g.b.pant Engg. College,Pauri

8/14/2019 g.b.pant Engg. College,Pauri

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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.

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g.b.pant Engg. College,Pauri