Journal ArticleDOI
A Calculation Method for Impulse Voltage Distribution and Transferred Voltage in Transformer Windings
A. Miki,T. Hosoya,K. Okuyama +2 more
TLDR
In this paper, a calculation method for impulse voltage distribution in the complex winding arrangement encountered in large power transformers is presented, which takes into account the electrostatic and electromagnetic combinations of windings, and therefore permits a precise analysis of voltage response in the windings to which an impulse voltage is applied and of the transferred voltage in other windings.Abstract:
This paper presents a calculation method for impulse voltage distribution in the complex winding arrangement encountered in large power transformers. This method takes into account the electrostatic and electromagnetic combinations of windings, and, therefore, permits a precise analysis of voltage response in the windings to which an impulse voltage is applied and of the transferred voltage in other windings to which an impulse voltage is not applied directly.read more
Citations
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Journal ArticleDOI
Transfer function method to diagnose axial displacement and radial deformation of transformer windings
TL;DR: In this article, a transfer function method is presented as a tool to detect axial displacement and radial deformation of transformer windings using two test transformers and detailed mathematical models were developed for the test objects and a comparison was carried out between measured and calculated results.
Journal ArticleDOI
A Novel Online Technique to Detect Power Transformer Winding Faults
Ahmed Abu-Siada,Syed Islam +1 more
TL;DR: In this paper, a novel online technique is introduced to detect the internal faults within a power transformer by constructing the voltage-current (V - I) locus diagram to provide a current state of the transformer.
Journal ArticleDOI
Comparison of Transformer Detailed Models for Fast and Very Fast Transient Studies
TL;DR: In this article, the authors compared the two well-known multiconductor transmission line (MTL) and lumped parameter detailed (RLC ladder network) models to model the highvoltage (HV) winding of a 220/35-kV, 50-MVA transformer.
Journal ArticleDOI
Localization of Changes in a Model Winding Based on Terminal Measurements: Experimental Study
K. Ragavan,L. Satish +1 more
TL;DR: In this article, the location, extent, and type of change introduced in a model winding could be identified, based on terminal measurements, using some properties of driving point functions and adopting an iterative circuit synthesis approach.
Journal ArticleDOI
Analysis of very fast transients in transformers
Y. Shibuya,S. Fujita,E. Tamaki +2 more
TL;DR: In this article, a method to calculate the high-frequency transients in the transformer winding is developed based on multiconductor transmission-line theory, which is applicable to transients of frequencies up to several megahertz.
References
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Journal ArticleDOI
Transient Oscillations in Multiwinding Transformers
P. I. Fergestad,T. Henriksen +1 more
TL;DR: In this paper, a method of calculating voltage oscillations in transformer windings during impulse test is presented, which can be used to calculate the voltage oscillation in transformer transformers.
Journal ArticleDOI
Inductances for the Calculation of Transient Oscillations in Transformers
P. I. Fergestad,T. Henriksen +1 more
TL;DR: In this paper, the self and mutual leakage inductance of transformer windings is calculated when the iron core is taken into account, and a method of solving this problem is presented.
Journal ArticleDOI
Transformer Models for the Determination of Transient Voltages [includes discussion]
Journal ArticleDOI
Performance of traveling waves in coils and windings
TL;DR: A simplified but nevertheless rigorous conception of the wave propagation within such windings may therefore be advantageous as mentioned in this paper, and it may be used for coils in communication circuits as well. But it is not suitable for the use of windings in communication networks.
Journal ArticleDOI
A Study of the Initial Surge Distribution in Concentric Transformer Windings
TL;DR: In this paper, the initial surge distribution of transformer windings in their response to lightning surges is investigated by a systematic study, that is, by excluding the time effect, by comparing the calculations with measurements of the electric field distribution on resistance paper, some limitations in replacing the actual field problem by circuit problems are uncovered and suitable approximations are developed for obtaining a practical solution.