All the important details are provided in this ppt.

1. REPORT ON
DAMODAR VALLEY
CORPORATION
ELECTRICAL ENGINNERING
(2014-2015)
DR. B.C. ROY ENGG COLLEGE
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2. PRESENTED BY:-
MD SOHAIL AKHTER
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3. INTRODUCTION:
DAMOADAR VALLEY CORPORATION:
 FIRST MULTIPORPOSE RIVER VALLEY PROJECT.
 ESTAIBLISHED IN 7TH JULY 1947,BEING ASIA’S FIRST
THERMAL POWER PLANT.
 TO ARREST THE FURY BY THE RIVER OF SORROW AND
TO HARNESS THE RESOURCES OF DAMODAR VALLEY
COMMAND AREA.
 A POWER GENERATING CAPACITY OF OVER 2710MW.
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4. MISSION AND VISION
 GENERATION,TRANSMISSION AND DISTRIBUTION OF
POWER.
 PREVENT DISASTER
 INDUSTRIAL AND DOMESTIC USE
 ECO-CONSERVATION
 ENRICHING THE QUALITY OF LIVES OF PEOPLE
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5. DVC POWER STATION AT GLANCE:
1)THERMAL
NAME LOCATION CAPACITY
BOKARO-B Dist-Bokaro
State-Jharkhand
630 MW
(3*210 MW)
CHANDRAPURA Dist-Bokaro
State-Jharkhand
890 MW
(3*130 +2*250 MW)
DURGAPUR Dist-Burdhaman
State-West Bengal
350 MW
(1*140 MW + 1* 210 MW)
MEJIA Dist-Bankura
State-West Bengal
2340 MW
(4*210 MW + 2*250 +
2*500)
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6. 2)HYDEL:
NAME LOCATION CAPACITY
TILAIYA River-Barakar
Dist-Hazaribagh
State-Jharkhand
4 MW
(2*2 MW)
MAITHON River-Barakar
Dist-Burdhaman
State-West bengal
60 MW
(3*20 MW)
PANCHET River-Damodar
Dist-Dhanbad
State-Jharkhand
80 MW
(2*40 MW)
TOTAL HYDEL 144 MW
TOTAL THERMAL 2710 MW
GRAND TOTAL 2854 MW
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7. BOKARO THERMAL POWER PLANT STATION
 Equipments
 River intake pump house
 Reservoir pump house
 Water treatment house
 CW pump house
 Boiler plant
 Coal handling plant
 Coal mill
 Ash handling plant
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8.  Turbine generator set
 DM plant
Types of transformer-
 Generator transformer
 Unit auxiliary transformer
 Reserve transformer
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9. LAYOUT OF BOILER
 Furnace-chamber in which cumbustion reaction isolated
 Boiler drum-separate water from steam
 Economizer-preheat boiler feed
 Superheater- three stages of convection type
 Reheater-reheat the steam
 Burners-coal burners and oil burners
 Igniters-twelve igniters per boiler
 Coal bunker-coal is transported
 Mills-pulverize coal to desired fineness
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10.  P.A Fans-handling hot air
 Air preheater-transfer heat from flue gases to air
 F.D. Fans-handling secondary air
 Wind box-supplying secondary air
 Electrostatic precipitator-horizontal gas flow
 I.D Fans-sucking flue gases from furnace
 Chimney-tall RCC structures
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11. LAYOUT OF TURBINE-
HIGH PRESSURETURBINE-
 single flow
 12 stages
 size of blades increases from right to left
 right blade known as CURTIS WHEEL
 left blade known as MULTI LABYRINTH SEALING
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12.  Intermediate pressure turbine
 single flow
 11 stages
 semi flexible coupling
 Low pressure turbine
 double flow
 8 stages
 sealing is done to check air leakage
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13. ALTERNATOR
 Ac motor is based on principle of electromagnetic
induction. A motor is a machine which converts
mechanical energy to electrical energy. It is
robust,cheap,efficient and require little
maintainance.
 V=E+Ia*Ra
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14. PRINCIPLE
 A current carrying conductor placed in a slot of
armature, a force acted upon by the magnetic field
from north pole of the motor from fleming’s left
hand rule. The conductor has tendency to move to
the left hand side, a tangential force acts on the
motor, a torque is developed on the rotor, rotor is
free to move so starts rotating in anticlockwise
direction.
