DESIGN AND CURRENT-LIMITING SIMULATION OF MAGNETIC-SHIELD TYPE SUPERCONDUCTING FAULT CURRENT LIMITER WITH HIGH-TC SUPERCONDUCTORS

The continuous development of electric power utilities has led to the increase in the problems concerning fault currents, The use of fault c urrent limiters, which suppress fault currents below a prescribed leve l, has been examined in many places. The authors have studied a superc onducting fault current limiter that is based on the magnetic shieldin g effect of superconductors, In this paper, we derive a requirement fo r leading to a flux-jumping inside a ceramic superconductor at liquid nitrogen temperature. Next, two kinds of magnetic-shield type supercon ducting fault current limiters are designed, and their current-limitin g simulations are tried using a computer.