Deterioration Diagnosis for Oil-immersed Transformers

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  • Mizutani Yoshinobu
    Central Research Institute of Electric Power Industry, Electrical Engineering Research Laboratory

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  • 油入変圧器の劣化診断技術
  • アブライリ ヘンアツキ ノ レッカ シンダン ギジュツ

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Abstract

Oil-immersed transformers are to operate more long life than designed lifetime. Therefore it is necessary to maintain and replace aged transformers appropriately by applied deterioration diagnosis, to keep. In this paper, the way of deterioration for oil-immersed transformers is introduced. Examples of deterioration diagnosis technique research such as diagnosis focused on decomposition product from insulating paper, optical diagnosis and the temperature stress analysis are introduced.

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