Results 261 to 270 of about 642,509 (288)

Comparison of dissolved gas-in-oil analysis methods using a dissolved gas-in-oil standard

IEEE Electrical Insulation Magazine, 2011
Dissolved gas analysis (DGA) is routinely used to determine the concentrations of gases dissolved in the insulating oil of transformers. These concentrations are used to investigate and diagnose electrical or thermal faults [1]. Such faults cause the transformer oil, pressboard, and other insulating materials to de compose and generate gases, some of ...
Lelekakis, Nick, Martin, Daniel, Guo, Wenyu, Wijaya, Jaury   +3 more
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Rapid dissolved gas analysis by means of electrochemical gas sensors

Proceedings of 2002 IEEE 14th International Conference on Dielectric Liquids. ICDL 2002 (Cat. No.02CH37319), 2003
Rapid, introductory analysis of gases dissolved in insulating oil (DGA) carried out in the field can help in effective screening of faulty transformers as well as minimising number of classical laboratory chromatographic DGA tests. It is also crucial for shortening a time gap between oil sampling and its analysis.
P. Zylka, B. Mazurek
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Transformer Fault Diagnosis by Dissolved-Gas Analysis

IEEE Transactions on Industry Applications, 1980
The great majority of incipient faults occurring in power transformers gives evidence of their presence early in their developmental stages. Oil and oil-impregnated electrical insulating materials can decompose under the influence of thermal and electrical stresses generating gaseous decomposition products which dissolve in the mineral oil.
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Dissolved Gas Analysis Results in Wind Turbine Transformers

2018 Australasian Universities Power Engineering Conference (AUPEC), 2018
In recent years there have been issues of unusual dissolved gas analysis (DGA) results from routine testing of wind-turbine transformers. These are differences when compared to results from tests of standard oil-filled distribution transformers. This paper reports on a comparison of DGA test results for such transformers in Australian wind farms.The ...
Preet Singh, Trevor Blackburn
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Advances in data mining for dissolved gas analysis

Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075), 2002
This paper reports NGC's continued application and refinement of a data mining technique based on the Kohonen neural network. The technique has been applied to NGC's database of transformer dissolved gas-in-oil analysis (DGA) measurements for high voltage transformers.
D.G. Esp, A.J. McGrail
openaire   +1 more source

Performance enhancement of dissolved gas analysis using ANFIS

Third International Conference on Computational Intelligence and Information Technology (CIIT 2013), 2013
This paper presents a method for performance enhancement of Dissolved Gas Analysis through Adaptive Neuro - Fuzzy Inference System for fault detection and classification of incipient faults in power transformers. The proposed method is evaluated and results indicate that it is an effective tool for classification of incipient faults. The performance of
N. Yadaiah, N. Ravi
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Dealing with Uncertainty for Dissolved Gas Analysis

2011
This chapter presents three approaches to tackling uncertainties occurring in transformer condition assessment, including the ER approach, the hybrid FL and ER approach and the BN approach. Firstly, the methodology of transferring a transformer condition assessment problem into an MADM solution under an ER framework is presented.
W. H. Tang, Q. H. Wu
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Categorizing transformer faults via dissolved gas analysis

2017 IEEE 19th International Conference on Dielectric Liquids (ICDL), 2017
The industry at large is very proficient at diagnosing temperature within a power transformer via Dissolved Gas Analysis (DGA) and there are many tools to assist in this process, such as Duval's Triangle, Rogers Ratio, etc. However, identifying categorically where the overheating is taking place continues to remain relatively a mystery, for the most ...
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Transformer Condition Assessment Using Dissolved Gas Analysis

2011
The dissolved gas analysis (DGA) of transformers can provide an insight view related to thermal and electrical stresses during operations of oil-immersed power transformers. DGA has been practised widely to detect incipient transformer faults and can therefore prevent any further damage to transformers.
W. H. Tang, Q. H. Wu
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Dissolved gas analysis, measurements and interpretations

2018
Oil-filled power transformers were first conceived and manufactured in the mid-tolate-1800s. They were (and to this day are) an essential component of the electrical power transmission and distribution infrastructure. Power transformers perform a power conversion function.
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