The diagram gives information about the process of producing electricity in a hydroelectric power station.
Overall, there are multiple stages involved in the process, commencing with the water from the river and ending with electricity generated and distributed via grid for national usage.
The process begins when water from the river is stored in a dam, creating a high-level reservoir. During the day, the intake is open, which allows water to flow downwards to reversible turbines in the power station. At daytime, these machines operate the electricity generator, due to the force of the water flow, to create electricity. Subsequently, electricity is then distributed to national grid by the power lines directly linked with the power station.
Following the previous stages, water flowing through reversible machines will be stored at the low-level reservoir. At night, it will be pumped back to the high-level area by the reversible turbines which work as a pumper during this time, thus beginning the cycle once again.