| 引用本文: | 薛晨,王艳,焦彦军.中压配电网电力线载波通信系统自适应频点选择算法[J].电力系统保护与控制,2018,46(6):24-29.[点击复制] |
| XUE Chen,WANG Yan,JIAO Yanjun.Adaptive frequency selection algorithm for power line carrier communication system in medium voltage distribution network[J].Power System Protection and Control,2018,46(6):24-29[点击复制] |
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| 摘要: |
| 在电力线载波通信中应用正交频分复用(Orthogonal Frequency Division Multiplexing, OFDM)技术需要进行频点的优选。在分析信道输入阻抗对电压传输特性影响的基础上，提出一种基于在线测量信道输入电抗的频点优选算法。首先在默认频点下完成通信节点的入网，然后通过在线监测信道输入电抗筛选出部分频点，在这些频点处测试上、下行信号强度，通过简单计算优选频点作为子载波通道。以保定市实际中压配网为例进行仿真验证。仿真结果表明所提算法在保证通信质量前提下，可以筛选掉大量不可用频点，提高了频点优化速度。 |
| 关键词: 中压配电网 电力线载波通信 OFDM 频点选择 信道特性 |
| DOI：10.7667/PSPC170407 |
| 投稿时间：2017-03-23修订日期：2017-09-19 |
| 基金项目:中央高校基本科研业务费专项资金资助(2016MS90) |
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| Adaptive frequency selection algorithm for power line carrier communication system in medium voltage distribution network |
| XUE Chen,WANG Yan,JIAO Yanjun |
| (School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China) |
| Abstract: |
| Optimization of frequency points is needed for the application of Orthogonal Frequency Division Multiplexing (OFDM) technology in power line carrier communication. Based on the analysis of the influence of channel input impedance on voltage transmission characteristics, a frequency selection algorithm based on on-line measurement of channel input reactance is proposed. First, the communication node network is completed under the default frequency, then partial frequency points are selected by online monitoring the channel input reactance, testing the uplink and downlink signal strength at these frequency points. Sub carrier channel frequency points are optimized after simple calculation. The simulation of the actual medium voltage distribution network in Baoding is taken as an example. The simulation results show that the proposed algorithm can filter out a large number of unavailable frequency points under the premise of guaranteeing the communication quality. Thus the frequency optimization speed is improved. This work is supported by the Fundamental Research Funds for the Central Universities (No. 2016MS90). |
| Key words: medium-voltage distribution network power line carrier communication OFDM frequency selection channel characteristics |
