The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Review on the Relationship of Dissolved Gas Analysis and Internal Inspection of Transformer

변압기 절연재료 분석과 내부점검 결과와의 상관성 연구

  • 박현주 (한전 전력연구원 환경화학분석팀) ;
  • 남창현 (한전 전력연구원 환경화학분석팀) ;
  • 정년호 (한전 전력연구원 환경화학분석팀)
  • Received : 2010.08.19
  • Accepted : 2010.09.16
  • Published : 2010.10.01
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Abstract

For reliable operation of oil-filled electrical equipment, monitoring and maintenance of insulating oil is essential. Dissolved gas analysis(DGA) is widely used for monitoring faults in high voltage electrical equipment in service. Therefore, oil analysis should be monitored regularly during its service life. KEPCO has investigated thousands of dissolved gas analysis data since 1985, and conducted studies on the relationship of gas in oil analysis and internal inspection results of transformer. As the results, KEPCO revised criteria for transformer diagnosis and has applied it since 2008. Almost of 100 cases of internal inspection results since 2001 have been investigated. This paper presents the correlation of the fault-identifying gases with faults found in actual transformers and how should we approach to internal inspection of transformer by dissolved gas analysis.

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References

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