DIRECT METHOD OF PARAMETERS CALCULATION FOR TWO-ELEMENT SYMMETRIZATION DEVICE FOR SINGLE-PHASE LOAD

Abstract

A new direct method was proposed for parameters calculation of two-element symmetrisation Steinmetz triangle scheme. This method does not use decomposition to symmetrical components and is based
only on the first and second Kirchhoff's laws, is more simple and straightforward. Only active load was considered, taking into account, that reactive part of the load always could be compensated by additional reactive elements, connected parallel to load. It is emphasized, based on the results obtained, about the peculiarity of this scheme, consisting in the fact, that correct scheme operation with symmetrisation effect is achieved only at respective connection of the reactive elements, in accordance with direction of voltage vectors of supply system rotation. Only at this condition it is provided the balancing effect at active load. Using direct method the characteristics of equivalent star configuration of this scheme are also investigated. Values of voltages and currents in the circuit elements for equivalent star connection are calculated, which ensure symmetrisation effect at active load. It was demonstrated, that load voltage for equivalent star connection is three times larger, than for the triangle variant. Besides, the voltage of the neutral point of equivalent star is rather high and is twice bigger, than phase voltage. Based on the results obtained, a vector diagram
of the voltages and currents of the equivalent star elements is constructed, illustrating the specific features of
equivalent star configuration in comparison with the triangle scheme. It is shown, that this circuit can be
used simultaneously as transformerless voltage multiplier.

Author Biographies

Валерий Анатольевич Бошняга, Power engineering institute of Moldova Academy of sciences

Senior scientific collaborator, Institute of Power Engineering of
Moldova Academy of sciences

Виктор Миронович Суслов, Power engineering institute of Moldova Academy of sciences

Scientific collaborator, Institute of Power Engineering of Moldova Academy of sciences

Published
2018-06-26
How to Cite
Бошняга, В., & Суслов, В. (2018). DIRECT METHOD OF PARAMETERS CALCULATION FOR TWO-ELEMENT SYMMETRIZATION DEVICE FOR SINGLE-PHASE LOAD. Electrotechnic and Computer Systems, (28(104), 39-43. https://doi.org/10.15276/eltecs.28.104.2018.04
Section
Theoretical Electrical Engineering