Electromagnetic Influences of Traction Networks Amplified by Coaxial Cable on Pipelines

The article is dedicated to issues of simulation of electromagnetic influences upon 25 kV traction network strengthened by coaxial cables with insulation from molecularly crossed linked polyethylene on a steel pipeline with diameter of 250 mm laid on the ground surface. The simulation was conducted in Fazonord software application designed in Irkutsk State Transport University. The modeling results allowed formulation of the following conclusions: the use of amplifying cables results in the following positive effects: stepping up voltage on current collectors; reduction in electrical and magnetic fields strengths; reduction in induced voltages on overhead power supply and communication lines; effects of the amplifying cables on the levels of voltage induced on pipelines with distributed earthing, considerably differ from: connection of these cables leads to some rise in induced voltages; their maximum values increase from 28 to 36V; however, the permissible value is not exceeded; induced voltages differ in significant harmonic distortions, and the level of these distortions increases when the amplifying cables are connected. The proposed methodology can be used to solve practical problems associated with the design and operation of converging pipelines sections for oil and gas transport with routes of electrified AC railroads. This work was financially supported by the grant “Improving the quality of electric energy and electromagnetic safety in railway power supply systems equipped with Smart Grid devices by applying methods and means of mathematical modeling based on phase coordinates”.