利用低压电力线传输数据存在的技术问题及对策  

EXISTING TECHNICAL PROBLEMS IN DATA TRANSMISSION BY LOW-VOLTAGE POWER LINE AND THEIR COUNTERMEASURES

作　　者：郑涛[1] 张保会[1] 

机构地区：[1]西安交通大学电力工程系,陕西省西安市710049

出　　处：《电网技术》2004年第22期44-47,共4页Power System Technology

摘　　要：低压电力线通信可分为远程抄表和实现高速Internet接入网两个主要应用方向。文章根据电力线信道的特性以及低速和高速信息传输的不同要求,指出对于数据传输速率较低的远程抄表系统可使用时分复用的扩频调制技术,但要注意选择合适的载波频率和扩频伪随机序列;高速Internet接入网则适合应用正交频分复用调制技术(OFDM),以克服低压电网对信号传输的不利影响,如噪声大、衰减强特点等。Low voltage power line communication has two main application fields, one is automatic meter reading system using power line carrier and the other is high speed connection with Internet. According to the channel characteristics of power line and different requirements to low-speed and high-speed transmission of informations, the authors proposed that the Time Division-Spread Spectrum (TD-CDMA) is suitable for remote meter reading system with low data transmission rate, but special attention should be paid to the selection of proper carrier frequency and the pseudo-random sequence in the spread spectrum, the Orthogonal Frequency Division Multiplexing (OFDM) is suitable for high speed connection with Internet in order to weaken the effects of power line on transmitted signal, such as high noise level and strong attenuation, etc.

关 键 词：INTERNET接入 伪随机序列 载波频率 扩频调制 OFDM 正交频分复用 高速 电力线信道 低压电力线 远程抄表系统 

分 类 号：TM73[电气工程—电力系统及自动化] TM933.4