NTPC Seminar Report by Harsh Shekhar

8/13/2019 NTPC Seminar Report by Harsh Shekhar

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ABSTRACT

Everybody must be having a thought that a thermal power plant is a place where electricity

is produced. But do you know how it is produced? The answer as it seems is not so easy.Here we use different fuels i.e. coal, natural gas, uranium (radioactive element. The

chemical energy stored is converted to heat energy which forms the input of power plant

and electrical energy produced by the generator is the output. !n a convectional power plant

the energy is first converted to a mechanical work and then is converted to electrical

energy.

The first energy conversion takes in what is called a Boiler or "team #enerator, the second

in what is called a Turbine and the last conversion takes place in the #enerator.

$ow one may imagine how ! know so much. !t%s simple& ! had an opportunity to view all

this very closely with one of the biggest power generating utility of world i.e.NTPC.!t is

!ndia%s largest power generating utility generating more than ')thof the country%s entire

power generation, i.e. $T*+ today lights up every fourth bulb in the country. ith an

installed capacity of -')/ 0 (as on '1.''.-112 from its -2 stations spread all over the

country. 3ecently $T*+ was ranked third best employer and the $o. ' *ublic sector

undertaking among --1 ma4or companies in !ndia by Business Today 5 Hewitt 6ssociation

Best Employers "urvey -112.!t has climbed many stairs of rewards and recognition on

$ational and !nternational level. !t also bears the prestigious !"78 /11' and !"78 ')11'

certificates for international standards of production and eco friendly drive at all stations.

$ational Thermal *ower +orporation has been the power behind !ndia%s sustainable power

development since $ovember '/9. +ontributing -:; of country%s entire power

generation, $T*+ today lights every forth bulb in the country.


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CHAPTER 1

INTRODUCTIONINTRODUCTION

'.'. NTPC LTD. AN OVERVIEW:

!ndia%s largest power company, $T*+ was set up in '/9 to accelerate power development

in !ndia. $T*+ is emerging as a diversified power ma4or with presence in the entire value

chain of the power generation business. 6part from power generation, which is the

mainstay of the company, $T*+ has already ventured into consultancy, power trading, ash

utili>ation and coal mining. $T*+ ranked 22thin the -1'-,


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1.1.'. DIVERSI(IED GROWTH:

6s per new corporate plan, $T*+ envisages to have an installed capacity of '-@ # by the

year -12- with a well diversified fuel miF comprising 9:; coal, ':; gas, ''; nuclear

energy, /; renewable energy and @; hydro power based capacity. By -12-, non fossil fuelbased generation capacity shall make up nearly -@; of $T*+%s portfolio

!n terms of operations, $T*+ has always been considerably above the national average.

2

Fig. 1.1: Operatingperformance of NTPC vsall India

Fig.1.2: NTPCscontribtion to Indiastotal po!er


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1.1.). (INANCIAL PER(OR*ANCE:

S.

No.P!+"%$,!+#

Con#o%d!"ed

Ye!+ ended

)1.-).'-1) A,d%"ed/

Ye!+ ended

)1.-).'-1' A,d%"ed/

1 ' 0

' !ncome from operations

(a $et sales :/9-@/ :)/9@2-

(b 7ther operating income ')-2/2 /2)/2

To"! %n$o2e f+o2 ope+!"%on#

ne"/

3)430' 350)'5

- E6pen#e#

(a


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deeply ingrained in $T*+Is culture. Through its eFpansive +"3 initiatives, $T*+ strives to

develop mutual trust with the communities that surround its power stations.

1.1.7. REHABILITATION AND RESETTLE*ENT POLICY:

$T*+ has been a committed and socially responsible organi>ation since its inception and

has formulated specific guidelines for the welfare of *ro4ect 6ffected *ersons (*6*Is. !t is

one of the firsts in the corporate sector to formulate comprehensive resettlement and

rehabilitation policy for addressing the issue of *6*s. !n line with its social ob4ectives, the

company has focused on effective rehabilitation and resettlement (3C3 of *6*s and also

community development works in and around the pro4ects.

1.1.5. CORPORATION AND SOCIAL RESPONSIBILITY POLICY:

To contribute to sustainable power development by discharging +orporate "ocial

3esponsibilities.

To lead the sector in the area of 3esettlement C 3ehabilitation and *eripheral

Gevelopment.

To lead the sector in Environment *rotection.

