Title :
Study on an after-laying test for a long-distance GIL
Author :
Araki, Takeshi ; Nishima, H. ; Hata, Hiroki ; Yamaguchi, Hitoshi ; Yamauchi, Takashi ; Miyashita, Makoto
Author_Institution :
Sumitomo Electr. Ind. Ltd., Osaka
fDate :
7/1/1998 12:00:00 AM
Abstract :
Technologies for the after-laying test of long-distance SF6 gas insulated transmission line (GIL) have been developed for the detection of partial discharge (PD) and contact defects. We constructed a long (168 m) test line in a deep tunnel and clarified the propagation characteristics of PD signals through the GIL as well as the spatial sensitivity and S/N characteristics of PD sensors for locating metallic particles. We have also proposed the application of a fiber-optic temperature distribution sensor for locating contact defects and confirmed the validity of this sensor for the GIL test line
Keywords :
SF6 insulation; cable laying; fibre optic sensors; insulation testing; partial discharges; power cable insulation; power cable testing; power transmission lines; temperature distribution; temperature measurement; 168 m; 275 kV; PD signals propagation; S/N characteristics; SF6; SF6 gas insulated transmission line; after-laying test; contact defects; deep tunnel; fiber-optic temperature distribution sensor; metallic particles location; partial discharge detection; propagation characteristics; spatial sensitivity; Conductors; Gas insulated transmission lines; Insulation; Optical fiber devices; Optical fiber sensors; Optical fiber testing; Partial discharges; Sensor phenomena and characterization; Temperature distribution; Temperature sensors;
Journal_Title :
Power Delivery, IEEE Transactions on
