SUNIL RATHORE

8/4/2019 SUNIL RATHORE

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A

Practical Training

seminar on

KOTA SUPER THERMAL POWER STATIONSubmitted to

VEDANT COLLEGE OF ENGINEERING & TECHNOLOGY

BUNDI, RAJASTHAN

SESSION :2011-2012

SUBMITTED BY: GUIDED BY:

SUNIL KUMAR RATHORE MR. RAJAN SINGH TANWAR

(B.TECH - VII SEMESTER) (LECT. ELECTRICAL DEPT.)

FINAL YEAR

DEPT. ELECTRICAL & ELECTRONICS ENGG.


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KOTA SUPER THERMAL

POWER STATION


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In Kota Super Thermal PowerIn Kota Super Thermal PowerStation electricity is generated.Station electricity is generated.

The project was proposed byThe project was proposed byCentral Electric Authority ofCentral Electric Authority of

India in April, 1973.India in April, 1973. The project was revised inThe project was revised in

1975 and approved in Sep.,1975 and approved in Sep.,1976.1976.

At first two units were installedAt first two units were installed

each producing 110 MW ofeach producing 110 MW ofpower.power.

The first estimated cost wasThe first estimated cost wasRs. 143Rs. 143 CroresCrores..


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TheThe KOTAKOTA SUPERSUPER THERMELTHERMEL POWERPOWER STATIONSTATION isis ideallyideallylocatedlocated onon thethe leftleft bankbank ofof ChambalChambal RiverRiver atat thethe upstreamupstream ofof KOTAKOTABARRAGEBARRAGE

TotalTotal GenerationGeneration CapacityCapacity 12401240 MWMW

Stage IStage I (Two units each of 110 MW)(Two units each of 110 MW)

Stage IIStage II (Two units each of 210 MW)(Two units each of 210 MW) Stage IIIStage III (One unit of 210 MW)(One unit of 210 MW)

Stage IVStage IV (One unit of 195 MW)(One unit of 195 MW)

Stage VStage V (One unit of 195 MW)(One unit of 195 MW)

INTRODUCTION


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SITE SELECTIONSITE SELECTION

Availability of waterAvailability of water

Nearness to the load centerNearness to the load center

Distance from populated areaDistance from populated areaAvailability of coalAvailability of coal

Land requirementLand requirement

Transportation facilityTransportation facility


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CONTENTSCONTENTS

AlternatorAlternator

Coal handling plantCoal handling plant

BoilerBoiler

Ash handling plantAsh handling plant

TurbineTurbine

Switch yardSwitch yard

CondenserCondenser Cooling towerCooling tower

DM PlantDM Plant


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COAL

HAND

ASH

STOR

CONDENSER

C

H

ILAYOUT


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..

CIRCUIT

%5($.(5


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INTRODUCATIONINTRODUCATION

Circuit breaker is basically a mechanical deviceCircuit breaker is basically a mechanical device

used to make or break an electrical circuit underused to make or break an electrical circuit under

normal & abnormal condition.normal & abnormal condition.

A circuit breaker is switched on or off underA circuit breaker is switched on or off under

load conditions an arc is produced in betweenload conditions an arc is produced in between

the breaker contacts.the breaker contacts.

This arc produced between the breaker contactsThis arc produced between the breaker contacts

is quenching by some suitable medium.is quenching by some suitable medium.


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It must be capable of carrying F.LIt must be capable of carrying F.Lcurrents for long period of time.currents for long period of time.

It must successfully & rapidlyIt must successfully & rapidlyinterrupt the heavy currents due tointerrupt the heavy currents due tofaultsfaults

With its contacts open, the gap mustWith its contacts open, the gap mustwithstand the circuit voltage.withstand the circuit voltage.


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ARC PHENOMENAARC PHENOMENA

An arc isAn arc is strickstrick whenwhencontacts arecontacts are seperatedseperated..The currents is there ableThe currents is there ablethe continue. Thus thethe continue. Thus the

main duty of a circuitmain duty of a circuitbreaker is to distinguishbreaker is to distinguishthe arc with in thethe arc with in theshortest possible time.shortest possible time.

