Calculation of the Thermal Regime of Gas-Insulated Electrical Transmission Lines
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Gas-insulated transmission lines (GIL) are used for high-power extraction from electric power plants and high power delivery to large cities and industrial centers. A large part of a GIL lies above the earth’s surface. In an overhead configuration GIL are subject to climatic factors that affect their transmission, which is determined by the thermal regime. A method for calculating the thermal regime of overhead GIL is developed which takes the influence of climatic factors into account. Calculations for a specific GIL design are presented and analyzed.
Keywordsgas-insulated transmission line (GIL) overhead line thermal regime permissible long-term current climatic factors
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