Impedance model of complex grid network based on transfer matrix

The distribution network has a complex network architecture with a large number of connected loads and a variety of types, which makes it difficult to accurately analyze the channel characteristics of the distribution lines as a carrier signal transmission channel due to the influence of various factors. This paper constructs an simple impedance model for complex grid network based on transmission line theory and transfer matrix, and proposes a method for calculation of signal propagation attenuation on complex distribution network. Through simulation of signal transmission from 30 kHz to 30 MHz, the impedance and propagation attenuation characteristics of the power line communication link affected by the number of nodes and the distribution of nodes were analyzed.