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基于多导体传输线的中压电力线通信信道建模

DOI: 10.13334/j.0258-8013.pcsee.2014.07.021, PP. 1183-1190

Keywords: 信道建模,电力线通信,多导体传输线,传输矩阵,配电变压器

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Abstract:

信道特性是制约中压电力线通信技术应用的重要因素。为了实现高速和可靠的电力线通信,必须对电力线信道模型有充分的理解。根据自底向上建模方法的需要,首先求解了钢芯铝绞线的交流内阻抗和三相架空电力线路的单位长度参数矩阵。基于多导体传输线理论推导了均匀架空线路的传输矩阵,针对电力线通信中常用的耦合方式,计算了端口的电压、电流和阻抗。测量了配电变压器高压端口的阻抗,得到其阻抗矩阵和传输矩阵。基于网络级联建立了信道的总体模型,现场测试数据验证了信道模型的正确性。结合测试结果,分析了中压架空线路信道的阻抗和衰减规律,提出了电力线通信系统设计的建议。

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