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1. KOTA SUPER THERMAL POWER STATION
(Kota) Delivered by:-
Krishn Kumar
Assistant Professor
Electical Engg Dept.
R N MODI ENGINEERING COLLEGE
RAJASTHAN TECHNICAL UNIVERSITY, KOTA

2. Mechanical Energy Electrical Energy
1.Thermal Station: - The turbine is rotated by steam which is
produced by the heat generated by burning fuel in boiler e
THERMAL POWER PLANT

3.  The coal is brought and crushed to powder. This is feed to Boiler for producing heat
 In Boiler the water is converted to steam.
 In Super heater the moisture content is removed from the steam and that steam is called
super heated steam
 The superheated steam rotates the shaft of the High pressure turbine
 The Exhausted steam is sent to preheater and the steam then rotates the Intermediate
pressure(IP) Turbine
 The steam from the IP turbine is then feed to low pressure turbine.
 The turbine shaft is connected to the Generator, which produces Electric Power.
 The power generated is then Transmitted.

4. KOTA SUPER THERMAL POWER PLANT
Ideally on the left
Bank of Chambal at up
stream of kota barrage
LAND
Land measuring
approx 250
hectare was
required for the
project
in 1976.
COAL
Coal India ltd supply
coal from its coal
producing
Subsidiaries
BCCL,SECL.ECL
Through railways
wagons.
WATER
The source of water
for power station
is reservoir formed
by Kota Barrage
On the Chambal
river.

5. Stage -1
2*110 MW
Stage-2
2*210 MW
Stage-3
1*210 MW
Stage-4
1*195 MW
Stage-5
1*195 MW
Net power generation= 1240 MW

6. Coal handling plant
D-M Water plant
Boiler
Turbine
Generator
Ash Handling plant
Switch Yard

7. Raw Coal Wagon- Coal is brought to the site through a
Wagon as per requirement.
Wagon tippler-The coal is unloaded from the Wagon
and is transported to crushers and for
storage place through conveyor.
Junction tower- JT’s are used where the conveyor has
any angular deviation.
Primary Crusher-The Raw coal is crushed into fine
pieces to 45mm grit). Primary crusher is also
called Rotary Breaker since the coal is
crushed by a rotating plate.
Secondary Crusher-The fine pieces of coal is crushed to
powder (to 25mm grit)
Rejected- The
stones and
unwanted coal
is rejected
Coal Handling Plant

8. Two way conveyor
Junction Tower
Mill Bunker-The 25mm grit coal is crushed into very fine
powder for feeding the boiler. We will have a spare
Bunker for each Boiler.
BOILER

9. Water in a Power Plant is used for
1. Production of Steam- for rotating turbine.
2. Cooling Purpose- For cooling of various equipment .
Water is recycled and used for various purpose:-Principal problem in HP Boiler is corrosion are
steam impurities these impurities form deposit over
turbine blades.
Raw
Water
Purified
DM
water
For
cooling
purpose
Steam
Conden
ser

10. Reservoir
Water Clarification
DM Plant
(Demineralized Plant)
Chlorification
&
Filtration
Various Equipment
Cooling Water
Cooling Tower
CT
Auxiliary cooling
Water (ACW)
DMCWP
DMCW Demineralized
cooling Water
CWP
CT CWP CWP
Condenser
Boiler
Steam
water
Cool water
Hot water
Hot Well
Dearator
25D  35D
25D  20D
PHE
Various Equipment
D-Degrees
CWP-cooling water Pump
PHE-Pre heat Exchange
Water Cycle

11. Flue gases
Boiler water tubes
& various stages
Boiler
furnace
Pulverized
coal
Air from
environment
via draft fans
Ash
handling
plant
DM water
Super
heated
steam
stack

