Powerline Telecommunication

Project and Seminar Material For Electrical Electronics Engineering EEE

Project and Seminar Material For Electrical Electronics Engineering EEE


Abstract


The Power Line technology has received an increasing attention in the last decades due to its inherent benefits, mainly related to the reduction of cabling and associated costs. Power Line Communication (PLC) was first employed in power utilities and since the 80s in home automation, too.

However, its use in the automotive field received relatively little attention. This seminar paper revisits the related work in using PLC technology for communication. Then, it focuses on the issues that need to be addressed when introducing the PLC in the automotive domain.

The final goal of this work is to carry out a practical assessment of the PLC technology in the referred domain that may open the way for future use in industrial scale.


Table Of Contents


Preliminary Page(s)

  • Title Page
  • Certification Page
  • Dedication
  • Acknowledgement
  • Abstract
  • Table Of Contents

Chapter One

1.0 Introduction


Chapter Two

2.0 Literature Review

  • 2.1 Background Of The Study
  • 2.1 Concept Of Powerline Telecommunication
  • 2.3 Long Haul, Low Frequency
  • 2.4 Home Control (Narrowband)
  • 2.5 Low-Speed Narrow-Band
  • 2.6 Medium-Speed Narrow-Band
  • 2.7 Advantages And Disadvantages Of Power Line Communication
  • 2.8 Powerline As A Successful Educational Tool

Chapter Three

3.0 Applications Of Powerline Technology

  • 3.1 Plc And Automotive
  • 3.2 Technical Challenges In Powerline Telecommunication Utilization
  • 3.3 Standards And Regulations

Chapter Four

4.0 Conclusion and Recommendation

  • 4.1 Conclusion
  • 4.2 Recommendation
  • References

Chapter One


1.0 Introduction

Power Line Communication (PLC) aims at exploiting the power supply line to send/receive information without using separate dedicated wires. The PLC is nowadays adopted in many application domains, like power utilities to interconnect and control faraway units, automatic remote meter reading, and home and building automation. The latter is, perhaps, the most promising field for PLC due to the large number of potential customers. Indeed it seems a natural way to connect intelligent home devices like lights, doors and household appliances, to a home control unit. In this field a number of widely adopted communication protocols have been developed, starting from the low speed low cost X10 technology up to recent implementations like Home Plug (Anderson,1998) which is also targeted to high speed communication, in order to support High Definition TV and VoIP.The PLC technology can be classified with respect to the transmission frequency, which determines, in turn, the transmission bitrate. Low frequency transmission is well regulated in Europe, with a band range from 3 up to 148,5 kHz, and a maximum bitrate of 1 Mbps.

Regulation for larger transmission range is ongoing (CENELEC SC205A WG10), allowing for operation up to 30 MHz, and higher bitrate (up to 200 Mbps); a number of devices and technologies are already available on the market. A common feature of these applications is that the power carrier is AC 50/60 Hz at medium (power utilities) or low voltage (110 and 220 V for home). Conversely, in specific cases, such as the automotive domain, the powerline operates at lower DC voltage complying with batteries and electronic devices (e.g. 3.3, 5, 9, 12 and 42 V), which implies a different coupling technology.

Two key aspects drive the research on PLC: (i) physical transmission of the modulated signal and (ii) the data link and upper layers to allow the correct communication among devices. The former issue is related to the study of the noise and compatibility on the PLC line, which is prone to interference due to non-linear loads that can, for example, show impulsive behaviors (i.e., when a motor is switched on). The latter issue determines the flexibility and re-configurability available during the application design, set up and management. It also addresses the communication determinism in terms of guaranteeing the communication timing constraints, i.e., periodic transmission, end-to-end message deadlines, etc.When looking at a potential automotive application there are a number of issues that PLC technology should address (Clark,1998). In fact, the automotive communication technologies used today are likely to impose requirements on the PLC technology proposed for automotive usage. There are two scenarios to explore: (1) providing a different communication system with respect to the current technologies used in existing automotive systems. In this case, it is important to provide adequate bandwidth, re sponsiveness, tolerance to EMI etc. (2) providing a physical replacement of existing field buses that is transparent at the application level. In this case, the PLC should provide a similar, or the same, temporal behaviour as the original bus.The idea of using the power line as a communications path has been explored for decades with varying success. With new standards and technologies, it’s an even better choice than it was before. In fact, multiple chip and equipment vendors have adopted PLC

PLC (Power Line Communications) technology uses the existing public and private mains power wiring for the transmission of telecommunication signals, offering Internet access via electrical networks in the home and at work.

The areas of developing data transmission solutions via powerlines include outdoor (local loop) and in-house (home networking) solutions.

The obvious advantage of PLC is that it is everywhere in the developed world. PLC can deliver high speed, low cost Internet access with ‘no new wires’, as well as the capability for in-building Local Area Networks.

Deregulation has been a major factor in the development of Powerline (tele) communications:

  • Deregulation in telecommunications allows new market entrants to provide services along electricity networks
  • Deregulation in the power supply sector increases the demand for specific energy distribution related information systems.

Another opportunity for Powerline technology has been in the area of home-automation and in-house systems


Chapter Four


4.0 Conclusion and Recommendation

4.1 Conclusions

The use of PLC in utilities, home and building automation is already common place. However, we believe that PLC can also be very beneficial in the automotive domain, as a substantial mean to reduce cabling. Today, the communication in the automotive domain is dominated by widely available and robust solutions like LIN, CAN, and FlexRay. Therefore, an approach based on PLC must be comparable with those solutions in key aspects like reliability, bandwidth and latency.


4.2 Recommendation

PLC is actually a generic term for any technology that uses the power line as a communications channel.As such, PLC actually comprises several standards focusing on different performance factors and issues relating to particular applications and operating environments. Two of the most well-known are G3 and PRIME. In general, across multiple standards, G3 or its cousin IEEE P1901.2, focus more on robustness. Given the varied environments in which PLC can operate and the different kinds of interference present in them, the robustness of G3 to withstand noise often makes it a more compelling choice for worldwide deployments.


Powerline Telecommunication


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