電力線通信(PLC)是一種通過現有電力線傳輸數據,可讓電力線用于數據通信的技術。 通過使用電力線作為通信網絡,可在初期以低成本建立系統。 因此,PLC 作為實現智能社會的智能電表 (AMI)、HEMS、BEMS 和太陽能電池板監控系統的通信而備受矚目。 目前存在“低速”的和“高速” PLC的版本,每個版本使用不同的通信協議。 此外,通過改變外圍電路,可以使 AC 和 DC 電源在同一設備上兼容。 瑞薩電子專注于連接能力,提供的產品支持用于樓宇自動化應用的低速 PLC。

電力線通信 (PLC) 解決方案

PLC

AC-PLC needs trans to remove AC.

AC-PLC

DC-PLC can be removed by capacitance coupling. External circuit costs are potentially less expensive.

DC-PLC


Strengthening Internal Building Communication Networks and Related Issues

A variety of communication networks are used by the systems in a typical building, such as HVAC (Air Conditioning), fire and safety, building security, and lighting. Also in use are information gathering (sensing) functions to provide safety, security, and comfort, and this further increases the volume of data to be handled. Renesas PLC technology provides the means to solve issues such as the following.

Strengthening Internal Building Communication Networks and Related Issues

Connectivity Technology That Solves a Variety of Problems

Renesas PLC devices eliminate a variety of issues by reducing cable installation while providing high speed and high reliability. This technology allows power lines to be used as communication lines for transmitting sensor data, audio data, and more.
Features of Renesas PLC include:

  • Ability to use power lines as communication lines, reducing or eliminating cable installation.
  • Multicarrier modulation (OFDM) for high-speed and robust communication.
  • A variety of error detection and correction functions for high reliability.
  • DSP-based software modem easily accommodates updates to support different standards or boost performance.

No expensive wiring, such as shielded or twisted-pair cables, is needed, and this contributes to more compact housings and reduced cost. There is no need to worry about issues such as increased complexity and the need for additional wiring to accommodate the increase in various types of information collection and use of sensors, and it is not necessary to install cables when building a new communication network. Some building automation application examples are shown below.

Multicarrier modulation (OFDM) for high-speed and robust communication

?

PLC data transfer does not use subcarriers (tones), which perform poorly when the state of the communication line is poor due to high noise levels, etc. Better communication performance (reduced errors)


Example of Use of Power Lines as Communication Lines for an HVAC (Building Air Conditioning) System

Example of Use of Power Lines as Communication Lines for an HVAC (Building Air Conditioning) System

Example of Use of Power Cables as Transfer Routes for Audio Data

Example of Use of Power Cables as Transfer Routes for Audio Data