Super Session ‘Vision 2020’ IEEE General Meeting 2008 Application of long high capacity gas insulated lines in structures

The need of high power transmission systems is increasing in the near future. Power Supply of large metropolitan areas like New York, London, Shanghai, Tokyo, Sao Paulo, just to name some, will ask for increasing power concentrated in a dense populated area where no overhead line will be accepted. High power underground transmission technology is needed to transport bulk power over long distances. The gas insulated transmission line (GIL)offers this opportunity. The paper presents the status of the work in Joint Working Group B3-B1 on GIL applications in long structures shows that a combination of large tunnels and bridges with GIL electric power transmission is recommended. The multi-use of traffic tunnel projects in Europe is also strongly recommended by the European Union. The share of such expensive structures like tunnels or bridges makes projects more economical for both sides.