GEOMETRY OPTIMIZATION OF SMES COIL
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2011, Vol 35, Issue 35
Abstract
Superconducting Magnetic Energy Storage (SMES) device is an attractive solution for energy storage. Because the most important element of SMES system is toroidal superconducting coil, the cryogenic technology involved in the development of SMES is the main disadvantage. More, using the low temperature superconductor materials (LTS), which operate at liquid helium temperatures (4.2 K) is an additional disadvantage in terms of construction and functioning. The maximum stored energy is determined by the size and the geometry of the coil, which determines its inductance, and the characteristics of the superconductor used, which determine the maximum current. The Volume or the quantity of superconducting material has a major contribution to the investment cost of such storage systems as the price of the superconducting material and the refrigeration capacity of helium liquefactor. The purpose of this paper is to establish geometric criteria for pre-sizing of toroidal coil for magnetic energy storage in order to minimize the volume of the superconducting material used. It uses an iterative method for determining relationships between the characteristic dimensions of the toroidal coil. Basically, two parameters are determined. These parameters are ratios of geometrical dimensions and define correlations between three characteristic geometrical dimensions. These correlations are then adjusted for reasons of electromagnetic field for not to exceed certain critical parameters of the superconducting state.
Authors and Affiliations
Florian ŞTEFĂNESCU
Keywords
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