基于传输线理论的信道幅频特性与负载阻抗关联机制分析  

Analysis of Correlation Mechanism Between Channel Amplitude FrequencyCharacteristics and Load Impedance Based on Transmission Line Theor

作　　者：谢志远[1] 杨锐 胡正伟[1] XIE Zhiyuan;YANG Rui;HU Zhengwei(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071005,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071005

出　　处：《无线电工程》2023年第8期1901-1909,共9页Radio Engineering

基　　金：国家自然科学基金面上项目(52177083)。

摘　　要：电力线通信中负载阻抗多变,网络结构复杂难以分析,准确分析出负载阻抗对于提高电力线通信质量以及实现电网用户侧负荷预测具有重要意义。基于传输线理论分析了负载阻抗与电力线信道传递函数幅频特性的关联机制,根据电缆参数与网络结构,通过计算与输入阻抗相关的电流常数,对2~30 MHz的传递函数仿真,分析了不同传输线长度、节点数和负载阻抗的影响。通过与传输矩阵方法的分析对比,验证了提出方法的正确性。In power line communication,the load impedance is changeable,and the network structure is complex and difficult to analyze.Accurate analysis of load impedance is of great significance for improving the quality of power line communication and achieving the load forecasting on the customer side.Based on the transmission line theory,the correlation mechanism between the load impedance and the amplitude frequency characteristics of the channel transfer function is analyzed.According to the cable parameters and network structure,by calculating the current constant related to the input impedance,the transfer function model in the frequency range of 2~30 MHz is simulated.The influence of different transmission line length,node number and load impedance are analyzed.Compared with the transfer matrix method,the correctness of this method is verified.

关 键 词：电力线通信 传输线理论 输入阻抗 电流常数 传递函数。 

分 类 号：TM711[电气工程—电力系统及自动化]