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GURU NANAK DEV ENGINEERING COLLEGE, LUDHIANA

SIX WEEKS INDUSTRIAL TRAINING

THERMAL POWER PLANT OVERVIEW At:At:-

By:By:Pushkar Shanker

NTPC Limited

D3 – Electrical

Badarpur Thermal Power Station

Roll No. – 6278

Badarpur, New Delhi

Univ – 6140508670

ABOUT NTPC LIMITED •

Formally known as National Thermal Power Corporation Limited.



It is among the world’s largest and most efficient power generation companies.



In Forbes list of World’s 500 Largest Companies for the year 2007, NTPC occupies 411th place.



NTPC has installed capacity of 29,394 MW.

ABOUT NTPC LIMITED •

It as • 15 coal based power stations (23,395 MW), • 7 gas based power stations (3,955 MW) and • 4 power stations in Joint Ventures (1,794 MW).

ABOUT POWER PLANT Plant (also referred to as Generating Station or Power Station) is an industrial facility for the generation of electric power.

 Power

 At

Power Plants, generators are used as rotating machine that converts mechanical energy into electrical energy by creating relative motion between a magnetic field and a conductor.

ABOUT BADARPUR THERMAL POWER STATION  The Badarpur Thermal Power Station has five units of Steam Turbine-Driven Generators, which has a total capacity of 705MW.

A top view of Badarpur Thermal Power Station, Badarpur, ew Delhi

ABOUT BADARPUR THERMAL POWER STATION  The fuel being used is Coal, which is supplied from the Jharia Coal Field in Jharkhand.  Water supply is given from the Agra Canal. Table: Capacity of Badarpur Thermal Power Station, New Delhi

Sr. *o.

Capacity

*o. of Generators

Total Capacity

1.

210 MW

2

420 MW

2.

95 MW

3

285 MW

Total

705 MW

THERMAL POWER PLANT  In

a Thermal Power Plant, one of coal, oil or natural gas is used to heat the boiler to convert the water into steam.

 The

steam is used to turn a turbine, which is connected to a generator.

 When

the turbine turns, electricity is generated and given as output by the generator, which goes to the high tension transformer then supplied to the consumers through high-voltage power lines.

THERMAL POWER PLANT

OPERATION OF COALCOAL-FIRED POWER PLANT

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

STEAM GENERATOR OR BOILER A

boiler or steam generator is a device used to create 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.

STEAM GENERATOR OR BOILER  Pulverized

coal is air-blown into the furnace from fuel nozzles at the four corners and it rapidly burns, forming a large fireball at the center.

 The

thermal radiation of the fireball heats the water that circulates through the boiler tubes near the boiler perimeter.

 The

water circulation rate in the boiler is three to four times the throughput and is typically driven by pumps.

STEAM GENERATOR OR BOILER

Schematic Diagram of a Steam Generator or Boiler

STEAM GENERATOR OR BOILER  As

the water in the boiler circulates it absorbs heat and changes into steam at 700°F or 370°C.

 It

is separated from the water inside a drum at the top of 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.

STEAM TURBINE  Steam

turbines are used to drive the generators, which produce electricity.

 The

turbines are driven by steam generated in 'Boilers' or 'Steam Generators‘.

 Energy

in the steam after it leaves the boiler is converted into rotational energy as it passes through the turbine.

STEAM TURBINE  The

turbine normally consists of three stages with each stage consisting of a stationary blade (or nozzle) and a rotating blade.

STEAM TURBINE  Stationary

blades convert the potential energy of the steam (temperature and pressure) into kinetic energy (velocity) and direct 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 the turbine shaft.

STEAM TURBINE  The

turbine shaft is connected to a generator, which produces the electrical energy.

 The

rotational speed is 3000 rpm.

TURBINE GENERATOR  The

generators are used to convert mechanical power, delivered from the shaft of the turbine, into electrical power.

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 currents and 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.

TURBINE GENERATOR  At

Badarpur Thermal Power Station,

 2-pole,

 50

 3000

 of

rpm,

Hz generators are used

capacities 210 MW and 95 MW.

A 95MW Turbine Generator at Badarpur Thermal Power Station, ew Delhi

TRANSFORMERS  Step-Up  10.5kV

the Voltage from to 220kV for 95 MW Generators.

 15.75kV

 220kV

to 220kV for 210MW Generators.

output is transmitted to the switchyard for further transmission.

COAL HANDLING DIVISION  The

processing of coal before it is fired to the furnace, comes under the coal handling division of the power plant.

 The

Coal Handling Division of BTPS has the following parts: 

Railway Wagon Tripler



Conveyor



Coal Storage Ground



Separator



Pulverizer or Bowl Mill

COAL HANDLING DIVISION

Railway Wagon Tripler

Conveyor

Coal Storage Ground

Separator

COAL HANDLING DIVISION  Pulverizers

are used to crush it into fine powered particles. Fired to the Boiler Furnace for combustion

Pulverizer

THANK YOU ANY QUERY??

PUSHKAR SHANKER D3 – ELECTRICAL ROLL NO. – 6278 UNIV - 6140508670

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