this is all about DVC at ctps

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2. REPORT ON
DAMODAR VALLEY CORPORATION
AT C.T.P.S

3. 1

4. Dvc at c.t.p.s was started in 1964 as the only power
plant with three bus bar.it consists of six
units(presentely only three are in working).
The plant is situated on the banks of the damodar
river which is about 3kms away from hindustan
steels dugda washery.
Total Installed capacity of ctps is 780MW.
Three working units are each of 140MW rating and
the other are of 120MW.

5. Mission:-
Flood control and irrigation.
Generation,transmission and distribution.
Eco-conservation and a forestation.
Water supply for industrial and domestic use.
Vision:-
To establish DVC as a mega pithead power producer and
distributor in eastern region.

7. Coal and ash handling plant
Coal and ash handling plant
Boiler
Super heater
Economize
Airpreheater
Steam Turbine
Condenser
Cooling tower
Feed water heater
Alternator
Exciter
ElEelcetcrotr sot asttiact picr epcriepcaitpoartor
Boiler
Super heater
Economize
Airpreheater
Steam Turbine
Condenser
Cooling tower
Feed water heater
Alternator
Exciter

8. No.of the
units
Installed
capacity
De rated
Capacity
Unit No.1 140 MW 130 MW
Unit No.2 140 MW 130 MW
Unit No.3 140 MW 130 MW
Unit No.4 120 MW 120 MW
Unit No.5 120 MW 120 MW
Unit No.6 120 MW 120 MW
TOTAL 780 MW 750 MW
Capacity
(MW)
rated
First
synchroni
sing dates
Make of
Boiler
Make of
turbo
Generator
140 10-10-1964 Combustion
engg,USA
GE,USA
140 01-05-1965 Combustion
engg,USA
GE,USA
140 10-07-1968 Combustion
engg,USA
GE,USA
120 02-03-1974 ACC
Backcock Ltd
,India
BHEL, India
120 28-03-1975 ACC
backcock
Ltd,India
BHEL, India
120 29-03-1979 ACC
backcock
Ltd,India
BHEL,
India

9. GENERATOR NOS. 1,2 and 3;
Rating : 165000 KVA Power factor : 0.85
Excitation : 375 Volts Frequency : 50 Hz
ATP : 2 poles Gas pressure : 30 PSI
Seal oil pressure : 2.3 kg/cm2 Diff.pressure : 0.35 kg/cm2
Starter Amp : 6351 Field Amp : 1220
Short circuit ratio : 0.7 Coolant :hydrogen
Connection : (Y) for 15000 and165 KVA Maker :general electric co. (U.S.A)
GENERATOR NOS.4,5 and 6;
Rating : 141176 KVA Power factor : 0.85
Excitation : 433 Volts,1730amps Frequency : 50 Hz
Revolution : 3000 RPM Gas pressure : 2.1 kg/cm2
Startor rating : 138 kv Stator amps : 5906
Connection : (Y) for138000volts and 141176 KVA Phase : 3
Coolant :hydrogen Maker
:BHEL,(BHOPAL),INDIA

10. TURBINE NOS. 1,2 and 3 :
Rating : 140000 Kw RPM : 3000
Steam condition pressure : 1800 Stage : 26
PSIG Temperature : 1000 degree F Rheat temperature : 1000 degree F
Exhaust pressure : 25 degree Hg
Phase : 3
ABS
Frequency : 50 Hz Power factor : 0.85
Turbine No. : 170*124 Maker :general electric co. (U.S.A)
TURBINE NOS. 4 ,5 and 6 :
Rating : 120000 Kw Power factor : 0.85
KVA :141176 Excitation : 433 volts and 1730amps
Stator :138000 volts and 5906 amps Connection and RPM : Y and 3000
Phase : 3 Frequency : 50 Hz
Type : Turbo Coolant :hydrogen
Gas pressure :2.1 kg/cm3 Maker :BHEL,(BHOPAL),INDIA

11. 1
1.COAL HANDLING PLANT
Coal is required in the power house to generate heat so that steam can be generated in
the power house . to generate from row coal boulders into powered form coal handling
plant is required.
ROUTE
1.By road
2.Rail
•Size of coal is 20mm

12. 1
Crusher house
Wagon tippler and
Coal bunker Coal mill
Coal handling plant
weigh bridge
Coal (thru rake)
furnance

