Results 31 to 40 of about 9,797 (163)

Enhancing the Diagnostic Accuracy of DGA Techniques Based on IEC-TC10 and Related Databases

IEEE Access, 2021
Investigating and enhancing the accuracy of widespread dissolved gas analysis (DGA) techniques based on IEC-TC10 and related databases was implemented. The current work aimed to help the experts to diagnose the transformers’ faults accurately. The
Osama E. Gouda, Salah Hamdy El-Hoshy, Sherif S. M. Ghoneim   +2 more
doaj   +1 more source

Fault diagnosis of transformer using artificial intelligence: A review

Frontiers in Energy Research, 2022
Transformer is one of the important components of the power system, capable of transmitting and distributing the electricity generated by renewable energy sources.
Yan Zhang, Yufeng Tang, Yongqiang Liu, Zhaowen Liang   +3 more
doaj   +1 more source

Analysis Oil Condition of Transformer PT-8801-A by Using the Method TDCG, Rogers Ratio, Key Gas, and Duval Triangle: A Case Study at PT. Perta Arun Gas

Journal of Renewable Energy, Electrical, and Computer Engineering, 2022
The power transformer would have happened disturbanced that can cause a failure at a transformer. For this condition needed to maintenance power transformer, one of which is by analyzing transformer oil by using the TDCG method. This analysis is carried out to determine the diagnosis of faults in the transformer.
Rastra Furqaranda, Andik Bintoro, Asri Asri, Waleed Khalid Ahmed Al-Ani, Ashish Shrestha   +4 more
openaire   +1 more source

Combining Contrast Invariant L1 Data Fidelities with Nonlinear Spectral Image Decomposition [PDF]

, 2017
This paper focuses on multi-scale approaches for variational methods and corresponding gradient flows. Recently, for convex regularization functionals such as total variation, new theory and algorithms for nonlinear eigenvalue problems via nonlinear ...
A Chambolle, A Haddad, A Hoover, C Brune, C Wu, C Zach, D Strong, G Bellettini, G Gilboa, G Gilboa, G Gilboa, J Yuan, JF Aujol, L Zeune, M Burger, M Burger, M Nikolova, S Osher, TF Chan, V Caselles, V Duval, W Yin, Y Dong   +22 more
core   +3 more sources

Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study

Energies, 2020
The article describes a case study when the voltage collapse during lightning impulse tests of new power transformers was noticed and when the repeated tests finished with a positive result.
Tomasz Piotrowski, Pawel Rozga, Ryszard Kozak, Zbigniew Szymanski   +3 more
doaj   +1 more source

Enhancing Diagnostic Accuracy of Transformer Faults Using Teaching-Learning-Based Optimization

IEEE Access, 2021
The early detection of the transformer faults with high accuracy rates guarantees the continuous operation of the power system networks. Dissolved gas analysis (DGA) is a technique that is used to detect or diagnose the transformer faults based on the ...
Sherif S. M. Ghoneim, Karar Mahmoud, Matti Lehtonen, Mohamed M. F. Darwish   +3 more
doaj   +1 more source

Harmonic N=2 Mechanics [PDF]

, 2009
N=2 superconformal many-body quantum mechanics in arbitrary dimensions is governed by a single scalar prepotential which determines the bosonic potential and the boson-fermion couplings.
Galajinsky, Anton, Lechtenfeld, Olaf
core   +3 more sources

Alternative Interpretation of Sharply Rising E0 Strengths in Transitional Regions

, 2004
It is shown that strong 0+2 -> 0+1 E0 transitions provide a clear signature of phase transitional behavior in finite nuclei. Calculations using the IBA show that these transition strengths exhibit a dramatic and robust increase in spherical-deformed ...
A. Arima, C. Scholl, E. A. McCutchan, F. Iachello, J. Jolie, O. Scholten, P. von Brentano, R. F. Casten, R. Krücken, T. Otsuka, V. Werner   +10 more
core   +1 more source

Detection of Incipient Faults in Power Transformers using Fuzzy Logic and Decision Tree Models Based on Dissolved Gas Analysis

ABUAD Journal of Engineering Research and Development
This paper proposes an integrated approach utilizing Fuzzy Logic and Decision Tree algorithms to diagnose early-stage faults in power transformers based on Dissolved Gas Analysis (DGA) test results of transformer insulation oil.
Felix Olowolafe, Kehinde Olukunmi Alawode   +1 more
doaj   +1 more source

Étude fonctionnelle-structurelle de deux extraits de manuels anciens de géométrie [PDF]

, 2004
Cet article vise à montrer l’utilité d’une approche fonctionnelle-structurelle pour l’étude des manuels scolaires en mathématiques. L’approche s’inspire de trois sources : la théorie des fonctions du langage de Duval, le modèle des fonctions du langage ...
Richard, Philippe R., Sierpinska, Anna
core   +1 more source