+orporate "ocial responsibility has been synonymous with $T*+%s core business of power

generation. $T*+ aspires to provide access to resources needed for a decent standard of

living for the people in its vicinity. $T*+ spirit of caring and sharing is embedded in its

mission statement.

1.1.3. NTPC ENVIRON*ENT POLICY:

"ince its inception $T*+ has been at the forefront of Environment management. !n

$ovember '//9, $T*+ brought out a comprehensive document entitled $T*+

Environment *olicy and Environment 0anagement "ystem. 6mongst the guiding

principles adopted in the document are the companyIs pro=active approach to environment,

9


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optimum utili>ation of euipment, adoption of latest technologies and continual

environment improvement. The policy also envisages efficient utili>ation of resources,

thereby minimi>ing waste, maFimi>ing ash utili>ation and ensuring a green belt all around

the plant for maintaining ecological balance.

The "ingrauli region falls in two districts i.e. "idhi in 0adhya *radesh and "onebhadra in

:

1.1.4. SINGRAULI AT A GLANCE:

$T*+ "ingrauli is known as 07THE3 *D6$T of $T*+ as it is the first "uper Thermal

*ower *ro4ect of $T*+. !n '/@ it was a clean state. ntil the first sketches of an idea were

scribed on it. 6nd then, in no time, it seems, what was a dream became a reality.

Add+e##

*.7. "haktinagar=-2' ---, Gist.

"onebhadra, ttar *radesh

App+o8ed $!p!$%"& -1110

In#"!ed C!p!$%"& -111 0

Lo$!"%on "onebhadra, ttar *radesh

Co! So,+$e AayantBina 0ines

W!"e+ So,+$e 3ihand 3eservoir

Benef%$%!+& S"!"e#

ttar *radesh, ttranchal ,3a4asthan,

*un4ab, Haryana, Gelhi and Aammu C

Jashmir, Himachal *radesh, +handigarh

App+o8ed $!p!$%"& -1110

"tage=! 5 9K-11 0

"tage=!! 5 -K911 0

Un%"# $o22%##%oned

nit=' -11 0


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ttar *radesh There are three "uper Thermal *ower "tations*ro4ects in this region

"ingrauli, indhyachal and 3ihand. "ingrauli and 3ihand plants are in "onebhadra district

of ttar *radesh, whereas the indhyachal *lant is in the "ingrauli district of 0adhya

*radesh. They are fed by the 3ihand 3eservoir and the $orthern +oalfield +ompany

Dimited.

CHAPTER 'CHAPTER '

A PULVERISED COAL (UELED POWER PLANTA PULVERISED COAL (UELED POWER PLANT

6 typical pulveri>ed coal fueled power plant is based on 3ankine Thermodynamic cycle.

L6 3ankine cycle is a vapour cycle that relies on the isentropic eFpansion of high pressure

gas to produce workM. Det us see a superheat 3ankine cycle8

Fig 2.1: #per $eat %an&ine cycle

here,

t5 mechanical power produced by turbine

This facility first produces steam in a boiler (steam generator. This steam is used to rotate

turbine which is connected to a shaft of generator. Hence electricity is produced here. The

used steam is then condensed in a condenser, and the condensed liuid is used again in the

steam generator.


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steam generator. Then it is fed through the er . ed air. The first energy conversion is carried in Boiler or steam generator&

the second is carried out in Turbine and the last one carried out in the #enerator.

Fig 2.2: 'nergy conversion flo! diagram.

!nitially the superheated steam is fed to High *ressure (H* turbine. !t has a temperature of

9)1N + (approF. and a pressure of about ')1 Jgcm -. Then the eFhausted steam from it is

taken to the reheater so that it can be reheated and fed back to !ntermediate *ressure (!*

turbine. Here the temperature is maintained the same as that of superheated steam but

pressure is reduced to 29 Jgcm-. Then the eFhausted steam is directly fed to Dow *ressure

(D* turbine having the reduced temperature and pressure of about ' Jgcm-. Then the

eFhausted steam from the D* section is condensed in the condenser. The condensed liuid

is moved from condenser by +ondensate *umps through Dow *ressure 3egenerative


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an isolator. Three phase system is used for the power transmission. Each generator has its

own switchyard and transmission arrangement.

'.1. PROCEDURE:'.1. PROCEDURE:

The basic understanding of the modern thermal power station in terms of ma4or systems

involved can be done under three basic heads vi>. generating steam from coal, conversion

of thermal energy to mechanical power and generation C load dispatch of electric power.

