Construction of 8000 A class 275 kV gas insulated transmission line

Author

Kuroyanagi, Y. ; Toya, A. ; Hayashi, T. ; Araki, T.

Author_Institution

Tokyo Electr. Power Co. Inc., Japan

Volume

5

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

14

Lastpage

20

Abstract

Class-8000 A 275 kV gas insulated transmission lines (GIL), 138 m and 158 m long, were completed as getaway lines in the Shin Noda substation of the Tokyo Electric Power Co. Inc. in March and May 1988, respectively. The GILs were designed for large current capacity. New techniques used to construct these lines are described. Thermal expansion and contraction of a straight section of a GIL is absorbed by varying the angle of a deflection unit. Supports were designed to absorb a ground depression. GIL units were installed with gantry cranes. Joints of enclosures were welded by an automatic welding machine

Keywords

cable jointing; gaseous insulation; power transmission lines; substations; 138 m; 158 m; 275 kV; 8000 A; GIL; Shin Noda substation; Tokyo Electric Power Co. Inc.; automatic welding machine; gas insulated transmission lines; joints; supports; thermal contraction; thermal expansion; Conductors; Cranes; Gas insulated transmission lines; Ground support; Insulation; Power transmission lines; Substations; Thermal conductivity; Thermal expansion; Welding;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.107249

Filename

107249