低压电力线载波通信技术的研究  

Research on Low-Voltage Power Line Carrier Communication Technology

作　　者：樊建学[1] 盛新富[1] 

机构地区：[1]清华大学电机系,北京100084

出　　处：《电测与仪表》2005年第2期36-38,共3页Electrical Measurement & Instrumentation

摘　　要：运用传输矩阵模型对低压电力线通信信道的衰减特性进行了定性分析,并首次综合考虑了电力线通信信道各组成部分的特性。仿真结果表明,在所研究的频率范围(50kHz～500kHz)内,衰减随通信频率的增加并非呈单一的递增关系,驻波现象的存在使得某些距离的点出现极大值或极小值。研制成功的多载波通信专用芯片由于具有对抗频率选择性衰落的特点,所以具有十分重要的现实意义和良好的应用前景。由于交流电压过零处干扰噪声最小,过零点传输技术可以提高低压电力线载波通信的成功率。This paper presents the last applied result of low-voltage power line communication technology. For the first time overall power network elements are described and their effect on the performance of the remote meter reading system is considered. According to the qualitative analysis by the transmission matrices model,transfer function,as a result of standing wave,presents maximum or minimum at some frequency in the range of 50kHz-500kHz. Multi-carrier technology possesses characteristic of anti frequency-selective fading. Reliability is improved when information is transmitted at zero-crossing of voltage on account of slight noise.

关 键 词：低压电力线 衰减 传输矩阵 模型 多载波 过零点 

分 类 号：TN919[电子电信—通信与信息系统]