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Topic: Power line communication

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Power line

Electric power transmission

FACTS (Electric power transmission)

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HomePlug powerline alliance

HVDC

Distributed generation

Electricity distribution

Optical fibre

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Analogue signal

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Broadband

BPL

	Power line communication while avoiding determinable interference harmonics - Patent 5404127
		The power line communication (PLC) apparatus as claimed in claim 1 wherein said waveshaping memory further comprises means for storing a digital representation of a carrier signal for avoiding said interference harmonics in NTSC television receivers.
		The power line communication (PLC) apparatus as claimed in claim 1 wherein said filter means includes a pair of low pass filter circuit wherein each of said filter circuit for attenuating a predetermined frequency associated with said interference harmonics.
		A power line communication (PLC) apparatus is described wherein a carrier is derived to avoid determinable interference harmonics.
	www.freepatentsonline.com /5404127.html (6110 words)

	Power Line communication, PLC Communication
		The fact is that the power line is an extremely difficult and noisy communications medium, characterized by several unpredictable and strong forms of interference.
		PLC opens a whole new world of business opportunities to appliance and electric devices manufacturers, utilities and service providers, with no need to run and install new cables or jacks.
		Power line communication and networking provides the benefits of having a wired connection while maintaining the flexibility of ubiquitous connection.
	www.yitran.com /a_plc.htm (307 words)

	Power line communication - Wikipedia, the free encyclopedia
		Typically home-control power line communications devices operate by injecting a carrier wave of between 20 and 200 kHz into the household wiring at the transmitter.
		PLC modems transmit in medium and high frequency (1.6 to 30 MHz electric carrier).
		Power lines are unshielded and will act as transmitters for the signals they carry, and have the potential to completely wipe out the usefulness of the 10 to 30 MHz range for shortwave communications purposes.
	en.wikipedia.org /wiki/Power_line_communication (4105 words)

	Power Line Communication - A powerful and cheap medium for broadband access (Site not responding. Last check: 2007-11-02)
		Infrastructure in the shape of a power line already exists and the technology has been so highly developed that it is possible to connect to the broadband from each power point in a building.
		PLC is the access net that starts at the ”last” power line station, closest to the building, i.e.
		Power line communication is considered to meet the future demands on broadband capacity.
	www.energyforum.net /feature/feat88.shtml (874 words)

	Kinectrics - KINECTS® Power Line Communication Technology
		Power Line Communication (PLC) is a rapidly emerging technology providing communication links over existing power transmission and distribution networks.
		Most currently available PLC technologies are not able to send and receive data signals through the local distribution transformers.
		Simply plugging it into a regular electrical outlet not only provides power to the unit, but also connects it to the power lines, which it uses to send and receive data signals.
	www.kinectrics.com /en/TechProfiles/KinectsPLC.html (516 words)

	MainNet's Power Line Solution... (Site not responding. Last check: 2007-11-02)
		The German power utility in Mannheim, MVV, is now offering its customers the opportunity to receive Broadband services at home, on line, 24 hours a day, via the power lines.
		Power utilities are now able to capitalize on their existing powerline infrastructure, their vast customer install base and their extensive name branding.
		Plus PLC services are being offered by MVV in a variety of competitively priced packages, thus adding to an already strong customer interest gained by the simplicity of the system, the fact that no additional wiring is necessary, and that the service is available at any location in the home, 24 hours a day.
	www.mainnet-plc.com /pr_powerlinesolution.htm (626 words)

	Power line communication systems (US5952914)
		Each channel is coupled to a power line using a hybrid line driver/receiver device.
		The hybrid line driver/receiver device includes an echo canceller and a bridge circuit to allow transmitting and receiving signals to and from a single power line with minimized echoing effects.
		Thus, the communication capacity of power line communication systems is greatly increased compared to that for a single 2-wire channel.
	www.delphion.com /details?pn10=US05952914 (485 words)

	power line carrier communication
		Since these wires are owned by the power distribution company or ministry, you should inquire of them about permission to use them and what frequency and power limitations you will be held to.
		As Flatulent points out - the power lines are not public property in the sense that you can use them as you please.
		Furthermore, most of today's powerline communication methods involve high frequency up to ultra high frequency RF that can interfere with other systems including firefighting, emergency medical, military, etc. You need to talk with your local service providers and see what their concerns might be.
	www.edaboard.com /ftopic84288.html (284 words)

	Power Line Communication Applications
		Enel, the largest electric utility in Italy, is deploying Echelon's power line signaling technology in digital meters in over 27 million homes.
		Power line transceivers signal over twisted-pair cabling between the mainland and telemetry equipment in North Sea oil platforms.
		Our power line signaling technology lets Arbitron base stations and hubs communicate over standard household wiring to transfer data easily and reliably.
	www.echelon.com /products/transceivers/powerline/pltapplications.htm (291 words)

