Energy
The power to perform work, produced from natural phenomena (e.g., the Sun and the wind) or raw materials (e.g., coal and petroleum).
HYDROELECTRICITY
A nonpolluting renewable energy source, hydroelectricity accounts for 20% of the electricity consumed around the world.
hydroelectric complex
The reservoir structures and installations that use water power to produce electricity.
generator unit
Device with a turbine that transmits the water’s mechanical energy to the generator’s rotor to make it turn to produce electricity.
examples of dams
There are masonry dams, concrete dams and embankment dams; the choice depends on criteria such as the nature of the ground, the shape of the valley and the materials available.
steps in production of electricity
In a hydroelectric power plant, water is turned into electricity, which is carried to consumers along a transportation and distribution network.
electricity transmission
Electricity is carried by overhead and underground lines; due to high cost, underground lines are used mainly in cities.
