DC CIRCUIT BREAKER DEVICE

摘要

In a DC circuit breaker device, first and second semiconductor switches are connected in series on a main circuit line such that current-carrying directions of the switches are opposite to each other. A first diode is connected in anti-parallel with the first semiconductor switch, and a second diode is connected in anti-parallel with the second semiconductor switch. First and second mechanical circuit breakers are connected in series with each other and in parallel with the whole of the first and semiconductor switches. First and second backward current generation circuits are connected in series with each other and in parallel with the whole of the first and second mechanical circuit breakers. An injection switch is connected between a node between the first and second mechanical circuit breakers and a node between the first and second backward current generation circuits.

主权项

1. A DC circuit breaker device comprising:
a first semiconductor switch and a second semiconductor switch connected in series between a first node on a main circuit line and a second node on the main circuit line such that current-carrying directions of the switches are opposite to each other; a first diode connected in parallel with the first semiconductor switch to carry a current in a direction opposite to the current-carrying direction of the first semiconductor switch; a second diode connected in parallel with the second semiconductor switch to carry a current in a direction opposite to the current-carrying direction of the second semiconductor switch; a first mechanical circuit breaker and a second mechanical circuit breaker successively connected in series between the first node and the second node, and connected in parallel with the whole of the first semiconductor switch and the second semiconductor switch; a first backward current generation circuit and a second backward current generation circuit successively connected in series between the first node and the second node, and connected in parallel with the whole of the first semiconductor switch and the second semiconductor switch and in parallel with the whole of the first mechanical circuit breaker and the second mechanical circuit breaker, to pass a backward current through the first mechanical circuit breaker and the second mechanical circuit breaker, respectively; an injection switch connected between a third node between the first mechanical circuit breaker and the second mechanical circuit breaker and a fourth node between the first backward current generation circuit and the second backward current generation circuit; and a controller to control timing of opening/closing the first semiconductor switch, the second semiconductor switch, the first mechanical circuit breaker, the second mechanical circuit breaker, and the injection switch.