Development of large-capacity gas-insulated transformer

Author

Takahashi, E. ; Tanaka, K. ; Toda, K. ; Ikeda, M. ; Teranishi, T. ; Inaba, M. ; Yanari, T.

Author_Institution

Tokyo Electr. Power Co. Ltd., Japan

Volume

11

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

895

Lastpage

902

Abstract

Concentrations of population and business activities result in high electricity demand in urban areas. This requires the construction of large-capacity underground substations. Oilless, nonflammable and nonexplosive equipment is recommended for underground substations. Therefore, several types of large-capacity gas-insulated transformer have been developed. Because the gas forced cooling type was considered to be available up to approximately 60 MVA, all of these gas-insulated transformers are liquid cooled. But the liquid cooling type has the disadvantage of a complex structure for liquid cooling. For this reason, the authors have been studying the development of a simple design for a gas forced cooling, large-capacity gas-insulated transformer. This paper discusses research and development of cooling and insulation technology for a large-capacity gas-insulated transformer and the development of a 275 kV, 300 MVA gas-insulated transformer

Keywords

cooling; gas insulated transformers; power transformer insulation; substations; transformer substations; transformer windings; 275 kV; 300 MVA; cooling technology; design; electricity demand; gas forced cooling; insulation technology; large-capacity gas-insulated transformer; research and development; underground substations; Gas insulation; Liquid cooling; Oil insulation; Petroleum; Power transformer insulation; Research and development; Substations; Sulfur hexafluoride; Transformer cores; Urban areas;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.489349

Filename

489349