Experimental tests of DC SFCL under low impedance and high impedance fault conditions

Xi, J., Pei, X., Song, W. , Xiang, B., Liu, Z. and Zeng, X. (2021) Experimental tests of DC SFCL under low impedance and high impedance fault conditions. IEEE Transactions on Applied Superconductivity, 31(5), 5601205. (doi: 10.1109/TASC.2021.3065886)

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DC system protection is more challenging than that for AC system due to the rapid rate of rise of the fault current and absence of natural current zero-crossing in DC systems. Superconducting fault current limiter (SFCL) in DC systems is a promising technology to reduce the fault current level and the rate of rise of the fault current, and also SFCLs have no resistance during normal operation. In this paper, the behaviors of an SFCL coil are investigated under both low impedance and high impedance fault conditions in DC systems. In the low impedance fault condition system, the SFCL coil performs effective limitation of the fault current level under different prospective fault current levels. The application of SFCLs with limited inductance in the DC system can be a potential solution to effectively suppress the fault current under low impedance short-circuit faults. The SFCL coil under the high impedance fault condition can only limit the prospective fault current when it is much higher than the critical current of the coil.

Item Type:Articles
Additional Information:This work was supported in part by the U.K. EPSRC: Developing superconducting fault current limiters (SFCLs) for distributed electric propulsion aircraft: EP/S000720/1, and in part by the U.K. Royal Society International Exchanges 2018 Cost Share (China): Advanced DC fault protection by integration of superconducting fault current limiter (SFCL) with DC circuit breaker: IEC\NSFC\181111.
Keywords:Fault current limiters, power system protection, short-circuit currents, YBCO.
Glasgow Author(s) Enlighten ID:Song, Dr Wenjuan
Authors: Xi, J., Pei, X., Song, W., Xiang, B., Liu, Z., and Zeng, X.
College/School:College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
Journal Name:IEEE Transactions on Applied Superconductivity
ISSN (Online):1558-2515
Published Online:12 March 2021
Copyright Holders:Copyright © 2021 IEEE
First Published:First published in IEEE Transactions on Applied Superconductivity 31(5): 5601205
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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