1. PRACTICAL TRAINING
TAKEN AT
Bharat Heavy Electricals Limited(BHEL)
Bangalore(Karnataka)
DURATION: 02/06/2014 TO 14/07/2014
SESSION :2013-2014
Submitted to:-
Prof. chander shekhar
(b.tech,m.tech)
Presented by:-
Sunil Gaur
Batch: m-3
2. The Main gate of bhel EDN
P.B. NO.2606,Mysore road,Bangalore-560026,INDIA
3.
4. Company overview
• BHEL Electronics Division is a leading supplier of new Generation Power Plant
Automation and Control System.
• BHEL is the largest engineering and manufacturing enterprise in India in the
energy related infrastructure sector today.
• BHEL was established more than 40 years ago when its first plant was setup in
Bhopal.
• 65% of overall electricity is generated by BHEL. And 75% of overall electricity is
generated by the BHEL’s equipments .
• BHEL EDN, Bangalore was found in 1976, mainly to establish a strong base in the
area of power and industrial electronics.
• It is one of the only 7 mega Public Sector Undertakings (PSUs) of India
clubbed under the esteemed 'Maharatna' status.On 1 February 2013,
the Government of India granted Maharatna status to Bharat Heavy
Electricals Limited
5. • Registered Office & Corporate HQ : New
Delhi
NEW DELHI
BARODA
NAGPUR
PATNA
CALCUTTA
VARANASI
GOINDWAL
HARIDWAR
RUDRAPUR
JAGDISHPURJHANSI
BHOPAL
HYDERABAD
BANGALORE
RANIPET
TIRUCHIRAPALLY
CORPORATE OFFICE
MANUFACTURING ATIONS
SERVICE CENTRES
• 4 Power Sector Regional Setups
• 18 ROD offices
• Corporate Research &
Development Division : Hyderabad
• 8 Service Centre
• 15 Manufacturing Plants
6. Sl.No Manufacturing
Units
Location Products
1. Heavy Electrical Plant Bhopal Steam turbine, Turbo generator, Hydro turbine ,
Hydro generator, Switchgear , Transformers,
Motors.
2. Transformer Plant Jhansi Dry/Special Transformers, Electric & Diesel
Locomotives, Transformers, Bus Ducts
3. Heavy Electrical
Equipment plant
Haridwar (HEEP) Steam and Gas Turbine ,Turbo generators ,Hydro
Turbines and Generators, Large AC/DC motors.
4. Central Foundry
Forge Plant
Haridwar Heavy Casting, Steel Castings and Steel Forgings
5 Heavy Power
Equipment Plant
Hyderabad Power Generating Sets, Industrial Turbo Sets,
Compressors, Pumps, Heaters, Bowl Mills, Gas
Turbines, Switchgear.
6 High Pressure Boiler
Plant
Tiruchirappalli Power Boilers, Industrial Boilers, Nuclear Steam
Generating Equipment.
7 Boiler auxiliary plant Ranipet Air Pre Heaters, Fans, ESP.
7. CERTIFICATIONS AWARDED TO BHEL
• The Unit is awarded with the following certifications:
• ISO 9001: Quality Systems and Procedures
• ISO 14001: Environment Management System Certification
• OHSAS 18001: Occupational Health and Safety Assessment Series.
• ISO 27001: Information Security Management System Standard.
• BUSINESS EXCELLENCE – Significant achievement
• It is the 7th largest power equipment manufacturer in the world.
• BHEL received the National Intellectual Property Award 2014 and WIPO
Award for Innovative Enterprises 2014
• BHEL won the DSIJ Award 2013 for the Most Efficient Maharatna PSU
• It won the Golden Peacock Award 2013 for Innovation Management
• The company received the India Pride Award 2013 for Excellence in
Heavy Industries
8. Shareholding
• BHEL's equity shares are listed on Bombay Stock Exchange and National Stock Exchange of
India. Central Government of India and State governments in India hold majority of the
shares of BHEL.
Shareholders (as on 30-Mar-2014) Shareholding
• Central Government of India and State governments 63.06%
• Foreign Institutional Investors (FII) 16.14%
• Insurance companies 11.01%
• Banks, Financial Institutions and Mutual Funds 05.46%
• Individual shareholders 02.89%
• Others 01.44%
• Total 100.00%
10. COMPANY MANAGEMENT
• CHAIRMEN & MD
Mr. B.prasada RAO
( since 1 oct.2009)
• Director HR
Mr. R. KRISHNAM
( since 1 april 2012)
11. PRODUCT PROFILE OF BHEL-EDN
• Steam Generator Controls ( Boiler Controls)
• Turbine Generator Controls
• Balance of Plant
• HMI/SCADA (Human Machine Interface)
• Static Excitation Equipment / Digital Voltage Regulators
• Variable Frequency Drives
• Traction Drives
• Gas Turbine Controls
• Transmission systems controls
• High Current Rectifiers
• Power Devices
• Photovoltaic cells/ Space grade solar cells
• Induction Heating Equipments (ESD)
• Defence Equipments (ESD)
12. TRACTION DRIVES
• These panels control the traction motors.
