Transmission Line: Definition and Importance
A transmission line is a set of conductors used to transport electrical power from one place to another. It is an essential component of the electrical power system that plays a vital role in delivering electricity to homes, businesses, and industries.
The primary function of a transmission line is to transfer
electrical power at high voltage over long distances with minimum power loss.
The reason for transmitting power at high voltage is to minimize the energy
loss that occurs due to resistance in the conductors. This is achieved through
the use of transformers that step up the voltage to very high levels, typically
in the range of 110 kV to 765 kV, for long-distance transmission.
Transmission lines are typically made of either aluminum or
copper conductors that are suspended from high towers using insulators. The
towers are spaced at regular intervals to support the weight of the conductors
and maintain the required distance between the conductors and the ground or
other objects. The spacing between the conductors is critical to prevent
electrical arcing and ensure safe operation.
Transmission lines can be either overhead or underground.
Overhead transmission lines are the most common type of transmission line and
are used to transport power over long distances. Underground transmission lines
are used in urban areas and other sensitive locations where the aesthetic and
environmental impact.
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