powerline communication full report
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21-01-2010, 12:32 AM



.doc   powerline communication seminar report.doc (Size: 138 KB / Downloads: 1,376)
ABSTRACT
Power Line Communications (PLC) allows transmission of data over power lines. PLC is potentially the network with the deepest capillarity in the world, since power lines are almost ubiquitous. Powerine communications is a rapidly evolving market that utilizes electricity power lines for the high-speed transmission of data and voice services. PLC works by transmitting high frequency data signals through the same power cable network used for carrying electricity power to household users. Such signal cannot pass through a transformer. This requires devices ("outdoor devices") that combine the voice and data signals with the low-voltage supply current in the local transformer stations to bridge the last mile. In the house, "indoor devices" (adapters) are used in order to filter out the voice and data signals and to feed them to the various applications (e.g. PC/Internet, telephone, etc.). The technology has roots going back to the 1940s. It has been used by power utilities for simple telemetering and control of electrical equipment in their networks. What is new is the integration of activities outside the building with those inside the building at a much higher bandwidth, 2.5 mbps or higher “ this means voice and data transmission via the mains supply voltage network right through to every power socket in the building, as well as in the reverse direction at high speed.

Introduction
Connecting to the Internet is a fact of life for business, government, and most households. The lure of e-commerce, video on demand, and e-mail has brought 60 million people to the Internet. Once they get to the Internet, they find out what itâ„¢s really like. That includes long waits for popular sites, substantial waits for secure sites, and horrible video quality over the web. Telephone companies have offered high bandwidth lines for many years. For the most part, the cost of these lines and the equipment needed to access them has limited their usefulness to large businesses. The lone exception has been ISDN (Integrated Services Digital Network) which has won over some residential customers. ISDN offers fast Internet access (128k) at a relatively low cost. Here the solution is Powerline communications (or PLC). Powerline communications is a rapidly evolving market that utilizes electricity power lines for the high-speed transmission of data and voice services. None of the available Internet access services offer the right balance of cost, convenience, and speed. Digital Powerline technology could change all that. It gives customers high speed Internet access through electrical networks. Lower costs are achieved because the service is implemented on standard electrical lines. The service is also convenient because itâ„¢s already in your home. Internet access through Digital Powerline would be at (at least) 1Mbps, 20 times faster than a standard phone/modem connection.
History
The technology has roots going back to the 1940s.It has been used by power utilities for simple telemetering and control of electrical equipment in their networks. What is new is the integration of activities outside the building with those inside the building at a much higher bandwidth, 2.5 mbps or higher.
Overview of Technology
PLC works by transmitting high frequency data signals through the same power cable network used for carrying electricity power to household users. Such signal cannot pass through a transformer. This requires devices that combine the voice and data signals with the low- voltage supply current in the local transformer stations. The signal makes its way to neighborhoods and customers who could access either it wirelessly, through utility poles.
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jai143
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#2
05-02-2010, 07:53 PM

hi friends any body have the documentation of the topic is A SOLUTION TO REMOTE DETECTION OF ILLEGAL ELECTRICITY
USAGE VIA POWER LINE COMMUNICATIONS


plz send me the datails plllllzzzzzzzz
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05-02-2010, 08:26 PM

please ask here seminar and presentationproject and implimentationsnewthread.php?fid=29 for getting SOLUTION TO REMOTE DETECTION OF ILLEGAL ELECTRICITY USAGE VIA POWER LINE COMMUNICATIONS documentation,

discussion of different topic in one page is not favorable.....
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07-06-2010, 01:05 PM

please read topicideashow-to-broadband-over-power-line-bpl and topicideashow-to-powerline-communication-full-report for getting report and presentation of the topic powerline communication
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18-08-2010, 11:18 AM

Hi, this pdf will also be of help in preparing report of this topic:

.pdf   PowerlineCom.pdf (Size: 741.41 KB / Downloads: 515)

power theft identification related topic is available here:
topicideashow-to-microcontroller-based-power-theft-identification-download-full-seminar and presentation-report
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28-09-2010, 05:34 PM


.doc   Powerline ommunication.doc (Size: 135 KB / Downloads: 156)
ABSTRACT


Connecting to the Internet is a fact of life for business, government, and most households. The lure of e-commerce, video on demand, and e-mail has brought 60 million people to the Internet. Once they get to the Internet, they find out what it’s really like. That includes long waits for popular sites, substantial waits for secure sites, and horrible video quality over the web.

Telephone companies have offered high bandwidth lines for many years. For the most part, the cost of these lines and the equipment needed to access them has limited their usefulness to large businesses. The lone exception has been ISDN (Integrated Services Digital Network) which has won over some residential customers. ISDN offers fast Internet access (128k) at a relatively low cost.

