Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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DGA Interpretation of Oil Filled Transformer Condition Diagnosis

  • Alghamdi, Ali Saeed (Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi/Technical and Vocational Training Corporation, Jeddah Secondary and Vocational Institute) ;
  • Muhamad, Nor Asiah (Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi) ;
  • Suleiman, Abubakar A. (Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi/National Agency for Science and Engineering Infrastructure)
  • Received : 2012.06.12
  • Accepted : 2012.09.18
  • Published : 2012.10.25
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Abstract

DGA is one of the most recent techniques developed to diagnose the fault condition on oil filled insulation transformers. There are more than 6 known different methods of DGA fault interpretation technique and so there is the likelihood that they may vary in their interpretations. A series of combined interpretation methods that can determine the power transformer condition faults in one assessment is therefore needed. This paper presents a computer program- based system developed to combine four DGA assessment techniques; Rogers Ratio Method, IEC Basic Ratio Method, Duval Triangle method and Key Gas Method. An easy to use Graphic User Interface was designed to give a visual display of the four techniques. The result shows that this assessment method can increase the accuracy of DGA methods by up to 20% and the no prediction result had been reduced down to 0%.

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References

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