网络参数对低压宽带电力线信道的影响

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摘要在电力线载波信道的研究中,目前有关电网结构对电力线载波性能的影响研究较少,多径效应和频率选择性衰落现象难以从现有模型得到合理解释,也对电力线节点间的通信性能和路径拓扑中继理论支持不足,制约了宽带电力线载波通信性能的提升。针对此,通过使用基于传输线理论的方法对低压电力线通信信道仿真建模,分析了不同网络拓扑结构对频率为2~30MHz的低压宽带电力线信道特性的影响。仿真得到不同电力线长度、分支长度、单节点分支数、分布式分支数和负载阻抗的低压宽带电力线信道频率响应,并通过反傅里叶变换得到对应的信道时域冲激响应。结果表明,电力线信道频率响应中的峰值点和陷波频点的位置和衰减会受到上述网络参数的影响,时域冲激响应也会因此而衰减和失真。本文的研究对于宽带电力线通信技术在能源互联网中的有效应用具有重要意义。

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	卢文冰
	张慧
	赵雄文
	索超男

关键词 ：宽带电力线信道, 信道特性, 频率选择性, 多径效应, 陷波频点

Abstract：On the broadband power line channel, there is little research nowadays on the influence of power grid structure related to power line carrier performance. Multipath effect and frequency selective fading are difficultly explained from existing models, they have insufficient support to the communication between power line nodes as well as the relay by network topology, which limits the performance improvement for power line carrier communications. For the sake of the aforementioned reasons, this work analyzes the influence of different network topologies on low-voltage broadband power line channel (BPLC) characteristics in 2~30MHz frequency range by simulating and modeling the power line communication channel based on transmission line theory. The frequency responses of the low-voltage BPLC are obtained by changing the lengths of the direct and branched lines, number of concentrated branches, number of distributed branches and load impedances. The time-domain impulse responses are also studied by using inverse Fourier transform. The results show that aforementioned network parameters affect the positions and attenuation of the notches and peaks in the amplitude responses. As a result, the time-domain impulse responses will be attenuated and distorted. The results in this paper are useful in the applications of broadband power line communication technology to energy network.

Key words： Broadband power line channel (BPLC), channel characteristic, frequency selective, multipath effect, notch

出版日期: 2017-01-04

PACS:	TN913.6
	TM73

作者简介: 卢文冰男,1969年生,博士,副教授,研究方向为电力系统通信。 E-mail: jiaoshijie@vip.sina.com（通信作者）张慧女,1989年生,博士研究生,研究方向为电力系统通信。E-mail: 545446472@qq.com

引用本文:

卢文冰, 张慧, 赵雄文, 索超男. 网络参数对低压宽带电力线信道的影响[J]. 电工技术学报, 2016, 31(增刊): 221-229. Lu Wenbing, Zhang Hui, Zhao Xiongwen, Suo Chaonan. The Effect of Network Parameters for Low-Voltage Broadband Power Line Channels. Transactions of China Electrotechnical Society, 2016, 31(增刊): 221-229.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I增刊/221

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