低压电力线路载波通信干扰耦合抑制系统设计  

Design of interference coupling suppression system for low⁃voltage power line carrier communication

作　　者：梁薇 王丹丹 陈亚天 高振伟 LIANG Wei;WANG Dandan;CHEN Yatian;GAO Zhenwei(Beijing Guodiantong Networks Technology Co.,Ltd.,Beijing 100192,China)

机构地区：[1]北京国电通网络技术有限公司,北京100192

出　　处：《电子设计工程》2025年第5期178-181,187,共5页Electronic Design Engineering

基　　金：国家电网有限公司总部科技项目(5108-202218280A-2-389-XG)。

摘　　要：针对低压电力线路载波通信存在通道内干扰,受到干扰耦合特征影响,导致通信不稳定的问题,设计了低压电力线路载波通信干扰耦合抑制系统。通过通信干扰耦合滤波器,滤除噪声和带外干扰。引入抑制干扰耦合的断路器装置,抑制滤波器对载波信号旁路影响。设计串行干扰消除接收端,完成不同数据流空间分集。重建耦合干扰信号,提取干扰耦合特征。利用稀疏采样,有效抑制通信干扰副瓣电平,获取通道接收到的回波信号,确保抑制波能够完成全部匹配。构建耦合抑制器,扩展抑制器抑制频谱,获取处理增益结果,实现通信干扰耦合抑制。实验结果表明,在背景和脉冲噪声下,所研究方法的电压波动幅度分别为±6.3 V和±6.8 V,降低了74.8%和63.8%的电压波动幅度,具有较好的通信干扰耦合抑制效果。In response to the problem of channel interference in low-voltage power line carrier communication,which is affected by interference coupling characteristics and leads to unstable communication,a low-voltage power line carrier communication interference coupling suppression system was designed.Filter out noise and out of band interference through a communication interference coupling filter.Introduce a circuit breaker device to suppress interference coupling and suppress the influence of the filter on the carrier signal bypass.Design a serial interference cancellation receiver to achieve spatial diversity of different data streams.Reconstruct coupled interference signals and extract interference coupling features.By utilizing sparse sampling,the sidelobe level of communication interference is effectively suppressed,and the echo signal received by the channel is obtained to ensure that the suppressed waves can complete all matching.Construct a coupling suppressor,expand the suppressor suppression spectrum,obtain processing gain results,and achieve communication interference coupling suppression.The experimental results show that the under background and pulse noise,the voltage fluctuation amplitude of the studied method is±6.3 V and±6.8 V,respectively,reducing the voltage fluctuation amplitude by 74.8%and 63.8%,and it has a good coupling suppression effect on communication interference.

关 键 词：低压电力线路 载波通信 干扰耦合抑制 稀疏采样 

分 类 号：TN913.6[电子电信—通信与信息系统]