The characteristics of 10 kV power line carrier communication channel are studied to achieve the reliable and high-speed communication.Based on the theory of two-port network and transmission line,the ABCD-parameter matrix channel model is established.It is easy to calculate and measure the parameters of model and analyze the propagation law of signal transmission between any two nodes.Based on the model,the method of line attenuation calculation is given and the causes of frequency selective fading are rev...