Operational Characteristics of Hybrid-Type SFCL by the Number of Secondary Windings With YBCO Films

Author

Choi, Hyo-Sang ; Cho, Yong-Sun ; Lim, Sung-Hun

Author_Institution

Dept. of Electr. Eng., Chosun Univ.

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

719

Lastpage

722

Abstract

We investigated the operational characteristics of the hybrid-type superconducting fault current limiter (SFCL) according to the number of secondary windings. The SFCL consists of a transformer, which has a primary winding and several secondary windings with serially connected YBa₂Cu₃O₇ films. In order to increase the capacity of the SFCL, the serial connection between each current limiting unit is necessary. Resistive-type SFCL has a difficulty in quenching simultaneously between the units due to slight differences of their critical current densities. The hybrid-type SFCL could achieve the simultaneous quenching through the electrical isolation and the mutual flux linkage among the units. We confirmed that the capacity of the SFCL could be increased effectively through the simultaneous quenching among the units. In addition, the power burden of the system could be reduced by adjusting the number of secondary windings. We will investigate the method to increase the capacity through serial and parallel connections among current limiting units

Keywords

barium compounds; critical current density (superconductivity); fault current limiters; high-temperature superconductors; superconducting devices; superconducting thin films; transformer windings; yttrium compounds; YBCO film; YBa₂Cu₃O₇; critical current density; hybrid SFCL; mutual flux linkage; quenching; superconducting fault current limiter; transformer secondary winding; Critical current density; Current limiters; Fault current limiters; Fault currents; Inductance; Power system faults; Power system protection; Superconducting coils; Superconducting films; Yttrium barium copper oxide; Hybrid-type superconducting fault current limiter; number of secondary windings; power burden; simultaneous quenching;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2006.871270

Filename

1642949