Efficiency of joint operation of 25 kV reverse traction AC network devices and railway automation and telemechanics on heavy-load railway sections

Introduction. The Eastern Polygon, which covers Trans-Baikal and Far Eastern Russian railways, is characterised by increased freight traffic with an expected growth in the near future. The operation of traction power supply devices in certain areas is associated with a high current load, including reverse traction network. Special measures are required to secure the network and keep it operational.

Materials and methods. Rosengartovka – Boytsovo – Bikin section of the Far Eastern Railway was chosen as the research object to assess the impact of joint operation of reverse traction AC network devices and railway automation and telemechanics. The section is located on the main electrified course of the Trans-Siberian railway with an AC traction with 25 kV voltage. Comparative analysis of the effectiveness of the most significant measures in terms of impact on improving the security of railway automation and telemechanics devices was carried out when working with a 25 kV reverse traction AC network.

Results. The operation parameters of reverse traction AC network with 25 kV voltage in the study area were determined. The factors of mutual influence on the performance parameters in conditions of real movement of heavy-load trains arising in the operation of the reverse traction network and the degree of their influence on the performance of railway automation and telemechanics devices are estimated.

Discussion and conclusion. According to the results of the research conducted on the section of the Far Eastern Railway, evidence is provided on the possibility of increasing the critical voltage of switching devices up to 2500 V. Technical measures were developed and classified to minimise the impact of 25 kV reverse traction network modes on the operational performance of railway automation and telemechanics devices, indicating the degree of their impact and evaluating the achieved effect.

1. Kosarev A.B., Kosarev B.I. Fundamentals of electromagnetic safety of railway power supply systems. Moscow: Intext. 2008. 480 p. (In Russ.). EDN: https://elibrary.ru/vmeqbz.

2. Kosarev A. B., Kosarev B. I. Electromagnetic compatibility of the electrical installations of non-traction loads and the power supply system with a high-voltage power lead. Elektrichestvo. 2020;(1):12–19. (In Russ.). https://doi.org/10.24160/0013-5380-2020-1-12-19. EDN: https://elibrary.ru/kpmxya.

3. Kosarev A.B., Kosarev B.I. Electromagnetic effect of an alter nating current traction power supply system with a high-voltage power cord on electrical installations and networks of nontraction consumers. Russian Electrical Engineering. 2020;91(2):128–134. https://www.doi.org/10.3103/S1068371220020054. EDN: https://elibrary.ru/putbbz.

4. Karyakin R.N. Methodology for calculating the resistances of AC traction networks. Moscow: Transzheldorizdat. 1962. 37 p. (In Russ.).

5. Bushuev A.V., Bushuev V.I., Bushuev S.V. Rail networks: theoretical foundations and operation. Ekaterinburg: USURT, 2014. 311 p. (In Russ.). EDN: https://elibrary.ru/vwpcjp.

6. Rudashevsky R.A., Rudashevskaya A.V., Smolin P.I., Rebrov I.A. Im provement of automated means for determining operating modes and calcu lating parameters of traction power supply system. Science and Education for Transport. 2021;(2):66–69. (In Russ.). EDN: https://elibrary.ru/twncgm.

7. Kosarev B.I. Electrical safety in AC traction networks. Moscow: Trans port, 1988. 215 p. (In Russ.).

8. Krylov A.A., Rebrov I.A., Rudashevskaya A.V., Rudashevskiy R.A., Khar’kovskaya E.D. Transition resistance influence of the upper structure track ballast on the rail-to-earth potential at AC railway sections. Russian Railway Science Journal. 2022;81(1):16–22. (In Russ.). https://doi.org/10.21780/2223-9731-2022-81-1-16-22. EDN: https://elibrary.ru/swlkkq.

9. Tryapkin E.Yu., Ignatenko I.V., Vlasenko S.A., Shurova N.K. Study of causes of increased potentials of alternating current traction rail net work by registration of data in united time mode. Transport of the Urals. 2023;1(76):120–125. https://doi.org/10.20291/1815-9400-2023-1-120-125. (In Russ.). EDN: https://elibrary.ru/oplnph.

10. Kovalev V.A., Tryapkin E.Yu., Ignatenko I.V. Rail-to-earth potential calculation for 25 kV traction energy system in PascalABC.NET program. Transport of the Asia-Pasific Region Science Journal. 2019;2(19):44–46. (In Russ.). EDN: https://elibrary.ru/yaoiay.

11. Ignatenko I.V., Vlasenko S.A., Tryapkin E.Yu., Kovalev V.A. Development of a methodology for calculating the rail-to-ground potential in conditions of heavy traffic. Scientific Papers of the Kuban State Technological University. 2022;(4):93–102. (In Russ.). EDN: https://elibrary.ru/ugrcdr.

12. Tryapkin E.Yu., Shurova N.K. Examining the inf luence of electric rolling stock operating mode on the potential in the rail chain. Transport of the Asia-Pasific Region Science Journal. 2020;4(25):74–78. (In Russ.). EDN: https://elibrary.ru/uhiihj.