This document summarizes a seminar presentation on Power Line Carrier Communication (PLCC). It acknowledges those involved in the project and thanks various professors and colleagues. It then covers: an introduction to PLCC and how it works; basic principles including modulation; equipment used both outdoors and indoors; coupling arrangements; a block diagram of typical PLCC installation; advantages and disadvantages; and references.

1. Welcome to
Shankara
Institute of Technology
Seminar on Power Line Carrier
Communication
(PLCC)
Presented to:- Presented by:-
Mr. Rajesh Kanwadia and Ramanand Sagar
Ms. Shweta Agarwal B.Tech (VIITh SEM)
Assistant professor 12ESIEC047
(ECE Department)

2. ACKNOWLEDGEMENT
 I am grateful to Mr. R. P. Meena (Assistant engineer) for providing me an
opportunity to work as a trainee in PLCC section of Chambal G.S.S. I am
thankful to Mr. Rajesh Chander Singh (R.M-II) all other technical staff of
PLCC of their valuable practical guidance and their keen interest in my
training.
 I am very grateful to Mr. Ashutosh Mishra (HOD of ECE Department) to give me
opportunity to go under training at PLCC SECTION 132 KV, CHAMBAL G.S.S.,
JAIPUR as I was very enthusiastic about this. I am also very thankful to our seminar
in-charge Mr. Rajesh Kanwadia(Assistant professor of ECE Depatment and Ms.
Shweta Agarwal(Assistant professor of ECE Department).
 I am thankful to my batch- mate and as well as my training colleague.

3. CONTENTS
 INTRODUCTION OF RVPN
 INTRODUCTION OF PLCC
 BASIC PRINCIPLE OF PLCC
 EQUIPMENTS USED IN PLCC
 OUTDOOR EQUIPMENTS
 BASIC COUPLING ARRANGEMENT
 TYPES OF COUPLING
 INDOOR EQUIPMENTS
 WORKING WITH BLOCK DIAGRAM
 TYPICAL PLCC INSTALLATION
 ADVANTAGES AND DISADVANTAGES OF PLCC
 REFRENCES

4. Introduction of RVPN
 "An ISO 9001:2008 Certified Company“
 RVPN's Meter Testing Laboratories at Jaipur and
Udaipur are Now "ISO/IEC 17025:2005 Certified"
 Moto:- “ Energy Saved is Energy Generated”.
 It is the successor company of RSEB.
 Function :- Tranmission of bulk power from generating
stations to inter-phase point of Discoms.

5. How Work

6. Introduction of PLCC
 Communication using existing power cable is
called as PLCC.
 Power Line Communication (PLC) is a
communication technology that enables
sending data over existing power cables.
 PLCC is said to be backbone of Electrical
transmission system

7. Continued…
 For large power system power line carrier
communication is used for
1. Speech transmission
2. Data transmission and
3. Protection of transmission lines
 NEED OF PLCC
1. To cope up with ever increasing size of power grid
2. Need for economic and reliable means of
intercommunication between various generating station,
substation and control room
3. Avoid dependence of busy telephone lines

8. BASIC PRINCIPAL OF PLCC
 Power-line communications systems operate by
adding a modulated carrier signal on one
conductor, on two conductors or on all three
conductors of a high-voltage AC transmission
line
 Allotted frequencies range for this purpose is
from 24 to500 kHz, with transmitter power levels
up to hundreds of watts.

9. Continued…..
 To carry out this communication there is a
need of modulation. For PLCC, generally
amplitude modulation (AM) is used
 Sometimes frequency modulation is also
used if transmitting
medium is optical
fiber instead of
coaxial-cable.

10. EQUIPMENTS USED IN PLCC
Outdoor Equipment
1) Wave traps
2) LMU
3) CC/CVT
4) Drainage coils
5) Lightning arrester
6) Earthing switch
7) Co-axial cable
Indoor Equipment
1) PLCC panel
2) Battery bank
3) Battery charger
4) EPBAX
5) RTU
6) Modem

11. Wave Trap
Do not allow the transmitted HFcarrier to enter inside the
sub-station.
without line trap HF carrier get bypassed to some other line
on the same bus bar and may leak to ground.

