Performance of DC reactor type fault current limiter using high temperature superconducting coil

The purpose of this work is to study a DC reactor type fault current limiter (FCL) using high temperature superconducting (HTS) coil which is connected with the secondary winding of a transformer through a diode bridge. The high temperature superconductors provide the advantages of a higher temperature operation and they are preferably applied to the DC reactor type fault current limiters, where a superconducting coil can be operated at both low voltage and DC current. The authors propose a DC reactor type three-phase FCL incorporating only one HTS coil and present its test result. A three-phase FCL for 6.6 kV-2000 A requires one HTS coil of 2.9 MJ.