Title :
A magnetic shielding type superconducting fault current limiter using a Bi2212 thick film cylinder
Author :
Ichikawa, M. ; Okazaki, M.
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Kanagawa, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
The application of a superconductor to a fault current limiter in a power system has been researched. The authors developed a magnetic shielding type superconducting fault current limiter using a Bi2212 thick film cylinder. This limiter consists of a primary winding on a superconducting cylinder for generating an AC magnetic field, the cylinder for shielding the field, an iron core for magnetic members and a control ring for controlling fault currents. When a fault occurs, the superconductive cylinder quenches and a magnetic circuit is formed inside the cylinder. As a result, the limiter has a high impedance to limit the fault current. The present study shows the limiting and recovery characteristics of the fault current limiter.<>
Keywords :
current limiters; magnetic circuits; magnetic cores; magnetic shielding; overcurrent protection; power system protection; superconducting coils; switchgear testing; windings; AC magnetic field; Bi; Bi2212 thick film cylinder; control ring; impedance; iron core; limiting characteristics; magnetic circuit; magnetic shielding; power system; primary winding; quenches; recovery characteristics; superconducting cylinder; superconducting fault current limiter; AC generators; Fault current limiters; Fault currents; Iron; Magnetic cores; Magnetic shielding; Power system faults; Superconducting films; Superconducting magnets; Thick films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
