Summer Training in DVC DSTPS Andal, Durgapur Electrical Engineering Kalyani Govt. Engineering College

1. Training report on
DURGAPUR STEEL THEMAL POWER STATION,
DAMODAR VALLEY CORPORATION, ANDAL
Kalyani Government Engineering College
Suvodip Som
Nilanjan Konar
Rohan Koley
Jeet Saha
Rudraneel Das
Rounak Chakraborty
Souradip Santra
Arnab Chhatait

2. ACKNOWLEDGEMENT
We would like to express our profound gratitude to all those who have
given us this opportunity to undergo this summer vocational training.
We are extremely gratified to Mr Sumeet Kumar, Executive Engineer
(Electrical) and to Mr Saifuddin Shaikh, Assistant Engineer
(Electrical). They have been the sole motivator and a source of
inspiration for us to carry out the necessary proceedings for the
training. We are also highly obliged to all the respected faculty
members, staffs and the co-trainees for their constant help and
encouragement.
We are also grateful to our H.O.D, Prof. (Dr) Shib Shankar Saha of
Kalyani Government Engineering College, Electrical Engineering
Department for giving us the permission to undergo this industrial
training.
Last but not the least, a big thank you to DVC, DSTPS, Andal for
giving us this esteemed privilege to acquire knowledge about the
industrial methodology of work.
We will really cherish this experience of industrial training throughout
our life and hope that this will count a lot more in our future career.

3. CONTENTS
• Introduction to Damodar Valley Corporation
• About Durgapur Steel Thermal Power Station
• Coal Handling Plant
• Inside Power House
• Water Treatment Plant
• Ash Handling Plant
• Electrostatic Precipitator
• Switch Yard
• Conclusion

4. Introduction to Damodar Valley Corporation
The Damodar Valley Corporation (DVC) is an Indian governmental
organization which operates in the Damodar River area of West Bengal
and Jharkhand states of India. The corporation operates both thermal
power stations and hydel power stations under the Ministry of Power, Govt
of India. DVC is headquartered in the city of Kolkata, West Bengal, India.
DVC emerged as a culmination of attempts made over a whole century to
control the wild and erratic Damodar River. The valley has been ravaged
frequently by floods at varying intensities. Serious floods occurred in 1730,
1823, 1848, 1856, 1882, 1898, 1901, 1916, 1923, 1935 & 1943. The river
spans over an area of 25,235 sq. km covering the states of Bihar (now
Jharkhand) & West Bengal. The catastrophe caused by the 1943 flood, led
to serious public indignation against the Government. As a result, the
Government of Bengal appointed a board of Enquiry titled "Damodar Flood
Enquiry Committee"with the Maharaja of Burdwan and the noted physicist
Dr. Meghnad Saha as members for suggesting remedial measures.
The Damodar Flood Enquiry Committee suggested the creation of an
authority similar to the Tennessee Valley Authority in the USA and
recommended the construction of dams and storage reservoirs at the sites
with a total capacity of 1.5 million acre-ft. (1.850 million cu. M) and
highlighted the possibilities of multipurpose development in the valley area.
The Government of India then commissioned the ‘Central Technical Power
Board’ to study the proposal and appointed Mr. W L Voorduin, a senior
engineer of the TVA to study the problem at the Damodar and to make his
recommendation for comprehensive development of the valley.
Accordingly, in August 1944 Mr. Voorduin submitted his ‘Preliminary
Memorandum on the unified Development of the Damodar River.’

