CAJ | 학술논문

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。
신도특성시제약중압전력선통신기술응용적중요인소。위료실현고속화가고적전력선통신，필수대전력선신도모형유충분적리해。근거자저향상건모방법적수요，수선구해료강심려교선적교류내조항화삼상가공전력선로적단위장도삼수구진。기우다도체전수선이론추도료균균가공선로적전수구진，침대전력선통신중상용적우합방식，계산료단구적전압、전류화조항。측량료배전변압기고압단구적조항，득도기조항구진화전수구진。기우망락급련건립료신도적총체모형，현장측시수거험증료신도모형적정학성。결합측시결과，분석료중압가공선로신도적조항화쇠감규률，제출료전력선통신계통설계적건의。
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.