INTRODUCTION CONVERSION OF THERMAL POWER STATION WORKING CYCLES PART OF THERMAL PLANT SWITCHYARD

1. SUBMMITED
Amir Mohammad
Email.
amir225692@gmail.com

2.  INTRODUCTION
 CONVERSION OF THERMAL POWER STATION
 WORKING
 CYCLES
 PART OF THERMAL PLANT
 SWITCHYARD

3.  This power plant was installed in Sikka in
Jamnagar district in 1984.
 Initially it has only one unit had installed which
had capacity of only 120MW.
 So now total capacity of power plant become 240
MW of electricity generation.
 In Sikka these units are designed and monitoring
has been done by GSVCL engineers, TATA
consulting engineers and BHEL engineers
 Sikka thermal power plant has been situated at the
coast of Arabian Sea, so there is lot of sea water is
available for cooling purpose

4.  In thermal power plant Sikka main fuel used is
bituminous coal which has been exported from
other states like Bihar and Madhya Pradesh.
 This coal has been taken from both by truck or by
wagons.
 In future another 120MW plants will be installed for
improving plant capacity.
 So the future of the Sikka power station has been
quite bright.

6.  In thermal power plants, chemical energy of coal is
converted into heat energy from burning coal in
boiler. The heat water makes steam.
 The steam turns a turbine, creating mechanical
energy to run generator , Magnets turns inside the
generator, where mechanical energy is converted
into electrical energy.

7.  An electrical power station which utilizes thermal energy (
from coal) as a part of its electrical production system is
known as thermal power station.
 The schematic diagram of thermal power plant can be divided
into following steps for simplicity.
step-1 coal and ash handling arrangement
step-2 air and flue gages arrangement
step-3 feed water and steam generation arrangement
step-4 electricity transmission arrangements
step-5 cooling arrangement

9.  BOILER
 SUPER-HEATER
 STEAM TURBINE
 CONDENSER
 ELECTROSTATIC PRESIPITATOR
 ALTERNATOR
PARTS OF THERMAL PLANTS

10.  A Boiler is closed vessel in which water is converted
into steam by utilizing the heat of coal combustion.
 The boiler is designed to meet the nominal
requirement of 120MW generator set.
 The unit is designed for the maximum continuous
rating of 383 T/hr of steam flow at pressure of 135
kg/cm2 and steam temperature of 540c.
 Steam boiler classified into two type
1. water tube boiler
2. fire tube boiler.

11. WATER TUBE BOILER

12.  The turbine is horizontal compounded,
reheat, impulsive type machine, with
continuous maximum economical rating of
120 MW at the generator terminal at a speed
of 3000 rpm. The design inlet conditions are
127.6 kg/cm2 and 538c for main steam .
STEAM TURBINE

13. ELECTROSTATIC PRESIPITATOR

14.  1. smoke particles pick up a negative charge.
 2. smoke particles are attracted to collecting
plates.
 3. collecting plates are knocked to remove the
smoke particles.
 An electrostatic precipitator is an electrical device
which is use for removing dangerous smoke
particles ( fly ash ) from combustion gases prior to
release from a power plant’s stack.
 A high voltage applied to the electrodes a strong
electrical field is created b/w the electrodes and
flue gases is ionised.

15.  When steam exhaust from the turbine it exhaust in
the condenser, which is exhausted with high
temperature and low pressure.
 Condenser is made up of copper tubes which are in
large sizes. Generally two types of condenser are
used one way and two way types of condensers.
 In sikka thermal power station two type circulating
tubes are used. When water passes through the
tubes and steam of the tube. Cooling water passes
through the tubes. When this steam contacted with
the water it becomes cooled.
CONDENSER

16.  One of the important unit and part of the thermal
power plant is switchyard. In Sikka thermal power
plant there are two generating units of 120 MW.
 In this power station two switchyard one of 132 KV
and another one is 66 KV.
SWITCHYARD

17. LINE DIAGRAM OF SWITCHYARD :

18. Thank you.