training report at ntpc unchahar

1. A PRESENTATION ON VOCATIONAL
TRAINING AT – NTPC UNCHAHAR
P
PRESENTENTED BY
AMIT KUMAR

2. ABOUT NTPC
• NTPC is the largest power generating company in india, was set up
in 1975 to accelerate power development in the country.
• NTPC has installed capacity of (47228 MW).
• NTPC has 18 coal based power stations (35085 MW).
• NTPC has 7 gas based power stations (4077 MW).
• NTPC has 7 power stations in joint ventures (6966 MW).
 NTPC has 9 Solar based Power stations(360MW).
• In 2010 , Government of india granted NTPC status of
‘MAHARATNA’.

3. ABOUT NTPC, UNCHAHAR
• It has energy generating capacity by –
-coal based thermal plant is 1050 MW .
• It has 3 stages consisting 5 units of coal based
thermal plant .
-stage 1 –unit 1 and unit 2(2 x 210MW)
-stage 2-unit 3 and unit 4(2 x 210MW).
-stage 3 –unit 5 (210MW).
• It’s 6th unit is under construction (500MW).

4. DIFFERENT PHASES OF TRAINING
SWITCHYARD
MAIN PLANT
GENERATOR
BOILER
TURBINE
ELECTROSTATIC PRECIPITATOR
COAL HANDLING PLANT

5. DIFFERENT COMPONENT IN SWITCHYARD
CIRCUIT BREAKER
IT IS USED TO BREAK OR
MAKE THE CURRENRT
TYPE OF CIRCUIT
BREAKER SF6

6. LIGHTINING ARRESTOR
 IT IS USED TO PROTECT OUR EQUIPMENT FROM LIGHTINING
SURGES
 MADE UP OF ZNO
 AIR BREAK SWITCH
 IT IS USED TO GROUND THE CIRCUIT AND TO DISCHARGE CB WHEN IT
IS OFF
 VOLTAGE RATING 245KV
 CURRENT 10 KA

7. CAPACITIVE VOLTAGE TRANSFORMER
 USED FOR METERING AND PROTECTION
 REACTER ARE CONNECTED IN SERIES
WAVE TRAP
 IT IS USED TO TRAP FREQUENCY ABOVE 50 HZ
CURRENT TRANSFORMER
USED FOR MEASUREMENT OF CURRENT AND PROTECTION OF EQUIPMENT
TURNS RATIO 800/1
ISOLATOR
SWITCH THAT CAN MAKE OR BREAK CIRCUIT BUT DO NOT REQUIRE
ANY POST CONDITION

8. TURBO GENERATOR

9. EXCITATION SYSTEM
 STATIC EXCITATION SYSTEM -UNIT 1 AND 2 HAVE THIS
ARRANGEMENT WHICH USES SLIP RING AND BRUSHES
 BRUSHLESS EXCITATION SYSTEM- UNIT 3 4 AND 5 HAVE THIS
SYSTEM
 IT CONTAIN 2 EXCITOR ONE IS MAIN EXCITOR AND OTHER IS PILOT
EXCITOR

 TRANSFORMER
 CONVERT ELECTRICAL ENERGY FROM ONE CIRCUIT TO ANOTHER
 HIGH EFFICIENCY
 RATING 250 MVA

10. ACCESSORIES OF TRANSFORMER
 CONSERVATOR
 BREATHER
 BUCHCHOLTZ RELAY
 TEMPERATURE INDICATOR
 STATION TRANSFORMER
 RATING 40 MVA
 USED FOR DEVICE OF OUR PLANT

11. BOILER
 IT IS A PLACE WHERE WATER IS CONVERTED TO STEAM
 STEAM GOES UP AND COLLECTED IN BOILER DRUM
 IT THEN GO TO TURBINE TO ROTATE ITS BLADE AND CONVERT HEAT
ENERGY TO ELECTRICAL ENERGY
 FD AND PA FAN HELP IN THIS PROCESS
 ELECTROSTIC PRECIPITATOR
USED TO PRECIPITATE THE DUST FROM FLUE GAS
FLUE GAS IS PASSED THROUGH DISCHARGE ELECTRODE (EMITTING) TO
COLLECTING ELECTRODE .
DUE TO CORONA ELECTRODE IS IONISED AND ATTRACTED DUST PARTICLE
AND GET ACCUMULATED ON IT
A SYN MOTOR IS ATTACHED TO ELLIMINATE THE DUST PARTICLE

12. COAL HANDLING PLANT
 TOTAL AREA 200ACRE
 CONVEYER LENGTH 13 KM
 TOTAL COAL CONSUMED IN 24 HRS- 12000MT
 PURPOSE IS TO CONVEY COAL TO BUNKER IN SIZE NOT MORE
THAN 20 MM
 AVERAGE COST IS RS 5/KG
 FIRSTLY COAL FROM WAGON GET ACCUMULATED IN TRACK
HOPPER SIZE IS 300 MM
 PRIMARY CRUSHER CONVERT FROM 300 MM TO 150 MM. USES OF
170KW 6.6 KV MOTOR
 SECONDARY CRUSHER CONVERT SIZE INTO 20 MM. USES OF 700
KW MOTOR IS USED

13. .
COAL THEN PASSED THROGH METAL DETECTOR TO REMOVE
FEROUS PARTICLE
THEN ACCORDING TO OUR NEED WE STORE SOME COAL IN
STACKER AND SEND REMAINING PART TO MILL WHICH CONVERT
COAL IN PODERED FORM AND SEND TO BOILER

14. .
THANK YOU