Power line carrier communication
- Power line carrier communication
Power Line Carrier Communication (PLCC) is mainly used for telecommunication, tele-protection and tele-monitoring between electrical substations through power lines at high voltages, such as 110kV, 220kV, 400kV.
In a PLCC system the communication is established through the power line. The audio frequency is carried by a carrier frequency and the range of carrier frequency is from 50kHz to 500kHz. The modulation generally used in these system is amplitude modulation.
The Audio frequency is in the range of 300 to 4000Hz. These Audio frequency is allocated in such a way that, it will include the audio signal,protection and the pilot frequency.
Connecting the PBX to the PLCC can make a network among this. Basically the electricity board in India have a network among them selfs using the PLCC and PBX.
Working: The human audio signal is converted/compressed into the range of 300 to 4000Hz AF, and this audio frequency is mixed with the carrier frequency. These carrier frequency is again filtered and amplified and transmitted. Around the clock a Pilot frequency (within AF range) will be transmitted and received by the plcc, this is done for the failure detection.
The transmition of these HF carrier frequency will be in the range of 0 to +32db. This range is set according to the distance between the substation.
ee also
* Power line communication
Wikimedia Foundation.
2010.
Look at other dictionaries:
Power Line Carrier — Als Trägerfrequenzanlage (TFA) bezeichnet man Anlagen zur Sprach oder Datenübertragung über Kommunikations oder Stromnetze, indem die Signale auf eine oder mehrere Trägerfrequenzen moduliert werden. Ein Vorteil des Systems ist, dass vorhandene… … Deutsch Wikipedia
Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… … Wikipedia
Power line communication — PLC (англ. Power Line Communication/Carrier) относительно новая телекоммуникационная технология категории «последняя миля». Так называемый «Интернет из розетки», базирующаяся на использовании внутридомовых и внутриквартирных электросетей для… … Википедия
Carrier current — is a method of low power AM broadcasting that does not require a broadcast license in the United States, but is allowed on the campus of any school, so long as the normal FCC Part 15 Rules are adhered to when measured at the edge of the campus.… … Wikipedia
Carrier recovery — A carrier recovery system is a circuit used to estimate and compensate for frequency and phase differences between a received signal s carrier wave and the receiver s local oscillator for the purpose of coherent demodulation. Example of QPSK… … Wikipedia
Electric power transmission — Electric transmission redirects here. For vehicle transmissions, see diesel electric transmission. 400 kV high tension transmission lines near Madrid Electric power transmission or high voltage electric transmission is the bulk transfer of… … Wikipedia
Carrier Strike Group Eleven — crest Active 1 October 2004 to date.[1] … Wikipedia
Smart power grid — Smart Grid is a transformed electricity transmission and distribution network or grid that uses robust two way communications, advanced sensors, and distributed computers to improve the efficiency, reliability and safety of power delivery and use … Wikipedia
Carrier Air Wing Eleven — Infobox Military Unit unit name= Carrier Air Wing Eleven caption= CVW 11 Insignia dates= 27 October 1942 Present country= United States allegiance= United States of America branch= United States Navy type= Carrier Air Wing role= size= command… … Wikipedia
Communication Moon Relay — For the moon bounce children s entertainment inflatable, see moonwalk (bounce house). Sailors on board the USS Hancock (CV 19) spelling out Moon Relay. This picture was transmitted via moon bounce as part of the official Navy… … Wikipedia
