Title :
Dielectric characteristics of HTS cables based on partial discharge measurement
Author :
Hayakawa, N. ; Nagino, M. ; Kojima, H. ; Goto, M. ; Takahashi, T. ; Yasuda, K. ; Okubo, H.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Japan
fDate :
6/1/2005 12:00:00 AM
Abstract :
We have discussed dielectric characteristics of liquid nitrogen (LN2)/polypropylene (PP) laminated paper composite insulation system for the practical electrical insulation design of high temperature superconducting (HTS) cables. Focusing on the partial discharge (PD) inception characteristics and mechanism, the volume effect and its saturation on PD inception electric field strength (PDIE) was evaluated at atmospheric and pressurized condition. PD inception characteristics under lightning impulse voltage application were also investigated using an electrical and optical PD measuring system, and compared with those under ac voltage application.
Keywords :
composite insulating materials; high-temperature superconductors; partial discharge measurement; power cable insulation; superconducting cables; N2; PD inception electric field strength; ac voltage application; dielectric characteristics; high temperature superconducting cable; lightning impulse voltage application; liquid nitrogen/polypropylene laminated paper composite insulation system; partial discharge measurement; statistical stressed liquid volume; volume effect; Cable insulation; Dielectric liquids; Dielectrics and electrical insulation; Electric fields; High temperature superconductors; Nitrogen; Partial discharge measurement; Partial discharges; Superconducting cables; Voltage; High temperature superconducting cable; partial discharge; statistical stressed liquid volume; volume effect;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849292
