Title :
Switching properties of a hybrid type superconducting fault current limiter using YBCO stripes
Author :
Choi, Hyo-Sang ; Hyun, Ok-Bae ; Kim, Hye-Rim ; Park, Kwon-Bae
Author_Institution :
Korea Electr. Power Res. Inst., Taejon, South Korea
fDate :
9/1/2002 12:00:00 AM
Abstract :
Presents investigations of a hybrid type superconducting fault current limiter (SFCL), which consists of transformers and resistive superconducting switches. The secondary windings of the transformer were separated into several electrically isolated circuits and linked inductively with each other by mutual flux, each of which has a superconducting current limiting unit of YBa2Cu3O 7 (YBCO) stripes as a switch. Simple connection in series of the SFCL switches tends to produce ill-timed switching because of power dissipation imbalance between SFCL units. Both electrical isolation and mutual flux linkage of the switches provides a solution to power dissipation imbalance, inducing simultaneous switching by independent quenches and current redistribution of the YBCO films. This design enables increase of voltage ratings of SFCL with given YBCO stripes
Keywords :
barium compounds; fault current limiters; superconducting switches; superconducting thin films; superconducting transformers; yttrium compounds; YBa2Cu3O7; current redistribution; electrically isolated circuits; hybrid type superconducting fault current limiter; independent quenches; mutual flux linkage; power dissipation imbalance; resistive superconducting switches; secondary windings; transformers; Couplings; Current limiters; Fault current limiters; Fault currents; Power dissipation; Switches; Switching circuits; Transformers; Voltage; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.801816