5. Mr. Voorduin's "Preliminary Memorandum" suggested a multipurpose
development plan designed for achieving flood control, irrigation, power
generation and navigation in the Damodar Valley. Four consultants
appointed by the Government of India examined it. They also approved the
main technical features of Voorduin's scheme and recommended early
initiation of construction beginning with Tilaiya to be followed by Maithon.
By April 1947, full agreement was practically reached between the three
Governments of Central, West Bengal and Bihar on the implementation of
the scheme and in March 1948, the Damodar Valley Corporation Act (Act
No. XIV of 1948) was passed by the Central Legislature, requiring the
three Governments, The Central Government and the State Governments
of West Bengal and Bihar to participate jointly for the purpose of building
the Damodar Valley Corporation. The Corporation came into existence on
7 July 1948 as the first multipurpose river valley project of independent
India.
DVC plants
Power Plant name State Capacity in MW
Mejia Thermal Power Station West Bengal 2340
Raghunathpur Thermal Power Station West Bengal 1200
Durgapur Steel Thermal Power Station West Bengal 1000
Durgapur Thermal Power Station West Bengal 210
Koderma Thermal Power Station Jharkhand 1000
Bokaro Thermal Power Station A Jharkhand 500
Bokaro Thermal Power Station B Jharkhand 210
Chandrapura Thermal Power Station Jharkhand 630
Maithon Hydel Power Station West Bengal 63.2
Panchet Hydel Power Station Jharkhand 80
Tilaiya Hydel Power Station Jharkhand 4

6. Durgapur Steel Thermal Power Station
Durgapur Steel Thermal Power Station is a coal-based thermal power plant
located near Durgapur city in Bardhaman district in the Indian state of West
Bengal. The power plant is operated by the Damodar Valley Corporation.
It has an installed capacity of 1,000 megawatts.
Features of a Thermal Power Plant

7. DIAGRAM OF A TYPICAL COAL BASED POWER PLANT
PRINCIPAL (Modified Rankine Cycle)

8. Components of Coal Fired Thermal Power
Station:
• Boiler- To generate steam at high pressure and temperature
• Turbine- Expands the steam to low pressure and temperature
producing work
• Condenser- Cools the steam to liquid so that it can be fed back to
the boiler
• Generator- Driven by the steam turbine to generate power
• Feed Heaters- To preheat the water before it enters the boiler
• Preheaters- Reheats the steam after it is partially expanded

9. COAL HANDLING PROCESS
The process involves
• Unloading Process- This process involves unloading of coal
from BOBR(Bogie Open Bottom Discharge) and Box type
wagons. Unloading of BOBR wagons done in Track Hopper and
for BOX types wagons unloading of coal is achieved by Wagon
Tippler.
• Feeding Process- This process involves continuous or control
flow of coal to meet the requirement of coal in bunker. Various
types of feeder are used for this process in coal handling plant
depending upon the capacity of conveyor belt.
• Screening Process- This process involves screening of fine,
coarse and wet coal. To achieve these process below listed
screens are used in coal handling plant.
1) Vibrating Screen 2) Roller Screen
• Crushing Process- This process involves crushing the coal to a
size as per requirement of thermal power stations prior to
pulverization.
• Stacking and Reclaiming Process- In stacking process crushed
coal are stored in a yard. This process is generally used when
boiler bunker level is full.
In reclaiming process the stored coal are reclaimed for
sending to boiler bunkers. This process is used when boiler
bunker level is low.

10. • Bunkering Process- This process involves maintaining the level
of boiler bunkers. From the conveyor belt the coal is
discharged into bunkers with the help of tripper trolley.
Coal Mill (Pulveriser)
• Supplies pulverized coal as per steam generation requirement
• Facilitates combustion by pre combustiondrying up
• Separates incombustible

11. Power House
Boiler

12. Steam is generated from DM water by heat addition to DM water at
constant pressure & temperature.
Boiler description
• Top supported, fusion welded
• Vertical water-tube boiler
• Controlled Circulation
• 4-corner tilting tangential firing
Boiler Mountings
• Pressure Gauges – For measuring pressures at various points
• Valves- For safety, and to maintain unidirectional flow
• Water Level Indicator- For optimum running of boiler
• LRSB (Long Retractable Soot Blower)- For cleaning soot from
boiler’s inner surfaces
• Tapping and Manholes- Maintenance
Boiler Accessories
• Air Preheater- Air is pre-heated by flue gases to ensure
complete combustion of even low-grade fuel, like Lignite.
• Economizer- Feed-water is heated by the outgoing flue gases
before entering boiler drum.
• Superheaters- Steam is heated to higher temperature to ensure
dryness fraction remains above 0.8
• Reheaters- Steam is reheated between HPT and IPT, and again
between IPT and LPT

