Long-Term Operation and Fault Tests of a 22.9 kV Hybrid SFCL in the KEPCO Test Grid

Author

Hyun, Ok-Bae ; Yim, Seong-Woo ; Yu, Seung-Duck ; Yang, Seong Eun ; Kim, Woo-Seok ; Kim, Hye-Rim ; Lee, Gyeong-Ho ; Sim, Jungwook ; Park, Kwon-Bae

Author_Institution

T&D Lab., KEPCO Res. Inst. (KEPRI), Daejeon, South Korea

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

2131

Lastpage

2134

Abstract

This paper reports on the operation test of a 22.9 kV hybrid superconducting fault current limiter (SFCL) in the KEPCO test grid. The SFCL works at a rated voltage and current of 22.9 kV and 630 A, respectively. There are two major objectives of the operation test: (1) long-term operation and (2) fault tests for protection coordination study. The operation lasted for more than a year. We experienced several times of cryostat suspension due to blackouts and false alarms due to sensor failures during the operation. We also carried out short circuit tests in the test grid, equipped with circuit breakers and a recloser. An artificial fault generator was used to generate fault currents. The tests showed that the SFCL, together with the recloser, functioned reliably under repeated faults. We also confirmed the reclosing capability of the SFCL. We have presented herein the operation details, cost of operation, short-circuit test results, and our plans for further tests for protection coordination.

Keywords

circuit breakers; cryostats; short-circuit currents; superconducting fault current limiters; KEPCO test grid; circuit breaker; cryostat suspension; current 630 A; hybrid SFCL; hybrid superconducting fault current limiter; short circuit test; voltage 22.9 kV; Circuit breakers; Circuit faults; Fault current limiters; Fault currents; High temperature superconductors; Impedance; Superconducting transmission lines; Operation test; protection coordination; reclosing; superconducting fault current limiter;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2089587

Filename

5643135