1. VIGNAN INSTITUTE OF TECHNOLOGY AND MANAGEMENT
A SEMINAR REPORT ON POWERLINE COMMUNICATION
PRESENTATED BY
PRAYAS JAGDEV
REDG.NO
BARNCH-EEE,SEMESTER-7th

2. INTRODUCTION
NEED OF PLC
SYSTEM DESCRIPTION
COMPONENTS OF PLC
APPLICATION
ADVANTAGE AND DISADVANTAGE
CONCLUSION

3. Introduction
PLCC in modern electrical power system is mainly for telemetry and telecontrol.
Main data transmission system for telemetry and telecontrol are:
1)Use of telephone lines
2)Use of separate cables
3)power line carrier communication
4)Radio wave micro wave channel

4. Need of plc Carrier protection relaying of transmission line
Station to station communication between operating personnel
Carrier telemetring, electrical quantities that are telemetered are kW, kVA, kVAR, Voltage and Power factor etc.
It provides services related to power distribution such as load control, meter reading, tariff control, remote control and smart homes

5. system description
Each end of transmission line is provided with identical PLCC equipment consisting of equipment:
Transmitters and Receivers
Hybrids and Filters
Line Tuners
Line Traps
Power amplifier
Coupling capacitors

6. components of plc

7. wavetrap Connected in series with H.V transmission lines.
Acts as bandstop filter.
High Impedance for PLC signal.
Low Impedance for Power energy.

9. Wavetrap mounting options

10. Line matching unit(LMU)
LMU is a composite unit consisting of Drain Coil, Isolation transformer with Lightning Arrester on its both the sides.
known as coupling device

12. Function of Plcc terminal

13. APPLICATION INTERNET ACCESS TELEPHONY AMR(Automatic meter reading)
HOME AUTOMATION
VIDEO CONFERENCING

14. INTERNET ACCESS Offers right balance of cost,convinience and speed.
It gives high speed internet access to electrical networks.
Lower costs are achieved because the service is implemented on standard electrical lines and is already connected to almost all residence and business through electrical lines.
It speed would be 1Mbps, 20 times faster then a standard modem connection.
No need for bulky apparatus associated with wireless access

15. ADVANTAGE
No separate wires are needed for communication purpose,as the power lines themselves carry power as well as communication signals.hence the cost is less.
power lines have appreciably higher mechanical strength compare with ordinary lines.they would normally remain unaffected under the conditions,which might seriously damage telephone lines.
power lines usually provide the shortest route between the power stations.
power lines have large cross sectional area resulting in very low resistance per unit length.consequently carrier signals suffer much less attenuation than when they travel on telephone lines of equal leghths.
power lines are well insulated to provide only negligible leakage between conductors and ground even in adverse weather conditions.
largest spacing between conductors reduces capacitance,which results in smaller attenuation at high frequencies.the large spacing also reduces the cross talk to a considerable extent.

16. 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 telepgone lines.this is due to the noise generated by discharge across insulators,switching processes.

17. conclusion
Tests in plc have been carried out in 20 countries in around residences.the mapping of results has been extremely positive and forecasts a great demand for the system.
Digital power technology is definitely an exciting alternative to connect internet via phone and modem. Though this technology is not commercially available yet, it should be available over other broadband technologies due to relatively low cost of its local loop. Moreover, its high speed will provide internet access, local phone, and long distance service to customers.