Impact of rail impedance intrinsic variability on railway system operation, EMC and safety

• Published in: International journal of electrical and computer engineering (Malacca, Malacca) Vol. 11; no. 1; pp. 17 - 26
• Main Author: Mariscotti, Andrea
• Format: Journal Article
• Language: English
• Published: Yogyakarta IAES Institute of Advanced Engineering and Science 01.02.2021; Institute of Advanced Engineering and Science (IAES)
• Subjects: Alternating current; Circuits; Electric power; Electromagnetic compatibility; Engineering Sciences; Induced voltage; Inductance; Parameter identification; Rails; Railways; Rolling stock; Safety; Short circuit currents; Stray current; Track circuits; Transportation systems
• ISSN: 2088-8708; 2722-2578; 2088-8708
• DOI: 10.11591/ijece.v11i1.pp17-26

Running rails in electrified transportation systems are the interface element for several phenomena related to system performance, electromagnetic compatibility and safety: useful voltage at rolling stock, short circuit current, induced voltage, stray current, and track circuit operation. This work presents the physical and mathematical groundings of rail electrical parameters (dc and ac resistance, ac internal and external inductance) and experimental results available in the literature, discussing variability and reliability for each interface. The results consist thus of the identification of the relevant rails longitudinal electrical parameters, the presentation of a set of reliable experimental values, and the discussion of the best approach to manage their variability and uncertainty.