直流载波通讯系统线路特性研究与系统实现  

Research on Line Characteristics and System Realization of DC Carrier Communication System

作　　者：周军[1] 董承霖 乔建 ZHOU Jun;DONG Chenglin;QIAO Jian(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China;Jilin Power Supply Company,State Grid Jilin Electric Power Supply Company,Jilin 132012,China)

机构地区：[1]东北电力大学电气工程学院,吉林132012 [2]国网吉林省电力公司吉林供电公司,吉林132012

出　　处：《电力系统及其自动化学报》2023年第12期142-150,共9页Proceedings of the CSU-EPSA

基　　金：吉林省科技厅科技计划重点研发资助项目(20180201010GX)。

摘　　要：为实现供电线和数据传输线的复用,针对现有直流载波通讯系统无法做到长距离、大功率和高速传输的现状,以及带有大功率时变负载时发送逻辑0、电压波形剧烈波动造成误码的问题,重点分析直流载波通讯系统的数据传输特性,提出一种利用双电源技术对直流载波通讯系统传输数据波形进行改善的方法,并设计一套基于两条仪表用供电线路半双工模式的直流载波通讯电路。经过实验验证,与RS485系统相比,所提系统未增加布线即可实现供电和通讯功能,且拓扑结构任意,误码率较低,非常适合在仪器仪表与控制室各个模块之间的直流载波通讯电路中使用。Aimed at the situation that the existing DC carrier communication system cannot achieve a long-distance,high-power and high-speed transmission and the problem of error caused by sharp fluctuations of voltage waveform when sending logic“0”under high-power time-varying load,the data transmission characteristics of DC carrier communication system are analyzed to realize the reuse of power supply line and data transmission line.On this basis,a dual-power technology is proposed to improve the data transmission waveform of DC carrier communication system,and a set of DC carrier communication circuit in half duplex mode which is based on two instrument power supply lines is designed.Through experimental results,it is verified that compared with those of the RS485 system,the power supply and communication functions of the proposed system can be realized without adding wiring.In addition,the topology is of arbitrary structure and with a low error rate,which is suitable for the use in a DC carrier communication circuit between instruments and modules in a control room.

关 键 词：主从站 直流载波 低压直流 通讯技术 传输特性 

分 类 号：TM73[电气工程—电力系统及自动化]