1. INDUSTRIAL TRAINING
AT
ABHITENDRA SINGH
B.TECH IV YEAR
SECTION - F

2. ABOUT
NTPC Limited is the largest power generating
company of India.
A public sector company, it was incorporated in
the year 1975 to accelerate power development
in the country as a wholly owned company of the
Government of India.
It has an electric power generating capacity of
41,184 MW.
It is one of the seven Maharatna companies.

3. ABOUT
It has
15 coal based (24,395 MW).
7 gas based (3,955 MW).
4 Joint Venture Projects (2,294 MW).
NTPC's share on 31 Mar 2008 in the total
installed capacity of the country was 19.1% and it
contributed 28.50% of the total power generation
of the country during 2008-09.

4. AURAIYA GAS POWER PLANT
NTPC Auraiya is located at Dibiyapur in
Auraiya district in the state of Uttar Pradesh.

5. AURAIYA GAS POWER PLANT
BRIEF DISCRIPTION
•Type of station : Gas based combined cycle
•Established : 1989
• Location : Dibiyapur in Auraiya district of UP
•Fuel : Natural Gas, Naphtha
• Fuel source : HBJ Pipeline - South Basin Gas field
• Water source : Auraiya – Etawah Canal
• Gas Turbine Output : 4X110 MW
• Steam Turbine Output : 2X106 MW
• Net plant Output : 652 MW
• Water Consumption : 3.2 cusecs
• Beneficiary States : Uttar Pradesh, Jammu & Kashmir, Himachal
Pradesh, Chandigarh, Rajasthan, Haryana,
Punjab , Delhi & Uttranchal.

6. AURAIYA GAS POWER PLANT
Major affecting conditions are ambient
temperature, Barometric pressure and Power
Factor at generator terminals.
AuGPP has two combined cycle gas module
each consisting of two gas turbines, waste heat
recovery boilers (WHRB) and one steam
turbine.
The capacity of each Gas Turbine is 111.76
MW and that of Steam Turbine is 110 MW.
Total capacity of each Module: 326 MW.

7. AURAIYA GAS POWER PLANT
The AuGPP can be basically divided into two sub-plants:
AuGPP
Switchyard
Main Plant

8. MAIN PLANT
The Main Plant consists mainly of the
following componenets:
1.Gas Turbines
2.Steam Turbines
3.Waste Heat Recovery Boiler
4.Generators

9. Module-1Module-2
220KVSWITCHYARD
FROM
KANPU
R
TO
AGRA
(PGCIL)

10. GAS TURBINE
Gas Turbine is a heat engine.
In the Gas Turbine, the following
processes take place:
Compression
 of working medium (air) taken from
atmosphere in a compressor.
Combustion
 Increase of working medium
temperature by constant pressure
ignition of fuel in combustion
chamber.
Expansion
 of the product of combustion in a
turbine.

11. APPLICATIONS OF GAS TURBINE
Conventional applications are
 Simple cycle operation.
 Combined cycle operation.
Electric utility companies use gas turbine
predominantly in simple cycle and combined
cycle applications.
Combined cycle operation is much efficient
than open cycle operation.

12. STEAM TURBINE
There are 2 steam turbines in number, present in the full
AuGPP
The two waste heat recovery boilers combined their output to
one turbine.
The turbine gets its feed from the low pressure (LP) and high
pressure (HP) drums.
The low pressure drums give its output directly to the turbine
but the HP drums give its output to the supper heater and then
to the turbine.
In this way, steam turbine consists of two turbines – Low
Pressure(LP) and High Pressure(HP) turbines.
The steam turbine operates on Rankine cycle.

13. GAS TURBINES VS. STEAM TURBINES

14. GENERATOR
Generator is three phases, two pole air cooled machine.
The mechanical energy generated by turbine is
converted to electrical energy by the generator and
appear in the stator winding in the form of current and
voltage. This balances the torque of the gas turbine.
 It lead the magnetic flux, and carries the field winding,
the generator is self excited. The power required for the
excitation is taken from the generator terminals and fed
to the field winding through the excitation transformer
and the thyristor- controlled rectifier units.

15. WASTE HEAT RECOVERY BOILER
AuGPP is also known as Waste Heat Recovery Boilers
(WHRB) plant, which is of non-fired, dual pressure and
forced circulation type. The boiler has two different
water/steam cycle known as high-pressure system and low-
pressure system.
Components of WHRB
The main components of the WHRB can be divided into
following categories:
LP Economizer
LP Drum & Evaporator
LP Super-heater
HP Economizer
HP Drum & Evaporator

17. SWITCHYARD
It is a medium for exchange of power from source to
load or from one source to another.
It consists of switching equipment, measurement,
protection and control equipment required for power
generation and utilization.
Some of the main components of Switchyard are:
• Circuit Breaker(CB)
• Isolator
• Current Transformer(CT)
• Capacitive Voltage Transformer(CVT)
• Lightning Arrester(LA)
• Wave Trap
• Earth Switch

18. SWITCHYARD
There are mainly two sub-systems for
the transmission of electricity in the
Switchyard:
I. 400 kV System
II.220 kV System

19. 400 kV SYSTEM
Used for transmission
with Agra and Kanpur.
Contains
2 Main Bus
One and a Half Breaker
Scheme
15 Bays

20. 400 kV BUS SCHEMES
One and half
breaker scheme
Main Bus-2
Main Bus-1

21. 220 kV SYSTEM
Used for transmission
with Sikandara SS,
UPPC Pata SS,
Phaphund SS and
Malanpur SS.
Contains
2 Main Bus
1 Transfer Bus
24 Bays

22. 220 KV BUS SCHEMES
6 Generators
2 Stn.transformers
Bus
Coupler
Transfer
Bay
8 Transmission lines
Transfer Bus
Main Bus-1
Main Bus-2
Double main and Transfer bus scheme

23. ADVANTAGES OF GAS BASED
PLANTS
High Thermal Efficiency
Low Water Requirements
Environment Friendly
Fast Start-Up
Low Installation Cost