Tidal power, also called tidal energy, any form of renewable energy in which tidal action in the oceans is converted to electric power. When high tide occurs water is collected on dam which is released during low tide generating electricity.
There are a number of ways in
which tidal power can be harnessed. Tidal barrage power systems take advantage
of differences between high tides and low tides by using a “barrage,” or type
of dam, to block receding water during ebb periods. At low tide, water behind
the barrage is released, and the water passes through a turbine that generates
electricity.
Tidal stream power systems take advantage of ocean currents to drive turbines, particularly in areas around islands or coasts where these currents are fast. They can be installed as tidal fences—where turbines are stretched across a channel—or as tidal turbines, which resemble underwater wind turbines
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