The figure gives information about how electricity is generated through a hydroelectric power station. The diagram provides details about electricity generation.
Overall, the hydroelectric power station has a river, dams, and a power station. A dam is made across the river to create a reservoir. It has two water storage areas (high-level, low-level). A generator is also there, which generates electric current.
Generally, a dam is made across the river to create a reservoir. After that, intake gates are opened during the day, through which water flows at high speed towards turbines rotating within a magnetic field, inducing a current. The electricity generated by the generator is transmitted over power lines to the national grid. This power station works in two ways: during the day, it produces electricity; at night, the high-level reservoir is filled so the generation process can continue during the day.
The power plant has reversible turbines, which operate as generators during daylight. Whereas, at night, they pump water into the high-level reservoir from the low-level reserve water storage. Later, at night, current generation is stopped to fill the reservoir.