Application of gas insulated transformers to underground substations in Japan

Author

Tsukao, S. ; Oue, Y. ; Hasegawa, Y.

Author_Institution

Tokyo Electr. Power Co., Japan

Volume

1

fYear

2002

fDate

6-10 Oct. 2002

Firstpage

517

Abstract

Concentration of population and business activities result in high electricity demand in urban areas in Japan. Underground or indoor substations are required to comply with the increasing demand for electricity. Electric utility companies in Japan studied this situation and came to conclude that underground or indoor substations applying gas insulated transformers (GIT) together with gas insulated switchgears (GIS) would be the best solution. Not only 22/33 kV and 66/77 kV but also up to 275 kV class GIT have been applied to underground or indoor substations. More than 100 units and 6000 MVA GIT are owned by electric utility companies in Japan and they are operating satisfactory. This paper presents examples of GIT applied to underground or indoor substations and experiences operation and maintenance in Japanese electric utilities.

Keywords

gas insulated switchgear; gas insulated transformers; power transformer insulation; transformer substations; 22 kV; 275 kV; 33 kV; 6000 MVA; 66 kV; 77 kV; Japan; electric utility companies in; experiences; gas insulated switchgears; gas insulated transformers; indoor substations; underground substations; Buildings; Companies; Costs; Gas insulation; Geographic Information Systems; Power industry; Power transformer insulation; Safety; Substations; Urban areas;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition 2002: Asia Pacific. IEEE/PES

Print_ISBN

0-7803-7525-4

Type

conf

DOI

10.1109/TDC.2002.1178440

Filename

1178440