低压输电线路载波通信多耦合干扰抑制方法设计  

Design of Multiple Coupling Interference Suppression Method for Low Voltage Transmission Line Carrier Communication

作　　者：熊彪 XIONG Biao(Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen 518000)

机构地区：[1]深圳供电局有限公司,深圳518000

出　　处：《环境技术》2024年第6期131-136,142,共7页Environmental Technology

基　　金：2023年深圳供电局有限公司管理创新类科技项目:基于配网架空线路运维模式的研究与实践成果,项目编号:090000KK52222022。

摘　　要：低压输电线路通信过程被描述为时滞多变量过程,固有的复杂耦合和时滞的存在,为耦合干扰信号识别和抑制带来难度。在耦合干扰抑制过程中,设定的滤波阈值相对固定,干扰抑制过程通常会受到多耦合因素的影响,危及电线路载波通信的稳定性。提出低压输电线路载波通信多耦合干扰抑制方法。构建低压输电线路载波通信信道模型,获取含噪的载波通信信号。利用稀疏采样算法在载波通信信号中提取多耦合干扰信号。由于载波通信信号与干扰信号存在相似性,所提取的多耦合干扰信号包含通信信号。对处理后的多耦合干扰信号进行分块处理,计算其与正常通信信号稀疏系数向量的关联系数,得到耦合特征。基于这些特征构建载波通信样本信号多耦合干扰判断模型。通过计算载波通信样本信号与多耦合干扰特征之间的相似程度,并与判定阈值进行比较,抑制多耦合干扰。实验结果显示:应用提出方法能够更有效的抑制载波通信干扰,且在多工况情况下,多耦合干扰信号占比更低,充分证实了提出方法的可靠性。The communication process of low-voltage transmission lines is described as a time-varying process with inherent complex coupling and the presence of time delay,which brings difficulties to the identification and suppression of coupled interference signals.In the process of coupling interference suppression,the set filtering threshold is relatively fixed,and the interference suppression process is usually affected by multiple coupling factors,endangering the stability of wire carrier communication.Propose a multi coupling interference suppression method for low-voltage transmission line carrier communication.Construct a low-voltage transmission line carrier communication channel model to obtain noisy carrier communication signals.Extracting multi coupling interference signals from carrier communication signals using sparse sampling algorithms.Due to the similarity between carrier communication signals and interference signals,the extracted multi coupling interference signals include communication signals.Block the processed multi coupling interference signal,calculate its correlation coefficient with the sparse coefficient vector of the normal communication signal,and obtain the coupling features.Based on these features,a multi coupling interference judgment model for carrier communication sample signals is constructed.By calculating the similarity between carrier communication sample signals and multi coupling interference features,and comparing them with the decision threshold,multi coupling interference is removed.The experimental results show that the proposed method can more effectively suppress carrier communication interference,and under multiple operating conditions,the proportion of multi coupling interference signals is lower,fully confirming the reliability of the proposed method.

关 键 词：载波通信 可靠性 耦合干扰 低压输电线路 通信干扰 协同抑制 

分 类 号：TM73[电气工程—电力系统及自动化]