	Successful Demonstration of Automotive High-Speed Power Line Communication Network From Yamar in Ford Booth at Detroit ...
		Innovative power line communication (PLC) silicon devices were used for real-time digital video communication between a camera located at the back of Ford’s SUV vehicle to a remote LCD display unit on the drivers front dashboard - with no extra wiring, using the car DC power line also for communication.
		Yamar’s built-in PLC transceivers are specially designed to overcome the hostile communication environment of the vehicle power lines.
		Yamar developed for in the last 10 years products for communication over noisy battery power lines, addressing the vehicle harness, which is the second heaviest and costly part after the engine in the car.
	www.emediawire.com /releases/2004/10/emw172575.htm (434 words)

	Power Line: On the Legality of the NSA Electronic Intercept Program
		The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
		Section 605 of Title 47, U.S.C., is a general prohibition against publication or use of communications obtained by wiretapping, but we do not read the section as forbidding the President, or his representative, from ordering wiretap surveillance to obtain foreign intelligence in the national interest.
		The defendants raise a substantial challenge to their convictions by arguing that the surveillance conducted by the FBI violated the Fourth Amendment and that all the evidence uncovered through that surveillance must consequently be suppressed.
	powerlineblog.com /archives/012631.php (3605 words)

	SCADA System through Power Line Communication (Site not responding. Last check: 2007-11-02)
		Power line communication really is their main focus and they just developed a new chip that is very flexible.
		While there are some companies still making Power Line Carrier equipment for utilities and many utilities still using it, most new applications are either wireless, fiber-optic, or telephone network (analog, digital, etc) based.
		Utility type power line carrier typically at low bps rates (300 bps) and prone to problems with the equipment that taps into high voltage equipment.
	www.control.com /962987522/index_html (561 words)

	Techno-Utopian Ambrosia
		Just because a house’s power supply carries electricity does not mean it cannot be used to transmit data as well.
		Any house with ordinary power lines has a convenient network of copper wires that runs into every room of the house.
		The problem with power line communication is that while in use it can potentially cause radio interference since it uses untwisted and unshielded wires.
	flaming-shadows.tripod.com /blog/index.blog?entry_id=1134572 (345 words)

	Power Technology - DIMAT - Communications Solutions for Power Utility Companies - Power Line Carrier (PLC), ... (Site not responding. Last check: 2007-11-02)
		We are one of the most important manufacturers of Power Line Carrier (PLC) terminals, teleprotection devices, coupling units for PLC and Power Line Communications, coupling units for PLC narrow band used in Automatic Meter Reading (AMR) as well as alternative communication solutions for the HV and MV lines.
		The new UAM-4 wide-band coupling unit fits a wide range of line impedances and is suitable for phase-to-ground and phase-to-phase coupling.
		The main functions accomplished by UAM coupling units include: tuning of coupling capacitor, impedance matching between power line and PLC equipment, draining to earth of power frequency current, limitation of voltage surges proceeding from the power line and earthing of the coupling device for protection purposes during maintenance operations.
	www.power-technology.com /contractors/tandd/dimat (522 words)

	Successful Display of Yamar High-Speed Power Line Communication in Ford Motor Company Booth at Detroit Convergence 2004 ... (Site not responding. Last check: 2007-11-02)
		Demonstration of high-speed power line communication devices from Yamar were used for communication between camera to a LCD display using existing automotive DC power lines.
		Innovative power line communication devices were demonstrated for camera over automotive DC power lines.
		Yamar developed for more than 10 years products for communication over noisy battery power lines, addressing the vehicle harness, which is the second heaviest and costly part after the engine in the car.
	press.arrivenet.com /autos/article.php/491079.html (414 words)

	Power Linx: Creating Solutions. Connecting the World. Power Line Vision Systems.
		First, the power line technology is significantly easier and quicker to install than existing hard-wired camera alternatives.
		Power line technology is much more secure and reliable than RF wireless camera systems, with RF wireless camera signals being relatively easy to intercept.
		The patent, part of a portfolio of powerline and communication patents, describes the ability to transmit and detect current changes using differential magnetic fields on twisted pair cables.
	www.power-linx.com /news (10958 words)

	Main.net - Power Line Communications, Inc.
		Main.net-PLC is a wholly-owned subsidiary of Main.net Communications, Ltd. We are the market leader in power line communications (PLC) access network solutions in North America.
		The mission of Main.net - PLC is to make broadband over power lines a reality in North America.
		We will accomplish this through a focus on development and implementation of a power line communication (PLC) "last mile" and "last-inch" solution that delivers the bandwidth that customers desire, with a quality of service (QOS) that they expect and at a cost they are willing to pay.
	www.powerline-plc.com /company.asp (539 words)

