Study on Commercialization of High-Temperature Superconductor

摘要

By using the Controlled Over Pressure (CT-OP) process, Sumitomo Electric Industries, Ltd. (SEI) has developed a world's-longest, commercial-level Bi_2Sr_2Ca_2Cu_3O (BSCCO) high-temperature superconducting (HTS) wire and named it "Dynamically Innovative BSCCO (DI-BSCCO)". Because the DI-BSCCO wire has the high critical current, high strength, high production yield and anti-ballooning properties and it is far superior to conventional BSCCO wires, SEI is pursuing the use of the DI-BSCCO wire for HTS applications. This paper summarizes the result of the study on HTS cable system. The authors studied the reliability from the perspectives of lifespan and failure, economic efficiency from transmission loss reduction and energy saving performance, and environmental performance from EMI and LCA evaluation, and concluded that HTS cables have reached the stage of actual utilization. It is expected that after HTS cables are evaluated on actual grids in the near future, practical utilization will be accelerated. SEI is aimed to penetrate the global HTS market with its DI-BSCCO wire by further improving the performances and promoting the practical application of the wire.