1. Co! "o S"e!2:

The coal is burnt at the rate up to -11 tonnes per hour. ing mill, where it is powdered

as fine as flour. 6ir is drawn in to the boiler house by drought fan and passed through *re=

heaters. "ome air is passed directly to bunker and rest, through primary air fan, to

pulveri>ing mill where it is miFed with powdered coal. The miFture is then carried to

bunker of furnace where it miFes with rest of the air and burns to great heat. This heats

circulating water and produces steam, which passes to steam drum at very high pressure.

The steam is then heated further in the "uperheater and fed to high pressure cylinder of

steam turbine. The steam is then passed to other cylinders of turbine through re=heater. The

spent steam is sent to condenser, where it turns back to water called condensate.

+ondensate is sent to lower part of steam drum through feed heater and economi>er. The

flue gases leaving boiler are used for heating purpose in feed heater, economi>er, and air

*re=heater. The flue gases are then passed to electro=static precipitator and then, through

draught fan, to chimney.

+oal from the coal wagons is unloaded in the coal handling plant. This coal is transported

upto the raw coal bunkers with the help of belt conveyors. +oal is transported to bowl mills

by coal feeders. The coal is pulveri>ed in the bowl mill, where it is ground to a powder

form. The mill consists of a round metallic table on which coal particles fall. This table is

rotated with the help of a motor. There are three large steel rollers, which are spaced '-1

apart. hen there is no coal, these rollers do not rotate but when the coal is fed to the table

it packs up between the roller and the table and these forces the roller to rotate. +oal is

crushed by the crushing action between the rollers and the rotating table. This crushed coal

/


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is taken away to the furnace through coal pipes with the help of hot and cold air miFture

from the primary air (*.6. fan. The *.6. fan takes atmospheric air, a part of which is sent

to the air pre=heaters for heating while a part goes directly to the mill for temperature

control. 6tmospheric air from forced draft (er and reaches the boiler drum.

ater from the drum passes through down comers and goes to bottom ring header. ater

from the bottom ring header is divided to all the four sides of the furnace. Gue to heat and

the density difference water rises up in the water wall tubes. ater is partly converted into

steam as it rises up in the furnace. This steam and water miFture is again taken to the boiler

drum where the steam is separated from water. ater follows the same path while steam is

sent to the super heaters for superheating. The super heaters are located inside the furnace

and the steam is superheated (9)1+ and finally goes to the turbine.


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turbine shaft, operates the control valves to regulate the amount of steam used (this depends

upon the speed of the turbine and the amount of electricity reuired from the generator.

"team from the control valves enters the high pressure cylinder of the turbine, where it

passes through a ring of stationary blades fiFed to the cylindrical wall. These act as no>>les

and direct the steam into a second ring of moving blades mounted on a disc secured to the

turbine shaft. This second ring turns the shafts as a result of the force of the steam. The

stationary and moving blades together constitute a stage% of the turbine and in practice

many stages are necessary, so that the cylinder contains a number of rings of stationary

blades with rings of moving blades arranged between them. The steam passes through each

stage in turn until it reaches the end of the high pressure cylinder and in its passage some of

its heat energy is changed into mechanical energy. The steam leaving the high pressure

cylinder goes back to the boiler for reheating and returns by a further pipe to the

intermediate pressure cylinder. Here it passes through another series of stationary and

moving blades. ed. er and the boiler for reconversion into steam. The cooling

water drawn from the reservoir is returned directly to the source after use.

). *e$9!n%$! "o Ee$"+%$! Powe+:

The shaft is connected to an alternator%s armature. Thus the armature is rotated and electric

current is produced in the stator%s windings. The generated electricity is of order -9,111

volts. The turbine shaft is mechanically coupled to the generator rotor shaft through thrust

bearings. The steam rotates the turbine at 2111 rpm thus the rotor of the generator also

rotates at 2111 rpm. This speed is necessary to generate electricity at a freuency of 91 H>

with a two pole turbo= generator. The rotor carries the field winding over it. This field

''


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winding is eFcited by a G+ eFcitation system. The supply to the eFcitation system is tapped

from the unit auFiliary transformer. The fluF generated by this field current cuts the

armature coil. The armature coil is star= star connected and is induced with three phase emf.

The emf is tapped with the help of slip rings and brushes. This emf is carried over to the

generator transformer through a bus duct. The bus duct is voltage transformer grounded.

CHAPTER )CHAPTER )

COAL HANDLING PLANTCOAL HANDLING PLANT

Every thermal power plant is based on steam produced on the eFpanse of heat energy

produced on combustion of fuel.


