07-02-2012, 03:47 PM
POWER LINE COMMUNICATION
POWER LINE COMMUNICATION.pptx (Size: 1.11 MB / Downloads: 85)
INTRODUCTION
Power line communication or power line carrier (PLC), also known as Power line Digital Subscriber Line (PDSL) are systems for carrying data on a conductor also used for electric power transmission.
Power Line Communication utilizes the power line installed in houses or offices as the medium of communication, transmitting communication signals in high frequency between 100KHz to 30MHz.
Power line communications systems operate by impressing a modulated carrier signal on the wiring system.
Different types of power line communications use different frequency bands, depending on the signal transmission characteristics of the power wiring used.
Medium frequency (kHz):
Power line communications technology can use the electrical power wiring within a home for home automation: for example, remote control of lighting and appliances without installation of additional control wiring.
Transmitting radio programs:
Sometimes PLC was used for transmitting radio programs over powerlines. When operated in the AM radio band, it is known as a carrier current system.
Such devices were in use in Germany, where it was called Drahtfunk and in Switzerland, where it was called Telefonrundspruch.
To prevent uncontrolled propagation, filters for the carrier frequencies of the PLC systems were installed in substations and at line branches
POWER LINE COMMUNICATION.pptx (Size: 1.11 MB / Downloads: 85)
INTRODUCTION
Power line communication or power line carrier (PLC), also known as Power line Digital Subscriber Line (PDSL) are systems for carrying data on a conductor also used for electric power transmission.
Power Line Communication utilizes the power line installed in houses or offices as the medium of communication, transmitting communication signals in high frequency between 100KHz to 30MHz.
Power line communications systems operate by impressing a modulated carrier signal on the wiring system.
Different types of power line communications use different frequency bands, depending on the signal transmission characteristics of the power wiring used.
Medium frequency (kHz):
Power line communications technology can use the electrical power wiring within a home for home automation: for example, remote control of lighting and appliances without installation of additional control wiring.
Transmitting radio programs:
Sometimes PLC was used for transmitting radio programs over powerlines. When operated in the AM radio band, it is known as a carrier current system.
Such devices were in use in Germany, where it was called Drahtfunk and in Switzerland, where it was called Telefonrundspruch.
To prevent uncontrolled propagation, filters for the carrier frequencies of the PLC systems were installed in substations and at line branches