Three-phase transformer with stabilizing properties at overload currents
- Authors: Tkachuk A.A.1
-
Affiliations:
- Emperor Alexander I St. Petersburg State Transport University
- Issue: Vol 11, No 2 (2025)
- Pages: 273-290
- Section: Original studies
- URL: https://ogarev-online.ru/transj/article/view/311286
- DOI: https://doi.org/10.17816/transsyst682001
- ID: 311286
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Abstract
AIM. To determine the conditions when a three-phase transformer of a fundamentally new design has stabilizing properties and the deviation of the transformer output voltage at overload currents.
MATERIALS AND METHODS. We developed an electromagnetic design of a three-phase transformer with stabilizing properties using ELCUT software and analyzed the processes occurring in the transformer using an equivalent magnetic circuit.
RESULTS. When the rated secondary current changed by 20%, the output voltage only changed by 0.14%.
CONCLUSION. There is a need for a comprehensive assessment of the electrodynamic stability and thermal resistance of a three-phase transformer with stabilizing properties in transient processes.
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##article.viewOnOriginalSite##About the authors
Anton A. Tkachuk
Emperor Alexander I St. Petersburg State Transport University
Author for correspondence.
Email: a.a.tkachuk@mail.ru
ORCID iD: 0000-0002-6141-3568
SPIN-code: 7335-2340
Cand. Sci. (Engineering), associate professor
Russian Federation, St. PetersburgReferences
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Supplementary files
Supplementary Files
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Fig. 1. Three-phase transformer with stabilizing properties: a – general view, b – design of phase «A» of the transformer
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Fig. 2. Equivalent circuit diagram of a three-phase transformer with stabilizing properties
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Fig. 3. Equivalent circuit diagram of a transformer magnetic circuit with split rods, sectioned windings and short-circuited windings
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Fig. 4. Current dependences of voltages of secondary winding sections (curve 1 – , curve 2 – )
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Fig. 5. Current dependencies of the initial phases of the voltages of the secondary winding sections (curve 1 – , curve 2 – )
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Fig. 6. Dependence of the short-circuited winding current a) and its initial phase b) on the secondary winding current of the transformer
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Fig. 7. Current dependences of voltage changes in secondary winding sections (curve 1 – , curve 2 – )
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Fig. 8. Relative magnetic permeabilities of the subrod material (curve 1 - , curve 2 - )
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Fig. 9. External characteristics of a three-phase transformer with stabilizing properties
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