Experimental Investigation of a Model of a Transformer-Type Superconducting Fault Current Limiter With a Superconducting Coil Made of a 2G HTS Tape

A superconducting fault current limiter (SFCL) reduces the short-circuit current level in a power system and thus provides protection for and significantly reduces the wear and tear of circuit breakers and other substation power equipment. This paper describes a design and test results of a model of a transformer-type superconducting fault current limiter (TrSFCL) with a 1-phase 10 kV copper transformer and a secondary winding shorted by a superconducting current limiting coil made of 2G HTS tape. Special regard is given to the ability of this device to limit a short-circuit current thanks to the parameters of both the HTS coil and the 2G HTS tape used, and in particular to its resistivity in the resistive state at a temperature of 77 K.