14. BOILER
AUXILIARY
TURBINE
AUXILIARY
GENERATOR
AUXILIARY
F.D FANS DEAERATOR SEAL OIL SYSTEM
I.D FANS HOTWELL HYDROGEN COOLING
SYSTEM
BOILER DRUM BOILER FEED PUMP GENERATOR
TRANSFORMER
COAL MILLS CONDENSATE PUMP
COAL FEEDERS LOW PRESSURE AND
HIGH PRESSURE HEATER

15. switching equipment used in the transmission of electricity.
Apart from main bus bar two duplicate buses are provided in
the switchyard . They are used when there is some fault in the
mai bus bar or some maintenace work is to be done in the main
bus bar.
The three bus used in DVC are:
1. 33kv
2. 132kv
3. 220kv
All the generating eguiptments- transformer,generator etc.
are connected to the main bus bar under normal conditions
But when fault occurs the supply is transferred to the
transfer bus with the help of isolators.
Two bus are connected to each other by the bus coupler.
Jumpers are provided in the switch yard to move the wires
either up or down in the yard.

16. DVC suplies bulk power at 33kv,132kv,220kv through a network covering
more than 5500 circuit kilometers.
The dvc grid is interconnected with the state electricity boardof jharkhand
(JSEB),west bengal(WBSEB) and grid corporation of orissa and power grid
corporation of India Ltd.
Existing Links(Ckt kms)
state 33kv 132kv 220kv
Jharkhand 690 2175 898
West Bengal 380 1240 560
Orissa 42
TOTAL 1070 3415 1500
Existing Sub-stations(Nos.)
State 33kv 132kv 220kv
Jharkhand 9 21 7
West Bengal 7 12 4
TOTAL 16 33 11

17. Circuit Breakers
1. SF6 type circuit breaker (132)
2. Minimum oil circuit breaker(132)
•Circuit Breakers
1. SF6 type circuit breaker (132)
2. Minimum oil circuit breaker(132)
3. Vaccum circuit breaker(33kv)
Lightning arresters
Fuse
Load interrupter
Line isolator
relays
3. Vaccum circuit breaker(33kv)
Lightning arresters
Fuse
Load interrupter
Line isolator
relays

18. .
INTERLOCKING SYSTEM
Interlocking system is such type of system by which
the machine is shut down automatically for
preventing any loss when the process is not running
properly or under any abnormal condition .inter lock
is used in
many system present in the power house .
The interlocking system is mainly used in three
portion of the plant ;
1.Boiler feed pump
2.Generator seal oil pump interlock
3.Turbine bearing oil pump

19. coal
storage
Coal
hand
ling
Plant
Boile
r
Ash
Storage
Ash
Handli
ng
plant
Air pre-heater
Flue gases
Econo
miser
Super
heater
turb
ine
R
Y
B
exciter
condenser
Colling
tower
+
Alternator
Induced
draught fan chimney
Force draught fan
Feed water heater
Water treatment
chamber
Feed water pump
Flue gases
Transformer
Exhaust steam
Valve
Circulating water
pump
Hot air
Flue gases
Bus Bar
C.B

20. .
TRANSFORMERS IN POWER SYSTEM
1.Generating Transformer(GT)
It is transformer on which generating terminal voltage is given. It is a set-up
transformer responsible for stepping up the generated voltage to the required
voltage in the switchyard which may be either 132kv or 220 k v .after stepping
up the voltage the power is given to the main bus bar which runs horizontally
in centre throughout a switchyard now from this main bus the electricity is
now ready to distributed to different sub station or direct consumer.
2.Unit Auxiliary Transformer (UAT)
UAT is a step down transformer which is connected to G.T so it step down the
voltage from 132 or 22okv to the required voltage near about 3.5kv.It is used for
providing the require power for the auxiliary unit like coal handling plant ,
coal mil, boiler feedback pump e tc. generally two UAT are connected to on
G.T

21. 1
3.Reserve transformer
In power house there is probability that the G.T can develop some fault or has to be
closed for maintenance in that case the auxiliary unit supply is to be pulled off which
is connected to G.T .this will interrupt in the working of the plant .R.T are present in
the power house to supply power to auxiliary unit .R.T has two teminals;
1.Common auxiliary board (CAB)
2.Startup emergency board (SEB)
( responsible for providing the power )
Apart from these three transformer there are two other types of transformer ;
Potential transformer
Current transformer