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15. PARTS OF ALTERNATOR
A) STATOR : Consists of following parts-
 1)CORE: ferromagnetic material
 2)COIL
 3)YOKE
 4)VENT: for cooling
 5)TERMINAL BOX
 6)AIR CIRCULATING FAN
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16. B) ROTOR : Consists of following parts:-
 1)SLOTS
 2)SHAFT
 3)BEARING SECTION
 4)FD FAN
 5)COUPLING
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17. FAULTS IN STATOR AND ROTOR
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18. GENERATOR PROTECTION
 INTERNAL PHASE FAULT : Protection is provided by
differential relay
 Unbalance loading of stator winding : Protection is provided by
negative phase sequence relay
 Backup protection : In case of fault persists in the system
and generator is feeding the fault, then backup
protection is feeding the fault.
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19.  Rotor earth protection : This method is adopted to detect
ground fault in rotor winding.
 Loss of excitation : The relay provided to detect loss of
excitation is high speed of mho relay.
 Overheating : It is detected by means of temperature
detector embedded between winding.
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20. Power generation
 Water is taken from river and demineralised and then send to
boiler.
 Super heated steam of 540 degree celsius is formed which
hits turbine with pressure of 137 kg/cm square.
 It rotates turbine to which rotor of generator is coupled when
speed comes to 3000 rpm then building of voltage starts due
to faraday’s law of electromagnetic induction.
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21.  When voltage becomes 15.75kv then this is fed to
transformer to step it up to 220kv,which is bus bar
voltage.
 Generator is synchronized with bus bar and steam is
condensed to water, reused again to generate power.
 power generated :
 KW=KVA*P.F
 KW=247*0.85
 KW=210 MW
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22. SWITCH YARD
 CIRCUIT BREAKER : Switching and current interrupting
device.
 Isolator : Operated under zero amperes current.
 Earthing device : Discharges the charges on conductor to earth.
 Lighting arrester : Discharges excessive voltage to earth.
 Relay : Closes contact when actuating quantity reach a pre-
determined value.
 CURRENT AND POTENTIAL TRANSFORMER : Transforms current and
voltage to lower value for the purpose of measurement,
protection and control.
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23. DIRECT CURRENT SYSTEM
IN CASE OF EMERGENCY DC SUPPLY IS
REQUIRED FOR SEAL OIL PUMP, LIGHTING
ARRESTER AND ALSO OTHER PROTECTIVE
RELAY. THESE REQUIREMENTS ARE MET BY
A COMPREHENSIVE DC SYSTEM. TO TAKE
CARE OF FAILURE OF NORMAL DC SUPPLY A
STORAGE BATTERY OF ADEQUATE CAPACITY
IS PROVIDED.
IT COMPRISES OF-
 Battery banks
 Battery chargers
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24. OPERATION DURING TOTAL POWER FAILURE
I. Switch off the breakers of all incoming & outgoing
lines.
II. Keep control of battery charger at minimum
position.
III. Contact with other stations & ask for power.
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25. TRANSFORMERS
1) GENERATOR TRANSFORMERS
Rating: 250MVA
Voltage ratio: 15.75KV/220KV
Cooling: oil forced, air forced
2) UNIT AUXILIARY TRANSFORMERS
Rating: 16MVA
Voltage ratio: 15.75KV/6.6KV
Cooling: oil natural, air forced
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26. 3) DISTRIBUTION TRANSFORMER
Rating: 1250 KVA
Voltage ratio: 6.6 KV/415V
Cooling: air natural
4) STATION SERVICE TRANSFORMER
Rating: 31.5MVA
Voltage ratio: 220KV/6.6KV
Cooling: oil natural, air forced
5) AUTO TRANSFORMER
Rating: 150 MVA
Voltage ratio: 220 KV/132 KV
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27. COAL HANDLING
 STEPS IN COAL HANDLING:
a. Coal delivery
b. Unloading
c. Preparation
d. Transfer
e. Storage
f. Implant handling
g. Crushing & pulverizing
h. Weighing & measuring
i. Feeding the coal into furnace
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28. MANPOWER OF COAL HANDLING
I. Russian 400MW, Indian 440MW.
II. To know the calorific value.
III. To crush large size raw coal into small size.
IV. To remove impurities & provide good flame to
boilers.
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29. PROCEDURE
Loading coal in wagon machine.
Bringing it on railway track by wagon pusher:
A)boggy fixed in wagon machine
B)bucket is tilted till it lights up the bulb
C)bulb offs means bucket is tilted completely &
coal is filled in bunker hopper
Carrying the coal with the help of conveyor from
bunker hopper.
Crushing the coal through crusher.
Storing the bunker powder.
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THANK YOU