12. Wave Trap function = PLC signal
Blocking
Substation
Line Trap = High Impedance for Career signle
Low Impedance for Power signle (50 Hz)
Power signle
PLCC Signal

13. LMU
LMU = impedance matching Transformer + high voltage
Protection
 To prevent dangerous potential on the PLCC
connection
 To match PLCC set & transmission Line
Matching + Protection
LMU

14.  Coupling Capacitor (C.C) :- Couples high
frequency carrier with Power Line ( 4000
to10000pF)
Coupling Capacitor = High Impédance to power frequency(50 Hz)
Low Impedance to career frequency
 Drainage coil :- If any leakage current flows
due to any distortion, then this drainage coil
arrests all leakage current and ground it so that
it does not cause any harm to the network.

15.  Lightning arrester :- Device used on electrical
power systems and telecommunications systems to
protect the insulation and conductors of the system from
the damaging effect of lightning.
 Earthing switch:- Used at the time of maintenance
of LMU.
 Co-axial cable :- Used for inter connection between
PLCC & L.M.U. for carrying the high frequency signal.

16. BASIC COUPLING ARRANGEMENT

17. TYPES OF COUPLING
1. Phase to ground coupling :-

18. Continued…
2. Phase to phase coupling :-

19. Continued…
3. Inter linecoupling :-

20. INDOOR EQUIPMENT

21. PLCC PANEL
Cabinet Module

22. ABB PLCC terminal ETL- 41
System data -- complies to IEC 495
 Operating mode : Single side band Suppressed carrier
 Frequency range: 40 to 500kHz (programmable in 4 kHz Steps)
 AF Bandwidth: 4 kHz (Speech band=300 – 3400 Hz)
 Transmitter RF output power : 40W ( +46 dBm)
 Receiver Selectivity : 70dB ( 300Hz from band limit)
 Receiver Image rejection > 80 dB

23. RTU, EPBAX and BATTERY BAANK
 R.T.U (REMOTE TERMINAL UNIT) :-
Interface with the electrical network to be monitored/controlled.
Collects, filters& processes the power system data and transmits it to the
control center.
Receives the control commands from the control centre
 EPBAX 2003(PLCC):- This is used for telephone facility at
PLCC and grid sub station.
 BATTERY BANK:- In case main supply is off, battery bank
supply required amount of supply power.
Now a day care-free VARLA BATTERR is used.

24. BATTERY CHARGER
Technical specifications:-
Normal input :- 415 V AC 3 Phase
Input variation :- +/- 20% of voltage
Float charger:-
Efficiency :- >70%
Line regulation & load regulation :- +/- 1% individual
Ripple :- 0.6 V PP (Peak to peak)
Boost charger:-
DC output :- 43.2 to 67.2 V
Output current: - 25-70 Amps.
Over load :- 10%
Efficiency :- >80%

25. Working with Block Diagram

26. Typical PLCC Installation
MS = Master station
PAX = Private automatic exchange
PR = Protection relay
PC = Computer
M = Modem
ETLETL
LT
LT
C
FAX
FAX
PR PC MS PAX FAX
M
PR PC RTU FAX
M
PR= Protection relay
FAX = Facsimile equipment
M = Modem
RTU = Remote terminal unit
cc cc

27. ADVANTAGES & DISADVANATGES
 ADVANATGES
 No separate wires are needed for communication purposes
 power lines have appreciably higher mechanical strength.
 Power lines have large cross-sectional areas resulting in very low
resistance per unit length.
 DISADVANTAGE
 Proper care has to be taken to guard carrier equipment and persons
using them against high voltages and currents on the lines.
 Noise introduced by power lines is far more than in case of
telephone lines. This is due to the noise generated by discharge
across insulators, corona and switching processes

28. REFRENCES
 [1] http://www.rajasthandirect.com/government-department/rajasthan-state-electricity-board
 [2] http://electrical-engineering-portal.com/power-line-career-communication-plcc
 [3] http://www.engineersgarage.com/articles/plcc-power-line-carrier-communication
 [4] en.m.wikipedia.org/wiki/Power-line_communication
 [5] en.m.wikipedia.org/wiki/Amplitude_modulation
 [6] Manual of ETI equipment
 A.B.B(Asea Brown Bowery Ltd)
 [7] ] http://www.engineersgarage.com/articles/plcc-power-line-carrier-communication

 [8] [ N.N.Biswas and Edition-1975], “Principles of carrier communication”.

 [9].Manual on Battery Charger
 Omega Electroics
 [10] slideshare.net/mobile/vishu_angira/power-line-career-communication