A Device for Decreasing Loss in Electric Networks Containing Unbalanced Nonlinear Load

  • Igor′ V. NAUMOV
DOI: https://doi.org/10.24160/0013-5380-2023-6-57-66
Keywords: asymmetry, non-sinusoidality, harmonics, unbalance, electric energy loss, versatile compensating device

Abstract

Matters concerned with controlling the operating modes of low-voltage electric networks are discussed. Thus, 0.4 kV electric networks are characterized by significant emission of additional current sequences generated by unbalanced nonlinear load. A versatile compensating device filtering additional power flows caused by unproductive fundamental and higher harmonic current components is proposed as a technical means minimizing the undesirable consequences of additional current load. A method and calculation software were developed, using which the operating mode of a 0.4 kV electric network section was studied with the possibility to incorporate a simulation model of the proposed device. The compensating device parameters are calculated proceeding from the unbalanced power consumption in the network section considered. By using the MATLAB software package, time diagrams visualizing the variation of the studied indicators have been obtained. The economic efficiency of the proposed versatile device for decreasing electric energy loss has been estimated.

Author Biography

Igor′ V. NAUMOV

(Irkutsk National Research Technical University, Irkutsk, Russia; Irkutsk State Agrarian University named after A. A. Yezhevsky, Irkutsk District, Russia) – Professor of the Power Supply and Electrical Engineering Dept., Dr. Sci. (Eng.), Professor.

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The author is sincerely grateful to the Head of the Department of the Altai State University, Doct. Techn. Sci., Professor A.A. Bagaev for providing data of measurements of electric energy parameters in the operating 0.4 kV electric networks of the Altai Territory.
Published
2023-04-27
Issue
No 6 (2023): Issue № 6
Section
Article