Proceedings ArticleDOI
Sensitive method for detection of winding deformation during short circuit test
S. Gopalakrishna,M.K. Ilampoornan,V. Jayashankar +2 more
- pp 167-170
TLDR
In this article, the authors show that optimized multisine excitation has the potential of high sensitivity towards displacement identification, and they also show that a multispectral excitation with high sensitivity has a high sensitivity toward displacement identification.Abstract:
The mechanical strength and integrity of the transformer windings is established by short circuit test. Reactance comparison method and frequency response analysis methods are conventionally used to assess the failures. Concurrent application of various high frequency excitations has also been tested. We show that optimized multisine excitation has the potential of high sensitivity towards displacement identification.read more
Citations
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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 ArticleDOI
Instrument transformer winding fault analysis using frequency response analysis
TL;DR: Frequency response analysis based testing of transformers is one of the methods that have been introduced recently that enables the identification of winding deformations resulting from the short circuit currents and winding dislocations occurring during transportation, and can be used to assess the state of electrical insulation.
Proceedings ArticleDOI
On the use of concurrent high frequency excitation during a short circuit test in a power transformer
TL;DR: In this article, a ''benchmark'' layer winding is used to validate the use of high frequency excitation and axial displacement, compression and buckling of the winding are simulated and the changes are identified.
References
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Journal ArticleDOI
Survey of excitation signals for FFT based signal analyzers
TL;DR: The properties of ten different excitation signals are studied to analyze their suitability as excitation signal for fast Fourier transform (FFT)-based signal and network analyzers and the flexibility to create a customized amplitude spectrum is investigated.
Journal ArticleDOI
Real-Time Techniques to Measure Winding Displacement in Transformers During Short-Circuit Tests
TL;DR: In this article, the authors propose new techniques for fault detection based on continual assessment during the test. They include voltage comparison, current comparison, and real/reactive power measurements, which are validated on a number of models including a voltage transformer and a distribution transformer winding.
Journal ArticleDOI
Continual Assessment of Winding Deformation during a Short Circuit Test
S. Santhi,V. Jayashankar +1 more
TL;DR: In this paper, a new approach for the continual assessment of winding deformation during short circuit test is proposed, which is validated through FEM analysis of axially unbalanced axisymmetric configurations.
Proceedings ArticleDOI
Detection of Winding Deformations During Short Time Current Tests
TL;DR: In this article, a new method of testing and analyzing winding deformation online without untanking is presented, and a comparison of Fourier transform and Wigner-Ville distribution methods of analysis is carried out.
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