Proceedings ArticleDOI
Effect of barrier in the propagation of partial discharge signals
Ramanujam Sarathi,I. P. Merin Sheema,V. Subramanian +2 more
- pp 249-252
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TLDR
In this paper, the location of the partial discharge source in transformer insulation was analyzed by simulation studies and the effect of the barrier on the propagation of the signal was studied, and it was observed that the signal attenuation increases with the increase in the thickness of barrier, and the arrival times of the signals at the sensors also vary depending on the available barriers.Abstract:
In the present work, the location of the partial discharge source in transformer insulation was analysed by simulation studies. The partial discharge source was modelled such that it radiates the Ultra High Frequency (UHF) signal. The time of arrival of the UHF signal and the magnitude of the UHF signal at any sensor depends on its distance from the partial discharge source. The effect of the barrier on the propagation of the signal was studied. It was observed that the signal attenuation increases with the increase in the thickness of the barrier. The arrival times of the signals at the sensors also vary depending on the available barriers. The location of the partial discharge source was analysed with and without the barrier. The time difference of arrival of the signal at the sensors was calculated based on the first peak method.read more
Citations
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Journal ArticleDOI
Identification and localisation of incipient discharges in transformer insulation adopting UHF technique
TL;DR: In this paper, the authors used cross-recurrence plots (CRP) to estimate the Time Difference Of Arrival (TDOA) of UHF signals and found that CRP can be used to estimate TDOA correctly, even with low signal to noise ratio and it is found to be superior to cross correlation technique in estimating the TDOA.
References
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Journal ArticleDOI
Review of modern diagnostic techniques for assessing insulation condition in aged transformers
TL;DR: A description of commonly used chemical diagnostics techniques along with their interpretation schemes for transformer insulation condition assessment is presented.
Journal ArticleDOI
Partial discharge monitoring of power transformers using UHF sensors. Part I: sensors and signal interpretation
TL;DR: In this article, the propagation velocity matrix (PVM) and propagation time matrix (PTM) were introduced to detect partial discharge (PD) in power transformers, which can be used to index a database of physical descriptions of the transformer that could provide additional information to assist with diagnosis.
Journal ArticleDOI
Detection and location of partial discharges in power transformers using acoustic and electromagnetic signals
TL;DR: In this article, the authors proposed an approach to estimate the arrival times of acoustic partial discharges (PD) signals in a power transformer by using robust direct solvers instead of the previously used iterative algorithms.
Journal ArticleDOI
Partial discharge diagnostics and electrical equipment insulation condition assessment
TL;DR: Partial discharge (PD) measurement has been widely applied to diagnose the condition of the electrical insulation in operating apparatus such as switchgear, transformers, cables, as well as motor and generator stator windings.
Journal ArticleDOI
Partial discharge. XIV. Acoustic partial discharge detection-practical application
TL;DR: In this article, the finer points of acoustic partial discharge (PD) detection systems and their common applications are treated, including the PD source, propagation path of the waves, the acoustic sensor, and system noise.