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http://dx.doi.org/10.5370/JEET.2008.3.3.293

Fuzzy Logic Application in Fault Diagnosis of Transformers Using Dissolved Gases  

Hooshmand, Rahmat-Allah (Dept. of Electrical Engineering, University of Isfahan)
Banejad, Mahdi (Faculty of Electrical and Robotic, Shahrood University of Technology)
Publication Information
Journal of Electrical Engineering and Technology / v.3, no.3, 2008 , pp. 293-299 More about this Journal
Abstract
One of the problems with the fault diagnosis of transformers based on dissolved gas is the inability to match the result of the different standards of fault diagnosis with real world standards. In this paper, the results of the different standards are analyzed using fuzzy logic and then compared with the empirical test. The proposed method is based on the standards and guidelines of the International Electrotechnical Commission (IEC), the Central Electric Generating Board (CEGB), and the American Society for Testing and Material (ASTM) and its main task is to assist the conventional gas ratio method. The comparison between the suggested method and existing methods indicates the capability of the suggested method in the on-line fault diagnosis of transformers. In addition, in some cases the existing standards are not able to diagnose the fault. For theses instances, the presented method has the potential of diagnosing the fault. In this paper, the information of three real transformers is used to show the capability of the suggested method in diagnosing the fault. The results validate the capability of the presented method in fault diagnosis of the transformer.
Keywords
Dissolved gas; Fault diagnosis of transformer; Fuzzy logic;
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