Title :
Installation and Testing of SFCLs
Author :
Hye-Rim Kim ; Seong-Eun Yang ; Seung-Duck Yu ; Heesun Kim ; Woo-Seok Kim ; Kijun Park ; Ok-Bae Hyun ; Byeong-Mo Yang ; Jungwook Sim ; Young-geun Kim
Author_Institution :
KEPCO Res. Inst., Daejeon, South Korea
fDate :
6/1/2012 12:00:00 AM
Abstract :
A 22.9 kV/630 A-class superconducting fault current limiter (SFCL) was installed on a distribution line in Icheon Substation for real-grid operation. The substation is located in a semi-urban area with moderate loads. The SFCL is of hybrid type. After installation it was subjected to a series of on-site tests. Test procedures were determined by following convention in testing both superconductivity-related and not-related specifications of the SFCL. Tests performed were minimum limiting current test, temperature test, dielectric test, and impedance measurement. After successfully passing the tests, the cooling system of the SFCL was operated for more than 5 months under various load conditions to optimize the operation condition. During that period, temperatures, liquid nitrogen level, and internal pressure remained within ±0.1 K, ±0.5 cm, and ±0.5 bar range, proving stability in cooling superconducting elements. The SFCL was then energized and went into real-load operation successfully.
Keywords :
electrical installation; fault currents; power distribution lines; substation protection; superconducting fault current limiters; Icheon Substation; SFCL; distribution line; installation; real-grid operation; superconducting fault current limiter; testing; Circuit breakers; Cooling; Fault currents; Limiting; Nitrogen; Substations; Superconducting transmission lines; Distribution class; operation; real grid; superconducting fault current limiter; test;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2011.2181812