| 引用本文: | 李松浓,胡晓锐,郑可,等.低压电力线载波通信信道衰减特性测量与分析[J].电力系统保护与控制,2018,46(4):99-106.[点击复制] |
| LI Songnong,HU Xiaorui,ZHENG Ke,et al.Measurement and research on attenuation characteristics of low voltage power line communication channel[J].Power System Protection and Control,2018,46(4):99-106[点击复制] |
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| 摘要: |
| 研究低压配电网信号传输衰减特性对提高电力线通信系统中物理层信号传输的稳定性和可靠性具有重要意义。通过实测低压电力线横截面积、长度及网络结构对信号传输衰减的影响，精确计量和分析了宽频带范围内信号的幅频衰减特性随电力线基础特性变化的趋势，提出利用近距离和常态T型网络模型研究电力线信道多径传输的频率选择性衰落。通过仿真和实测直观展示了电力线基础特性影响信号传输衰减的统计效果，对深刻理解和把握低压电力线信号传输特性形成的本质原因具有重要借鉴作用，为预测复杂配电网中信号传输特性提供了一种有效分析方式。 |
| 关键词: 低压配电网 幅频衰减特性 电力线信道 T型网络模型 |
| DOI：10.7667/PSPC170182 |
| 投稿时间：2017-02-13修订日期：2017-05-31 |
| 基金项目:国家电网公司科技项目“用电信息采集系统及设备性能监测和诊断优化技术研究”;中国博士后科学基金资助项目(2015T80961);重庆市自然科学基金资助(cstc2016 jcyjA0214) |
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| Measurement and research on attenuation characteristics of low voltage power line communication channel |
| LI Songnong,HU Xiaorui,ZHENG Ke,SUN Hongliang,HOU Xingzhe,WANG Yi |
| (State Grid Chongqing Electric Power Research Institute, Chongqing 401123, China;State Grid Chongqing Electric Power Research Institute, Chongqing 401123, China;Postdoctoral Workstation, State Grid Chongqing Electric Power Company, Chongqing 401123, China;Chongqing University of Posts and Telecommunications, Chongqing 400065, China) |
| Abstract: |
| To study the attenuation characteristics of signal transmission in low voltage distribution network is very important to optimize the stability and reliability of the physical layer of signal transmission in the local communication system. This paper measures signal transmission attenuation influenced by cross-sectional area, length and network structure of low voltage power line, calculates and analyzes the amplitude frequency attenuation characteristics change with the basic properties of power line within the range of wide band accurately. The little distance and normal T type network structure models are proposed to research the frequency selective fading caused by multipath transmission of power line communication channels. Simulation and measurement statistics results of signal transmission attenuation characteristics influenced by basic characteristics are showed by diagrams intuitively. Those results are very useful for understanding and grasping the essential reasons of low voltage power line transmission characteristics, which provides an effective analysis method for the prediction of signal transmission characteristics in complex distribution network. This work is supported by Science and Technology Project of State Grid Corporation of China “Research on Power Utilization Information Acquisition System and Monitoring & Diagnosis Optimization Techniques for Equipment Performance”, China Postdoctoral Science Foundation (No. 2015T80961), and Natural Science Foundation of Chongqing (No. cstc2016jcyjA0214). |
| Key words: low-voltage power distribution network amplitude frequency attenuation characteristics power line communication channel T type network structure models |
