## Analysis of Methods for Calculating Electromagnetic Transients in Multiphase Transmission Lines With Distributed Parameters Type of High Voltage Cable Lines

The article describes the methodological bases of calculation of multiphase transmission lines with distributed parameters of the type of cable lines of high voltage for the analysis of electromagnetic and transient processes in three-phase cable lines. Methods of constructing mathematical model, choice of their structure and calculation of model parameters are shown. An example of the use and research of mathematical model data in the Matlab system.