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

The picture

illaustrates

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illustrates

the

process

of generation of electricity in a hydroelectric

power

station

.

Overall

, it can be concluded that

,

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the

power

extraction

process

takes place at day

times

whereas

at night

times

the

water

used from a high-level

reservoird

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reservoir

reservoirs

is restored. As the name hydroelectric

power

station

indicates,

water

serves to be the main source

for

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the

power

supply. The

power

station

gets the required

water

supply from a high-level

reservoir

such

as a river, through its dam which allows the

water

intake only at day

times

as it remains closed during the nights. The

water

enters the

power

statio

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station

,where it is processed to obtain the

power

through

generator

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a generator

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which is operated by the reversible turbines. The current so synthesised, is allowed to pass through the

power

lines and supplied to the national grid. The excess

water

is made a way to join the low-level

reservoir

, which is located next to the generation plant.

This

entire

process

takes place only at

day

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daytime

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times

. As mentioned,

the

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electricity generation is halted at night.

However

, the nights are not set free. They witness the

process

of restoring the

water

level in the high-level

reservoir

. The excess

water

which is transferred into the low-level

reservoir

is pumped back to its origin through the reversible turbines in the

power

station

to maintain the

water

level.