articleIEEE Transactions on Power DeliveryJan 1, 2004Closed access

Aging of Oil-Impregnated Paper in Power Transformers

LLL.E. LundgaardWCW. C. HansenDLD. LinhjellTPTerence Painter

SINTEF · Norwegian University of Science and Technology

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Abstract

The effects of moisture, oxygen, and acidity upon the aging of Kraft and thermally upgraded ("Insuldur/spl reg/") papers have been studied in detail. The results for Kraft are consistent with the kinetic model and parameters proposed earlier by Emsley et al., and with the principle that moisture promotes acid-hydrolysis by causing carboxylic acids to dissociate. Moisture is released during the aging of Kraft and, hence, its aging is auto-acceleratory. In contrast, Insuldur consumed moisture under the same conditions, aged more slowly, and its aging was less accelerated by added moisture. 2-Furfuraldehyde (2FAL), which is a dehydration product of pentosans and, hence, an index of moisture production, is also…

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Topics & keywords

Topics
Keywords
  • Kraft paper
  • Moisture
  • Transformer
  • Transformer oil
  • Dehydration
  • Hydrolysis
  • Chemistry
  • Pulp and paper industry
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