BY - RANJAN KUMAR

1. (AIET/DOEE/2017-18/SP/I)
CERTIFICATE
This is to certify that the Mr. RANJAN KUMAR of 3rdyear, ARYA
INSTITUTE OF ENGINEERING AND TECHNOLOGY,
JAIPUR (Electrical engineering) has undergone Practical Training
from 1/06/2017 to 30/06/2017 in this organization. During this
period he has undergone training for the general operations of
various equipment’s installed in Coal Handling System , Boiler
System , Turbine System , Cooling Tower System , Generator system
, Transformer System , Switchyard , Control room, at , Super
Thermal Power Station (NTPC) Kahalgaon (Bihar).
Mr. Vibhu Tyagi Mr. Vibhu Tyagi
(PTS GUIDE) (PTS INCHARGE)
Assistant Professor Assistant Professor
Dept. of Electrical Engineering Dept. Of Electrical Engineering
Mr. Deepak Sharma
(H.O.D)
Associate Professor
Dept. Of Electrical Engineering
DEPARTMENT OF ELECTRICAL ENGINEERING
ARYA INSTITUTE OF ENGINEERING & TECHNOLOGY
SP-40, RIICO INDUSTRIAL AREA, JAIPUR (RAJASTHAN)-302028

2. (AIET/DOEE/2017-18/SP/II)

3. (AIET/DOEE/2017-18/SP/III)
ACKNOWLEDGEMENT
With profound respect and gratitude, I take the opportunity to convey my
thanks to complete the training here. I do extend my heartfelt thanks to Prof.
R.P Yadav (TBMD, Head), Mr. Abhay Kr. (Sr. Manager, BMD), Mr. Shazad
Alam (Sr. Engineer Switch yard dept.) & Mr. S.P Dubey (DM Plant Head) for
providing me this opportunity to be a part of this esteemed organization. I am
extremely grateful to all the technical staff of NTPC Kahalgaon for their co-
operation and guidance that helped me a lot during the course of training. I
have learnt a lot working under them and I will always be indebted ofthem for
this value addition in me. We are thanks to other staff member which are
guided me. Finally I would like to saythis summer training has been a valuable
part in my life. At last but not least I am thankful to the all the staff member of
“ARYA INSTITUTE OF ENGINEERING AND TECHNOLOGY”
KUKAS, JAIPUR, department of Electrical Engineering.
RANJAN KUMAR
Electrical Engineering
14EAIEE079
B.Tech 4th
Yr. VII SEM

4. (AIET/DOEE/2017-18/SP/IV)
ABSTRACT
To fulfil the power demands ofthe country, it is required to set up new project,
time to time so that demand and generation gap may be narrowed but most
important is to full utilization of existing capacity .This may be possible only
by increasing the reliability, availability, maintainability of power generation
units and by operating the units at its full capacity.
In Kahalgaon Super Thermal Power Plant varios equipment are installed like
three type of turbine (HPT, IPT, LPT), Turbogenerator, Main Exciter,Various
type of transformer and installed switchyard etc. to meet the power demands
of the country, it is required to set up new project, time to time so that demand
and generation gap may be narrowed but most important is to full utilization
of existing capacity .this may be possible only by increasing the reliability,
availability, maintainability of power generation units and by operating the
units at its full capacity.
This vocational training report is concerned with the overall operation of the
plant, water treatment in the plant and thermodynamic cycles used in NTPC,
Kahalgaon, Bihar power station.
This summer training report is concerned with the overall operation of the
plant, water treatment in the plant, Coal handling in the plant, thermodynamic
cycles and Power generation and distribution system in the plant used in Super
Thermal Power Station (NTPC) Kahalgaon (Bihar).

5. (AIET/DOEE/2017-18/SP/V)
List of Figure
Figure No. Figure Description Page No.
1.1 NTPC IN INDIAN POWER SECTOR 03
1.2 Graphical Representation of sources of electricity in India 04
1.3 Graphical Representation of total capacity and generation
of NTPC
04
1.4 Overview of NTPC Kahalgaon (Bihar) 08
1.5 Process of generating coal to electricity 10
1.6 Typical diagram of a coal-fired thermal power station 11
1.7 Flow diagram of bottom ash handling system 14
1.8 Parts of Boiler Auxiliaries 17
1.9 FD Fan and ID Fan 19
2.0 Typical arrangement of ESP 21
2.1 Cooling Tower 21
2.2 High Pressure Turbine 23
2.3 Intermediate Pressure Turbine 23
2.4 Low Pressure Turbine 24
2.6 Overview about all turbine 25
2.7 Stator Frame 26
2.8 Stator Core 27
2.9 Turbogenerator Hydrogen Cooling Circuit 28
3.0 Turbogenerator 32
3.1 Generator Transformer 37
3.2 Station Transformer 38
3.3 Unit Auxiliary Transformer 39
3.4 Switchyard 41
3.5 Bus-Bar 42
3.6 Lightning Arrester 42
3.7 Wave Trap 43
3.8 Capacitive Voltage Transformer 44

