Brief introduction to the background of PLC power line communication technology

电力线 通信技术（Power Line Communication）简称PLC技术。其基本原理是指利用现有的电力网，高速传输数据、语音、图 象等多媒体业务信息，即把载有信息的信号加载于电力线传输，接收信息的调制解调器再把信号从电力线中通过耦合方式提取出来 ，并传送到计算机等通信设备，以实现信息的传递。

Power line communication technology (Power Line Communication) referred to as PLC technology. The basic principle is the use of the existing power grid, high-speed transmission of data, voice, image and other multimedia information, which contains information on the signal loading power line transmission, receiving information to extract the signal from the modem power line by way of coupling, and transmitted to the computer and communications equipment, in order to transmit information.

按照PLC通信技术的发展和应用，PLC技术可应用在高压输电网（35kV 以上）、中压输电网（10kV-35kV）以及低压配电网(10kV以下)等各个领域，或者更细化为家庭低压配电网领域中的应用。在不同的应用领域，PLC有不同的技术标准，规范和设计要 求。

According to the development and application of PLC communication technology, PLC technology can be used in high voltage transmission network (35kV), medium voltage power transmission network (10kV-35kV) and low voltage power distribution network (10kV) and other fields, or more detailed application areas for the family in low voltage distribution network. In different application areas, PLC has different technical standards, specifications and design requirements.

目前关于电力线通信的标准主要有三家，分别是家庭插电联盟 （HomePlug Association, HPA）,代表性厂家是Intellon；通用电力线联盟 (Universal Powerline Association, UPA)代表性厂家是 DS2，以及消费电子电力线通信联盟(CE- Powerline Communication Alliance, CEPCA)，主要代表性厂家是panasonic。这三家标准的产品都已经广泛应用于欧洲，北美以及亚 洲的日，韩等发达国家。

The power line communication standard are mainly three, namely powerpacket (HomePlug Association, HPA), the representative manufacturers is Intellon; the uPA (Universal Powerline, Association, UPA) representative is DS2 and consumer electronics manufacturers, Power Line Communications Alliance (CE- Powerline Communication Alliance, CEPCA). The main representative is Panasonic manufacturers. These three standard products have been widely used in Europe, North America and Asia, Japan, Korea and other developed countries.

电力线通信技 术的发展，经历了比较长的一段时间，通过对电力线环境通信状况的不断实践和对通信编码算法以及调制方式的优化，使得 数据传输 速 率不断提高 ，经历了 由 14Mbps, 85Mbps、200Mbps，以及后续更高的700Mbps和1Gbps。抗干扰能力不断增强，稳定性得到了很大的提高。在制定HomePlug 1.0标准的过程中，HomePlug输电线联盟进 行了广泛的实地试验。在美国和加拿大的500多个家庭测试了新标准。结果表明，新标准能够适合98%的家庭电气插座。提供98%以 上的覆盖率，消费者应该对基于这个标准的产品感到满意了。新标准打消了人们对输电线联网可行性的顾虑。

The development of power line communication technology, has experienced a long period of time, through constant practice of power line communication status and the communication encoding algorithm and the optimization of modulation, the data transmission rate increasing, experienced by 14Mbps, 85Mbps, 200Mbps, and the subsequent higher 700Mbps and 1Gbps. The anti-interference ability is enhanced and the stability is improved greatly. In the process of developing the HomePlug 1 standard, the HomePlug transmission line alliance conducted extensive field tests. More than and 500 families in the United States and Canada tested the new standards. The results show that the new standard can be suitable for 98% of household electrical sockets. With more than 98% coverage, consumers should be satisfied with the products based on this standard. The new standard to dispel people‘s concerns about the feasibility of power transmission network.

以下以HPA标准为例，对PLC技术的多项指标进行描述。

The following HPA standard as an example, PLC technology to describe a number of indicators.