Computation of a Single-phase Shell-Type Transformer Windings Forces Caused by Inrush and Short-circuit Currents

Sharifian, Mohammad Bagher Bannae; Esmaeilzadeh, R.; Farrokhifar, Meisam; Faiz, Jawad; Ghadimi, Mohammad; Ahrabian, G.

doi:10.3844/jcssp.2008.51.58

Cited by 8 publications

(6 citation statements)

References 13 publications

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“…These faults typically arise from short-circuits between turns within the high voltage (HV) or low voltage (LV) windings, between different layers of windings, between HV and LV windings, or even between phases within the same winding. In such cases, the resulting EMFs or mechanical forces (MFs) can cause bending or destruction of the transformer windings (11)(12)(13)(14)(15)(16). The EMF can be further categorized into two distinct components: axial force (Fx) and radial force (Fy).…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Axial and Radial Forces in Windings of Amorphous Core Transformers

Thanh,

Le,

Quoc

2024

IJE

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The aim of this study is to examine and analyze the axial and radial forces, electromagnetic forces (EMFs) acting on the low and high-voltage windings of an amorphous core transformer via the two different approaches: an analytic approach and a 3-D finite element method (FEM). Firstly, the analytic method is proposed to analyze the distribution of leakage magnetic field in the magnetic circuit and the forces acting on the transformer windings. The FEM embedded in the Ansys Maxwell tool is then proposed to compute and simulate the axial and radial forces under three different operating conditions: no-load, rated full-load, and short-circuit. The obtained results from two different methods such as the rated voltage, rated current, short-circuit current, axial and radial forces and EMFs in the low and highvoltage windings are finally compared to illustrate an agreement of methods. The validation of the methods is applied on a three-phase amorphous core transformer of 1600kVA-22/0.4kV.

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Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Axial and Radial Forces in Windings of Amorphous Core Transformers

Thanh,

Le,

Quoc

2024

IJE

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“…As a sudden short-circuit in the low-voltage winding of the transformer or a short-circuit between connected turns occurs, the magnetic flux distribution in the magnetic circuit is small, but the leakage/fringing flux in the air gap is very large. The interaction of the leakage flux and the short-circuit current in the windings will produce excessive electromagnetic forces (EMF), which cause the translation, destruction, or explosion of the windings [5,6,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…However, the distribution of the leakage magnetic field and the EMFs (𝐹 𝑥 and 𝐹 𝑦 ) in the windings were not considered. In References [3,10,12,[18][19][20][21], the distribution of leakage magnetic field, leakage reactance, and EMFs in the LV and HV windings under shortcircuit conditions were considered via the 2D-FEM. The leakage magnetic field density and average EMFs obtained from the FEM were compared with the obtained results of the analytical method.…”

Section: Introductionmentioning

confidence: 99%

Computation of electromagnetic forces in the windings of amorphous core transformers

2024

Archives of Electrical Engineering

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Electromagnetic forces generated by the short circuit current and leakage flux in low-and high-voltage windings of distribution transformers as well as amorphous core transformers will cause the translation, destruction, and explosion of the windings. Thus, the investigation of these forces plays a significant role for researchers and manufacturers. Many authors have recently used the finite element method to analyze electromagnetic forces. In this paper, an analytic model is first developed for magnetic vector potential formulations to compute the electromagnetic forces (i.e., axial and radial forces) acting on the low-and high-voltage windings of an amorphous core transformer. The finite element technique is then presented to validate the results obtained from the analytical model. The developed model is applied to an actual problem.

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“…Using magneto-static analysis in ANSYS Maxwell simulation platform, the design and modeling of a threephase core-type transformer including coil and connection points is described in detail [1]. With the finite element method of ANSYS Maxwell, core losses in 2-dimensional and 3-dimensional state of the transformer with 30 MVA power were calculated separately for 50 Hz and 60 Hz and the results were compared [2]. As a result of these comparisons, it has been shown that the core loss value for 60 Hz frequency value is higher than the core loss value at 50 Hz frequency in 2-dimensional and 3-dimensional situations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electronic circuit transformer with experimental and finite elements

Özüpak

Teke

Mamiş

2021

International Journal of Energy Applications and Technologies

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Transformers, one of the most important elements of energy transmission and distribution systems, can be produced as a result of high cost and long-term studies. It is necessary to know the mechanical, electrical and magnetic properties of a transformer in the manufacturing process. Modeling of the transformers to be designed with a reliable simulation program in order to operate at targeted values and efficiency is important in terms of ensuring test criteria and minimizing the problems that may arise later. Thanks to advanced computer techniques, it is possible to identify design errors and correct them through a simulation program. In this paper, ANSYS Maxwell 3D software based on Finite Element Method (FEM) and widely used in transformer simulation was used. With this program, it is aimed to investigate the magnetic field density, magnetic field intensity, magnetic flux lines, current density values in the coil and core of the transformer and the effects of these values on transformer losses. Considering the nominal values of the single phase 90 VA transformer, its electrical and physical values were measured by experimental studies in the laboratory environment, and the necessary parameters and values were calculated based on these measurements. The theoretically calculated values are compared with the experimental study results and the values calculated with ANSYS Maxwell program. It was observed that the experimental study results and the results of the model created in the program confirmed each other.

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Computation of a Single-phase Shell-Type Transformer Windings Forces Caused by Inrush and Short-circuit Currents

Cited by 8 publications

References 13 publications

A Comparative Analysis of Axial and Radial Forces in Windings of Amorphous Core Transformers

A Comparative Analysis of Axial and Radial Forces in Windings of Amorphous Core Transformers

Computation of electromagnetic forces in the windings of amorphous core transformers

Analysis of electronic circuit transformer with experimental and finite elements

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