Title :
Evaluation of Step-Shaped Solenoidal Coils for Current-Enhanced SMES Applications
Author :
Chen, Xiao Yuan ; Jin, Jian Xun
Author_Institution :
Center of Appl. Supercond. & Electr. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper investigates a step-shaped solenoidal coil for current-enhanced superconducting magnetic energy storage (SMES) applications. Three performance evaluation factors related to the coil inductance, critical current and energy storage capacity are extracted to analyze and evaluate the energy storage characteristics of the step-shaped solenoidal coil. As compared to a conventional solenoidal coil with rectangular cross-sectional shape, the step-shaped one could obtain the same energy storage capacity with reduced tape usage amount; it also improves the critical current significantly. To suit various high-current application conditions such as low-voltage direct-current power transmission, four feasible application schemes of sole step-shaped coil, semi-step-shaped coil, sub-step-shaped coil, and sub-semi-step-shaped coil are explored and discussed.
Keywords :
DC power transmission; critical currents; inductance; superconducting coils; superconducting magnet energy storage; superconducting magnets; coil inductance; critical current; current-enhanced superconducting magnetic energy storage applications; energy storage capacity; low-voltage direct-current power transmission; performance evaluation; semistep-shaped coil; sole step-shaped coil; step-shaped solenoidal coil; subsemistep-shaped coil; substep-shaped coil; Coils; Critical current density (superconductivity); Energy storage; High-temperature superconductors; Integrated circuits; Magnetic fields; Shape; Bi-2223 solenoidal coil; HTS coil structure optimization; HTS critical current; step-shaped coil; superconducting magnetic energy storage (SMES);
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2014.2356572
