电力线通信(PLC)是一种通过现有电力线传输数据,可让电力线用于数据通信的技术。 通过使用电力线作为通信网络,可在初期以低成本建立系统。 因此,PLC 作为实现智能社会的智能电表 (AMI)、HEMS、BEMS 和太阳能电池板监控系统的通信而备受瞩目。 目前存在“低速”的和“高速” PLC的版本,每个版本使用不同的通信协议。 此外,通过改变外围电路,可以使 AC 和 DC 电源在同一设备上兼容。 瑞萨电子专注于连接能力,提供的产品支持用于楼宇自动化应用的低速 PLC。

电力线通信 (PLC) 解决方案

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