Here the solution is Powerline communications (or PLC). Powerline communications is a rapidly evolving market that utilizes electricity power lines for the high-speed transmission of data and voice services.

None of the available Internet access services offer the right balance of cost, convenience, and speed. Digital Powerline technology could change all that. It gives customers high speed Internet access through electrical networks. Lower costs are achieved because the service is implemented on standard electrical lines. The service is also convenient because it’s already in your home. Internet access through Digital Powerline would be at (at least) 1Mbps, 20 times faster than a standard phone/modem connection.

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#7
29-09-2010, 03:29 PM

hi, i want to know more about this plc. plz reply..
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30-09-2010, 06:14 PM

@jai143: Visit this thread for more details on the topic:A solution to remote detection of illegal electricity usage via power line communication:
topicideashow-to-a-solution-to-remote-detection-of-illegal-electricity-usage-via-power-line-communicat
scribddoc/13080527/A-Solution-to-Remote-Detection-of-Illegal-Electricity-Rahul-Raj
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12-10-2010, 03:36 PM


.rar   PLC Report (1).rar (Size: 856.78 KB / Downloads: 194)
Power Line Communication

ABSTRACT
The project and implimentation titled ‘Power Line Communication’ is aimed to transfer data through 230V ac supply line using power line communication modem interfaced with an embedded microcontroller. The supply voltage of the 230V ac line, the current consumption of the load and the power consumed by the load at the transmitter end and the number of units measured are the parameters that are communicated between the transmitter and receiver.
The project and implimentation consists of two major units namely
1. Data Transmission unit.
2. Data Receiver unit.
In the power unitization unit the 230V ac supply line is directly connected to the single phase bidirectional power/ energy chip and a load is connected across its input to obtain the RMS voltage reading. A current transformer is connected to obtain the RMS current reading. The chip generates pulses, the rate of which depends on the capacity of the load. These pulses are read by the microcontroller as an external interrupt. Power is calculated by the number of pulses generated for a user defined time. From power calculation voltage and current reading are read by the microcontroller.
The voltage, current, the counted pulses and the amount of power drawn by the load can be monitored at the LCD at the receiver unit. These parameters are transmitted by a modem through the ac power supply line.

The Basic firmware (software for microcontroller) is written in C language and compiled using C compiler (Codevision). The compiler produces the final machine code of the program and it is stored in the Flash memory of microcontroller.
At the power distribution unit the parameters that are transferred through the ac supply line are decoded by the modem and read by the microcontroller interfaced with the modem and displayed at the LCD. The data communication does not require any protocol and hence is protocol independent. The rate of data transfer is 300bps and the modem is equipped with AC coupling circuit which provides high noise immunity and reliable data communication.
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19-10-2010, 10:40 AM


.doc   PLC-Power Line Communications.doc (Size: 52 KB / Downloads: 69)
This article is presented by:
S.Siddarth – IIIrd Year CSE
B.Santosh – IIIrd Year IT
Power Line Communications


