智能电网中低压载波通信信道模型构建  

Model Construction of Low-Voltage Carrier Communication Channel in Smart Grid

作　　者：刘俊萍 LIU Junping(Fujian Chuanzheng Communications College,Fuzhou 350007,China)

机构地区：[1]福建船政交通职业学院,福建福州350007

出　　处：《通信电源技术》2023年第23期198-200,共3页Telecom Power Technology

摘　　要：由于现有的信道模型衰减指数不在标准范围内,信号传输结果不符合预期,提出构建智能电网中低压载波通信信道模型。首先,对无线通信模型进行校正优化处理,增加信息网络的覆盖程度,以完成对通信信道的校正。其次,消除输电线路中的信道干扰噪声,将白噪声和窄带干扰进行叠合,观察信道频谱中低压输电线路信道的衰落特征,以减少信号在低压输电线路中的传输距离。最后,将信道功率的分布限制在规定的频率变化范围内,避免低频段传输特性受到负载变化的影响,并运用传递函数来描述其传输特性,从而完成模型构建。实验结果表明,8个小组的信道模型衰减指数均在-50~40 dB,传输结果符合预期,能够根据低压电力传输线衰减信号耦合电路参数,提高传输速率。Because the attenuation index of the existing channel model is not within the standard range and the signal transmission results are not in line with expectations,a low-voltage carrier communication channel model in smart grid is proposed.Firstly,the wireless communication model is corrected and optimized to increase the coverage of the information network,so as to complete the correction of the communication channel.Secondly,the channel interference noise in transmission lines is eliminated,the white noise and narrowband interference are superimposed,and the fading characteristics of low-voltage transmission lines in channel spectrum are observed to reduce the transmission distance of signals in low-voltage transmission lines.Finally,the distribution of channel power is limited to the specified frequency range to avoid the influence of load change on the transmission characteristics of low frequency band,and the transfer function is used to describe its transmission characteristics,thus completing the model construction.The experimental results show that the attenuation indexes of the eight groups’channel models are all in the range of-50~40 dB,and the transmission results are in line with expectations,which can improve the transmission rate according to the parameters of the attenuation signal coupling circuit of low-voltage power transmission lines.

关 键 词：智能电网 载波通信 通信信道模型 白噪声 

分 类 号：TM76[电气工程—电力系统及自动化]