CPC H02H 3/025 (2013.01) [H02H 1/0015 (2013.01); H02H 3/087 (2013.01)] | 5 Claims |
1. A multi-circuit DC breaking system in a DC breaking system of a DC power grid, the multi-circuit DC breaking system comprising:
a superconducting current-limiting module configured to detect a failure of the DC power grid through a phase transition and limit a maximum magnitude of a fault current;
a hybrid controller configured to detect the fault current of the DC power grid according to a fault detection of the superconducting current-limiting module and transmit a circuit control signal according to the detected magnitude of the fault current; and
a multi-circuit breaking module provided with a plurality of auxiliary circuits having different capacity in parallel connection, configured to break a main circuit of the DC power grid according to the circuit control signal received from the hybrid controller, and configured to extinguish an arc by connecting a part of the auxiliary circuits to the DC power grid.
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