Line energy-taking direct-current circuit breaker and application method thereof

The invention provides a line energy-taking direct-current circuit breaker and an application method thereof, the line energy-taking direct-current circuit breaker comprises a through-flow branch, an on-off branch and an energy consumption branch, the through-flow branch is connected in a direct-current system in series, the on-off branch is connected with the through-flow branch in parallel, and the energy consumption branch is connected to two ends of an internal capacitor of the on-off branch in parallel; the through-current branch comprises a first mechanical switch group and a second mechanical switch group, and the first mechanical switch group and the second mechanical switch group are connected in series; the on-off branch comprises a charging loop, a first current injection loop, a second current injection loop and an oscillation loop. By implementing the circuit breaker, the reclosing function and the bidirectional turn-off function of the circuit breaker are realized, and the flexibility and the re