Abstract: There has been remarkable progress in the technology for producing coated conductors recently. Long YBCO tapes would be widely devoted to various practical applications such as power cables, fault-current limiters and SMES. In the paper, an optimal design of a Micro-SMES magnet is proposed to minimize the amount of conductor material usage. This is obtained by considering anisotropic B-I characteristic of YBCO coated conductor while maintaining the energy storage capacity. The losses of the coils and current leaders were analyzed for the basic evaluation to the design of the sub-cooled liquid nitrogen (LN₂) cryogenic system. A voltage-source-convertor (VSC) is empolyed to achieve the transimmison of energy and power between the SMES and the power system. The simulation of SMES was performed to investigate its roles in power system. Finally, the feasibility of its practical applications was discussed.

Key words: superconducting magnetic energy storage, YBCO coated conductor, systematic design, application analysis