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Fig ".1: C$P bloc& diagram

*ath 6

*ath B

'2


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*ath +

Each of the $T*+ pro4ect reuires transportation of coal from the coal mine to the power

station site of the order of 21111 tones per day, for a typical -111 0 station. This need is

fulfilled by the transportation of coal from open cast mines through 0#3 (merry go roundtransportation system for the span of its entire operational life.

).1. ADVANTAGES O( THIS SYSTE*8

'8 High loading enables loading of train uickly thus achieving high turnover of wagons

and reduction in rolling stock reuirement.

-8 Top open railway wagons are loaded with maFimum possible load constantly and

accurately

28 "imple loading arrangement at single point avoids the need for a big marshalling yard

with cumbersome operational system.

The high speed load outstation consists of one or two loading silos the capacities of silos of

the $T*+ pro4ect is -)11)111 tones. The run of mine coal is si>ed to -11mm by the

primary crushing arrangement at the min. 6 sampling unit suitable for -1mm si>e coal is

provided at the feed point of the loading silo to collect sample for uality analysis. There is

an independent closed circuit of railway system used for carrying coal from plant to +.H.*.

and vice versa. The coal handling plant is capable to load 2- wagons in an hour.

).'. PROCEDURE O( COAL HANDLING:

The typical schematic procedure of coal handling system is given as follows8

'8 The -11mm coal is received at the track hopper if fed to the crusher house to a series of

conveyors. !n the crusher house, ) crushers of 91; capacity are provided and these are

preferred two crushers of '11; capacity, because of increased reliability and possible

higher availability.

')


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-8 6 series of parallel conveyors thereafter are designed either to carry crushed coal directly

to the boiler bunkers or to divert it to the stockyard. To feed coal into bunkers mobile

trippers have provided over bunkers conveyors.

28 The coal mills and, therefore also, the bunkers conveyors of the -110 units of the

earlier pro4ects are provided between boiler and turbo generator building. However, for

better mill maintenance, accessibility and to reduce coal dust nuisance in the turbine plant

area, coal mills and bunkers conveyors are now being placed between boiler and E"*s. The

mills for 911 0 units are located on the both sides of boiler.

).). COAL HANDLING EUIP*ENTS:

There are many coal handling euipments in "ingrauli power pro4ect, an independent coal

handling system is provided for each stage of the pro4ect having '111 0 capacity. The

gross calorific value of typical power grade !ndian Bituminous coal is normally in the range

-11)911 kcalkg. The various coal handling euipments used are given as follows8

!dlers

'8 Troughing idlers.

-8 Troughing trainer.

28 3eturn trainer.

)8 !mpact idler.

98 3eturn idler

*ulleys

+onveyers belt

Grive unit

Take=ps "kirt board

"crapper8

'8 "teel blade scrapper.

-8 3ubber blade scrapper.

28 $ylon brush scrapper.

)8 +ompressed air blast scrapper.

+rusher

'9


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ibrating screen

"tacker=cum=re=claimer

Gigging wheel

0agnetic separators

*lough feeder

ibrating feeder

Trippers

'8 0otori>ed tripper.

-8 Belt propelled=manually operated tripper.

28 inch driven tripper.

The detailed description of each component is given as follows8

!dlers8

The idlers are used for keeping the belt conveyers in motion properly and to support the

conveyers.

Grive unit8

This is used to drive the conveyer belt under all kinds of loading situation. !t comprises of

motor coupled to reduction gearboF with the help of fleFible couplings on the high=speed

shaft of the gearboF. The provision of the fluid coupling ensures the elimination of starting

shock.

Take=ps8

This is used to maintain a slack side tension necessary for the drive to operate the belt.

"kirt board8

This is used in con4unction with chutes at the tail end. They guide the materials centrally

on the belt while loading until it has settled down on the belt.

"crapper8

+onveyers are provided with scrappers at the discharge pulley in order to clean up the

carrying side of the belt and avoid the wear of return idlers due to the built up material on

idler rolls.

+rusher8

':


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The role of crusher is to crush the coal from -11mm to -1mm si>e of coal received from the

vibrating screen. The coal enters the top of the crushers and is crushed between rotating

granulators and fluid cage path. This crushed coal through a chute falls on belt feeder.

ibrating screen8This is used to send the coal having si>e less than -1mm to the belt feeder through the

bypass chute bypassing the crusher and to send the coal of more than -1mm si>e to crusher.

