Introduction
The
power system is a system which is used to save the electric power for different
demands. it includes many elements that is connected together by special means
to make the system able to achieve its purpose.
There
are three main types of electrical systems that must be integrated to provide
consumers with their demands:
1 – Generation system.
2 – Transmission system.
3 – Distribution system.
Electric
energy occupies the top grade in the energy hierarchy .it finds innumerable
uses in home, industry, agriculture and even in transport.
Advantages
Of Electric Energy:
The
facts that electricity can be transported practically instantaneously, is
almost pollution free at the consumer level and that its use can be controlled
very easily, make it very attractive as compared to other forms of energy.
The
per capita consumption of electricity in any country is an index of the
standard of living of the people in that country .
Energy
Sources:
If
we go back a little in time, we will find that people tried to benefit of the
natural resources – that differ from place to another due to its nature - to
generate the electric power.
The
first resource was the water, and then fossil fuels such as (coal, oil and gas)
were used. But the natural resources are rare in some places; so it was
important to find another source of electrical energy, the nuclear energy was
this source.
The
renewable energy sources are also used like: wind, tidal, geothermal and solar
energy to overcome the pollution that is caused by fuel energy which is
responsible for 25% of earth total pollution.
The following figure is a simple summary for the main elements:
The following figure is a simple summary for the main elements:
Power System Structure
The
following figure shows the power system structure. From this structure
we find that there are different levels of voltage in the power
system.In power system there are three voltage levels:
- Generation level
- Transmission level
- Distribution level
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