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Study on the 2G High Temperature Superconducting Coil for Large Scale Superconducting Magnetic Energy Storage Systems
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 Title & Authors
Study on the 2G High Temperature Superconducting Coil for Large Scale Superconducting Magnetic Energy Storage Systems
Lee, Ji-Young; Lee, Seyeon; Kim, Yungil; Park, Sang Ho; Choi, Kyeongdal; Lee, Ji-Kwang; Kim, Woo-Seok;
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 Abstract
Large scale superconducting magnetic energy storage (SMES) system requires very high magnetic energy density in its superconducting coils to enhance the energy capacity and efficiency of the system. The recent high temperature superconducting (HTS) conductors, so called 2G conductors, show very good performance under very high magnetic field so that they seem to be perfect materials for the large scale SMES coils. A general shape of the coil system with the 2G HTS conductor has been a tor oid, because the magnetic field applied perpendicularly to the surface of the 2G HTS conductor could be minimized in this shape of coil. However, a toroid coil requires a 3-dimensional computation to acquire the characteristics of its critical current density - magnetic field relations which needs very complicated numerical calculation, very high computer specification, and long calculation time. In this paper, we suggested an analytic and statistical calculation method to acquire the maximum magnetic flux density applied perpendicularly to the surface of the 2G HTS conductor and the stored energy in the toroid coil system. Although the result with this method includes some errors but we could reduce these errors within 5 percent to get a reasonable estimation of the important parameters for design process of the HTS toroid coil system. As a result, the calculation time by the suggested method could be reduced to 0.1 percent of that by the 3-dimensional numerical calculation.
 Keywords
SMES;Toroid;Magnetic Field;Stored energy;
 Language
Korean
 Cited by
 References
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