THE IMPLEMENTATION OF SIMULATION MODEL OF POWER SUPPLY SYSTEM WITH 2X25 kV AUTOTRANSFORMER ELECTRIC TRACTION NETWORK AT DOUBLE-TRACK ELECTRIFIED RAILWAY LINE IN MATLAB/SIMULINK

The article is devoted to simulation modeling of work of 2х25 kV traction energy system of alternating current at double-track electrified railway line in MatLab/Simulink. The article suggests the way of modeling 2х25 kV electric traction network for double-track section with multiple mutual inductance coupling of conductor path within one track and between two tracks. The article considers modeling of points for parallel connections of contact system, located in places of autotransformer points’ installation. The author gives recommendations on easy construction of simulation model for “normal” 1х25 kV power supply system, using the considered simulation model for 2х25 kV system. The opportunities of modeling various schemes of tracking substations for 2х25 kV system are presented: with cascade connection of two three-phase transformers; with single-phase transformers and split secondary winding; with step-up autotransformers at feeders of tracking substation.