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Publication Type : Journal Article
Publisher : IEEE
Source : IEEE Transactions on Transportation Electrification
Url : https://ieeexplore.ieee.org/document/10551874
Campus : Coimbatore
School : School of Engineering
Year : 2024
Abstract : The discrepancy between the observed enhancement of the intrinsic dielectric strength of helium gas by mixing hydrogen and the performance of High Temperature Superconducting (HTS) cables in the mixtures at cryogenic temperatures was investigated by systematically varying the insulation system design. Finite element analysis of the electric field enhancements and experimental verification of model cables with varying electrical insulation designs in pure helium and helium-hydrogen mixtures are reported. Triple points formed at the interfaces of the ground layer, the lapped tape insulation, and the gas medium were identified as the culprits. It was concluded that eliminating the micro gaps between the insulating and ground layers and adding stress cones are necessary to achieve high partial discharge inception voltage (PDIV) in HTS cables cooled with a helium gas medium. The results reported and the conclusions drawn pave a path for high power density distribution networks necessary for the electrification of aviation and ships.
Cite this Research Publication : M.T. Nazir, N. Guvvala, A. K. Das, C. H. Kim, S. V. Pamidi and P. Cheetham, “Evaluation of Lapped Tape Electrical Insulation for Gaseous Helium Cooled High Temperature Superconducting Power Cables”, IEEE Transactions on Transportation Electrification, 2024.