Vibro-acoustic methods in the condition assessment of power transformers: A survey
It has been over two decades since the publication of pioneer works about the power
transformer diagnostics based on monitoring of their acoustic fingerprints. Since then, there …
transformer diagnostics based on monitoring of their acoustic fingerprints. Since then, there …
Condition assessment of power OLTC by vibration analysis using wavelet transform
E Rivas, JC Burgos… - IEEE Transactions on …, 2009 - ieeexplore.ieee.org
The suitable condition of an onload tap changer (OLTC) is essential for the operation of a
power transformer. It is extremely desirable to have some indicators to assess the OLTC …
power transformer. It is extremely desirable to have some indicators to assess the OLTC …
Vibration analysis using envelope wavelet for detecting faults in the OLTC tap selector
E Rivas, JC Burgos… - IEEE Transactions on …, 2010 - ieeexplore.ieee.org
An onload tap changer (OLTC) in suitable conditions is essential for the operation of a
power transformer. It is extremely desirable to have indicators that help assess the …
power transformer. It is extremely desirable to have indicators that help assess the …
Feature extraction and selection for identifying faults in contactors using Fiber Bragg Grating
Switching devices are used in a wide application field to control and protect electrical
systems. Failures in such equipment cause a loss of reliability in electrical facilities, which …
systems. Failures in such equipment cause a loss of reliability in electrical facilities, which …
A new arc-based model and condition monitoring algorithm for on-load tap-changers
B Feizifar, O Usta - Electric Power Systems Research, 2019 - Elsevier
An on-load tap-changer (OLTC) regulates the output voltage level of transformer by
changing the winding voltage ratio without current interruption. It is one of the most …
changing the winding voltage ratio without current interruption. It is one of the most …
A Collective Condition Monitoring Algorithm for On-Load Tap-Changers
B Feizifar, Z Müller, G Fandi… - 2019 IEEE International …, 2019 - ieeexplore.ieee.org
Transformer units are widely utilized to transfer the electric power over transmission and
distribution networks efficiently. These units can be equipped with an on-load tap-changer …
distribution networks efficiently. These units can be equipped with an on-load tap-changer …
On the novel approach to the On Load Tap Changer (OLTC) diagnostics based on the observation of fractal properties of recorded vibration fingerprints
On Load Tap Changer contacts are the only movable, and thus the most sensitive part of the
power transformer. Over time several diagnostic methods for condition assessment of these …
power transformer. Over time several diagnostic methods for condition assessment of these …
Audio-based On-Load Tap Changer diagnostics: correlation of sound and vibration fingerprints
Over the years, non-invasive vibration-based On Load Tap Changer (OLTC) diagnostic
methods have become a part of standard monitoring systems. On the other hand, audio …
methods have become a part of standard monitoring systems. On the other hand, audio …
Self-organized classification of on-load tap changers acoustic signatures
EF Simas Filho, LAL de Almeida - 2008 IEEE Instrumentation …, 2008 - ieeexplore.ieee.org
On-load Tap Changers (OLTC) are widely used for voltage regulation in electricity networks.
A set of electrical contacts (taps) is used to change the transformer input/output ratio as the …
A set of electrical contacts (taps) is used to change the transformer input/output ratio as the …
[PDF][PDF] Selecting mother wavelet for wavelet analysis of on-load tap changer acoustic emission
Wavelet transformation is one of the most popular tools for acoustic signal analysis. It
provides good resolution both in time and frequency domains as well as wide choice of …
provides good resolution both in time and frequency domains as well as wide choice of …