obra thermal power plant ppt

PresentationOn

CO-OP Training2015-2016

Submitted by

ASHISH KUMAR SINGH136160

Diploma in Electrical Engg.(III YEAR)

INTRODUCTION• In Obra power Station electricity is generated.• The project was proposed by Uttar Pradesh Rajya

Vidyute Utapadan Nigm Ltd. (Uttar Pradesh) India in July 1967.

• At first two units were installed each producing 50 MW of power.

• The first estimated cost was Rs. 143 Crores.

STAGE I

5 X 50 MW STAGE Il

3X100 MWSTAGE Ill

3X200 MW

STAGE IV

2X200 MW

Coal Storage

Coal Handling Plant

Ash Storage

Ash Handling Plant Boiler Super

Heater

Economizer

Air Pre-heater

Turbine

Chimney

Feed Water Heater

Deaerator

Cooling Tower

Make up Water

Air

Coal

Ash

COAL

ASH

STEAM

WATER

FLUE GASES

Alternator

Condenser

Exciter

COAL HANDLING PLANT

WAGON TRIPLER Wagons From the coal yard come to the tippler and are emptied here.

The process is performed by a Slip ring motor of rating 55KW, 415V, 1480 RPM.

This motor turns the wagon by 150 degree and coal falls directly on the conveyor through vibrators

WATER TREATMENT PLANTWATER TREATMENT PLANT

BOILERBOILERTemperature of SuperHeated Steam – 540’cPressure-144 kg/cm*cm

• Boilers are used for electrical power generation, heat energy is released from the combustion of fuels.

• BHEL make direct fired natural circulation balanced draft tube boilers are used here, having capacity of 375 tones/hour and efficiency of 86.6%.

STEAM TURBINESTEAM TURBINE

Steam Flow

HP Turbine

IP Turbine

LP Turbine

It convert heat energy of steam into mechanical energy and drive generator.

It uses the principle the steam when issuing from a small opening attains a high velocity.

DETAILS OF BRIEFLY TURBINE

BASIC WORKING OF THERMAL POWER PLANT

TRANSFORMER Transformer is a static device which

is used to change the voltage level keeping the power and frequency same.

In the whole plant there are about 83 transformer installed at various places to operate the auxiliaries.

Main transformers, which are necessary: 1. To step up the generated voltage. 2. To supply power to the auxiliaries from the generator. 3. To start the plant by taking the supply from the grid

Fly ash (80%).Used for making bricks.Cement.

Bottom ash (20%)Used to improve fertility.Roads.

BOILER –FLY ASH PRODUCESDE.S.P. – BOTTOM ASH

(in small amount)

Two 220 KV bus bars have been provided in switch yard and are inter-connected through a bus coupler

Two step down transformer each feeding 6.6 KV system

12 Feeders