Proceedings ArticleDOI
Winding deformation analysis in power transformers using Finite Element Method
Saroja Kanti Sahoo,S. Gopalakrishna +1 more
- pp 341-346
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TLDR
In this paper, Finite Element Method (FEM) and Sweep Frequency Response Analysis (SFRA) are used to model deformation on a benchmark winding and obtain corresponding signatures, which are used as indices to distinguish type and location of deformation.Abstract:
Winding deformation in power transformers affects its mechanical integrity. Diagnosis of winding deformation is a necessary step towards preventing its permanent failure. Sweep Frequency Response Analysis (SFRA) is widely used to analyze the nature and extent of deformation. However, the location of deformation needs the signature from the deformed transformer at various locations, which is practically not feasible. In this paper, Finite Element Method (FEM) and SFRA are used to model deformations on a benchmark winding and obtain corresponding signatures. Different parameters derived from SFRA are used as indices to distinguish type and location of deformations.read more
Citations
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Journal ArticleDOI
Modeling frequency response of transformer winding to investigate the influence of RLC
S. Al-Ameri,Mohd Fairouz Mohd Yousof,Norhafiz Azis,S. Avinash,Mohd Aizam Talib,Ali. A. Salem +5 more
TL;DR: In this paper, the authors proposed an n-stages circuit ladder network to simulate the response of a single phase 33kV transformer winding and compared the measured response to verify the proposed model, which can give a comprehensive understanding about the effect of RLC parameters on the frequency response.
Proceedings ArticleDOI
Real-Time Monitoring & Protection of Power Transformer to Enhance Smart Grid Reliability
TL;DR: Voltage, current, and power based inrush detection and Power Differential Protection are applied and the hardware result confirms the effectiveness of the scheme for monitoring and protection of transformer.
Proceedings ArticleDOI
Optimal high frequency model for analysis of winding deformation in power transformers
TL;DR: In this article, a comparative study is made between models with different number of sections to obtain an optimal model for the high frequency behavior of power transformer, a lumped parameter equivalent circuit with multiple sections is widely used.
References
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Journal ArticleDOI
Natural Frequencies of Coils and Windings Determined by Equivalent Circuit [includes discussion]
P. A. Abetti,F. J. Maginniss +1 more
TL;DR: In this article, an equivalent circuit method is derived for the computation of all the natural frequencies of interest of both air-core and iron-core coils, which takes into account all mutual inductance linkages, which usually have been neglected in the literature.
Proceedings ArticleDOI
Transformer winding diagnostics using deformation coefficient
P. M. Joshi,S.V. Kulkarni +1 more
TL;DR: In this article, the use of terminal capacitance measurements to detect deformation in transformer windings is presented, and the deformation coefficient (DC) derived from the measurements is used to detect winding deformations.
Proceedings ArticleDOI
Online assessment of winding deformation based on optimised excitation
TL;DR: On line assessment of winding deformation in a power transformer can be performed via a bushing tap excitation with optimized high frequency excitation through a benchmark layer winding to validate the suitability of the technique.
Proceedings Article
Design margin for short circuit withstand capability in large power transformers
TL;DR: In this paper, the authors proposed a cycle-to-cycle approach for the short circuit test in a power transformer, which is a special test that establishes confidence in the designer and user in the integrity of the winding.