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1. OVERVIEW OF NTPC PLANT
INTRODUCTION
Korba Super Thermal Power Plant is located
at Jamnipali in korba district in the Indian state
of Chhattisgarh.The power plant is one of the coalbased
power plants of NATIONAL THERMAL POWER PLANT
(NTPC). The coal for the power plant is sourced from
Kusmundha and Gevra Mines. The source of water for the
power plant is HASDEO RIVER.
NTPC is India’s largest energy power plant which
was established in 7 Nov. 1975 to generate power
development in India.
There are total 7 units in plant in which 4 units are
of 500MW and 3 units are of 200MW power
produce.
Total consumption of coal for producing 2600MW is
about 48000 tons of coal per day.

2. BOILER
A boiler is closed vessel in which water is converted
into steam by utilizing the heat of coal combustion.
Steam boilers are broadly classified into following two
types:-
(a) Water tube boiler.
(b) Fire tube boiler.
WATER TUBE BOILER:-
In a water tube boiler, water flows through the tubes
and the hot gases of combustion flow over these tubes.
Water-tube boilers are used for high-pressure boilers.

3. TURBINE
A turbine is a rotary mechanicaldevice that
extracts energy from a fluid flow and converts it into
useful work. In which there are THREE types of turbine
used in NTPC power plant are as follows:-
a. High pressure turbine (HP).
b. Intermediate pressure turbine (IP).
c. Low pressure turbine LP).
a. HIGH PRESSURE TURBINE:-
HP turbine is a high pressure turbine the steam comes
through the boiler first goes into HP turbine and it is a
unidirectional turbine.

4. b. INTERMEDIATE PRESSURE TURBINE:-
In IP turbine the steam of HP turbine goes into the air
preheater for reheating and after this steam flows into
an IP turbine.
Hence bigger piping, larger turbine is required to
handle the steam flow. IP section of the turbine is
bigger than HP turbine for this reason.
IP turbine outlet is connected with one or two LP
turbine rotors. LP turbine further expands the steam
generating more energy. Intermediate pressure
turbine is a bi-direction.

5. c. LOW PRESSURE TURBINE:-
The steam of IP turbine directly goes into a LP turbine
for further expands the steam generating more energy.
LP turbine is large in size as compare to IP because it
requires to handle the steam flow.
LPs are the biggest in size since they have the lowest
steam pressures hence require bigger area to handle the
steam flow rate.

6. Fig- COMBINATION OF TURBINE MAIN TURBINE.

7. GENERATOR
Generator is a device which converts mechanicalenergy
of steam comes through the turbine into electrical
energy.
Generating capacity of 500MW is 21KV O/P voltage.
Existing speed of generator is 3000 rpm.
The reverse conversion of electricalenergy into
mechanicalenergy is done by an electricmotor, and
motors and generators have many similarities. Many
motors can be mechanicallydriven to generate
electricityand frequently make acceptablegenerators.

8. GENERATOR TRANSFORMER
Generator transformer is used to store the power
(ELECTRICITY) which is generated by the generator.
FOR 500MW generator transformer gives output of
21KV of voltage and 9000Amp. Of current and for
200MW generator transformer gives output of 15.47KV
of voltage.

9. SWITCHYARD
It is the protective part of the whole power system.
Switch yard is also most essential part for transmission,
distribution, and collection.
A substation is a part of an
electrical generation, transmission, and distribution system.
Substations transform voltage from high to low, or the
reverse, or perform any of several other important functions.
Betweenthe generating station and consumer, electric
power may flow through several substations at different
voltage levels.

10. CONTENTS
 INTRODUCTION.
 BOILER.
 TURBINE.
 GENERATOR.
 SWITCHYARD.