The diagram below shows how electricity is generated in a hydroelectric power station. IELTS Cambridge 14 – Test 3 (Task 1)

Question – The diagram below shows how electricity is generated in a hydroelectric power station.
Summarize the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

The flowchart illustrates how a hydroelectric power plant generates electricity. The transfer of electricity to the national grid completes the process, which started when river water entered a high-level reservoir.

The process is divided into day and night phases, with the daylight phases entailing the generation of electricity from a river and the reservoir\’s water storage. The water returns in the opposite direction at night, flowing into the river and the first reservoir.

River water is channelled into a high-level reservoir supported by a dam during the process\’s day phase. An intake area that opens in the daytime and closes at night leads to the power station. The power station\’s turbines use the flow of water during the day to produce electricity. Next, the excess water flows to a low-level reservoir while the generated electricity is transmitted via power lines to the national grid.

In the night stage, the water in the low-level reservoir is pumped back to the power station via the generator\’s turbines, filling the high-level reservoir, which is closed at night. After being stored at the upper level, the river water eventually flows down to restart the cycle.