抄録
The present paper proposes a new type fault current limiter (FCL), which consists of a high Tc superconducting (HTS) element and two coils wound on the same core without any leakage magnetic flux. In this FCL, either the limiting impedance or the initial limiting current level can be controlled by adjusting the inductances and the winding direction of the coils. Therefore, this FCL could relax the material restrictions on high Tc superconducting FCL. A current-limiting experiment by a model FCL was carried out, and the limiting performance was observed. The initial limiting current level of the model FCL was 1.7 times as high as the critical current of the HTS element, and the fault current is suppressed down to 52% immediately after the short-circuit in the test. Considering a voltage-current characteristics of a high Tc superconductor in a computer simulation, the calculated results almost agreed with the experimental results.