The arc provides the lowThe arc provides the lowresistance path to theresistance path to thecurrent in the circuitcurrent in the circuitremains uninterrupted.remains uninterrupted.


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Air blast circuit breakerAir blast circuit breaker

Oil circuit breakerOil circuit breakerSulpur hexafluoride circuitSulpur hexafluoride circuitbreakerbreaker

Vacuum circuit breakerVacuum circuit breaker


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OIL CIRCUIT BREAKEROIL CIRCUIT BREAKER

1.Oldest,simple,reliable type1.Oldest,simple,reliable type

2.contects,separate within2.contects,separate within

insulating oil.insulating oil.

3.Oil dissociates into hydrogen3.Oil dissociates into hydrogen

4.Hydrogen cools the arc.4.Hydrogen cools the arc.

5.Arc extinguished.5.Arc extinguished.


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TYPES OF OILTYPES OF OIL

CIRCUIT BREAKERCIRCUIT BREAKER

BULK OILBULK OILLOW OILLOW OIL


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BULK OIL CIRCUITBULK OIL CIRCUIT

BREAKERBREAKER

Large quantity of oilLarge quantity of oil

Oil tank is at groundOil tank is at ground

potentialpotential


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LOW OIL CIRCUITLOW OIL CIRCUIT

BREAKERBREAKER

Minimum amount of oilMinimum amount of oil

Oil tank is insulated fromOil tank is insulated from

groundground


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AIR BLAST CIRCUIT BREAKERAIR BLAST CIRCUIT BREAKER

Air is used as arc quenchingAir is used as arc quenching

mediummedium

Air is compressed atAir is compressed atpressure of 20pressure of 20--30 kg/cm30 kg/cm22

It has high speed operationIt has high speed operation

Suitable for all EHV applicationSuitable for all EHV application


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VUCUUM CIRCUIT BREAKERVUCUUM CIRCUIT BREAKER

Less bulky & cheaperLess bulky & cheaper

Greater service lifeGreater service life

Almost no maintenanceAlmost no maintenance

Suitable for 11 to 33 KVSuitable for 11 to 33 KV


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SF6 CIRCUIT BREAKERSF6 CIRCUIT BREAKER

SF6 as quenching mediumSF6 as quenching medium

Excellent dielectricExcellent dielectric

High rate of recovery dielectric strengthHigh rate of recovery dielectric strength

Used for 3.3 to 760VUsed for 3.3 to 760V


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FUNCTION OF BREAKERFUNCTION OF BREAKER

OPERATING MECHANISMSOPERATING MECHANISMS

1.To close breaker contacts1.To close breaker contacts

2.To hold the breaker contacts together2.To hold the breaker contacts together

3.To open the breaker contects without delay3.To open the breaker contects without delay


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FAULT CLEARING BY CIRCUITFAULT CLEARING BY CIRCUIT

BREAKERBREAKER

Fault occurs and since the fault impedance being low,Fault occurs and since the fault impedance being low,

the current increases & the relay gets actuated.the current increases & the relay gets actuated.

Relay contacts close, the trip circuit of the C.B. closesRelay contacts close, the trip circuit of the C.B. closes

and the trip coil is energized.and the trip coil is energized.

The opening mechanism starts and the circuit breakerThe opening mechanism starts and the circuit breaker

contacts opens.contacts opens.

As the contacts separates an arc is produced betweenAs the contacts separates an arc is produced betweenthem, which is extinguished by some medium. Thethem, which is extinguished by some medium. The

current reach to zero value and the arc is extinguished.current reach to zero value and the arc is extinguished.


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no touching live partsno touching live parts

no cost associated with resetting unlike cost ofno cost associated with resetting unlike cost of

replacement fusesreplacement fuses

Circuit breakers come in a broad range ofCircuit breakers come in a broad range ofratings, from a few amps to thousands.ratings, from a few amps to thousands.


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when it trips you loose all powerwhen it trips you loose all power

Complex designComplex designmore expensive than fused switchesmore expensive than fused switches


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