| 引用本文: | 曹旺斌,高 莹,梁晓林,等.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.[点击复制] |
| CAO Wangbin,GAO Ying,LIANG Xiaolin,et al.Broadband PLC signal impedance matching based on an inverted L-type matched attenuator[J].Power System Protection and Control,2024,52(23):159-166[点击复制] |
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| 摘要: |
| 针对窄带电力线通信(power line communication, PLC)数据传输速率低、负载阻抗不匹配导致信号反射的问题，提出一种基于倒L型匹配衰减器的宽带PLC阻抗匹配方法。首先，基于归一化低通滤波器的频率变换、阻抗变换和电路变换方法，设计实现了三阶巴特沃斯T型宽带带通滤波模块。然后，采用倒L型结构的纯电阻匹配网络，通过确定不同频点的阻抗值调整主干匹配网络中可变电阻元件，实现了PLC耦合器与电力线之间的阻抗匹配。最后，根据提出的阻抗匹配方法设计制作了具有1~30 MHz带宽的PLC耦合电路。 ADS仿真和实测验证均表明，所提阻抗匹配方法在更宽的频率范围内具备良好的匹配效果和电路参数易调节的特点，为PLC阻抗匹配的设计提供了新的理论和实践依据。 |
| 关键词: 电力线通信 匹配衰减器 阻抗匹配 耦合 滤波器 |
| DOI：10.19783/j.cnki.pspc.240590 |
| 投稿时间：2024-05-13修订日期：2024-07-23 |
| 基金项目:河北省自然科学基金项目资助(F2024201053)；中央高校基本科研业务费项目资助(2024MS112)；河北省省级科技计划项目资助(2023KFKT002) |
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| Broadband PLC signal impedance matching based on an inverted L-type matched attenuator |
| CAO Wangbin1,2,GAO Ying1,2,LIANG Xiaolin2,3,CHEN Xiaofeng1,2 |
| (1. School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China; 2. Hebei
Provincial Key Laboratory of Electric Power Internet of Things Technology (North China Electric Power University),
Baoding 071003, China; 3. School of Electronic and Information Engineering, Hebei University, Baoding 071002, China) |
| 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. |
| Key words: power line communications matched attenuator impedance matching coupling filter |