13. Turbine
3 turbines : HP, IP, and LP
• High Pressure Turbine (HPT) – 17 stages
• Intermediate Pressure Turbine (IPT) – 12 x 2 stages
• Low Pressure Turbine (LPT) – 6x2 stages
• 3000 RPM
• Heat Rate : 1944.4 kcal/kWh
Generator and Exciter
Generates electrical power by the interaction of the
rotating magnetic fields of the stator and rotor
• kW: 500000
• Speed: 3000 RPM
• kVA: 588000
• Frequency: 50 Hz
• P.F.: 0.85 Lag Coolant: H2 and H2O
• Made at BHEL, Haridwar
• Brushless excitation system

14. WATER TREATMENT PLANT
Source of Raw Water : Damodar River
Water Requirement:
To provide make-up water to the water/steam cycle. To provide make-up water to the water/steam cycle.
For cooling of the steam for re-use as condensate. To provide make-up water to the water/steam cycle.
For general domestic use. To provide make-up water to the water/steam cycle.

15. ASH HANDLING PLANT
Ash is categorised into :▪ Ash is categorised into :
– Bottom Ash
collected at the bottom of the boiler▪ Ash is categorised into :
– Fly Ash
collected at the Electro-Static Precipitator▪ Ash is categorised into :
It is transported in the form of slurry▪ Ash is categorised into :
Ash is either given away to cement▪ Ash is categorised into :
factories, or is stored in Ash Silos

17. ELECTROSTATIC PRECIPITATOR
An electrostatic precipitator (ESP) is a filtration device that
removes fine particles, like dust and smoke, from a flowing gas
using the force of an induced electrostatic charge minimally
impeding the flow of gases through the unit.
There are mainly 3 main parts to an ESP:
1.Emitting Set (Negative electrodes set) - Which get negatively
charged from TR set. It is isolated from remaining ESP by using
insulators of various types at intersection points. The electrodes
upon charged generate an electric field around the electrodes,
called as “Corona” effect.
2.Collecting Set (Positive Electrodes Set) - This is mainly to
collect the desired particles. Unlike popular notion, there is no
“positive” charge in it, this is simply attached to ground to have
zero charge. Since zero is higher than negative, it acts as a
positive electrode. These are a set of flat plates placed in front
of Emitting electrodes.
3.Rapping Mechanism - The collected particles which cling to
Emitting or Collecting set are brought down by “rapping”,
periodical forceful removal of particles by hammering/vibrating
the body. Usually rappers vary from make to size in ESP’s.

19. SWITCHYARD
The switchyard is a junction connecting the Transmission &
Distribution system to the power plant.
The function of Switchyards is to deliver the generated power
from power plant at desired voltage level to the nearest grid.
Components of Switchyard
• Incoming Lines.
• Outgoing lines
• Galvanized steel structures for towers, gantries and
equipment support.
• Bus bar
• Insulators
• Lightning Arrestor
• Circuit Breaker
• Isolator
• Earthing Switch
• Current Transformer
• Voltage transformer
• Power transformer
• Shunt reactor/Capacitor
• Power Cables
• Control Cables for protection and control.
• Control and Protection Panel.
• PLCC Equipment.
• LV AC switchgear.
• DC Battery and Charging Equipment.
• Station Earthing Systems.
• Station Lighting System.
• Fire Fighting System and Air Conditioning System.
Busbars

20. Busbar is used to interconnect the loads and sources of electrical
power. It connects the incoming and outgoing transmission lines. It
also connects generator and main transformer in power plant
Busbars are either flexible or rigid. Flexible busbars are made of
ACSR conductors and are supported by disc insulator strings on both
sides with the gantries. Rigid busbars are made up of Aluminum tubes
and are supported on post insulators
Busbar Layout
Single Busbar System
Main and Transfer Bus system
Double Main Busbar system
Double Main and Transfer Bus system
One and half breaker system
In DSTPS Andal, we use One and half type system

21. CONCLUSION
The practical experience I have gathered during the overview
training of this thermal power plant in two weeks will be very
useful as a stepping stone in building bright professional career
in future life.
It gave me large spectrum to utilize the theoretical knowledge▪ Ash is categorised into :
and to put it into practice.
The trouble shooting activities in operation and decision▪ Ash is categorised into :
making in case of crisis made me more confident to work in the
industrial atmosphere.
Thank you