面向10kV馈线自动化系统的单子载波OFDMA电力线通信方法  

OFDMA-based power line communication in single-subcarrier communication mode for 10kV feeder automation system

作　　者：胡正伟[1] 谢志远[1] 郭以贺[1] 黄怡然[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《电力自动化设备》2015年第2期160-167,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(61172075);中央高校基本科研业务费专项资金资助项目(916111204)~~

摘　　要：针对10 kV馈线自动化系统的通信特点,提出了一种基于正交频分多址接入(OFDMA)技术的电力线通信方法。该方法采用单子载波通信模式实现信号发送功率最大化,避免了多载波OFDMA系统中的峰均比(PAR)问题,减少了计算量。单子载波通信模式采用主子载波和辅子载波交替通信,以保证10 kV馈线系统能采用通信质量最高的子载波。为提高通信效率,采用可用子载波标识向量选择辅子载波,并根据实际电网运行情况实时刷新可用子载波标识向量。对通信成功率、子载波切换周期进行了分析。现场运行测试结果表明,所提单子载波通信模式的通信成功率较高。A method of power line communication is proposed based on OFDMA（Orthogonal Frequency Division Multiple Access） for the automation system of 10 kV feeder,which adopts the single-subcarrier communication mode to gain the maximum transmission power,avoid the PAR（Peak-to-Average Ratio） problem and reduce the calculation load. The single-subcarrier communication mode adopts the alternate communication of master subcarrier and auxiliary subcarrier,which ensures that the subcarrier with higher communication quality is used by the 10 kV feeder automation system. The auxiliary subcarrier is selected by an identification vector of applicable subcarrier to enhance the communication efficiency,which is refreshed in real time according to the actual operating conditions of power grid. The communication success rate and the subcarrier switchover period are analyzed. The results of field test show that,the single-subcarrier communication mode has high communication success rate.

关 键 词：配电 正交频分多址接入 馈线自动化 电力线 通信 频率切换 子载波 

分 类 号：TM73[电气工程—电力系统及自动化]