Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title A Decision Method for the Optimal Insertion Resistance of a Superconducting Fault Current Limiter with Reduction of an Asymmetric Fault Current
Authors 김창환(Kim, Chang-Hwan) ; 김규호(Kim, Kyu-Ho) ; 이상봉(Rhee, Sang-Bong)
DOI https://doi.org/10.5370/KIEE.2015.64.1.057
Page pp.57-63
ISSN 1975-8359
Keywords Asymmetric fault current ; DC offset ; Fault inception angle ; SFCL ; EMTP
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).