g.b.pant engg. college,pauri
TRANSCRIPT
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G.B.PANT ENGG.
COLLEGE,PAURI
AT:-
NTPC LIMITEDBADARPUR THERMAL POWER STATION
BADARPUR,NEW DELHI
FOUR WEEK INDUSTRIAL TRAINING
THERMAL POWER PLANT OVERVIEW
BY:-SANDEEP KUMAR
ELECTRICAL ENGINEERFINAL YEAR,7TH SEMESTERROLL NO.-36GBPEC,PAURI
ENGG.COLLEGE,PAURI
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NTPC at a glance
It is the worlds largest and most efficient powergeneration company.
In forbes list of worlds 500 companies for theyear 2007 ,NTPC occupies 411th place.
NTPC has installed capacity of 29394 mw.
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NTPC at a glance
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About BTPS
The Badarpur Thermal Power Stationhas five
units of Steam
Turbine-Driven
Generators,which has a total
capacity of
705MW.
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ABOUT BTPS
The fuel being used is Coal, which is supplied from the Jharia Coal Field in
Jharkhand.
Water supply is given from the Agra Canal.
SR. NO. capacity No. of generator Total capacity
1. 210 MW 2 420 MW
2. 95 MW 3 285MW
Total 705 MW
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THERMAL POWER PLANT
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OPERATION OF COAL-FIRED POWER PLANT
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THERMAL POWER PLANT
There are basically three main units of a thermal power plant:
1. Steam Generator or Boiler
2. Steam Turbine
3. Electric Generator
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STEAM GENERATOR OR
BOILER
A boiler or steam generator is a device used tocreate steam by applying heat energy to water.
It is a rectangular furnace about 50 ft (15 m)
on a side and 130 ft (40 m) tall.
Its walls are made of a web of high pressure
steel tubes about 2.3 inches (60 mm) in
diameter.
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STEAM GENERATOR OR BOILER
Pulverized coal is air-blown into the furnace fromfuel nozzles at the four corners and it rapidly burns,
forming a large fireball at the center.The thermal radiation of the fireball heats thewater that circulates through the boiler tubes nearthe boiler perimeter.
The water circulation rate in the boiler is three tofour times the throughput and is typically driven bypumps.
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STEAM GENERATOR OR BOILER
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STEAM GENERATOR OR
BOILER
As the water in the boiler circulates it absorbs heat and
changes into steam at 700F or370C.
It is separated from the water inside a drum at the topof the furnace.
The saturated steam is introduced into superheat
pendant tubes.
Here the steam is superheated to 1,000 F or 540 C to
prepare it for the turbine.
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STEAM TURBINE
Steam turbines are used to drive thegenerators, whichproduce electricity.
The turbines are driven by steam generated in 'Boilers' or'Steam Generators.
Energy in the steam after it leaves the boiler is convertedinto rotational energy as it passes through the turbine.
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STEAM TURBINE
The turbine normally consists of three stages with each stage consisting of a
stationary blade (or nozzle) and a rotating blade.
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STEAM TURBINE
Stationary blades convert the potential energy of the steam(temperature and pressure) into kinetic energy (velocity) anddirect the flow onto the rotating
blades.
The rotating blades convert the kinetic energy into forces,caused by pressure drop, which results in the rotation of theturbine shaft.
The turbine shaft is connected to a generator, whichproduces the electrical energy.
The rotational speed is 3000 rpm.
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TURBINE GENERATOR
The generators are used to convertmechanical power, delivered from theshaft ofthe turbine, into electrical power.
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TURBINE GENERATOR
The mechanical energy from the turbine is converted by means a
rotating magnetic field
produced by direct current in the copper winding of the rotor or field,
which generates three-phase alternating currentsand voltages in the copper winding of the stator
(armature).
The stator winding is connected to terminals, which are in turn connected to
the power system for delivery of the output power to the system.
At Badarpur Thermal Power Station,
2-pole, 50 Hz generators are used
3000 rpm, of capacities 210 MW and 95 MW.
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TRANSFORMERS
Step-Up the Voltage from
10.5kV to 220kV for 95 MW Generators.
15.75kV to 220kV for 210MW Generators.220kV output is transmitted to the switchyard for
further transmission.