The Modeling of the LC Divergence Oscillation Circuit of a Superconducting DC Circuit Breaker Using PSCAD/EMTDC

Sang-Yong Park, Geon-Woong Kim, Ji-Sol Jeong and Hyo-Sang Choi
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Sang-Yong Park: Department of Electrical Engineering, Chosun University, Gwangju 61452, Korea
Geon-Woong Kim: Department of Electrical Engineering, Chosun University, Gwangju 61452, Korea
Ji-Sol Jeong: Department of Electrical Engineering, Chosun University, Gwangju 61452, Korea
Hyo-Sang Choi: Department of Electrical Engineering, Chosun University, Gwangju 61452, Korea

Energies, 2022, vol. 15, issue 3, 1-14

Abstract: We proposed a superconducting DC circuit breaker that can reliably cut off the fault currents in preparation for the DC system. It consists of a superconducting element and a mechanical DC circuit breaker. The mechanical DC circuit breaker is connected in parallel with a mechanical high-speed switch, an LC divergence oscillation circuit, and a surge arrester. This provides stable cutoff operation due to the fault-current-limiting operation of the superconducting element and the artificial current zero point of the mechanical DC circuit breaker. In this paper, the operating principle of the LC divergence oscillation circuit that creates an artificial current zero point was reviewed based on the theory. We used experimental data to model the time constant of the initial fault current, the arc model generated by the mechanical high-speed switch, and the experimental equipment. As a result, the LC divergence oscillation circuit was confirmed in the simulation, and simulation modeling was reviewed based on the theoretical principle of generation.

Keywords: DC circuit breaker; LC divergence oscillation circuit; superconducting element; PSCAD/EMTDC program (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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