In this presentation you will mainly find the basic of the power plant. Like boiler, circuit breakers, transformer, synchronous generator, etc.

1. z
Generation, Transmission and Distribution
of Electric Power in Urea Manufacturing
Plant
Six weeks summer training report Presentation
On
BY:
Bikram Prasad (B-
40)
Reg. No. 11613801 Section- E1615
At:
National Fertilizer Limited, Bathinda

2. Content
1. About National Fertilizer Limited
2. About NFL, Bathinda
3. NFL Power Layout
4. Captive Power Plant
5. Why Captive power Plant???
6. Captive Power Plant, Bathinda
7. Steam Generation Plant (S.G.P)
8. Components of Plant
9. Boilers
10. Turbines
11. Turbo-Generator
12. Features of synchronous Generator
13. Electrostatic Precipitator
14. Main Receiving sub-station
15. Circuit breaker
16. Current transformer
17. Potential transformer
18. Transformer
19. conclusion

3. About National Fertilizer Limited
NFL was incorporated on 23rd August, 1974.
It is Mini Ratna (Category-I) company.
It comes under the administrative control of Ministry of Chemicals and
Fertilizers.
It is the second largest producer of key fertilizer in India.
NFL has five gas based Ammonia-Urea plants viz. Nangal & Bathinda plants in
Punjab, Panipat plant in Haryana and two plants at Vijaipur in Madhya Pradesh.

4. About National Fertilizer Limited, Bathinda
 NFL, Bathinda was established in the year 1979.
 It is getting power from M/s PSPCL, through double circuit 132 KV line with a contract demand of
33 MVA.
 Captive Power Plant is installed at NFL, Bathinda with a capacity of 2×15 MW.
 NFL-Bathinda is getting power from PSPCL at 132KV but the generators at CPP generate power
at 11KV. Therefore, this voltage is stepped-up to 132KV through two step-up transformers.
 At MRS 132KV bus PSPCL power and CPP power gets synchronized.

5. Captive Power Plant
Captive Power refers to power generation from a unit set up by
industry for its exclusive consumption.
Industrial sector is one of the largest consumers of electrical energy
in India.
Industries are now increasingly relying on their own generation
(captive and cogeneration) rather than on grid supply.

6. WHY ON CAPTIVE POWER PLANT???
Non-availability of adequate grid supply
Poor quality and reliability of grid supply
High tariff as a result of heavy cross subsidization.

7. Captive Power Plant, Bathinda
NFL, Bathinda was drawing electric power
from Punjab State Electricity Board
(P.S.E.B).
There are 2×15MW of turbo-generators to
generate power.
Under normal condition, the generated
power runs in synchronization with the
P.S.E.B.

8. Steam Generation Plant (S.G.P):
The steam generating plant consists of a boiler
for the production of steam (which is used to
run the turbo-generators of the captive power
plant) and other auxiliary equipment for the
utilization of flue gases.

9. Components of S.G.P
1. Boilers
2. RC feeder (3.7KW): Raw Coal Feeder (RC feeder) feeds raw coal to the mill
motor.
3. Mill Motor (280KW): This motor crushes the raw coal to provide to the boilers.
4. Air preheater Motor (3.7KW)
5. Forced Drought Fan (150KW): FD fan provides air to the APH.
6. Induced drought Fan (160KW):
7. Clinker Grinder
8. Ash Handling plant:
• Ash water pump motor (250KW)-run by 11kV
• ESP (Electrostatic Precipitator):
9. Coal Handling Plant:

10. Boilers
It is an enclosed vessel in which water is heated
and circulated until the water is turned into steam
at the required pressure .
Pulverized coal is put in boiler furnace.
Coal is burned inside the combustion chamber of
boiler.
Steam from the combustion chamber is used to
move the prime mover which is nothing but the
turbine.
3 no. Water Tube Boiler is installed at NFL,
Bathinda unit.

11. Turbines
Turbine is a device that extract thermal energy
from pressurized steam and uses it to do
mechanical work on a rotating output shaft
(here generator).
The turbine is connected to the generator
through speed reducing gears.
This is done so as to have better control on
frequency.

12. Turbo-Generator:

13. Turbo-Generator (contd.)
The turbo-generator is the combination of a turbine directly connected to an
electric generator for the generation of electric power.
There are two turbo-generators of 15MW capacities each.

14. S.no. Features Details
1. Company name Jeumount Schneider- France
2. Degree of Protection IP 54
3. Type of Excitation Brushless
4. Insulation Class Stator F, Rotor F
5. Temperature Rise Stator 70°K, Rotor 70°K
6. Generator Weight 44000Kg
7. Output 187550 KVA, 15000KW at 0.8pf
8. Connection Type Star-Delta
9. Voltage, Frequency, Phase 11000V, 50Hz, 3
10. Current 984 A
11. Speed, Permissible Over Speed 3000 rpm, 3600 rpm
12. Excitation Voltage 163 V
13. Excitation Current 580 A
Features of Synchronous Generator:

15. Electrostatic Precipitator:
It is a device which removes dust or other finely divided particles from flue
gases.
It is by charging the particles inductively with an electric field, then attracting
them to highly charged collector plates.
Some of the usual applications are:
(1) Removal of dirt from flue gases in steam plants.
(2) Cleaning of air in ventilation and air conditioning systems.
(3) Cleaning of blast furnace gases.

16. Main Receiving substation
M.R.S. (Main Receiving Station) provides the facility of switching, control, and
protection of electric power. It gets Double circuit 132KV from GNDTP,
Bathinda. 11KV generated at CPP is stepped-up to 132KV and then it is send to
MRS, where it is then synchronized with the GNDTP incomers.
Components in M.R.S:
1. Bus Bar
2. Lightening Arrestor
3. Circuit Breaker
4. Isolator
5. Current Transformer
6. Potential Transformer
7. Power Transformer

17. Circuit Breaker:
Circuit breakers are mechanical devices designed to close or open contact
members, thus closing or opening of an electrical circuit under normal or
abnormal conditions.
S.No. Type Voltage Levels
1. SF6 Circuit Breaker 132KV
2. Vacuum Circuit Breakers 3.3KV
3. Minimum Oil Circuit Breakers 3.3KV
4. Air Circuit Breakers
415KV

18. Current Transformers
 Current transformers are series connected in instrument transformers.
 Current transformers are basically used to take the readings of the currents entering the substation.
 This transformer steps down the current from 800 amps to 1 amp.
 This is done because we have no instrument for measuring of such a large current.

19. Potential Transformers
 There are two potential transformers used in the bus connected both side of the bus.
 The potential transformer uses a bus isolator to protect itself.
 The main use of this transformer is to measure the voltage through the bus. This is done so as to get
the detail information of the voltage passing through the bus to the instrument.

20. Transformers
 Transformer is a static machine, which transfer the
potential of alternating current at same frequency.
 It means the transformers transforms the low voltage
into high voltage & high voltage into high voltage
without changing the frequency.
 It works on the principle of mutual inductance.
 When the energy is transformed to a higher voltage,
then it is called step up transfomer and then it is
transmitted at lower voltage it is called step down
transformer.

21. Transformers (contd.)
In NFL there are basically 2 different ratings of transformers are used:
1. Generating Transformer (GT) : 11KV/132KV
2. Unit Auxiliary Transformer (UAT): 11KV/3.3KV and 11KV/415KV
S.no. Voltage levels Motor Ratings
1. 11 KV ≥1000 KW
2. 3.3 KV 150 KW-1000 KW
3. 415 V <150 KW
Different Motor ratings used at different voltage levels.

22. Thank You