12. BOILER:-
 The Boiler are capacity steam
generators used purely for
the steam power generation.
 In boiler heat energy is
Released from the combustion
of fossil fuel and heat is
Transferred to different fluids
In the system .
Technical specification-
 Type
 Make
 Capacity
 Steam pressure
 Efficiency
 Steam temperature
tangentially fired natural
circulation
Balanced draft water tube boiler
BHEL
375 tons per hour
139 kg/sq. cm
86.6%
540 deg.
The various heat transfer section in boiler –
 furnace
 Super heater & Reheater
 Economiser

13. In a Thermal Power Plant generally 3 turbines are used to increase the efficiency.
 High Pressure Turbine(HPT): The superheated steam is directly fed to this turbine to rotate it.
 Intermediate Pressure Turbine(IPT): The out put from the HPT is reheated in a reheater(RH) and used to
rotate IPT .
 Low Pressure Turbine(LPT): The Exhausted steam from the IPT is directly fed to rotate the shaft of LPT.
Condenser
HPT IPT LPT
RH
Steam
Super
Heater
Generator
Steam
Shaft
*All the turbines are connected to a single shaft which is connected to the Generator.
Turbine is a m/c which shaft is rotated steadily by impact of steam upon blades of turbine.
It converts heat energy into mechanical energy.

14. Two pole
Synchronous
generator
Rotation
speed
Of 3000 rpm
Of 50 Hz.
H2 gas
For
cooling
Star- delta
connection

15. The Synchronous Generator is used to Generate power by connecting the shaft of the Turbine to the shaft of the
generator which cuts the magnetic flux producing Emf.
 The Generated Voltage will generally 11KV to 20 KV max.
 The Generated Voltage is stepped up by connecting Step up transformer and is transmitted and is also used
for Auxiliary purposes.
Bus Duct
Generator
Transformer
20KV to 400KV
SYNCHRONOUS
GENERATOR
UAT
20Kv to 6.KV
Unit Auxiliary Transformer: This transformer is used to step down the produced voltage and use
for Auxiliary purpose.
Syncronization- Bring speed of 3000rpm ,voltage is slowly built up.
1)Voltage 2)frequency 3)phase displacement
4)Waveform 5) phase sequence

16. The Ash from the boiler is collected in two forms:
1. Bottom Ash(Slurry):It’s a waste which is dumped into a Ash Pond
2. Fly ash: Fly ash is separated from Flue Gases in ESP(Electro static
Precipitator).
Fly Ash
& Flue
Gases
Economizer ESP
Bottom
ash(wet ash)
Ash Pond
Boiler
Cylo
Cement
Factory
Economizer : Reduces the temperature
Chimney
Fly ash
Flue Gases
Flue Gases

17.  Air pollution preventing equipment.
 It is used to extract suspended particles from flue gases.

18.  TWO 220 kv bus bar have been provided in switchyard and are inter connected through
A bus coupler
It consist of several part-
o Bus bar
o Circuit breaker
o Current Transformer
(C.T.)
o Lightning Arresters
o Potential Transformer
(P.T.)
o Isolator

19. Whenever maintanace or repaire work is to be
carried out on equipment in swichyard it is
disconnected from suppy isolation
ISOLATOR IN CLOSED CONDITION

20.  LA also called the surge diverter.
 Connected between line & earth i.e. in
parallel with equipment.
It provides the low resistance path to the
lightning and switching over current.
LA is the first and last equipment in any
switchyard.
INSULATOR:-
Used to provide the proper
Insulation.

21. The current transformer is used to
measure the current in power line.
 Dampers are used to prevent
the vibration in power line.
 It converts the vibrational
energy into relative motion of
dampers.
STOCKBRIDGE DAMPER

22. Fan control-
 Primary Air fan
 Furnace pressure
 Force draft fan
 Induced draft fan
Turbine control-
 Pressure control
 Load control
 Speed control
Fuel control-
 Coal ,oil flow,
 oil pressure
 Flow of air control
Generator control-
 Stator ,rotor temperature
 For stator cooling
a) H2 pressure b) H2o pressure
Steam and water control-
 Drum level control
 Flow of steam & water
 Pressure of steam and water
 Temperature of steam and
water