132 33 kv substation training report pdf file download

The work designated to the students was to design a 132KV/33KV EHV sub-station. The work was
carried out under Prof. S. Pal, H.O.D.- EE dept., Techno India. Any sub-station which handles power at over
33KV is termed as extra High Voltage sub-station by the rules implemented by Indian government. The design
process of an EHV sub-station begins with very elemental work of selection of site and estimation of
requirements which includes capital and material. It is also needed to keep in mind, the civil aspects of a substation
design.In India about 75% of electric power used is generated in thermal and nuclear plants, 23% from
mostly hydro station and 2% comes from renewable and other resources. The distribution system supplies power
to the end consumer, while the transmission system connects between the generating stations and distribution
system through transmission line. The entire network forms a power grid and each power grid across the country
is interconnected which facilitates uninterrupted supply.
While designing a power grid the following aspects must be taken into consideration:
 Low capital cost.
 Reliability of the supply power.
 Low operating cost
 High efficiency
 Low cost of energy generation.
 Simplicity of design.
 Reserve capacity to meet future requirements
Starting from the generating stations to the end users, voltage is needed to be stepped up and down several
times in various substations. This ensures efficient transmission of power, minimizing the power losses. Our
project is to design a 132KV/33KV EHV sub-station where the incoming power is received at 132 KV from a
generating station. The power factor is corrected here and the voltage is stepped down to 33KV and power is
then transferred to distribution system of the grid to meet the requirements of the end consumers at their suitable
voltage.