#enerally in each crusher, there are four vibrating screens having capacity of :11

toneshour.

"tacker cum re=claimer8

This is used for stacking and reclaiming the coal from stockyard. #enerally two stacker=

cum re claimers have been provided at each of the $T*+ pro4ect. Their normal capacity is-11 tones per hour and maFimum designed capacity is )91 tones per hour.

Gigging wheel8

The digging wheel is used for cutting and lifting the coal from the stockyard to the belt used

for transferring coal from the yard. The above transfer takes place in case of reclaiming the

coal only.

0agnetic separators8

This is an Electro magnet placed above the conveyors to attract the magnetic particles

present in the coal during continuous electricity supply.

*lough feeder8

The plough feeder is normally installed under slot bunkers or hoppers. !t is imperative that

the feeder is fed properly allowing even feed of material to the rotor blade.

ibrating feeder8

!t is used for throwing the coal on the underground conveyor belt from where coal goes to

the bunker. +oal from the stockyard, with the help of bulldo>er, is taken to the vibrating

feeder via re=claimer hopper and underground conveyor belt.

Trippers8

The tripper is provided in the conveyors to stack the material at desired location on either

side or along the conveyors with the help of chutechutes fitted with the tripper itself.

'


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).7. *ILLS:).7. *ILLS:

These are basically coal pulveri>ing mills. Thermal power stations use pulveri>ed coal

firing system.!n this the coal is reduced to fineness such that 1 to @1; passes through a-11 mesh sieve. This fine powdered coal is called pulveri>ed coal and is carried forward to

the burner by air through pipes.

).7.1. ADVANTAGES O( PULVERI;ED COAL (IRING SYSTE*:

'. Efficient utili>ation of low grade and cheap coal.

-. es coal to a si>e of -11 microns

with a purity of :11 micron. Bowl mills are available in varying capacities ranging from '.

to '11 tons per hour. 6 -11 0 unit uses : mills of 2- tons per hour capacity, out of which

)=9 run at a time and one is in stand=by condition for emergency. 6 911 0 unit uses @

mills of :1 tons per hour capacity, out of which := run at a time.

CONSTRUCTION:ontally mounted two pole cylindrical rotor

type, synchronous machine driven by steam turbine. The stator windings are cooled by de=

minerali>ed water flowing through the hollow conductor while the rotor winding is cooled

by hydrogen gas maintained inside the machine.


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The core of an electrical power system is generator. Guring operating conditions certain

components of the generator are sub4ected to increase stress and therefore, could fail,

referred to as faults. !t can be internal fault or eFternal fault depending upon whether they

are inside or outside of the machine. The machine with fault must be tripped immediately.

The corrective measures against generator%s abnormal operation are taken care by stubborn

system.

T!# of "9e p+o"e$"%8e #"e2:

Getect abnormal condition or defect.

Dimit its scope by switching to isolate the defect.

6larm the operating staff.

nload andor trip the machine immediately.

Re,%+e2en" of p+o"e$"%8e de8%$e#:

"electivity8 7nly that part of the installation containing fault should is

disconnected.

"afety against faulty tripping8 There should be no trip when there is

no fault.

3eliability8 The device must act within the reuired time.

"ensitivity8 Dowest signal input value at which the device must act.

Tripping time8 There should be a clear a distinction between the

tripping time of the device, considering the circumstances such as current

and total tripping time for the fault.

P+o"e$"%8e De8%$e#

The choice of protective euipment for the generator should precisely understand the type

of fault and do the necessary preventive measures for avoiding it. There are two types of

protection namely $!## A for electrical protection and $!## B for mechanicalprotection.

Ee$"+%$! p+o"e$"%on

Gifferential protection8

#enerator differential

6T differential

7verhead line differential

#.T. restricted earth fault, 0ain

-/


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7verall differential

8

Fig .1: generator

4.'. TRANS(OR*ERS6 static piece of apparatus with two or more windings which, by electromagnetic induction,

transformers a system of alternating voltage and current into another system of voltage and

current usually of different values and at the same freuency for the purpose of transmitting

electrical power.

T&pe# of "+!n#fo+2e+#8

*ower transformer 8

sed in transmission network of higher voltages, deployed for step=up and step down

transformer application ()11 k, -11 k, ''1 k, :: k, 22k, --k

Gistribution transformers:

sed for lower voltage distribution networks as a means to end user connectivity. (''k,:.: k, 2.2 k, ))1, -21

T+!n#fo+2e+ !,6%%!+%e#:

Q 3adiators

Q cooling fans, oil pumps, oil to water heat eFchangers (+ooling 7$6$ 7$6


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Q 7il Devel Tank

Q 7il *reservation "ystems8 +onservators (gas sealed, Bellowsmembrane sealed

T&pe#

The transformers are of two general types distinguished from each other by the manner in

which the primary and secondary coils are placed around the laminated steel core. They are

a. "hell type

b. +ore type.