6. (AIET/DOEE/2017-18/SP/VI)
3.9 Current Transformer 44
4.0 Potential Transformer 45
4.3 Relay 46
4.4 Air Blast Circuit Breaker 48
4.5 SF6Circuit Breaker 49
4.6 Isolator 50
4.7 Circuit Isolator 51
4.8
4.9
5.0
C&I department
Charging of battery
Discharging of battery
53
58
58

7. (AIET/DOEE/2017-18/SP/VII)
List of Table
Table No. Table Description Page No.
1.1 Classification of plant and its capacity 5
1.2 Regional Spread of Generating Facilities 5
1.3
1.4
Project profile of different state
Element of a coal fired thermal power plant
7
11
1.5
1.6
1.7
1.8
Rating of Motor used in NTPC Kahalgaon
Specification of ID fan
Specification of FD fan
Specification of primary air fan
12
19
20
20
1.9
2.0
2.1
Turbogenerator Rating for stage-1
Turbogenerator Rating for stage-2
Specification excitation system of stage-1
30
31
33

8. (AIET/DOEE/2017-18/SP/VIII)
List of Symbols
SerialNo. Symbols Name Symbols
1. Transformer
2. Step-Up transformer
3. Step-Down transformer
4. Generator
5. Motor
6. Voltmeter
7. Ammeter
8. Battery
9. DC Supply Source
10. AC Supply Source

9. (AIET/DOEE/2017-18/SP/IX)
LIST OF ABBREVIATION
Units Abbreviation
A Ampere
V Voltage
AC Alternating Current
CB Circuit Breaker
CT Current Transformer
PT Potential Transformer
CVT Capacitive Voltage Transformer
LPT Low Pressure Turbine
IPT Intermediate Pressure Turbine
HPT High Pressure Turbine
CT Cooling Tower
GT Generating Transformer
ST Station Transformer
UAT Unit Auxiliaries Transformer
CHP Coal Handling Plant
AHP Ash Handling Plant
ESP Electrostatic Precipitators
MVA Mega Volt Ampere
P.F. Power Factor
PLCC Power Line Carrier Communication
SF6 Sulphur Hexafluoride Circuit Breaker

10. (AIET/DOEE/2017-18/SP/X)
CONTENTS
S. No. Title Page No.
CERTIFICATE
ACKNOWLEDGEMENT
ABSTRACT
LIST OF FIGURE
LIST OF TABLE
LIST OF SYMBOL
LIST OF ABBREVIATION
CONTENTS
(I-II)
(III)
(IV)
(V-VI)
(VII)
(VIII)
(IX)
(X-XI)
1.
CHAPTER-1
About the company (NTPC) 1-7
2.
CHAPTER-2
About the NTPC Kahalgaon 8-9
3.
CHAPTER-3
CoalBasedPlant
3.1Type of coal
3.2 Process of generating coal to electricity
3.3 Basics of Thermal Power Plant
10
10
10
11
4.
CHAPTER-4
Majorarea in NTPC
4.0 Coal Handling Plant
4.1 Coal Handling Plant layout & Locations of mine
12
12
12
5. Ash Handling Plant
5.1 What is Ash?
5.3 Type of Ash
13
13
13

11. (AIET/DOEE/2017-18/SP/XI)
6.
CHAPTER-5
Boilerand its Auxiliaries
6.1 Boiler
6.2 Types of boilers
6.4 Boiler Auxiliaries (Stage-I & II)
6.5 Arrangement of main part of boiler
15
15
15
17
17
7. Turbine and its Auxiliaries
7.1 Turbine
7.2 Turbine Layout in NTPC
24
24
24
8.
CHAPTER-6
Electric Generator and its auxiliaries
8.1 Stator frame
8.2 Rotor
8.3 Generator Parameters
8.4 Cooling of generator
8.5 Seal Oil Operation
8.6 Main Exciter
8.7 Electric Transformer
8.71 Working Principle
8.72 Main Part
8.73 Classification
8.74 Type of cooling
8.75 Main Part of transformer
28
28
29
30
31
31
34
36
36
37
38
38
9. Electric Switchyard
9.1 Outdoor Equipment
9.2 Indoor Equipment
43
43
44
CONCLUSION 60
REFERENCE 61