Power quality complex estimation at alternating current traction substations

D. O. Bosiy

Abstract


Purpose. At alternating current traction substations are used three-winding transformers. This scheme comes to significant costs from power quality disturbances at each supplier. The most significant power quality indices at alternating current traction substation are voltage deviation, voltage unbalance and harmonic distortion. The purpose of this article is power quality complex estimation at two traction substations that work on the one district of traction network. Methodology. The measurements were made according to accepted program during 24 hours with 1 sec discretization. A few power quality analyzers PM175 are used to record data with time synchronization. The scheme of measurements means that devices are connected through current and potential transformers at the each level of voltage. Findings. Voltage level at different substation is various due to power losses in primary network. The voltage in one phase of 1-st substation is bigger than in other phases. Voltage THD values according to standard requirements are below norm only for primary 154 kV networks. For another traction and regional networks voltage THD values are above norm value. The voltage unbalances in 154 kV networks are below voltage unbalance in 35 kV networks. Besides the voltage unbalance in 154 kV network is below 2 % that complies with the requirements of standard. At the same time we can consider that voltage and current spectrums consist from discrete harmonics with frequencies that multiples of the fundamental frequency. Originality. Voltages at the connection points of traction substations to supply lines are complex stationary random process that determines the voltage mode of the external power supply system of each traction substation. The flows of active and reactive power of the higher harmonics at AC traction substation are directed opposite power of the fundamental harmonic. The power flows on higher harmonics create the disturbing impact on related devices. The total power at AC traction substation consists of 61,8 % of the active power, 32,5 % of the reactive power of the 1st harmonic and 5,7 % of the distortion power in the quadrature components. Practical value. Analysis of the quadrature components suggests that traditional approaches to reactive power compensation at the fundamental frequency will be sufficiently effective. But the influence of the distortion power on reducing energy losses must be also researched. Besides reactive power compensation should be considered with the issue of reducing the basic power quality indices to standardized values.


Keywords


power quality; alternating current; three-phase system; traction substation; measurement; harmonic; distortion; unbalance; spectrum; powers flow

References


Bader M.P. Elektromagnitnaya sovmestimost [Electromagnetic compatibility]. Moscow, UMK MPS RF Publ., 2002. 638 p.

Bosyy D.O. Optymizatsiia keruvannia rehulovanoiu kompensatsiieiu reaktyvnoi potuzhnosti na tiahovykh pidstantsiiakh zminnoho strumu [Optimizing the controlled compensation of reactive power at the AC traction substations]. Informatsiino-keruiuchi systemy na zaliznychnomu transporti – Information and control systems on railway transport, 2010, no. 1, pp. 24-32.

Bosyy D.O., Sichenko V. G. Matematychne modeliuvannia elektrotiahovoho navantazhennia v zadachakh vyvchennia elektromahnitnykh protsesiv dlia system elektropostachannia elektrychnoho transportu zminnoho strumu [Mathematical modeling of electric traction load in tasks of electromagnetic processes studying for AC electric traction power systems]. Tehnichna elektrodimanika, tematychnyi vypusk – Technical electrodynamics, Special issue, 2009, part 3, pp. 86-69.

GOST 13109-97. Elektricheskaya energiya. Trebovaniya k kachestvu elektricheskoy energii v setyakh obshschego naznacheniya [Electrical energy. Power quality requirements for electrical energy in electric utility networks]. Kiev, Gosstandart Ukrainy Publ., 1999. 35 p.

Grib O.G., Vasilchenko V.I., Gromadskiy Yu.S., Dovgalyuk O.N., Manov I.A., Rozhkov P.P., Sapryka V.A., Senderovich G.A., Shcherbakova P.G. Kontrol potrebleniya elektroenergii s uchetom yeye kachestva [Electric energy consumption control taking into account its quality]. Kharkov, KhNURE Publ., 2010. 444 p.

Kuznetsov V.G., Kurennyy E.G., Lyutyy A.P. Elektromagnitnaya sovmestimost. Nesimmetriya i nesinusoidalnost napryazheniya [Electromagnetic compatibility. Voltage unbalance and harmonic distortion]. Donetsk, Donbass Publ., 2005. 249 p.

Markvardt K.G. Energosnabzheniye elektrifitsirovannykh zheleznykh dorog [Power supply of electric railways]. Moscow, Transport Publ., 1982. 528 p.

Poliakh O.M. Zastosuvannia matryts ta hrafiv do rozrakhunku system elektropostachannia [Using the matrices and graphs for power systems evaluating]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University named after Academician V. Lazaryan], 2012, issue 42, pp. 133-137.

Sychenko V.H., Bosyi D.O. Analiz rezhymiv napruhy na pryiednanniakh tiahovykh pidstantsii zminnoho strumu [The mode of voltage analysis at AC traction substations]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University named after Academician V. Lazaryan], 2009, issue 29, pp. 82-87.

