Abstract
This paper introduces the development progress regarding the current lead for SMES. Large-current carrier capacity has been attained by connecting two or more 1kA-class YBCO superconductivity current lead elements in parallel. Miniaturization of the SMES current lead for bridging instantaneous voltage dips has been achieved by cooling the YBCO bulk elements with a small direct cryocooler, and a 10kA-class current lead has been produced by connecting 1kA-class current leads in parallel. This current lead, which supplies electric power to the SMES model coil for load fluctuation compensation and frequency control, was further developed as a national project of the Agency of Natural Resources and Energy.
