摘要
本文利用传输线理论,分析了信号在电力线上的传输过程,引出了多枝节多反射的电力线信道模型,并对其进行仿真。在1~100MHz频段内,对实验室内的低压电力线信道的特性进行了实测,与仿真结果进行了对比。本文讨论了接入220V交流电力网络对所测电力线信道的影响,发现了电力线主干长度、枝节数目、枝节长度和交流电力网络等均会对电力线信道的传输特性和阻抗特性产生影响,电力线的衰减具有频率选择性。
The process of signal transmission within the indoor power line channelis analyzedwith transmission line theory and a multi-branch, multi-reflection channel model is established.The low-voltage power line channel characteristics have been measured in the laboratory and also been simulated with the model studied in the frequency range of 1-100MHz. With the comparison of the measured results with that of the simulation, whether the access of 220V AC power network will affect the power line channel characteristics has been discussed. At last, it is found that the length of the main power line, branch number, branch length, and 220V AC power network affect the transmission parameters and impedance characteristics of the indoor power line. Meanwhile, the attenuation of power line channel have the feature of frequency selectivity.
出处
《电气技术》
2017年第8期27-31,共5页
Electrical Engineering
基金
四川省科技支撑计划项目(2015SZ0054)
四川省应用基础计划项目(2014JY0164)
关键词
电力线
建模
传输特性
衰减
power line
modeling
transmission characteristics
attenuation