ABSTRACT
Broadband power line (BPL) is the term coined by the FCC for new modems (BPL modems) used to deliver IP-based broadband services on electric power lines. On April 23, 2003, the FCC adopted a Notice of Inquiry (NOI), expressing enthusiasm about the potential of the BPL technology to enable electric power lines to function as a third wire into the home, and create competition with the copper telephone line and cable television coaxial cable line. The FCC said that BPL service can be offered now using BPL modems that comply with existing FCC Rules. However, the FCC also asked whether changes to its rules are needed, either to remove unnecessary barriers to BPL service or to protect other devices from interference from BPL modems. BPL modems use silicon chips designed to send signals over electric power lines, much like cable and DSL modems use silicon chips designed to send signals over cable and telephone lines. Advances in processing power enable new BPL modem chips to overcome difficulties in sending communications signals over the electric power lines that could not be overcome with less computing power. BPL modem speed, like cable and DSL modem speeds, is changing rapidly with each advance in new technology, so it would be difficult to make any generalization here that would be accurate or timely. The FCC NOI discusses two types of BPL, In-house BPL and Access BPL.
Introduction
In-house BPL is a home networking technology that uses the transmission standards developed by the Home Plug Alliance. Products for in-home networking using the electric outlets in your home (or office) are available in stores now. In-house BPL products can comply relatively easily with the radiated emissions limits in Part 15 of the FCC's Rules, because the products connect directly with the low voltage electric lines inside your home or office. In-home networking, while exciting and innovative, is not a major policy concern for the FCC. What the FCC is really wrestling with is how to get broadband Internet access over "the last mile" to the home.
Access BPL is a new technology to carry broadband Internet traffic over medium voltage power lines. BPL modems that electric utilities and their service partners can install on the electric distribution network also are available now. Medium voltage power lines are the electric lines that you see at the top of electric utility poles beside the roadways in areas that do not have underground electric service. Typically there are three electric lines (called phases A, B and C), each carrying several thousand volts. One phase is usually enough to power the houses on a residential street, two or even three phases can be joined together to power the big electric motors in an industrial or commercial area. (You also may see a fourth wire that is the ground wire.)
Inductive couplers are used to connect BPL modems to the medium voltage power lines. An inductive coupler transfers the communications signal onto the power line by wrapping around the line, without directly connecting to the line. A major challenge is how to deliver the signal from the medium voltage line to the low voltage line that enters your house, because the transformer that lowers the electric power from several thousands volts down to 220/110 is a potential road block to the broadband signal. Several methods are now available that successfully solve this problem.
Interference issues between unlicensed devices, including BPL modems, and other electronic devices are governed by Part 15 of the FCC's Rules. All electronic devices sold in the U.S. have to meet FCC radio frequency (RF) emissions limits. When BPL modems are installed on underground electric lines, the communications signal is shielded by the conduit and the earth and as a result is unlikely to cause interference to other communications services. The FCC is more concerned about the interference potential of BPL signals transmitted on exposed, overhead medium voltage power lines.
Public comment responding to the NOI on BPL is invited by the FCC, both from the proponents of the new BPL service, i.e., electric utilities and BPL vendors, as well as those who might be impacted by the BPL signals. For example, on most electric utility poles you will notice that below the four electric utility lines there is a lower segment of the pole where telephone and cable television wires are attached (referred to as the communications space). One of the questions the FCC asks is whether radiated signals from access BPL systems on the electric power lines would interfere with signals on the cable and telephone lines, and vice versa. We can expect a lively debate in the comments filed in response to the NOI on this issue, since the parties involved are competing for the same customers.
A more intelligent electric power grid. Speaking of competitors, why should we care about any of this when 3G wireless cellular telephone networks, wireless in-home networking and Wi-Fi hotspots claim to have the answer to delivering broadband to everyone? Electric utilities are not just looking at BPL as a way of entering the communications business. In fact, they may want to leave that part of BPL to a partner, perhaps an ISP, a CLEC or a long distance company looking for an alternative last mile path to their customers. Electric utilities are interested in BPL because it can give them an intelligent electric distribution grid. This could result in lower electric power costs, less pollution and greater reliability and security.
A better connected appliance. What's interesting about BPL is that every electric device is connected to the electric distribution network. Potentially then, BPL could let chips in every electric device talk to each other. Could we put a Wi-Fi, Blue Tooth or other wireless chip in every appliance? Yes - but BPL may be a better solution. Those who had PC's before the Internet exploded remember the difference in functionality between a standalone PC and a networked PC. Networking every electric device together over the power lines might result in a similar growth in productivity and convenience for your home and office.


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29-12-2010, 02:07 PM



BY:
Mutasim Ahmed
Mohamed Omer

.docx   PLC+PIC.docx (Size: 21.69 KB / Downloads: 135)

Introduction
Power line communication (PLC) is a technology that employs the infrastructure of electrical power distributed system as communication medium. PLC technology could provide the consumer with a spectrum of services such as internet, home entertainment, home automation, and enable the electricity supply authority to efficiently mange their distribution networks in a competitive manner.
This technique has immediate attraction for meter communication system, since every consumer is connected to the communication network and that network is owned and controlled by the electricity supply authority. In a meter reading communication system high power signals are transmitted through the network, which are then received by all connected meters.

The proposed PLC transmitter is shown in Figure 1 and consists of the microcontroller which is used as a data source and data synchronizer, an OOK modulator, a power amplifier and an interfacing circuit. A level converter (an operational amplifier which works as a simple comparator) is used to convert data levels between the PIC and the OOK modulator.

In the proposed PLC receiver, the received signal is first amplified using a preamplifier. Then the amplified signal is entered to the OOK demodulator, which recovers the original data. The received data is then passed to the microcontroller which converts serial data into parallel data. An interfacing circuit similar to the interfacing circuit used the transmitter is used to isolate the receiver from the 220 V/50 Hz environment. Figure 2 shows a block diagram of the proposed PLC receiver.


