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A high- superconducting (HTS) dc cable system consists of an HTS conductor, cooling system, insulating materials, and high-voltage insulation. The insulating materials and high-voltage insulation at cryogenic temperature can be developed for longer life, reliability, and compactness of HTS dc cables. Polypropylene laminated paper (PPLP) has been widely used as an insulating material for HTS ac...
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