In a medium-voltage power system, fault currents are subjected to uncertainties in lines and distributed generations. Uncertainties in fault currents in a power grid can introduce system protection problems. Superconducting cable with fault current limiting capability can be used as means to meet the increasing electricity demand while resolving the issues involving system protection. In order to integrate the fault current limiting superconducting cable into a power grid, its impedance selection under fault conditions needs to consider the impact of power system uncertainties on system protection. In this paper, an expected regret-based method is proposed for determining the impedance of the fault current limiting superconducting cable incorporating the uncertainties in fault currents. The results of numerical simulations are presented to show the effectiveness of the proposed expected regret-based impedance selection method.
Bibliographical noteFunding Information:
This work was supported in part by the "Human Resources program in Energy Technology" of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry, and Energy, Republic of Korea (No. 20154030200610), and in part by the MSIP Ministry of Science, ICT, and Future Planning), Korea, under the ITRC (Information Technology Research Center) support program (IITP-2016- H8501-16-1017) supervised by the IITP (Institute for Information & Communications and Technology Promotion).
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- Fault current
- power system protection
- power system uncertainty
- superconducting cable
- system studies for superconducting devices
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering