On parameters determination of multi-port equivalent scheme for multi-winding traction transformers

Sobczyk, Tadeusz; Hayek, J. El

doi:10.1515/aee-2015-0003

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…The second matrix can be determined by considering the field in the air zone only, assuming that the permeability of the ferromagnetic core is sufficiently high, i.e., µ Fe → ∞ . This form of relations between linked fluxes and currents allows us to create the multi-port equivalent schemes of a multi-winding transformer with an arbitrary number of windings [23,24].…”

Section: Introductionmentioning

confidence: 99%

On Simplified Calculations of Leakage Inductances of Power Transformers

Sobczyk

Jaraczewski

2020

Energies

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This paper deals with the problem of the leakage inductance calculations in power transformers. Commonly, the leakage flux in the air zone is represented by short-circuit inductance, which determines the short-circuit voltage, which is a very important factor for power transformers. That inductance is a good representation of the typical power transformer windings, but it is insufficient for multi-winding ones. This paper presents simple formulae for self- and mutual leakage inductance calculations for an arbitrary pair of windings. It follows from a simple 1D approach to analyzing the stray field using a discrete differential operator, and it was verified by the finite element method (FEM) calculation results.

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Section: Introductionmentioning

confidence: 99%

On Simplified Calculations of Leakage Inductances of Power Transformers

Sobczyk

Jaraczewski

2020

Energies

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Modelling of multi-winding transformers for short-circuit calculations in the power system – Modelling accuracy and differences in equivalent circuits

Pijarski

2023

International Journal of Electrical Power & Energy Systems

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Method of Parameters Determination for Multi-Winding Transformer Equivalent Circuit in the Form of Multi-Beam Star

Suslov

Bosneaga

2019

2019 8th International Conference on Modern Power Systems (MPS)

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For the case of transformer with a number of windings four or more, the number of pair short-circuit impedances are more than the number of beams of the corresponding star, which makes it impossible to obtain a sufficiently correct equivalent scheme in the form of a multi-beam star without electromagnetic coupling between the elements of the beams. The scope of this paper is the elaboration of the technique for determining the elements of the equivalent circuit for the replacement of a multi-winding transformer in the form of multi-beam star with mutual electromagnetic coupling between the elements of the beams, with one magnetization branch. The scope of the article is achieved by application of the formula that connects the pair short-circuit impedance of the two windings with their total own and mutual impedance. Using the matrix pseudo-inversion procedure, a technique was developed for finding the own and mutual impedances, constituting the star's beams. The new results consist in the fact that this equivalent scheme is universal and did not depend on the specific mutual arrangement of the windings. Besides, it is possible to determine the parameters of the proposed multi-beam equivalent circuit in exact accordance with the values of the pair short-circuits impedances of the transformer and is a logical continuation of the conventional equivalent scheme of three-winding transformer. In addition, the proposed algorithm ensures the positive values of the own inductive resistances of the beams (windings).

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On parameters determination of multi-port equivalent scheme for multi-winding traction transformers

Cited by 3 publications

References 3 publications

On Simplified Calculations of Leakage Inductances of Power Transformers

On Simplified Calculations of Leakage Inductances of Power Transformers

Modelling of multi-winding transformers for short-circuit calculations in the power system – Modelling accuracy and differences in equivalent circuits

Method of Parameters Determination for Multi-Winding Transformer Equivalent Circuit in the Form of Multi-Beam Star

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