Fig .2: practical transformer

CHAPTER 0

CONCLUSION

6fter the study % am able to understand the !eneratin! station alon! with &arious ion of

power in a power plant and e'uipments used in switchyard their function , maintenance (

testin! . This study definitely will help in my professional life.

The motive and ob4ective behind the pro4ect would remain unfulfilled without the

mentioning of those who constantly provided us help and support during the course of the

pro4ect. e would sincerely like to thank the professionals of $T*+ who constantly

provided us help and eFtended their hand whenever we needed.

2'


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APPENDI@

SHARE HOLDING PATTERN OF NTPC SINGRAULI:

FUTURE CAPACITY ADDITIONS

$T*+ has formulated a long term +orporate *lan to become a ',-@,111 0 company upto

-12-. !n line with the +orporate *lan, the capacity addition under implementation presently8

S.No. P+oe$" S"!"e C!p!$%"&

*W/

+oal

'. Bongaigaon 6ssam 91

-. Barh=! Bihar '/@1

2. Barh=!! Bihar '2-1

). Dara=! +hhattisgarh ':11

9. Judgi=! Jarnataka -)11

:. indhyachal= 0adhya *radesh 911

. #adarwara=! 0adhya *radesh ':11

@. 0ouda=!! 0aharashtra '2-1

2-


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/. "olapur 0aharashtra '2-1

'1. 3ihand=!!! ttar *radesh 911

''. $abinagar, B3B+D Bihar '111

'-. 0u>affarpur EFp., JB$D Bihar 2/1

'2. $abinagar, $*#+*D Bihar '/@1

'). allur=!!, $TE+D Tamil $adu 911'9. 0e4a, 0$*D ttar *radesh '2-1

To"! 1070-

Hydro

'. Joldam HE** ( ) F -11 Himachal *radesh @11

-. Tapovan ishnugad HE** () F '21 ttarakhand 9-1

2. "ingrauli + Gischarge("mall Hydro ttar *radesh @

). Data Tapovan ttarakhand ''

To"! 17

'. 3amagundam *hase=! 6ndhra *radesh '1-. Talcher Janiha 7disha '1

2. nchahar ttar *radesh '1

To"! 21

G+!nd To"! (+oal R Hydro R "olar '---

RE(ERENCES

'. 0anuals and drawings by 7E0.

-. $T*+, *0!= $7!G6 training manuals

2. B.D.Thera4a C 6.J. Thera4a, L6 teFt book of EDE+3!+6D TE+H$7D7#SM

). .$. 0ittle C 6. 0ittal, LGE"!#$ 7< EDE+T3!+6D 06+H!$E"

22


34/34

9. +.D.6GH6 L Electrical *ower "ystemsM.

:. *re=+ommissioning procedures C formats for )11 J sub=station bay

euipments

. 0odern power station practice=volume=b, volume=c

@. *ower plant engg. By *.J $6#+ontrol C instrumentation 5 volume '

/. 7peration and maintenance manual (0T*"= volume -.

'1. Electrical machinery by *.".Bhimbra

''. http8home.frognet.nete4cov4wswan.html

'-. http8www.abc.net.aurnmuseumsawardmuseumsTamworth*owerstation

'2. http8www.lrc.rpi.eduprogram

'). www.photosearch.com

'9. www.emadr'c.blogspot.com

':. www.electriciyfourm.com
http://home.frognet.net/~ejcov/jwswan.htmlhttp://www.abc.net.au/rn/museums/award/museums/TamworthPowerstation/http://www.lrc.rpi.edu/programhttp://www.photosearch.com/http://www.emadr1c.blogspot.com/http://www.electriciyfourm.com/http://home.frognet.net/~ejcov/jwswan.htmlhttp://www.abc.net.au/rn/museums/award/museums/TamworthPowerstation/http://www.lrc.rpi.edu/programhttp://www.photosearch.com/http://www.emadr1c.blogspot.com/http://www.electriciyfourm.com/

NTPC Seminar Report by Harsh Shekhar

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Transcript of NTPC Seminar Report by Harsh Shekhar