自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 1    February 2007

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Application of extension method to fault diagnosis of transformer
DENG Hong-gui(邓宏贵)1, CAO Jian(曹 建)1, LUO An(罗 安)2, XIA Xiang-yang(夏向阳)3

1. School of Physics Science and Technology, Central South University, Changsha 410083, China;2. School of Electrical and Information Engineering, Hunan University, Changsha 410082, China;3. School of Electrical and Information Engineering, University of Theory and Technology,Changsha 410077, China

Abstract:A novel extension diagnosis method was proposed for enhancing the diagnosis ability of the conventional dissolved gas analysis. Based on the extension theory a matter-element model was established for qualitatively and quantitatively describing the fault diagnosis problem of power transformers. The degree of relation based on the dependent functions was employed to determine the nature and the grade of the faults in a transformer system. And the proposed method was verified with the experimental data. The results show that accuracy rate of the diagnosis method exceeds 90% and two kinds of faults can be detected at the same time.

 

Key words: power transformer; fault diagnosis; extension theory; matter-element model; dependent function

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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