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. This work is supported by Fundamental Research Funds for the Central Universities(No. 2016MS90).