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http://dx.doi.org/10.5370/KIEE.2015.64.1.057

A Decision Method for the Optimal Insertion Resistance of a Superconducting Fault Current Limiter with Reduction of an Asymmetric Fault Current  

Kim, Chang-Hwan (Dept. of Electrical Engineering, Yeungnam Univerity)
Kim, Kyu-Ho (Dept. of Electrical Engineering, Hankyong Univerity)
Rhee, Sang-Bong (Dept. of Electrical Engineering, Yeungnam Univerity)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.64, no.1, 2015 , pp. 57-63 More about this Journal
Abstract
Fault currents characteristics contain decaying DC offset. First cycle peak value of fault currents is higher than steady-state fault current value. These characteristics can affect the operation of protective device. To reduce the asymmetric fault current, the method using a series connection of two hybrid-type Superconducting Fault Current Limiter(SFCL) components, an auxiliary SFCL and a main SFCL, has been proposed. The auxiliary SFCL limits the first half cycle fault current, while main SFCL limits the steady state fault currents. This paper proposed a decision method of the optimal insertion resistance of auxiliary and main SFCL components. To verify the effectiveness of proposed scheme, the various simulations are performed by using Electromagnetic Transient Program(EMTP).
Keywords
Asymmetric fault current; DC offset; Fault inception angle; SFCL; EMTP;
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