3. • NTPC was founded in 1975 to
accelerate power development in the
country.
NTPC has installed capacity of (
56135MW). It has
• 20 coal based (38755MW).
• 7 gas / liquid fuel based ( 4017MW) .
• 1 Hydropower plant (800MW)
• 9 power in joint ventures ( 7,216 MW).
• 11 Solar based (845MW).
• 1 Wind Power Station ( 2MW).
In May 2010, Government of India
Granted NTPC Status of ‘Maharatna’.
4. It was undertaken by NTPC in 1992 from Uttar Pradesh state Electricity Board.
It has energy generating capacity of 1550 MW.
It has 4 stages consisting 6 units of coal based thermal plant.
Stage 1 – unit 1 and unit 2 (2×210 MW).
Stage 2 – unit 3 and unit 4 (2×210 MW).
Stage 3 – unit 5 (210 MW).
Stage 4 – unit 6 ( 500 MW).
5. • COAL SOURCE
North Karanpura coal field (Ranchi) owned by Central Coalfield Limited Coal Type
: Lignite.
• WATER SOURCE
Sharda Sahayak Canel ( main source ) Dalmau pump Canel (auxillary source).
6.
7.
8. • The function of coal handling plant is automatic feeding of coal
to the boiler furnace.
• A Thermal power plant burnt enormous amounts of coal.
• A 200 MW plant may require around 2000 tons of coal daily
• Following are the process of plants:-
1. Bunkering process
2. Unloading process
3. Feeding process
4. Screening process
5. Crushing process
9. • Boiler also called Steam Generator, apparatus designed to convert
a liquid to vapour.
• In a conventional steam power plant, a boiler consists of a furnace
in which fuel is burned.
• surfaces to transmit heat from the combustion products to the
water, and a space where steam can form and collect.
10. • A device which moves last
traces of moisture.
• It increases efficiency of plant.
• Steam being dry reduces the
mechanical resistance of
turbine.
• No corrosion at the turbine
blades
11. • A steam turbine that extracts thermal energy
form pressurized steam and drives the
generator.
• Turbines used are :
1. High pressure turbine.
2. Intermediate pressure turbine.
3. Low pressure turbine
Combined working of turbines increases efficiency
of plant.
12. • The turbo generator is used to generate power by connecting the shaft of the
turbine to the shaft of the generator which create the magnetic flux producinf EMF.
• The generated voltage will generally 11 kv to 33 kv max. In 500 MW plant
generated voltage is 21kv.
• The generated voltage is stepped up by connecting generator transformer and is
also used for auxilliary purpose.
13. • Generator circuit breakers are very expensive and critical components of all power
plants which ensure protection of turbo generator.
• This is SF6 GCB used in 500 MW plant.
14. • Which condenses the steam at the exhaust of turbine.
• It does it by passing cold water supplied from water
cooling tower.
• The condensed steam can be used as feed water to
the boiler.
15. Remove heat from the water discharged from the
condenser so that the water can be discharged to the
river or recirculated and reused.
Air can be used circulated in the cooling towers through
natural draft and mechanical draft.
16. • It removes suspended particulate matter (dust particles)
from smoke which evolved.
• Electric field is applied in between its electrodes.
• As dust particles are charged get deposited on
electrodes making smoke free of dust.
17. • A switch yard is a part of an electrical generation, transmission system.
• It is used to transmit or receive high voltage power.
• Switchyard transform voltage from ‘high to low’ or the reverse , or perform any of
several other important functions .
18. Transformers are used in NTPC are:-
• Generator transformer – It is combination of three different
transformer 200MVA each. It converts 21 KV to 400 KV. It is of
600MVA.
• Station transformer – It converts 11 KV to 3.5 KV , 16 MVA.
• Unit Transformers – Converts 11 KV to 440V.
• Neutral grounding transformers- Used for neutral of grounding
turbo generator.
19. Main tank
Conservator
Buchholz relay
Breather
Breathing pipe
Tap changer
Radiator
Bushings
Magnetic oil Guage
20. • OUTDOOR EQUIPMENTS
1. BUS BAR
2. LIGHTENING ARRESTER
3. WAVE TRAP
4. CAPACITIVE VOLTAGE TRANSFORMER
5. CURRENT TRANSFORMER
6. POTENTIAL TRANSFORMER
• INDOOR EQUIPMENTS
1. RELAYS
2. CONTROL PANNEL
3. CIRCUIT BREAKER
21. • It is a plant deals with the storage of ash.
• Manufacture of cement ( by ACC Ltd) Amethi &
Reliance Cement Factory Raebareli.
• Manufacture of bricks/ blocks.
• Agriculture as soil amendment/ source of essential
plant nutrients.
22. • The fuel used to quite cheap.
• Less initial cost as compared to other generating plants.
• It can be installed at any place irrespective of the existence of coil.
• The coal can be easily transported to the site.
• It require less space as compared to hydro power to Hydro power plants.
• Cost og generation is less than that of diesel power plants.
23. • It pollutes the atmosphere due to production of large
amount of smoke and fumes.
• It is costlier in running cost as compared to Hydro electric
plants.
• Maintenance cost is more .
