US 11,855,438 B2
Multi-circuit DC breaking system
Hyenjun Choi, Jeollanam-Do (KR); Jihoon Park, Busan (KR); Hyewon Choi, Gwangju (KR); and Insung Jeong, Gwangju (KR)
Assigned to GREEN ENERGY INSTITUTE, Jeollanam-do (KR)
Filed by GREEN ENERGY INSTITUTE, Jeollanam-do (KR)
Filed on Aug. 5, 2021, as Appl. No. 17/395,063.
Application 17/395,063 is a continuation of application No. PCT/KR2020/012100, filed on Sep. 8, 2020.
Claims priority of application No. 10-2020-0061541 (KR), filed on May 22, 2020.
Prior Publication US 2021/0376590 A1, Dec. 2, 2021
Int. Cl. H02H 3/02 (2006.01); H02H 3/087 (2006.01); H02H 1/00 (2006.01)
CPC H02H 3/025 (2013.01) [H02H 1/0015 (2013.01); H02H 3/087 (2013.01)] 5 Claims
OG exemplary drawing
 
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.