Electrical insulation characteristics of PPLP as a HTS DC cable dielectric and GFRP as insulating material for terminations

S. H. Kim, J. H. Choi, W. J. Kim, K. L. Kim, Haigun Lee, Y. S. Kim, H. M. Jang, S. K. Lee

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A high-temperature superconducting (HTS) DC cable system has attracted a great deal of interest from the view point of low loss, dense structure and large capacity compared to HTS AC cable system. It has a HTS cable and a termination. A HTS DC cable system consists of a conductor, cooling system and electrical insulation. To realize the HTS DC cable system, it is important to study not only high current capacity and low loss of conductor but also optimum electrical insulation at cryogenic temperature. The electrical insulation technology of HTS DC cable and termination must be solved for the long life, reliability and compact of cable.In this paper, we will discuss mainly on the electrical insulation characteristics and the insulation design of 220 kV class HTS DC cable. Voltage-time (V-t) characteristics of laminated polypropylene paper (PPLP) in LN 2 were studied. Furthermore, the surface flashover characteristics of glass fiber reinforced plastic (GFRP) for termination insulators under DC and lightning impulse voltage were studied.

Original languageEnglish
Article number6112202
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2012 Jun 25



  • Cable insulation
  • dielectric breakdown
  • dielectric materials
  • superconducting devices

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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