PHYSICAL MEANING OF THE «REACTIVE POWER» CONCEPT APPLIED TO THREE-PHASE ENERGY SUPPLY SYSTEMS WITH NON-LINEAR LOAD

Authors

  • George G. Zhemerov National Technical University "Kharkiv Polytechnic Institute", Ukraine
  • D. V. Tugay O.M. Beketov National University of Urban Economy in Kharkiv, Ukraine

DOI:

https://doi.org/10.20998/2074-272X.2015.6.06

Keywords:

energy supply system, reactive power, power of additional losses, the minimum possible losses, Matlab-model of three-phase energy supply system

Abstract

Purpose. The contradictions in the use of the term «reactive power» require justification by clarifying its physical meaning. The aim of the paper is to reveal the physical meaning of the term «reactive power» applied to three-phase three-wire and four-wire energy supply systems. Methodology. We have applied the modern theory of instantaneous active and reactive power, the graphical filling complex branched energy supply system of simplified design scheme, the theory of electrical circuits, computer Matlab-simulation. Results. We have provided answers to six basic questions that reveal the physical meaning and definition of the concept of «reactive power». We have justified the assumptions suggesting a universal calculation formula to determine the relative total power loss in the three-phase energy supply system as the sum of four components caused by: a minimal losses, reactive power, active power pulsations and instantaneous current flow in the neutral wire. Originality. We have developed the definition that reveals the physical meaning of the term «reactive power» for three-phase energy supply systems corresponding to modern theories of instantaneous active and reactive power. Practical value. We have proposed energy efficiency method ideas of energy supply systems with non-linear load based on the additional components of the power losses calculation. The further development of the method will allow to amend the design, selection and operation of the power active filters practices.

Author Biographies

George G. Zhemerov, National Technical University "Kharkiv Polytechnic Institute"

д.т.н., профессор, кафедра "Промышленная и биомедицинская электроника"

D. V. Tugay, O.M. Beketov National University of Urban Economy in Kharkiv

12, Revolution Str., Kharkiv, 61002, Ukraine

References

Lyon W.V. Reactive power and unbalanced circuits. Electrical world, June 1920, vol.75, no.25, рр. 1417-1420.

Budeanu C.I. Puissances réactives et fictives. Ins. Romaine de l’Energe, Bucharest, 1927, no.2.

Fryze S. Active and Apparent power in non-sinusoidal systems. Przeglad Elektrot., 1931, no.7, pp. 193-203.

Fryze S. Wirk-, Blind- und Scheinleistung in Elektrischen Stromkreisen mit Nichtsinusoidalem Verlauf von Strom und Spannung. Elect. Zeitschrift., 1932, vol.53, no.25, pp. 596-599.

Maevskiy O.A. Energeticheskie pokazateli ventilnyih preobrazovateley [Energy indicators of semiconductor converters]. Moscow, Energiya Publ., 1978. 320 p. (Rus).

Akagi H., Kanazawa Y., Nabae A. Generalized theory of the instantaneous power in three phase circuits. Int. Power Electronics Conf., Tokyo, Japan, 1983, pp.1375-1386.

Domnin I.F., Zhemerov G.G., Il'ina O.V., Tugay D.V. Compensation of instantaneous power pulsations in electric circuits with a resistive load. Tekhnichna elektrodynamika. Tem. vypusk «Problemy suchasnoyi elektrotekhniky» – Technical electrodynamics. Thematic issue «Problems of modern electrical engineering». 2006, chapter 6, pp. 36-41. (Rus).

Zhemerov G.G., Kolesnik V.Yu., Il'ina O.V. Sootnosheniya dlya preobrazovaniya koordinat obobschennyih vektorov napryazheniy i tokov trehfaznoy sistemyi elektrosnabzheniya. Spravochnoe posobie [Relations for the generalized voltages and currents vectors coordinate transformation of three-phase energy supply system. Reference manual]. Kharkiv, NTU «KhPI» Publ., 2009. 40 p. (Rus).

Zhemerov G.G., Il'ina N.A., Il'ina O.V., Koval'chuk O.I., Sokol E.I. Efficiency three-phase four-wire power supply system with an asymmetric load. Tekhnichna elektrodynamika. Tem. vypusk «Silova elektronіka i energoefektivnіst» – Technical electrodynamics. Thematic issue «Power electronics & energy efficiency», 2010, vol.1, pp. 22-31. (Rus).

Zhemerov G.G., Tugay D.V. Power losses and reactive power in three-phase power supply systems with symmetrical sinusoidal voltage source. Energosberezhenie. Energetika. Energoaudit – Energy saving. Power engineering. Energy audit, 2014, no.9(127), pp. 12-23. (Rus).

Published

2015-11-26

How to Cite

Zhemerov, G. G., & Tugay, D. V. (2015). PHYSICAL MEANING OF THE «REACTIVE POWER» CONCEPT APPLIED TO THREE-PHASE ENERGY SUPPLY SYSTEMS WITH NON-LINEAR LOAD. Electrical Engineering & Electromechanics, (6), 36–42. https://doi.org/10.20998/2074-272X.2015.6.06

Issue

Section

Electrotechnical complexes and Systems

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