基于支路追加法的配电网混联线路电力线载波通信信道建模

Power Line Carrier Communication Channel Modeling of Hybrid Lines in Distribution Network Based on Branch-adding Method

提出了一种基于支路追加法的中压配电网混联线路的电力线载波通信信道建模方法。根据配电网拓扑结构,利用支路追加法,逐一追加网络各条支路,列写该支路的伏安特性独立方程和基尔霍夫定律电流方程,生成一组具有唯一解的网络矩阵方程。通过该矩阵方程中各未知变量的比值关系,求解信号的传输函数,分析信道的传输特性。当配电网网络结构发生改变时,只需在原代数矩阵方程基础上,增减矩阵中的相关行与列即可得修改后的新矩阵方程。该建模方法原理清晰,运算量小,适用于树形网络、手拉手网络及环网等各种拓扑结构。仿真及实验测试验证了所提方法的正确性。

A PLC channel modeling method of medium-voltage distribution network hybrid lines based on branch-adding method is proposed.According to the distribution network topology,gradually increasing each branch of the network which is utilizing branch-adding method,independent equations of VAR and current equations of KCL produced are to create a set of matrix equations which have a unique solution.Based on the matrix equations ratio relationship of unknown variables,signal transfer function is solved and the transmission characteristic of the channel is analyzed.When structure of the distribution network is changed,simply based on the original algebraic matrix equation,the increase or decrease in the correlation matrix of rows and columns is to build new algebraic matrix equations.The clear modeling method,small amount of calculation applies to topologies of tree-like network,hand in hand network and ring network.Simulation and experimental tests verify the correctness of the proposed method.