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http://dx.doi.org/10.4313/JKEM.2013.26.2.134

Current Limiting Characteristics of a SFCL with Two Triggered Current Limiting Levels in a Simulated Power Distribution System  

Ko, Seok-Cheol (Industry-University Cooperation Foundation, Kongju National University)
Han, Tae-Hee (Department of Energy Resources Engineering, Jungwon University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.26, no.2, 2013 , pp. 134-139 More about this Journal
Abstract
When the accident occurred in power distribution system, it needs to control efficiently the fault current according to the fault angle and location. The flux-lock type superconducting fault current limiters (SFCL) can quickly limit when the short circuit accidents occurred and be made the resistance after the fault current. The flux-lock type SFCL has a single triggering element, detects and limits the fault current at the same time regardless of the size of the fault current. However, it has a disadvantage that broken the superconductor element. If the flux-lock type SFCL has separated structure of the triggering element and the limiting element, when large fault current occurs, it can reduce the burden of power and control fault current to adjust impedance. In this paper, this system is composed by triggering element and limiting element to analyze operation of limiting current. When the fault current occurs, we analyzed the limiting and operating current characteristics of the two triggering current level, and the compensation characteristics of bus-voltage sag according to the fault angle and location.
Keywords
Superconducting fault current limiter (SFCL); Current limiting function; Fault angle; Fault location; Fault current limiting operation;
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