	RedOrbit - Technology - Unit of Japan Giant NTT to Test Power-Line Communication (Site not responding. Last check: 2007-11-02)
		The move by NTT Advanced Technology Corp. is expected to intensify competition between power companies and telecom carriers in putting PLC into practical use.
		PLC refers to technology that sends data signals over power line, which makes it possible to use power lines at home as a local area network.
		It is capable of transmitting information at a speed of 100 megabits per second, equal to the speed of data communications via fiber optics.
	www.redorbit.com /news/display?id=80441 (197 words)

	Power-line baseband communication system (US4471399) (Site not responding. Last check: 2007-11-02)
		A pulse generator produces digital signals which are limited to a frequency spectrum of 30 kHz to 300 kHz and applied directly, i.e., without modulation, to an electrical power line.
		At the receiving terminal an amplifier compensates for attenuation characteristics of the electrical power line and the received signal is then sampled to extract the information from it.
		When both a baseband digital communication system and a carrier communication system utilize the same electrical power lines, provision is made for interrupting the baseband digital signal to allow communications via the carrier system.
	www.delphion.com /details?pn10=US04471399 (351 words)

	Power Line Transceivers - STMicroelectronics
		After the firsts ST7536 and ST7537 power line modems, new breakthrough transceivers have been realized by exploiting ST sub-micron mixed signal technologies and multi-segments design experience.
		Enel S.p.A., one of the the largest electric utility worldwide has already integrated millions of ST Power Line Transceivers in its digital meters in the Italy power network for remote automatic meter reading and other functions.
		With integrated Analog Front End (AFE) and Power Line Driver, ST7538 and the new ST7540 are nowadays the most integrated Power Line Transceivers available in the market.
	www.st.com /powerline (210 words)

	Power-line internet - Wikipedia, the free encyclopedia (via CobWeb/3.1 planet03.csc.ncsu.edu) (Site not responding. Last check: 2007-11-02)
		It has been suggested that this article or section be merged into Power line communication.
		Power-line internet is a new service still in its infancy that may eventually permit broadband Internet data to travel down standard high-voltage power lines.
		However, the system has a number of complex issues, the primary one being that power lines are inherently a very noisy environment.
	en.wikipedia.org.cob-web.org:8888 /wiki/Power-line_internet (550 words)

	Wireless Networking \| Wireless Phones \| High Speed Internet (via CobWeb/3.1 planet03.csc.ncsu.edu) (Site not responding. Last check: 2007-11-02)
		The concept of wireless certainly is simple enough - use low powered radio waves to transfer information from one point to another.
		If you are looking to compare prices for items other than just electronics, visit dhealio.com.
		The Wireless Foundation was founded in 1996 to promote the utilization of wireless technology to help American communities.
	www.plca.net.cob-web.org:8888 (479 words)

	PowerLine Communication Home Network Technology eLibrary and Products - Powerline Networking - Power Line PLC Powerline ...
		The United Power Line Council (UPLC) forcefully replied to concerns about harmful interference from BPL in reply comments filed today, and urged the FCC to move forward quickly to develop rules that will encourage more development and deployment of BPL services to the public.
		While it is unclear whether broadband over power line (BPL) will be less expensive to set up than cable or digital subscriber lines (DSL), the inquiry offers the promise of a third way to deliver broadband into the home.
		In an unprecedented move of cooperation, the Power Line Communications Association (PLCA) and the United Powerline Council (UPLC) filed a Joint Report with the FCC's Office of Engineering and Technology asking for streamlining and quick resolution of regulatory issues that will greatly assist towards a speedier rollout of second generation power line communications networks.
	www.homeplugandplay.com /index.shtml (1833 words)

	Power line data access reviewed
		In fact, U.S. deployment of PLC (power line communication) technology, which uses modems to send high-frequency analog signals over power lines at electrical substations, could be seen as early as the third quarter of 2002, Libby said.
		In addition, an Amperion device that will reside on a power line and transmit data wirelessly will be tested by AEP in March or April, said Philip Hunt, Amperion's founder and president.
		Despite gains, some feel PLC deployments have been slowed by a lack of standards, but PLC technology is already making headway in Europe.
	www.infoworld.com /articles/hn/xml/02/01/07/020107hnpowerline.html (743 words)

	TechOnline \| ST's Solutions for Power Line Communications
		Particular focus will be given to ST's PLC development kits and reference designs which significantly reduce design time and application cost.
		David holds BSEE and MSEE degrees from the University Louisville and an MBA from Northwestern University and is a 25 year veteran of the Semiconductor and Electronic Design industry.
		He is especially expert in the Power Line Communication system and application field.
	www.techonline.com /learning/webinar/200078 (516 words)

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