| 引用本文: | 高强,王艳阳,杨红叶,等.基于多进制扩频的低压电力线抄表技术的研究[J].电力系统保护与控制,2014,42(5):136-141. |
| GAO Qiang,WANG Yan-yang,YANG Hong-ye,et al.Low-voltage power line meter reading technology research based on multi-band spread spectrum[J].Power System Protection and Control,2014,42(5):136-141 |
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| 摘要: |
| 低压电力线通信广泛应用于电力抄表系统中。由于低压电力线信道特性复杂，严重影响载波通信质量，结合相关数据资料对低压电力线信道噪声环境进行了分析。为了提高电力线信道条件下的传输可靠性，提出多进制扩频技术，构造了多进制伪随机序列。设计了多进制扩频的低压电力线抄表方案，并建立了基于该信道特性的电力线扩频通信系统模型。通过对其性能仿真验证，仿真结果表明：该多进制扩频方式有效改善了抄表系统误码率性能，更适合于电力线的抄表作业。 |
| 关键词: 电力线 多进制 抄表 扩频 伪随机序列 |
| DOI：10.7667/j.issn.1674-3415.2014.05.022 |
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| Low-voltage power line meter reading technology research based on multi-band spread spectrum |
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GAO Qiang, WANG Yan-yang, YANG Hong-ye, LIU Na
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Institute of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071000, China
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| Abstract: |
| Low voltage power line communication is an important technology of the electric power meter reading system. The low-voltage power line channel is complex and seriously affects the quality of carrier communication. Combining with relevant data, the paper analyzes the low-voltage power line channel noise environments. The multi-band spread spectrum technology is put forward and is applied to the power meter reading system in order to improve the performance of noise resistance. Characteristic polynomial of multi-band pseudo random sequence is proposed. The way of data shift register is used to produce multi-band spread spectrum code. The research of autocorrelation function characteristics and cross-correlation function characteristics of multi-band spread spectrum sequence is simulated. And the characteristics of error rate is presented. The results show that the performance of multi-band spread spectrum code is better than that of binary spread spectrum code. And it can improve the performance of characteristics of error rate. At the same time, low voltage power line meter reading scheme of multi-band spread spectrum is designed. |
| Key words: power line multi-band meter reading spread spectrum pseudo-random sequence |
