Run-of-River Hydro Power Plants

Run-Of-River Hydro Power Plant normally entails a small dam (or weir) and diversion of water via a canal or pipeline (headrace) to bring the water to the power station. The water is then fed into a high-pressure penstock (or pipeline) which delivers the water under high pressure to the powerhouse, where it drives an installed turbine connected to a generator. The amount of power a hydro station of this type can generate is dependent on the head and flow of the water.  At the outlet of the turbines, the water is discharged back to the river via a tailrace. Spillways are included to allow excess water run-off, should the river levels be very high.  The capacity of the power station is determined by the size of the turbines, and based on the total energy potential of the Head (water pressure) and Flow (quantity of water) of the river.

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