Design of HTS tri-axial cable in steady-state operation

N. Hu, M. Toda, A. N. Ozcivan, T. Yagai, M. Tsuda, T. Hamajima

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


By the advantage of more compact structure, small leakage field, and low heat loss, tri-axial cable become to be mainstream design in recently HTS practical project. However, the imbalance current problem was also reported by some practice experiments. Since the HTS tri-axial cable is composed of three concentric phases, an unsymmetrical inductance and capacitance distribution which is determined by twist pitches and radii, gives an inherent imbalance in three-phase currents distribution. In our previous research, we proposed a two sections structure design to overcome this limitation. Inductance has been balanced by twist pitch adjusting. In that case, the imbalance ratio of current only can be caused by capacitance distribution which is depending on voltage and line length. In this paper, we evaluate the thickness of insulation, the unsymmetrical capacitance distribution and cable fabrication error. Then we investigate the imbalance ratio due to the capacitance as functions of voltage and length by using Electromagnetic Transients Program (EMTP).

Original languageEnglish
Pages (from-to)1584-1587
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number20
Publication statusPublished - 2010 Nov 1


  • Cable capacitance
  • Cable inductance
  • Fabrication error
  • HTS superconducting cable
  • Insulation thickness
  • Power transmission line
  • Tri-axial cable

ASJC Scopus subject areas

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


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