Measurements and Simulations in Trail Operation of Electric Traction Power Supply After Its Modification

The modernization of the railway system on the section of a railway track Moravice – Rijeka – Sapjane was completed in the end of 2012, i.e. transition from a 3 kV DC system to the mono- phase 25 kV AC system with a frequency of 50 Hz. After changing the rail powering system, the same section underwent operational testing. A test freight train was driven along the section and measurements of currents and voltages were conducted at every electric traction substation. This paper shows the flowchart of the train movement simulator as well as the comparison of measurement with simulation results. The influence of the train to nearby telecommunication cables is observed, measurements of induced voltage were conducted and the measurements results are compared with the calculated values.