中压电力线通信信道特性测试及研究

利用10 kV中压电力线进行高速数据传输的研究已成为国内外相关研究机构的热点,文章详细描述了在北京开展中压电力线实际测试的情况,给出了在1~40 MHz频段内噪声与信道衰减特性的测试结果。测试表明中压电力线信道的噪声和衰减特性随时间变化不大,噪声随频率的增加而降低,衰减则随频率的增加而增大,最后利用“注水算法”计算得到了理想条件下所测中压电力线通信信道的容量。

Channel characteristic measurement and study for medium-voltage PLC

In the paper the measurement results of channel attenuation and noise within the frequency range of 1~40 MHz on 10 kV middle voltage powerline were presented.Results show both attenuation and noise characteristic were quite stable,not changing drastically with time.The attenuation increased with the increase of frequency while the noise level dropped with the increase of frequency.This,naturally,could provide certain signal-to-noise ratio balance by channel itself and should be considered with the system design.Theoretical channel capacity using water-filling algorithm is given,which is also helpful in the system design.