the mechanical switch, and transfers a current to the first direct current line into which a steady state current flows through the second direct current line when a fault current is generated, so that a current of the first direct current line becomes zero; an LC resonant circuit that is connected between the first unidirectional semiconductor switch device and an earth in series, is charged by receiving a steady state current of the first direct current line, and generates a resonant current to the first unidirectional semiconductor switch device when the fault current is generated; and a second unidirectional semiconductor switch device that is connected in parallel with each of the first unidirectional semiconductor switch device and the LC resonant circuit, and enables a capacitor of the LC resonant circuit to be charged with a steady state current of the first direct current line. |
