PRACTICAL TRAINING

TAKEN AT

Bharat Heavy Electricals Limited(BHEL)

Bangalore(Karnataka)

DURATION: 10/06/2013 TO 09/07/2013

SESSION :2013-2014

Submitted to:- Presented by:-

Mr. Tarun Dadhich Priyanka Yadav

Batch:-E.C.5

Content• Introduction• BHEL products 1. Electronic department -• System testing • Solar photovoltaic2. general layout - • SCADA systems• HVDC systems• OTS systems• Conclusion

Introduction:

• 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.

• BHEL is one of India’s nine larger Public Sector Undertakings or

PSUs ,known as the NAVRATNAS or the nine jewels .

• 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.

BHEL PRODUTS

1. System testing department :-• 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

ELECTRONIC DEPARTMENT

System testing department

2. Solar Photovoltaic cell assembly

• PV cell is an electrical device which converts energy of the light directly into the electricity by photoelectric effect.

• PV cell was developed at Bell Laboratory in 1954.• Monocrystalline Si, Polycrystalline Si, Cadmium

Telluride are mostly used material for PV manufacturing.

• Operation of PV cell requires 3 basic attributes-i. Absorption of light.ii. Separation of opposite Charge carriers.iii.Separate extraction of carriers to an external circuit.

Si Wafer

Air coatingScreen printing

Texturisation

firingCell testingCell

Diffusion Plasma Etching

PSG Removal

Lamination Testing and framing PV module

PHOTOVOLTAIC Manufacturing flow chart :-

SCADA systems:-• Stands for supervisory control And data acquisition.• SCADA systems are used in industrial processes: steel making,

power generation (conventional and nuclear) and distribution.• There Are 4 Components In the SCADA System. Field Instrumentation Remote Terminal Units. Communications Network. Central Monitoring Station• SCADA is used as safety tool as lock- out tag-out.• SCADA consist of human machine interface.• It also consist of RTU , which is connected to sensor and PLC which

is used as the field devices because they are more economical , flexible , versatile than RTU’s.

• HMI device present the processed data to a human operator.

GENERAL LAYOUTS

Working of SCADA System :

• Most control actions are performed by RTU and MPLC’s.

• Data acquisition begins at RTU’s and PLC’s level then data is compiled and formatted .

• SCADA system typically implements a distributed database called ‘tag database’.which contains data element called ‘tag or point’.

• A point represent a single input or output value controlled by system.it can be ‘hard or soft’

• Point are stored as value timestamp pair:a value and timestamp.

• A series of value timestamp gives history of point.

• Diag shows the SCADA operation for flowing water.

High Voltage Direct Current Systems:

• there arises some technical problems of transmitting power to such a long distance using AC.In the view of the draw backs of ac the HVDC transmission has come into picture.

• The use of an HVDC link in an ac system requires converter stations at each end of the line.

• In 1977 HVDC system has used only solid state devices , in most cases thyrister valve.

• HVDC using thyrister valve called “line cumulated converter(LCC ) “.due to some limitation in LCC ,CCC HVDC are used.

• CCC differs from a conventional HVDC ,like it has a series of capacitors inserted in AC line connection either on primary or sec. side on converter transformer.

Advantages:

Technical

• Reactive power requirement

• System stability• Short Circuit Current• Independent Control of

ac system• Fast change of energy

flow

Economical

• DC lines and cables are cheaper than ac lines or cables.

• The towers of the dc lines are narrower, simpler and cheaper compared to the towers of the ac lines.

• Line losses in a dc line are lower than the losses in an ac lines.

Hvdc Transmission:

Operator Training Simulator System:

• OTS is an computer based training system that uses a dynamic simulation.

• Simulator is configured in a virtual environment with exact replica of actual plant condition.

• Elements of a typical OTS:i. Dynamic simulation software ii. Process modeliii.Instructor interfaceiv.DCS emulatorv. Replica of operator station

OTS Features by BHEL:

• Simulator is developed based on mathematical and physical model approaches.

• It consist of model server , instructor station, operator work section for training section and remote areas.

• Training simulator application consist of human machine interface , dynamic model sever and instructor station.

BHEL OTS system

Conclusion:-

• BHEL is the largest engineering and manufacturing enterprise in

India .

• The company manufactures 235 MW nuclear turbine generator sets

and in future it will 500 MW.

• BHEL is a major contributor of equipment and systems to

industries.

• At the all, till now BHEL is best in supply and manufacturing

products.

THANK YOU!

Any Query???