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13-05-2011, 11:23 AM

Presented By :
Rishi Sachan


.pptx   Power Line Communication.pptx (Size: 600.63 KB / Downloads: 91)
Power Line Communication
What is PLC?
PLC – Powerline Communications
Using powerline as transmission medium for data communication
It uses the existing power lines to transmit data from one device to another.
This makes power line communication one of the best means for networking
History of PLC
-From high voltage (HV)low voltage (LV)
-Low data ratehigh data rate
-Control applicationmultimedia data applications
Motivation
-Cheap “the last mile” solution
-However, worse channel than other wired network
-Channel characterizationreliable communications
Three network levels
High voltage (110–380 kV)
Medium voltage (10–30 kV)
Low voltage (230/400 V, in the USA 110 V)
Efficient coupling
Inductive coupling
Conductive coupling
Modulation and error correction
OFDM, DMT
CDMA
FEC
How PLC works?
It operates by impressing a modulated carrier signal on the wiring system.
Data rates over a power line communication system vary widely.
BroadBand through PLC
High speed connection to internet
-Greater than 128kbps
-Always on!
-Simultaneous up-link and down-link communication
Leading broadband access technologies
-xDSL,cable,satellite,ISDN digital modems
Basic BPL System
BPL Injector
BPL Repeater
In-home PLC
PLC Network
Noise to signal ratio
Electro Magnetic Control
Wide Band modulations
-The signal is spread over a wide bandwidth instead of being concentrated at a strong single carrier.
-This means that power spectral density is lower than with single carrier modulation,reducing the possibility of interfering other users of spectrum.
Adaptive transmission power
-PLC technology can have an adaptive transmission power,so that the system only injects the minimum signal level required to achieve the desired performance level.
-Equipment is typically transmitting with much less power than nominal level,thus reducing any potential emissions to a minimum.
Major PLC providers
PLC access technology roadmap
Features of PLC & its future
Powerline communication improves customer experience
-easy to use ,just plug it in and its connected.
-no coverage problems due to walls.
-no need for new wires.
-no antennas(psychological factors)
-Ubiquitous – works in every plug.
-Low Cost
-High Speed: up to 200mbps
-High synergies with other technologies(WLAN,BLUETOOTH,DSL,Cable)
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19-07-2011, 03:36 PM


.doc   powerline communication.doc (Size: 130 KB / Downloads: 72)
1.0.0 Introduction
Connecting to the Internet is a fact of life for business, government, and most households. The lure of e-commerce, video on demand, and e-mail has brought 60 million people to the Internet. Once they get to the Internet, they find out what it’s really like. That includes long waits for popular sites, substantial waits for secure sites, and horrible video quality over the web.
Telephone companies have offered high bandwidth lines for many years. For the most part, the cost of these lines and the equipment needed to access them has limited their usefulness to large businesses. The lone exception has been ISDN (Integrated Services Digital Network) which has won over some residential customers. ISDN offers fast Internet access (128k) at a relatively low cost.
Here the solution is Powerline communications (or PLC). Power line communications is a rapidly evolving market that utilizes electricity power lines for the high-speed transmission of data and voice services.

None of the available Internet access services offer the right balance of cost, convenience, and speed. Digital Powerline technology could change all that. It gives customers high speed Internet access through electrical networks. Lower costs are achieved because the service is implemented on standard electrical lines. The service is also convenient because it’s already in your home. Internet access through Digital Powerline would be at (at least) 1Mbps, 20 times faster than a standard phone/modem connection.
1.1.0 History
The technology has roots going back to the 1940s.It has been used by power utilities for simple telemetering and control of electrical equipment in their networks.
What is new is the integration of activities outside the building with those inside the building at a much higher bandwidth, 2.5 mbps or higher.
1.2.0 Overview of Technology
PLC works by transmitting high frequency data signals through the same power cable network used for carrying electricity power to household users. Such signal cannot pass through a transformer. This requires devices that combine the voice and data signals with the low-voltage supply current in the local transformer stations. The signal makes its way to neighborhoods and customers who could access either it wirelessly, through utility poles.
Digital Powerline use a network, known as a High Frequency Conditioned Power Network (HFCPN), to transmit data and electrical signals. A HFCPN uses a series of Conditioning Units (CU) to filter those separate signals. The CU sends electricity to the outlets in the home and data signals to a communication module or "service unit". The service unit provides multiple channels for data, voice, etc. Base station servers at local electricity substations connect to the Internet via fiber or broadband coaxial cable. The end result is similar to a neighborhood local area network.
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07-02-2012, 03:47 PM

POWER LINE COMMUNICATION


.pptx   POWER LINE COMMUNICATION.pptx (Size: 1.11 MB / Downloads: 60)

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




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05-12-2012, 05:49 PM

powerline communication




.ppt   Power Line Communication.ppt (Size: 1.81 MB / Downloads: 22)

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.
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