The accompanying diagram elucidates the process of electricity generation within a hydroelectric power station, outlining the flow of water during the day.
The illustrated system works on the principle of potential energy of water, that stored water from river at high level to generate electricity during the daylight and uses the generated electricity during the night light. This process is continuous, relying on storing water at the end of the day, so that the process is repeated the next day.
During the daylight, water from high level reservoir flows through an intake, driven by the gravity force to the power station includes turbines to generate electricity. The generated power transmitted to the national grid via power lines to light the cities. The water after hitting the turbines gathering t low level reservoir. It is wort mentioning that the intake is open during the hole day that allow for continuous flow of water.
At night, electricity from national grid powers the generator which operator to work like a pump to carry water from low level reservoir to high level reservoir. Thus, electricity is generated at the lowest costs and in a renewable and permanent way.