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The National Academy of Sciences of Ukraine

The Institute of Electrodynamics

About Institute



D.K. Makov*, A.I. Antonjuk**
National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»,
pr. Peremohy, 37, Kyiv, 03056, Ukraine,
е-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Appearance of the asymmetrical, impulsive and stochastic loadings, store inter capacitors and semiconductor modulators in three-phase networks (3phn) substantially worsens their indexes of electric power quality, in particular such static and dynamic indexes, as voltage unbalance, speed and size of its change. Development of analog-digital measuring devices for determination of unbalance of three-phase voltage of fundamental frequency is an complicated problem, as analog blocks and analog-to-digital converters of the phase channels must be realized with identical parameters. For decreasing the parameters dispersion error of phase channels it is being suggested to measure phase voltages instantaneous’ values at the output (a, b, c) clamps of the phase channels simultaneously during a period (20 ms) and to memorize it. Farther the input (A, B, C) and output (a, b, c) clamps of the phase cannels are being switched "on a ring" with a phase step of 1200. All the operations mentioned above are being executed three times. Thus a vector error caused by dispersion of parameters of the phase channels of measuring device is also being revolved with a phase step of 1200, and the vectors of the negative voltage sequence (NVS) of the fundamental frequency (NVSFF) of the 3phn are not being revolved. Therefore the next adding of the proper instantaneous values of different three tacts selects the instantaneous values of triple NVSFF of the 3phn without the parameters dispersion error of phase channels. References 12, figures 3.
Key words: three-phase voltage, direct and negative voltage sequence, electric power quality

1. Xing Li, Mei Su, Yao Sun, Handbing Dan, Wenjing Xiong. Modulation strategies based on mathematical construction method for matrix converter extending the input reactive power range. IEEE Transactions on Power Electronics. 2014. Vol. 29.No 2. Pp. 654–664. DOI:
2. Shcherba A.A., Suprunovskaya N.I., Synytsyn V.K. Ivashchenko D.S. Aperiodic and Oscillatory Processes of Capacitor Discharge at Forced Limitation of Duration. Tekhnichna elektrodynamika. 2012. No 3. Pp. 9–10. (Rus)
3. Shcherba A.A., Kosenkov V.M., Bychkov V.M. Mathematical closed model of electric and magnetic fields in the discharge chamber of an electrohydraulic installation. Surface Engineering and Applied Electrochemistry, 2015, Vol. 51, Issue 6, pp 581–588. DOI:
4. Shcherba A.A., Podoltsev O.D., Kucheriava I.М., Ushakov V.I. Computer Modeling of Electrothermal Processes and Thermomechanical Stress at Induction Heating of Moving Copper Ingots. Tekhnichna Electrodynamika. 2013. № 2. Pp. 10–18. (Rus).
5. Suprunovskaya N.I., Shcherba A.A , Ivashchenko D.S. Beletsky O.A. Processes of energy exchange between nonlinear and linear links of electric equivalent circuit of supercapacitors. Tekhnichna Elektrodynamika. 2015. No 5. Pp. 3–11. (Rus)
6. Shcherba A.A., Suprunovskaya N.I., Ivashchenko D.S. Modeling of nonlinear resistance of electro-spark load taking in to account its changes during discharge current flowing in the load and at zero current in it. Tekhnichna Elektrodynamika. 2014. No 5. Pp. 23–25. (Rus)
7. Suprunovska N., Ivashchenko D., Shcherba A. Analyzing Probabilistic Properties of Electrical Characteristics in the Circuits Containing Stochastic Load. Proc. IEEE International Conference on Intelligent Energy and Power Systems (IEPS-2016). Kyiv, Ukraine, June 7-11, 2016, Pp. 45–48.
8. State Standart of Ukraine EN 50160:2014 (EN 50160:2010, IDT). Voltage characteristics of electricity supplied by public electricity networks. Kyiv, Minekonomrozvytku Ukrainy, 2014, 27 p. (Ukr)
9. Nielsen P., Casadei D., Serra G., Tani A. Evaluation of the input current quality by three different modulation strategies for SVM controlled matrix converters with input voltage unbalance. Proc. 1st IEEE International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth (PEDES ’96). New Delhi, India, January 8-11, 1996. Vol. II. Pp. 794–800. DOI:
10. Shcherba A.A., Makov D.K. Method of Determination of Fundametal Frequency’s Symmetric Sequences and Higher Harmonics of Tree-Phase Voltage Systems. Proc. IEEE International Conference on International Conference on Intelligent Energy and Power Systems (IEPS-2014), Kyiv, Ukraine, June 2–6, 2014. Pp. 74–76.
11. Shcherba A.A., Makov D.K. Analysis of errors in meters of three-phase voltage's non-symmetry. Naukovi visti. Research bulletin NTUU KPI. 2013. No 2 (88). Pp. 39–44. (Ukr)
12. Makov D. K. New way of determining the components of the three-phase voltage. Naukovi visti. Research bulletin NTUU KPI. 2014. No 1. Pp. 14–19. (Ukr)