Multi-circuit DC breaking system
AssigneeGreen Energy Institute
InventorsHyenjun Choi, Jihoon Park, Hyewon Choi, Insung Jeong
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Abstract
A multi-circuit DC breaking system is proposed. According to an exemplary embodiment of the present technique, there may be an advantage that by combining current-limiting technology and multi-circuit breaking technology, a failure may be quickly detected, a magnitude of a fault current may be firstly limited, and a breaking operation is performed, in a range of various fault currents, by distributing the fault currents to some circuits of multi-circuits configured in parallel, thereby easily increasing the capacity thereof.
Claims5
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.
Dependencies are inferred from the claim text.