Design and performance analysis of a 1500 A, 400 mH superconducting DC reactor coil using 2G multi-ply HTS wire

Abstract

This paper deals with the design and performance analysis of a superconducting DC reactor using multi-ply high temperature superconducting (HTS) wire for a high-current DC reactor. To design the high-current DC reactor, 2G multi-ply HTS wire (SuNAM Co., Ltd.) was used to achieve a high ampacity. The critical current was measured according to the bending diameter in order to confirm the bending characteristics of the 2-ply and 3-ply wires. The HTS coils for a 1500 A, 400 mH HTS DC reactor were designed based on the characteristics of multi-ply HTS wire. Electromagnetic analysis of the toroid-type DC reactor was performed with the finite element method. HTS coils were wound with a D-shaped double pancake type bobbin. The critical current of the double pancake coil (DPC) modules was measured in a liquid nitrogen vessel. The performance test results were compared with the analysis results. Based on the critical current of DPC measured at 77 K, it was confirmed that 1500 A could be flowed at the operating temperature of 20 K. These results will be effectively utilized for the design and fabrication of an HTS DC reactor that can be used in real power systems.