Assessment of AC traction substation influence on energy quality in a supplying grid

Włodzimierz Jefimowski,

Adam Szeląg

Abstrakt

This article presents investigations performed on a 25 kV AC system with a Scott transformer simulation model. The model includes an energy quality parameter calculation algorithm with consideration to the train timetable. The simulation results enable an analysis of the energy quality parameters at the point of connection of the traction substation to the supplying grid. The presented tool enables the simultaneous calculation of voltage unbalance and harmonic content. The article presents the results of the energy quality analysis at the substation connection point for the specific location. The simulation results of the energy quality parameters are appraised on the basis of standard EN  50160:2010. The tool may prove helpful in the process of designing electrification systems, especially in the choice of traction transformer and power electronics device mitigating an imbalance and harmonic impact

Słowa kluczowe: AC electrification system, electric energy quality, simulation modelling, Scott transformer
References

[1]        Altus J., Novak M., Otcenasova A., Pokorny M., Szeląg A., Quality parameters of electricity supplied to electric railways. Scientific Letters of the University of Żilina-Communications 2–3/2001.

[2]        Barnes R., Wong K.T.: Unbalance and harmonic studies for the Channel Tunnel railway system. IEE Proc. B vol. 138, no 2, March 1991.

[3]        Matta V., Kumar G. Unbalance and voltage fluctuation study on AC traction system.Electric Power Quality and Supply Reliability Conference, pp. 303-308, 2014

[4]        Kowalski Z, Jakość energii elektrycznej – Monografie Politechniki Łódzkiej, 2008.

[5]        Ogunsola A., Mariscotti A.: Electromagnetic Compatibility in Railways. Analysis and Management. Springer 2013.

[6]        Wang H., Tian Y., Qin-chang  G., Evaluation of negative sequence current injecting into the public grid from different traction substation in electrical railways. Electricity Distribution - Part 1, 2009. CIRED 2009. 20th International Conference and Exhibition on , vol., no., pp.1-4, 8-11 June 2009

[7]        Tien-Trung, V., Paleček J., and Kolář V.. Influence of AC Electric Traction on Harmonic Distortion in 110 kV Supply Voltage Network: Measurement and Simulation. Przegląd Elektrotechniczny 89 (2013).

[8]        ZupanA., TeklicA.T., Filipovic-Grcic B., Modeling of 25 kV electric railway system for power quality studies. EUROCON, 2013 IEEE , vol., no., pp.844-849, 1-4 July 2013

[9]        Takeuchi H., Goodman C., Sone S., Peak demand reduction techniques when starting under moving block signaling. Developments in Mass Transit Systems, 1998. International Conference on (Conf. Publ. No. 453) , vol., no., pp.280-285, 20-23 Apr 1998

[10]      Jefimowski W., Burak-Romanowski R., Disturbing impact of AC railway powersupply with a Scott transformer on a supplying grid – laboratory tests. MET’2015 12th International Conference Modern Electric Transport, Trogir, October 4-7, 2015.

[11]      European standard. EN 50160:2010 Voltage characteristics of electricity supplied by public electricity networks.European Committee for Electrotechnical Standardization. 2010.

[12]      Kowalski Z., Jakość energii elektrycznel. Monografie Politechniki Łódzkiej, 2008.

[13]      Szeląg A., Patoka M., Some aspects of impact analysis of a planned new 25kV AC railway lines system on the existing 3 kV DC railway system in a traction supply transition zone. Power Electronics, Electrical Drives, Automation and Motion(SPEEDAM), 2014 International Symposium on. IEEE, 2014.

[14]      John J., Winders, Jr Power Transformers Principles and Applications. Marcel Dekker Inc. New York– Basel 2002.

[15]      Bekele H. M., Harmonic Analysis in 25 kV AC Railway Electrification system: The case of proposed Etiopian Railway System. PhD thesis, Addis Ababa, August 2014.

[16]      Firpo F., Fracchia M. and Savio S., Locomotive drive harmonic pollution in AC traction systems. Industrial Electronics, 1993. Conference Proceedings, ISIE'93 - Budapest., IEEE International Symposium on, Budapest, Hungary, 1993, pp. 622-628

[17]      Liu S. M., Chen D. X., LiQ. L., Zhang X. D. and YuX. P., The Impact of 350km/h High-Speed Railway to Grid Power Quality, 2012 Asia-Pacific Power and Energy Engineering Conference, Shanghai, 2012, pp. 1-4.

[18]      Jefimowski W., Koncepcja zasilania linii kolejowej dużej prędkości w systemie 2 x 25 kV. Master of Science Thesis, Electric Traction Division, Warsaw University of Technology, 2011.

[19]      Бородулин Б. М.. Векслер М. И.. Система тягового електроснабжения 2 x 25 кВ. Москва 1989

[20]      Mandić M., Uglešić I., V. Milardić, Design and testing of 25 kV AC electric railway power supply systems. Tehnički Vjesnik 20, 3(2013), pp. 505-509.