Transmission of Electricity

Overview

Electricity transmission is the process by which large amounts of Electricity produced at power plants (such as hydro, geothermal, thermal and wind), is transported over long distances for eventual use by consumers. Due to the large amount of power involved, and the properties of Electricity, transmission normally takes place at high voltage (132-kilovolt or above) to reduce losses that occur over long distances.

Electricity is usually transmitted to a substation near a populated area. At the substation, the high voltage Electricity is converted to lower voltages suitable for consumer use, and then transmitted to end users through relatively low-voltage Electricity distribution lines that are owned and operated by the national Electricity utility.

The construction, operation, and maintenance of new high-voltage transmission lines and associated facilities create a range of environmental impacts. The type and magnitude of the impacts associated with transmission line construction, operation and maintenance varies depending on line type and size, as well as the length of the transmission line, and a variety of other site-specific factors.

The main components of high-voltage Electricity transmission lines and associated facilities include the following:

Transmission Pylons (Towers)
Conductors (Transmission lines)
Right-of-Way (Way leaves)
Access Roads
Substations