Zhezhelenko I.V., Shidlovskiy A.K., Pivnyak G.G., Sayenko Yu. L., Noyberger N.A. Elektromagnitnaya sovmestimost potrebiteley [Electromagnetic compatibility of power consumers]. Moscow, Mashinostroyeniye Publ., 2012. 351 p.

Panigrahi B.K., Sinha S.K., Mohapatra A., Dash P., Mallick M.K. A Comparative Study of Signal Processing and Pattern Recognition Approach for Power Quality Disturbance Classification. IETE Journal of Research, 2011, no. 57, pp. 5-11.

Arrillaga J., Watson N.R. Power System Harmonics. New York, John Wiley & Sons Publ., 2004, 399 p.

Bollen M.H.J., Gu I.Y.H. Signal Processing of Power Quality Disturbances. Piscataway, NJ, IEEE Press Publ., 2006. 861 p.

Zynovchenko Andriy, Xie Jian, Jank Steffen, Klier Franz. Impedances of contact lines and propagation of current harmonics. Elekrtische Bahnen , 2006, no. 5, pp. 12-17.

Sutherland P.E., Waclawiak M., McGranaghan M.F. System impacts evaluation of a single-phase traction load on a 115 kV transmission system. IEEE Transactions on power delivery, 2006, vol. 21, no. 2, pp. 837-843.


GOST Style Citations


1. Бадер, М. П. Электромагнитная совместимость / М. П. Бадер. – М. : УМК МПС РФ, 2002. – 638 с.

2. Босий, Д. О. Оптимізація керування регульованою компенсацією реактивної потужності на тягових підстанціях змінного струму / Д. О. Босий // Інформ.-керуючі системи на залізн. трансп. – 2010. – № 1. – С. 24−32.

 3. Босий, Д. О. Математичне моделювання електротягового навантаження в задачах вивчення електромагнітних процесів для систем електропостачання електричного транспорту змінного струму. / Д. О. Босий, В. Г. Сиченко // Техн. електродинаміка, тематичний вип. – 2009. – Ч. 3. − С. 86–89.

 4. ГОСТ 13109–97. Электрическая энергия. Требования к качеству электрической энергии в электрических сетях общего назначения. – Введ. 1999.01.01. – К. : Госстандарт Украины, 1999. – 35 с.

 5. Контроль потребления электроэнергии с учетом ее качества / О. Г. Гриб, В. И. Васильченко, Г. А. Сендерович и др. ; под ред. О. Г. Гриба. – Х. : ХНУРЭ, 2010. – 444 с.

 6. Кузнецов, В. Г. Электромагнитная совместимость. Несимметрия и несинусоидальность напряжения / В. Г. Кузнецов, Э. Г. Куренный, А. П. Лютый. – Донецк : Донбасс, 2005. – 249 с.

 7. Марквардт, К. Г. Энергоснабжение электрифицированных железных дорог / К. Г. Марквардт. – М. : Транспорт, 1982. – 528 c.

 8. Полях, О. М. Застосування матриць та графів до розрахунку систем електропостачання / О. М. Полях // Вісник Дніпропетр. нац. ун-ту залізн. трансп. ім. акад. В. Лазаряна. – Д., 2012. – Вип. 42. – С. 133–137.

 9. Сиченко, В. Г. Аналіз режимів напруги на приєднаннях тягових підстанцій змінного струму / В. Г. Сиченко, Д. О. Босий // Вісник Дніпропетр. нац. ун-ту залізн. трансп. ім. акад. В. Лазаряна. – Д., 2009. – Вип. 29. – С. 82–87.

 10. Электромагнитная совместимость потребителей / И. В. Жежеленко, А. К. Шидловский, Г. Г. Пивняк и др. – М. : Машиностроение, 2012. – 351 с.

 11. A Comparative Study of Signal Processing and Pattern Recognition Approach for Power Quality Disturbance Classification / B. K. Panigrahi, S. K. Sinha, A. Mohapatra et al. // IETE Journal of Research. – 2011. – № 57. – P. 5–11.

 12. Arrillaga, J. Power System Harmonics / J. Arrillaga, N. R Watson. –New York: John Wiley & Sons, 2004. – 399 p.

 13. Bollen, M. H. J.  Signal Processing of Power Quality Disturbances / M. H. J. Bollen,I. Y. H. Gu. –Piscataway: NJ, IEEE Press, 2006. – 861 p.

 14. Impedances of contact lines and propagation of current harmonics / A. Zynovchenko, Xie Jian, J. Steffen, K. Franz // Elekrtische Bahnen. – 2006. – №. 5. – P. 12–17.

 15. Sutherland, P. E. System impacts evaluation of a single-phase traction load on a 115 kV transmission system / P. E. Sutherland, M. Waclawiak, M. F. McGranaghan // IEEE Transactions on power delivery. – 2006. – Vol. 21, № 2. – P. 837–843.



DOI: https://doi.org/10.15802/stp2013/16573

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

 

ISSN 2307–3489 (Print)
ІSSN 2307–6666 (Online)