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Design of a steam power plant at

KOTA SUPER THERMAL POWER STATION(K.T.P.S)

kota ,Rajasthan

Guided by:- BY:- Abhishek meena

Mr. sunil Madan 09115004,E-1

B.tech,EE ,4th year

Contents Introduction Rankin cycle Coal Handling Plant. Boiler . Turbine and Turbo generator . Excitation sytem Ash handling plant Switchyard Control Panel Conclusion

Introduction

• Location: Bank of Chambal river at up stream of “Kota Barrage”

• Stage I - (Two units each of 110 MW) = 2X110 MW• Stage II- (Two units each of 210 MW) = 2X210 MW• Stage III- (one unit of 210 MW) = 210 MW• Stage IV- (one unit of 195 MW) = 195 MW• Stage V- (one unit of 195 MW) =195 MW TOTAL POWER GENERATION = 1240 MW

Rankin Cycle

fig (2). Steam generation process

Row coal from BCCL. Dhanbad & bilaspur(MP)

To KSTPS from gurla via a single railway

track

Wagon Tripler

Bunkers Crusher house Hoppers

feeders

Coal mills(pulverization)

Boiler furnace ( tangential firing of pulverized coal)

OVERVIEW OF COAL HANDLING PLANT

7

• X 1.Fire tube Boiler :- Low thermal efficiency 2.Water tube Boiler:- Better thermal efficiency • designed to absorb maximum amount of heat released in process of combustion.• The various components of Boiler :-• 1).Furnace:- . (a) pulverized coal used as fuel . (b) UV flame scanners installed. • 2). Superheater (540 degree C)& Reheater • 3). Economiser• 4) Dearator

BOILER

TECHNICAL SPECIFICATION OF BOILER

1.TYPE Water tube ,pulverized fuel

fired, single drum type, tangential firing system 2. MAKE BHEL 3. CAPACITY 680tonnes /hour(210MW)

4. PRESSURE 155 Kg./cm2 [G]

5.TEMPERATURE 540 degree c

TURBINE :-• 1. Impulse turbine : constant cross section blades . 2. Impulse –reaction turbine:- converging blades .

• Turbine is a machine in which shaft is rotated steadily by impact of steam upon blades of turbine .

• Rated speed : 3000rpm

SteamTURBINE

High pressure

Intermediatepressure

Lowpressure

TURBO GENERATOR :-

Designed for continuous operation at the rated output.

Driven by directly coupled steam turbine at a speed of 3000 r.p.m.

Cooling of generator commonly H 2 gas used

Temperature of windings is maintain by H2 coolant

Hydrogen dryers : absorb the impure H2 in generator

o Power is taken from 11kv bus ducts using step down rectifier transformer

o Rectification is done by using thyristors(640V for 110MW generator)

o AVR used for controlling firing angle of thyristor

Bring speed of operation of 3000rpm , voltage is slowly built up .

Synchronization: Voltage Frequency Phase placement Phase sequence Wave form

Generator Excitation

Synchronization

ASH HANDLING PLANT

Electrostatic Precipitator(ESP). :- filtering device

Ash Fly ash (80%).

Used for making bricks.

Cement. Bottom ash (20%)

Used to improve fertility.

Roads.

To collect ash two ponds of capacity 150 & 230 hact. Are available

DRY & WET ASH(20%)

FURNACE

FLY ASH & FLUE GASES (80%)

ESP

HOPPERS

.Cement Factories

CHIMNEY

EXHAUSTED GASES

BLOCK DIAGRAM OF ASH HANLING PLANT

Electrostatic Precipitator(ESP).• Air pollution preventing equipment• It is used to extract suspended particles from flue gases• A high DC voltage is fed to ESP Electrodes that cause corona effect (ionized atmosphere).

SWITCHYARD

• Circuit Breaker• Lightning arrestor• Isolators• C.T‘s & P.T’s • Relays

220 KV System

CIRCUIT BREAKERS

Minimum oil circuit breaker of BHEL makeis used.

rated for 245 KW, 2500 A and 13400 MVA.

ISOLATORProvided in 220KV switchyard and are motor operatedTriple pole double breaker type, L&T make, rated for 245 KV and 1250 A.

P.T. & C.T.

Provided for measuring and protection. They are BHEL make, single phase, oil filled nitrogen sealed outdoor type.

SWITCHYARD

CONTROL ROOM

Fan Control

Turbine Control

Fuel Control Generator ControlStator Rotor TempFor Stator Cooling (a) H2 pressure b) H2O pressure

Conclusion

• “The architecture of the power plant the way various units are linked and the way working of whole plant is controlled make the student realize that engineering is not just learning the structured description and working of various machines, but the greater part is of planning proper management “

THANK YOU….

References• “Kota Thermal Power Plant". Rajasthan Rajya Vidyut Utpadan Nigam Ltd.

• Kota thermal power plant, Wikipedia http://en.wikipedia.org/wiki/Kota_Super_Thermal_Power_Plant

• ESP, Wikipedia . http://en.wikipedia.org/wiki/Deaerator • Economizers.wikipedia http://en.wikipedia.org/wiki/Economiser