Prepared by :Prashu PrakashBtech(EEE) 4th yearA2324612039

BRIEF PROFILE OF THE COMPANY Under IPGCL i.e. Indraprastha Power Generation

Company Limited,3 Power Stations are in operation.They are as follows :1)I.P STATION2)RAJGHAT POWER HOUSE3)GAS TURBINE POWER STATION (GTPS)

Under PPCL i.e. Pragati Power Cooperation Limited, one Power Station is in operation and it is:PRAGATI POWER STATION

STATIONS I.P STATION RAJGHAT POWER STATION

GTPS PRAGATI POWER STATION

Station Capacity (MW)

247.5 135 282 330

Units 3*62.5 (GT) + 60 (ST)

2*67.5 (GT) 6*30 (GT) + 3*34 (WHRU)

2*104 (GT) + 1*122 (WHRU)

Year of Commissioning

1967-71 1989-90 1986 & 1996 2002-2003

Coal Field/Gas

NCL,BINA NCL,BINA GAIL HBJ Pipeline

GAIL HBJ Pipeline

Water Sources

River Yamuna River Yamuna River Yamuna Treated water from Sen Nursing Home & Delhi Gate Sewage Treatment Plants

Beneficiary Areas

VIP-South & Central Delhi

Central & North Delhi

NDMC-VIP,DMRC

NDMC,South Delhi

MISSION OF THE COMPANY To make Delhi-Power Surplus To maximize generation from available

capacity To plan and implement new generation

capacity in Delhi To set ever so high standards of

environment Protection To develop competent human resources for

managing the company with good standards

INTRODUCTION Works on Rankine Cycle Steam produced in boiler (usually by burning coal) is

expanded in the prime mover (ie; steam turbine) Condensed steam is fed back to boiler again The steam turbine drives the alternator produces

electricity Steam power plants contribute about 65% of total

electrical energy generated in India

RANKINE CYCLE

LAYOUT OF THERMAL POWER PLANTThe schematic arrangement of a modern

steam power station can be divided into the following stages:

Coal and ash handling plant Steam generating plant Steam turbine Alternator Feed water Cooling arrangement

COAL AND ASH HANDLING PLANT Coal is transported to power station by rail

or road and stored in coal storage plant and then pulverised

Pulverised coal is fed to fed to the boiler by belt conveyers

Coal gets burned in the boiler and ash produced is removed to the ash handling plant and then delivered to ash storage plant for disposal

A 100MW station operating at 50% LF may burn about 20000tons of coal per month and produce 3000 tons of ash

Coal handling plant

• Wagon unloading system• Crushing system• Conveying system

Coal handling plant section

ASH HANDLING PLANT

The Ash from the boiler is collected in two forms:1. Bottom Ash(Slurry):It’s a waste which is dumped

into a Ash Pond2. Fly ash: Fly ash is separated from Flue Gases in

ESP(Electro static Precipitator).

Fly Ash & Flue Gases Economizer ESP

Bottom ash(wet ash)

Ash Pond

Boiler

Cylo

Chimney

Fly ash

Flue Gases

Cement Factory

STEAM GENERATING PLANTThe steam generating plant consists of a

boiler for the production of steam and other auxiliary equipment for the utilization of flue gases

1) Boiler: The heat of combustion in the boiler is utilized to convert water into steam at high temperature and pressure

Boiler

2) Superheater: The steam produced in boiler is wet and is passed through a superheater where it is dried and superheated. Increases efficiency

3) Economiser: It’s essentially a feed water heater & derives heat from the flue gases

STEAM GENERATING PLANT4) Air Preheater: Increases the

temperature of the air supplied for coal burning by deriving heat from flue gases. Air is drawn from the atmosphere by a forced drought fan and is passed through air preheater before supplying to the boiler furnace.

STEAM TURBINE Dry and superheated steam from

superheater is fed to the steam turbine. The heat energy of steam when passing

over the blades of turbine is converted into mechanical energy.

After giving energy to the turbine, the steam is exhausted to the condenser which condenses the exhausted steam by means of cold water circulation

TURBINE – FULL VIEW

ALTERNATOR Steam turbine is coupled to an

alternator which converts the mechanical energy to electrical energy

The electrical output of the alternator is delivered to the bus bars through transformer, circuit breakers and isolators.

FEED WATER The condensate from the condenser is

used as feed water to the boiler. The water that may be lost in the cycle

is made up from the external source The feed water on its way to boiler gets

heated up by water heaters and economiser.

This helps to improve the overall efficiency of the plant

Raw Water

Purified DM water

For cooling purpos

eSteam

Condenser

Water in a Power Plant is used for1.Production of Steam- for rotating turbine.2.Cooling Purpose- For cooling of various equipment

3% of water is wasted during this process. Appx 4 cubic mt water is lost /day/MW

COOLING ARRANGEMENT Condenser condenses the steam

exhausted from the turbine Water is drawn from natural sources like

river, lake, canals… Circulating water takes up the heat and

itself gets heated up This hot water can be discharged away

or used again by using a cooling tower

MERITS & DEMERITS Merits: Requires less space than hydro power plant Initial cost is less Cheaper fuels like coals and water Cost of generation is less

Demerits: Temp. of combustion chamber is too high, which results

in shorter life time. Thermal plant has low efficiency Running cost is higher It pollutes the atmosphere

REFERENCES Links referred :

http://www.hrsgdesign.com/design0.htmhttp://ipgcl-ppcl.gov.in/

http://www.osha.gov/SLTC/etools/electric_power/illustrated_glossary/substation.html#Equipment

Books: Principles of Power System- V.K. Mehta A Course in Power Systems- J.B. Gupta