05-12-2012, 05:49 PM
powerline communication
Power Line Communication.ppt (Size: 1.81 MB / Downloads: 47)
INTRODUCTION
WHY POWER LINE COMMUNICATION BECAME IMPORTANT..?
The usage of the power grid for control, maintenance and charging purposes by the utility commodities.
The liberalization of telecommunications.
The deregulation of electricity utilities, which have added new dimensions to the potential application of the electricity infrastructure.
The birth and growth of the Internet has accelerated the demand for digital telecommunications services to almost every premises.
A truly universal information superhighway might be realized, with the capability of providing interconnection to every home, factory, office, and organization.
POWER LINE COMMUNICATION SYSTEMS
Power line communication is the usage of electrical power supply networks for communication purposes.The main idea behind PLC is the reduction of cost and expenditure in the realization of in-home PLC networks.
Power Supply Networks
High Voltage (110-380kV) networks : Connnect the power stations with large supply regions or big customers.
Long Distances, power exchange with in a continent.
Overhead supply cables.
Medium Voltage(10-30kV) networks : Supplies larger areas,cities and big indutrial or commercial customers.
Overhead supply cables and underground networks.
Low-Voltage(230V in Germany) networks: Supply the end users either as individual cutomers or ass single users of a bigger customer.
Overhead and underground cables.
Types of PLC Architecture
A Band for power supply Utilities, e.g. Energy related services.
B and C Band for private uses, e.g. For building and home automation.
Data Rate upto few thousands bits per second.
Maximum distance covers upto 1 k.m.
Needs repeater for long distance technique.
Modulation scheme that can be used
ASK(Amplitude shift key) not rohbust againt disturbances, therefore not good for PLC networks.
FSK(Frequency Shift key), comperatively better then ASK.
BPSK(Binary Phase Shift key), it is complex but quite commonly used.
OFDM(Orthagonal Frequency Division Multiplexing, much more rohbust against disturbances,which makes it good for PLC networks.
In Home PLC Network
In –home PLC(indoor) systems use internal electrical infrastructure as transmission medium.
PLC LAN with in houses, which connect typical devices in a private home like telephone computer, printer, vedio devices and so on.
A base station controls an in-home PLC network and connects it to the outdoor area.
All devices are connected via a PLC modem.
The modems are connected to the wall power supply sockets(outlets)
which are available in the whole flat.
Power Line Communication.ppt (Size: 1.81 MB / Downloads: 47)
INTRODUCTION
WHY POWER LINE COMMUNICATION BECAME IMPORTANT..?
The usage of the power grid for control, maintenance and charging purposes by the utility commodities.
The liberalization of telecommunications.
The deregulation of electricity utilities, which have added new dimensions to the potential application of the electricity infrastructure.
The birth and growth of the Internet has accelerated the demand for digital telecommunications services to almost every premises.
A truly universal information superhighway might be realized, with the capability of providing interconnection to every home, factory, office, and organization.
POWER LINE COMMUNICATION SYSTEMS
Power line communication is the usage of electrical power supply networks for communication purposes.The main idea behind PLC is the reduction of cost and expenditure in the realization of in-home PLC networks.
Power Supply Networks
High Voltage (110-380kV) networks : Connnect the power stations with large supply regions or big customers.
Long Distances, power exchange with in a continent.
Overhead supply cables.
Medium Voltage(10-30kV) networks : Supplies larger areas,cities and big indutrial or commercial customers.
Overhead supply cables and underground networks.
Low-Voltage(230V in Germany) networks: Supply the end users either as individual cutomers or ass single users of a bigger customer.
Overhead and underground cables.
Types of PLC Architecture
A Band for power supply Utilities, e.g. Energy related services.
B and C Band for private uses, e.g. For building and home automation.
Data Rate upto few thousands bits per second.
Maximum distance covers upto 1 k.m.
Needs repeater for long distance technique.
Modulation scheme that can be used
ASK(Amplitude shift key) not rohbust againt disturbances, therefore not good for PLC networks.
FSK(Frequency Shift key), comperatively better then ASK.
BPSK(Binary Phase Shift key), it is complex but quite commonly used.
OFDM(Orthagonal Frequency Division Multiplexing, much more rohbust against disturbances,which makes it good for PLC networks.
In Home PLC Network
In –home PLC(indoor) systems use internal electrical infrastructure as transmission medium.
PLC LAN with in houses, which connect typical devices in a private home like telephone computer, printer, vedio devices and so on.
A base station controls an in-home PLC network and connects it to the outdoor area.
All devices are connected via a PLC modem.
The modems are connected to the wall power supply sockets(outlets)
which are available in the whole flat.