Download Gas Insulated Transmission Lines (GIL) by Hermann Koch PDF

By Hermann Koch

Gas-insulated transmission traces (GIL) is a longtime excessive voltage expertise used while environmental or structural issues limit using overhead transmission strains. With an summary at the technical, not pricey and environmental impression and tool method implications of GIL, this consultant presents an entire realizing of its actual layout, positive factors and merits. the writer illustrates how you can review whilst GIL stands out as the top resolution throughout the making plans series and the way to use GIL within the electrical energy strength network.Other key positive factors include:operation and upkeep standards with info on fix tactics, length, and diverse tracking structures permitting the fulfillment of trustworthy and secure operation;a large choice of learned purposes from the world over over the last 35 years, illustrating ordinary fields of program via descriptions of actual initiatives that the writer has labored on; andfuture program chances in a sensible transmission community, used for fixing energy transmission problems.This is a necessary reference for engineers occupied with making plans and executing bulk energy transmission tasks overground, in tunnels or buried. It bargains a concise precis of all parts of the topic and is the fitting reduction for application strength engineers, consulting engineers and brands around the globe.

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Additional info for Gas Insulated Transmission Lines (GIL)

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12 shows a view into the tunnel at the slope with two GIL systems fixed to the side walls of the tunnel. 5 m. The GIL pipes are fixed to steel structures on the tunnel sides and laid on rolls for movements related to the thermal expansion. The 7 m long GIL sections are assembled on-site and the joints are made by orbital welding. To guarantee the small tolerances in diameters and roundness, which are required to meet the high-voltage tolerances and clearances, the hand-welding process has to follow precise welding sequences [33].

Tunnel-laid versions of the GIL may be used in cities and metropolitan areas [42]. 2 World-wide First GIL of Second Generation in a Tunnel The International Telecommunication Union (ITU) chose Geneva to host the Telecom 2003 international exhibition, subject to the proviso that an additional exhibition area would be available. The City of Geneva therefore decided to construct a new hall at PALEXPO, above the A1 highway and near the Geneva–Cointrin international airport. The presence of a very high-voltage line linking Verbois to Foretaille constituted a major obstacle in the way of the future exhibition hall.

These names are in world-wide use today. In 1998 the international standardization organization IEC introduced the name “Gas-Insulated Transmission Line” with abbreviation GIL as the preferred term for use world-wide. The preferred name GIL is for any gas-insulated system, using atmospheric pressure or overpressure inside, which has no switching or breaking function and is longer than 500 m. This is the actual definition of IEC for GIL. The GIL used inside substations and in conjunction with GIS is jointed by flanges and the sealing for gas-tightness is made by O-rings, the same technology as in GIS.

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