Comparison of Impulse Wave and Sweep Frequency Response Analysis Methods for Diagnosis of Transformer Winding Faults
Qing Yang,Peiyu Su,Yong Chen +2 more
TLDR
In this paper, a tapped transformer is designed and test platforms are built to compare winding diagnoses using the impulse wave and sweep frequency response analysis methods by recording voltage responses on both the high and low-voltage sides and calculating the respective transfer functions.Abstract:
Monitoring of winding faults is the most important item used to determine the maintenance status of a transformer. Commonly used methods for winding-fault diagnosis require the transformer to exit operation before testing and an external exciting signal, whether the transformer is malfunctioning or not. However, if an overvoltage signal can be regarded as a broadband excitation source for fault diagnosis, then the interference caused by signal injection can be eliminated without the need for additional pulse or impulse signals. In this paper, a tapped transformer is designed and test platforms are built to compare winding diagnoses using the impulse wave and sweep frequency response analysis methods by recording voltage responses on both the high- and low-voltage sides and calculating the respective transfer functions. Based on comparison of statistical indicators, it is found that the sensitivities of both methods are similar for detecting conditions of winding-ground and winding-interlayer short circuits. It is concluded that it is feasible to use a transient overvoltage monitoring system for winding-fault diagnosis.read more
Citations
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Proceedings ArticleDOI
Application of the Impulse Response of Transformer Winding for Detection of Internal Turn-to-Turn Short Circuits
TL;DR: In this paper , the authors applied the impulse voltage method for the diagnosis of turn-to-turn short circuit faults inside a transformer winding, where the input signals are a set of impulse voltages of different shapes instead of the standard ac signals of variable frequency.
Proceedings ArticleDOI
An EHV Transformer Fault Diagnosis Method based on Acoustic Perception and Pseudo-Labels Intensive Training-CNN
TL;DR: In this paper , an EHV transformer fault diagnosis method based on acoustic perception and pseudo-labels intensive training-CNN is proposed in combination with semi-supervised training, and the final accuracy rate can reach more than 92.4 percent.
Proceedings ArticleDOI
An EHV Transformer Fault Diagnosis Method based on Acoustic Perception and Pseudo-Labels Intensive Training-CNN
TL;DR: In this paper , an EHV transformer fault diagnosis method based on acoustic perception and pseudo-labels intensive training-CNN is proposed in combination with semi-supervised training, and the final accuracy rate can reach more than 92.4 percent.
Online IFRA for Identification of Power Transformer Faults Based on Pulse Compression Method
Milan Ponjavic,Sasa D. Milic +1 more
TL;DR: In this article , the most accurate method, recommended for the energy transformers diagnostic, is the frequency response analysis (FRA), in the form of two implementations, Impulse-Frequency Response Analysis (IFRA), and Sweep-frequency Response analysis (SFRA), which have their own advantages, as well as difficulties when applied to a transformer without disconnecting them from the load.
References
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Transformer Diagnostic Testing by Frequuency Response Analysis
E.P. Dick,C.C. Erven +1 more
TL;DR: In this article, a frequency response analysis (FRA) method was used to measure wind deformation in power transformers, and the results indicated that benchmark reference data was not always necessary to identify certain kinds of mechanical damage.
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Thomas Leibfried,K. Feser +1 more
TL;DR: The transfer function concept is well known as an additional method of evaluating the impulse test of power transformers in the test laboratory and another application for this method is monitoring of power transformer in service as discussed by the authors.
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