The diagram below shows how electricity is generated in a hydroelectric power station. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram above demonstrates the process of electricity production happening in a hydroelectric

power

station.

Overall

, the total generation process can be divided into two major portions known as the daytime and nighttime. During the daytime, the dam

firstly

opens intake under the high-level

reservoir

in order to let

water

flow through the

power

station and

finally

into the low-level

reservoir

. In the meantime, the energy generation captures the energy released by

water

pressure when flows run through the reversible turbines and spin the generator. Once the generator rotates quickly enough, electricity can be created. Following that, produced electrical energy flows through the

power

lines in the national grid, where is contributed to store the electricity and transmits it to the rest area of the nation. Simultaneously, the reversible turbines in the hours of the night do contrary works which can be regarded as a pump that pumps lower-level

water

back to a higher

reservoir

. After the

water

level in the higher

reservoir

reaches its standard, the dam

then

closes the intake and stores

water

for the next daytime

power

generation.