College seminar presentation for industrial training in RRVPNL, Ajmer on power line carrier communication.

1. A
INDUSTRIAL TRAINING PRESENTATION
ON
POWER LINE CARRIER COMMUNICATION
DONE UNDER THE EXECUTIVE ENGINEER
OF
RAJASTHAN RAJYA VIDYUT PRASARAN NIGAM LIMITED (R.R.V.P.N.L.)
AJMER (RAJ.)
 Guided By :
Mr. Arshad Nadeem
Mrs. Ankita Gupta
(P.T.S. Coordinator)
 Presented By :
Dushyant Singh Chouhan
11ESDEC031
EC-A, IVth Year
1DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING
POORNIMA GROUP OF INSTITUTIONS
SITAPURA, JAIPUR-302022

2. CONTENTS
 About the city
 Introduction of the company
 Introduction of the technique
 Working
 Components description
 Survey to the yard
 PLCC control room
 Applications
 Merits of PLCC
 Demerits of PLCC
 Future scope of the company
 Career in R.R.V.P.N.L.
 Learning and conclusion
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3. ABOUT THE CITY: AJMER
 Heart Of Rajasthan.
 Connecting 11 districts in supply of electricity.
 Area covered -87256 sq. Km.
 World Famous For Dargah Sharif And Trithraj Pushkar.
 Construction Of Nareli is under Process.
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4. INTRODUCTION OF THE COMPANY: RRVPNL
 The Successor company of R.S.E.B.
 Registered office at Vidyut Bhawan, Jyoti Nagar, Jaipur.
 Established On 19 July, 2000 by Govt. of Rajasthan under the
provisions of The Rajasthan Power Sector Reforms Act, 1999.
 An ISO 9001:2008 certified Company.
 Situated in Madar,11 km far from the Ajmer Railway Station.
 Motto:
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5.  Provides pathway for power in
rajasthan.
 Intra state transmission of
electricity through inter-state
transmission system.
 New creation of HV lines and
grid sub stations of 765 kv/400
kv/220 kv/132 kv rating
including there maintenance .
 Planning and co-ordination
relating to intra-state
transmission.
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6. PLCC
 Carrier frequency range of 32khz
to 508khz over high voltage
power transmission lines with
suitable line coupling
equipment.
 Amplitude modulation single
side band suppressed carrier
transmission to permit longer
range of transmission.
 Cost effective for long distance
communication.
 Transmission of speech,
facsimile, telegraphy, telemetry
and tele - protection signals is
done through PLCC.
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7. WORKING
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8. COMPONENT DESCRIPTION
 Lightning Arrester:
 A device connected between line and
earth i.e. In parallel with the over
headline, HV equipments and substation
to be protected.
 Safety valve which limits the magnitude of
lightning and switching over voltages at
the substations, HV equipments and
provides a low resistance path for the
surge current to flow to the ground.
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9.  Insulator:
 Provides insulation to the power
conductors from the ground so that
currents from conductors do not flow to
earth through supports.
 Connected to the cross arm of
supporting structure and the power
conductor passes through the clamp of
the insulator.
 Prevent any leakage current from
conductors to earth.
 Wave Traps:
 Trap the HF communication signals sent
on the line from the remote substation .
 Diverting the information to the telecom
panel in the substation PLCC control
room.
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10.  Circuit Breaker:
 In the operation of a power
system its function is to prevent
or limit damage during faults or
overloads, and to minimize their
effect on the remainder of the
system.
 Systems are divided into
protective zones separated by
circuit breakers.
 During a fault, the zone which
includes the faulted apparatus is
de-energized and disconnected
from the system.
 Used for circuit switching under
normal conditions.
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11.  Line Matching Unit:
 The out-put of PLCC is
connected to the line matching
unit before to the power lines to
achieve the proper impedance
matching in between PLCC
equipment and power line.
 CVT/CC (Control Voltage
transformer/Coupling
capacitors):-
 It is connected to the line
matching units and the power
line .
 used for blocking the high
voltage entering to the PLCC
Equipment. 11

12.  Battery Charger:
 PLCC panel works on rectified AC .
 when main supply goes off
uninterrupted power supply is
provided by the battery charger.
 Work as like online ups.
 Panel is connected to the batteries
and the battery is charged
simultaneously when the supply is
on.
 1 panel consume 1.5 ampere of
current.
 24 Batteries of 2v serially connected.
 Battery backup of 3 days is kept.
Battery
Charger
Float
Charger
section
Boost
charger
section
Control
Section
Alarm
Section
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13. SURVEY TO THE YARD
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14. PLCC CONTROL ROOM
 Consist of 6 PLCC panels, a
telephone exchange box, battery
charger, BPL landline telephone.
 PLCC panel is consist of
Main
Subrack
• VF interface
unit
• Channel
modem unit
• Data interface
unit
• Supervisory
unit
• Power
amplifier unit
• Power supply
unit
HF hybrid
subrack
• HF filter unit
• HF hybrid unit
• LCD and
keypad unit Termination
panel
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15. PLCC PANEL
 Puncom PLCC terminal pl-9500 (ver.-01)
 Single and dual channel configuration
 DSP techniques provide easy field programmability.
 Fully complies to EMI & EMC standards.
 Supervisory unit facilitates easy maintenance and
operation.
 Easy user interface using LCD display for status and
alarm monitoring.
 Has crystal band pass filters giving extremely good VF
response.
 Employs compressors and expanders to improve noise
performance.
 Cost up to 1.3 lac on paper. 15

16. APPLICATION
 Transmission of
 Speech
 Facsimile
 Telegraphy
 Telemetry
 & Tele protection of signals.
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17. ADVANTAGE
 Reaching all sites and hence reducing the cost of
constructing separate telephone lines.
 Appreciably higher mechanical strength, normally
remain unaffected under the conditions.
 Carrier signals suffer much less attenuation
 Very low price transmission
 No external agency clearance required
 Quick , and easy installation of the system.
 Allow excellent quality of signal up to 6 stations.
 Maintenance cost is low
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18. DISADVANTAGE
 Proper care has to be taken from time to time.
 Not user friendly.
 Noise interference is there
 One person is required at a time.
 Electricity theft occurs.
 If you have money, you have electricity.
 Periodic patrolling is important.
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19. FUTURE SCOPE OF COMPANY
 Tends to the privatization of the company.
 Internet connection is provided through PLCC.
 More sub grid stations construction is under process.
 More efficient systems are installed .
 New techniques are introduced.
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20. CAREER IN R.R.V.P.N.L.
 Post of Jen. is available.
 Good salary and other extra allowances.
 Time reliable job.
 Periodic tours.
 Other extra facilities.
 Employee of Rajasthan Govt.
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21. LEARNING AND CONCLUSION
 Its honour for me to work under the Executive Engineer of
R.R.V.P.N.L., Ajmer.
 Got to know about the PLCC techniques and equipments.
 Learn how Patrolling is done.
 Learn to maintain personal & professional life separately.
 Understand the Govt. working system.
 It has been exciting and challenging to understood the
fundamental concepts of power transmission and
equipments.
 It has been great experience for me to trained from a
government recognition in the field of electronics.
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22. REFERENCES
 User manual of PLCC panel
 Training notes
 Slideshare website- www.slideshare.net
 Rvpn website- www.rvpn.co.in
 Ajmer discom website- www.avvnl.co.in
 Seniors
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