• Traction drive systems are extensively used in 1600 HP Broad Gauge AC or AC/DC
Electrical Multiple Units (EMUs) and 6000 HP three Phase AC Locomotives for
Indian Railways.
• Gate Turn Off Thyristor (GTO)/Insulated Gate Bipolar Transistor (IGBT) are now-a-
days used for Traction applications.
14. max/metso DNA PANELS:
Steam Generator Controls: These panels
monitor and control the boiler parameters.
Eg: FSSS- Furnace Safeguard Supervisory System
SBC- Soot Blower Controls
SADC- Secondary Air Damper Controls
APRDS- Aux PRDS Control system
HP BYPASS- HP Bypass controls
Turbine Generator Controls: These panels
monitor and control the turbine
parameters.
Eg: ATRS ( Auto Turbine Run-up System)
Turbine System Control
Oil level Control
Condenser & Evacuation System Control
TSE- Turbine Stress Evaluation Control
EHTC– Electro Hydro Turbine Control
LPBP– Low Pressure By-Pass Control
Turbine Protection Control
ATT– Automatic Turbine Testing
Balance of Plant Control: These panels
monitor and control:
Coal Handling Plants
Ash Handling Plants, C&I
ID fans, FD fans
15. VARIABLE FREQUENCY DRIVE/ LOAD COMMUTED INVERTER
These panels control the speed of the following machines by varying the frequency:
• fans (ID fan, FD fan, Primary air fan), pumps (feed water, condensate and circulating),
compressors
• run up systems for gas turbines
• frequency converters, motor starters,
• start up of synchronous generators as condensers or start up of hydro generators in
pump storage.
It consists of Control and Excitation Panel, Fan and Filter Panel and Bridge Panel
16. GAS TURBINE CONTROLS
• These panels monitor and control the gas turbine
parameters.
• Naphta and Natural gas are used as the fuel-Gas is
compressed and ignited for turbine control
• In EDN , it develop software, 9-253 MW controls available
• Widely used in refineries
17.
18. SYSTEM TESTING
• It checks the operation of finished goods.
• System testing receives engineering drawing , signal flow
diagram and conducts various test like continuity test ,
high voltage test, functional test.
• Air conditioned test area of appox 2500 m sqr.
• Capacity to line up and test upto 600 cubicales at a time
across 5 test shops.
• 3 types of test
• continuity test
• High voltage test
• Functional test
21. PV manufacturing
What materials are used to produce solar cells?
The most important material for solar cells production is silicon. At the
time being, it is almost the only material used for solar cell mass
production.
Monocrystalline silicon Polycrystalline silicon
22. • Formation of microscopic pyramids on surface of wafer is
called texturization.Sodium Hydroxide is widely used for this
stage of process. Pyramids size must be optimized, since very
small pyramids lead to high reflection, while very large one
can hinder the formation of the contacts.
Texturization
23. diffusion
• Photo voltaic cell is nothing but PN junction diode, in this
stage PN junction is formed through process of diffusion
.Phosphorous is universally used as the n-type dopant for
silicon solar cells .Since solid state diffusion demands high
temperature,it is very important that surfaces are
contamination free before process. Wafers are placed in
quartz tray and kept in a diffusion furnace at temperature of
700˚C.Furnace is filled with N2 gas it prevent reacting takes
place with some other impurities.
24. N-type regions at the wafers edges would interconnect the front
and back contacts .The junction would be shunted by this path
translating into a very low shunt resistance. In order to isolate
this edges etch with plasma is widely employed.
Plasma etching
25. Air coating
• Cell efficiency is further raised by anti reflection coating on surface of
texurized,diffused silicon wafer.
Silicon nitride is widely used as masking film in microelectronics.
For solar cells,it present the advantage of performing as an effective
Anti-reflection coating Films can be deposited by several techniques
,but most commonly used process is CVD,involves
reaction of silane gas and Ammonia.
26. Screen printing
Front Contact printing: The requirement for the front
metallization are low contact resistance
to silicon, low bulk resistivity, low line width
Back contact print: Same
operations are performed on the
back side of the cell except the
paint contains both silver and
aluminum& the print pattern is
different.
27. firing
• Organic compound of the paste must be burnt
off, the metallic grains must sinter together to
form a good conductor, and they must form
an intimate electric contact to the underlying
silicon and the back contact on the parasitic n
type rear layer.
28. Cell testing
• Solar cells so manufactured are illuminated under
an artificial light source with a spectral content
similar to sunlight at 25˚C to get I-V curve.
Defective devices are rejected & rests are
classified according to their output. Here we
established a number of classification based on
its short circuit current at particular voltage near
maximum power point. Module subsequently
built with cells of the same classification, thus
guaranteeing minimum mismatch loss.
30. framing
• The automatic framing station is used for aligning rectangular
Aluminum frame pieces by applying proper force to ensure
accurate frame assembly. It also punches the frames at the
corner block positions for rigidity.
