Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/KIEE.2016.65.5.878
Title & Authors
Operational Characteristics of the FCL Using the Mechanical Contact in the Power System Jung, Byung-Ik; Choi, Hyo-Sang;
These days, SFCLs are being developed in order to limit fault current. However, the superconducting elements that limit the fault current have such problems as capacity increase and require auxiliary devices including cooling device. If devices that comprise the current power network can withstand fault current for at least one cycle, it is possible to limit the fault current with current limiting elements by bypassing it on the fault line. In this study, the fault current limiter was configured with current transformer, vacuum interrupter, and current limiting element. Through the experience, it was confirmed that the fault current was limited within one cycle. The superconducting element, as a current limiting element, limited the fault current by 80 % within one cycle from fault occurrence, and the passive element limited it more than 95 %. Also, through the comparison between resistance curve and power consumption curve, it was confirmed that the current limiting element using a passive element was more stable than the superconducting element that required capacity increase and other auxiliary devices. It was considered that the FCL proposed in this study could limit fault current stably within one cycle from fault occurrence by using the existing power technologies such as fault current detection and solenoid valve operating circuit.
Superconducting fault current limiter (SFCL);Passive element;Solenoid valve;Vacuum interrupter;Fault current dection;
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