电力系统保护与控制2024，Vol.52Issue(23)：159-166,8.DOI:10.19783/j.cnki.pspc.240590
基于倒L型匹配衰减器的宽带PLC信号阻抗匹配
Broadband PLC signal impedance matching based on an inverted L-type matched attenuator
摘要
Abstract
There is a problem of low data transmission rate and signal reflection due to load impedance mismatch in narrowband power line communication(PLC).Thus a broadband PLC impedance matching method based on an inverted L-type matched attenuator is proposed.First,a third-order Butterworth T-type broadband bandpass filter module is designed and implemented based on the frequency,impedance and circuit transformation methods of normalized low-pass filters.Then,the impedance matching between PLC coupler and power line is realized by using a pure resistance matching network with inverted L-shape structure and adjusting the variable resistance elements in the trunk matching network by determining the impedance values at different frequency points.Finally,from the proposed impedance matching method,a PLC coupling circuit with 1～30 MHz bandwidth is designed and fabricated.The results of ADS simulation and experimental verification show that the proposed impedance matching method has good matching effect and easy adjustment of circuit parameters over a wider frequency range.It provides a new theoretical and practical basis for the design of PLC impedance matching.关键词
电力线通信/匹配衰减器/阻抗匹配/耦合/滤波器Key words
power line communications/matched attenuator/impedance matching/coupling/filter引用本文复制引用
曹旺斌,高莹,梁晓林,陈哮锋..基于倒L型匹配衰减器的宽带PLC信号阻抗匹配[J].电力系统保护与控制,2024,52(23):159-166,8.基金项目
This work is supported by the Natural Science Foundation of Hebei Province(No.F2024201053). 河北省自然科学基金项目资助(F2024201053) （No.F2024201053）
中央高校基本科研业务费项目资助(2024MS112) （2024MS112）
河北省省级科技计划项目资助(2023KFKT002) （2023KFKT002）
