A MAGNETIC SHIELDING TYPE SUPERCONDUCTING FAULT CURRENT LIMITER USINGA BI2212 THICK-FILM CYLINDER

The application of a superconductor to a fault current limiter in a po wer system has been researched, We developed a magnetic shielding type superconducting fault current limiter using a Bi2212 thick film cylin der, This limiter consists of a primary winding on a superconducting c ylinder for generating an AC magnetic field, the cylinder for shieldin g the field, an iron core for magnetic members and a control ring for controlling fault currents, When a fault occurs, the superconductive c ylinder quenches and a magnetic circuit is formed inside the cylinder, As a result, the limiter has a high impedance to limit the fault curr ent, The present study shows the limiting and recovery characteristics of the fault current limiter.