《低压电力线载波通信网络结构分析》.pdf

第27 卷 第2 期 电 网 技 术 Vol. 27 No. 2 2003 年2 月 Power System Technology Feb. 2003 文章编号：1000-3673 （2003）02-0058-05 中图分类号：TN913.6; TN915.02 文献标识码：A 低压电力线载波通信网络结构分析 董亚波，高 锋 （浙江大学，浙江省杭州市310027） ANALYSIS OF STRUCTURE OF CARRIER COMMUNICATION NETWORK FOR LOW VOLTAGE POWER LINE DONG Ya -bo, GAO Feng （Zhejiang University, Hangzhou 310027, Zhejiang Province, China ） ABSTRACT: In order to improve the practicability of the low 了很大的发展。但是，由于低压电力线本身最初不 voltage power line carrier communication (PLCC) some high 是为了进行通信而设计的，因此用它作为通信信 level communication protocols should be applied. It is 道，存在着一些不利于信号传输的特性，如强衰减、 necessary to analyze the topological structure of lo w voltage [1~3] 强干扰和强时变性等 ，致使 PLCC 设备的误码 power line carrier communication networks and their 率较高，通信距离较短，而且传输性能随时间、地 characteristics. Through the research on the particularity of low 域等的改变而有很大变化，可靠性较差。如何在现 voltage power line carrier, a concept of bus splitting is presented and it is pointed out that the topological structure of 有硬件的基础上，提高PLCC 的可靠性已经成为当 PLCC network is a complicated digraph with strong 前研究的重点之一。 time-varying feature and the traditional bus listening schemes 以往的研究多数侧重于通过对载波通信设备 will not be effective in such network. Therefore, to meet the 的硬件电路、信号调制解调方式、信号处理方式等 requirement of low voltage PLCC network a brand-new [4~9] 方面的改善来提高通信的可靠性 。然而，从ISO network protocol possessing good adaptive capability should OSI 7 层模