Comparative study on current limiting characteristics of flux-lock type SFCL with series or parallel connection of two coils

Improvement of Current Limiting and Recovery Characteristics of Flux-Lock Type SFCL with Series Connection of Two Coils Using Its Third Coil

“…There have been efforts to develop a fault current limiting device that can limit steadily increasing shortcircuit current, including researches on a high-temperature superconducting fault current limiter (SFCL), which may provide more effective control and limiting of fault current [4][5][6]. It has been reported that among SFCLs that use magnetic coupling operated by a single high-temperature superconducting (HTSC) element using a single iron core as a medium, flux-lock SFCLs (in which two coils are connected in parallel or in series) have adjustable current limiting capability, and the resistance of the HTSC element can also be adjusted higher or lower as well than that the resistive type SFCL [7][8][9]. Recently, a flux-lock SFCL model with the peak current limiting function using two separated SC modules has been introduced and its effective current limiting characteristics have been described [10][11][12].…”