Gas-insulated transformers

Abstract This article aims to draw attention of utility companies and their technical staff to the advantages of installing gas-insulated transformers in substations, and the...

byManuel BOLOTINHA


Abstract

This article aims to draw attention of utility companies and their technical staff to the advantages of installing gas-insulated transformers in substations, and the main environmental benefits. The article also presents the most important characteristics and components of these transformers, as well as the maintenance cost savings that can be achieved by using gas-insulated transformers.

Keywords: gas-insulated substation, sulphur hexafluoride, gas coolers, space saving

1. Introduction

A rising demand for electricity in large cities, the lack of space to construct new substations or upgrade the existing ones, and adverse environmental conditions that we are faced with today have encouraged a trend in overpopulated urban areas to tuck away large-scale substations underground. This has led to a growing demand for incombustible and non-explosive, large-capacity gas-insulated transformers (GIT) in order to prevent accidents and ensure compactness of equipment.

Environmental concerns, whether climatic conditions or high levels of pollution in populated areas where the substation is being installed, are another factor justifying the use of GITs.

The main manufacturers of these type of transformers are based in Asia and include Toshiba and Mitsubishi (Japan), Hyosung (South Korea) and Shinlin (Taiwan).

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