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Presentation on theme: "PRESENTATION OF INDUSTRIAL TRAINING ON THERMAL POWER PLANT AT NTPC, SHAKTINAGAR Submitted by:- Sunil Kumar Singh. EN -7 th sem. 0708221056."— Presentation transcript:



3  NTPC, the largest power Company in India, was setup in 1975 to accelerate power development in the country.  NTPC has installed capacity of 29,394 MW.  It has 15 coal based power stations (23,395 MW) & 7 gas based power stations (3,955 MW)  4 power stations in Joint Ventures (1,794 MW).  The company has power generating facilities in all major regions of the country.  It plans to be a 75,000 MW company by 2017.

4  Installed Capacity 2000 MW  Location Sonebhadra, Uttar Pradesh  Coal Source Jayant mine  Water Source Rihand Reservoir  Beneficiary States UttarPradesh,Uttranchal, Rajasthan, Punjab, Haryana, Delhi and, Himachal Pradesh, Chandigarh  Unit Sizes Stage - I: 5x 200 MW Stage -II: 2x 500 MW

5  Prime mover coupled to Alternator.  Prime mover is driven by energy obtained from various sources such as burning of fuel, pressure of water, force of wind etc. Fig. Fundamental of generation of Electricity

6 A generating station which converts heat energy of coal combustion into electrical energy is known as a steam power station. Steam is produced in the boiler by utilizing the heat of coal combustion. The steam is then expanded in the steam turbine and is condensed in a condenser to be fed into the boiler again. The steam turbine drives the alternator which converts mechanical energy of the turbine into electrical energy.

7 a. Steam generating equipment b. Condenser c. Prime mover d. Electrical equipment Steam generating equipment includes : Boiler Superheater Economiser Air Pre-heate r

8 Boiler A boiler is closed vessel in which water is converted into steam by utilising the heat of coal combustion. Steam boilers are broadly classified into following two types: (a) Water tube boilers (b) Fire tube boilers In a water tube boiler, water flows through the tubes and the hot gases of combustion flow over these tubes. Water-tube boilers are used for high-pressure boilers Figure-water tube boiler

9 Figure- fire tube boiler

10  A device which removes last traces of moisture.  It helps in reduction in requirement of steam quantity.  steam being dry reduces the mechanical resistance of turbine.  No corrosion at the turbine blades.

11  They are such devices which recover the heat from the flue gases on their way to chimney and raise the temperature of feed water.  Air Pre-heaters recover the heat from the flue gases leaving the economiser and heat the incoming air required for combustion

12  Which condenses the steam at the exhaust of turbine.  It creates a very low pressure at the exhaust of turbine, this helps in converting heat energy of steam into mechanical energy in the prime mover.  The condensed steam can be used as feed water to the boiler.

13  A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into mechanical energy.  About 86% of all electric generation in the world is by use of steam turbines.  It has almost completely replaced the reciprocating piston steam engine.

14  Turbo generator An turbo generator is coupled to a steam turbine and converts mechanical energy of the turbine into electrical energy.  It may be hydrogen or air cooled. Rating of turbo generator is normally 200MW & 500MW.  Transformers (a) main step-transformers, which steps-up generated voltage transmission of power (b) station transformers, general purpose (c) auxiliary transformers, which supply to individual unit- auxiliaries.  Switchgear which locates fault on the system and isolate faulty part from healthy section. It contains circuit breakers, relays, switches and other control devices.

15  Source of coal = Jayant Mines (Madhya pradesh)  Location of source = Near Singrauli (Madhya pradesh)  Distance of source from plant = 5kms  Type of coal = D grade  Coal requirement = 25,000 MT/Day

16 CHP follows three coal paths: 1.Path A-from track hopper to bunkers 2.Path B-from track hopper to stockyard. 3.Path C-from stockyard to bunker. Path A-

17 Path B- Path C-

18  Generally thermal power stations use coal mills or called coal firing system.  Coal is reduced to fineness (-20mm).  This fine powdered coal is called pulverized coal and is carried forward to the burner by air through pipes. MILLS

19  A natural result from the burning of fossil fuels, particularly coal, is the emission of flyash. Ash is mineral matter present in the fuel. For a pulverized coal unit, 60-80% of ash leaves with the flue gas.  Electrostatic precipitator has series of collecting & emitting electrodes in a chamber.  At the inlet of the chamber there are distributer screen.  Hooper and flushing system form a base of chamber.  Efficiency of ESP is approx. 99.8%

20 SWITCHYARD  Switchyard is considered as the HEART of power plant.  It is a junction, which carries the generated power to its destination.  It is basically an open area where many different kind of outdoor equipments are located. eg: busbars, transformers, circuit breakers etc.  Switch yards can be of 400KV, 132KV.

21 Figure-switchyard


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