基于多导体传输线的中压电力线通信信道建模  

Modeling of Medium Voltage Power Line Communication Channel Based on Muti-conductor Lines

作　　者：郭以贺[1] 谢志远[1] 石新春[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《中国电机工程学报》2014年第7期1183-1190,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(61172075)~~

摘　　要：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。Channel characteristics are the main obstacles for the development of medium voltage power line communication （PLC）. To implement the high speed and reliable PLC, channel model must be well understood. According to the need of bottom-up approaches, the internal impedance of steel-reinforced aluminum cables （ACSR） and per-unit-length parameters matrix of overhead power lines were calculated firstly. Based on the multi-conductor transmission lines theory, the transmission matrix of uniform overhead medium voltage lines was derived. Terminal voltages, currents and impedance can be determined for the different coupling modes used in PLC. Impedance and transmission matrixes of medium voltage （MV） terminals were calculated by the impedance measurement of medium to low voltage transformer. The complete channel model was presented by the cascade of multiple sections, which was verified with practical measurements. Impedance and propagation properties of MV overhead lines were analyzed, and some proposals were put forward for the design of PLC system.

关 键 词：信道建模 电力线通信 多导体传输线 传输矩阵 配电变压器 

分 类 号：TM73[电气工程—电力系统及自动化]