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为了实现配电网高速、可靠通信,对其信道特性进行了研究。从多导体传输线理论出发,在试验场地架设了三相传输线,测得不同情况下的信号传输规律,采用MATLAB对其建模仿真并验证结果的正确性。由于信号在传输线上的传输规律与线路的一次参数密切相关,分析了如何根据线路的型号、材质、布线结构来计算不同频率下线路的一次参数矩阵。分析结果表明,在衰减较小的频段,采用合理调制方式可以实现信号高速、可靠传输。
In order to realize the high-speed and reliable communication of distribution network, the channel characteristics are studied. Based on the theory of multi-conductor transmission line, a three-phase transmission line was set up in the test site to measure the signal transmission law in different situations. The simulation was done by MATLAB and the correctness of the result was verified. Because the transmission rule of the signal in the transmission line is closely related to the first parameter of the line, it is analyzed how to calculate the first parameter matrix of the line under different frequencies according to the type, material and wiring structure of the line. The analysis results show that the signal can be transmitted at a high speed and with a reasonable modulation mode in the frequency band with small attenuation.