The diagram illustrates the generation of electricity in a hydroelectric power station.
Overall, the process consists of six main stages, beginning with the flow of river water into a reservoir and ending with the production of electricity. The system operates differently during the day and at night.
Initially, the river runs into a high-level reservoir, where dam blocks the flow of water and guides it to the next step. Next, the water enters a tube in the daytime. Once it runs down to the reversible turbines, electricity is generated in the power station. In the generator, the electricity is conveyed by power lines and then connected to the national grid. The remaining water continues flowing to the low-level reservoir.
At night, water returns from the low-level reservoir. While it flows back to the reversible turbines, the device pumps water into the high-level reservoir. There, water keeps flowing during pumping and the intake is closed. During the daytime, the power station repeats its work.