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Overhead Line Design and Transmission Line Construction

The fundamental purpose of a Transmission or Distribution Line is to carry the active power from one point to another.

A Transmission line should possess the following characteristics:

• The voltage should be kept as constant as possible over the entire length of the line.
• The line losses must be small so as to obtain a high transmission efficiency
• The Copper losses must not overheat the conductor.

Components of a High Voltage Transmission Line

1. Conductors

• Conductors are always bare
• They are the vital link in the transmission system and distribution system
• They must be designed to meet the specified voltage level
• The conductor consideration should include the voltage level at which the power is transmitted, the maximum allowable losses on the line, the maximum thermal capacity of the line, the current carrying capacity and the tension of the line
• Factors which affect the location of the line include the climate of the country, the atmospheric conditions and vibration of the line

See detail : Overhead Line Design and Transmission Line Construction