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access icon free Effect of temperature on the production and diffusion behaviour of furfural in oil–paper insulation systems

  • Author(s): Jian Hao 1, 3 ; Dawai Feng 1 ; Ruijin Liao 1 ; Lijun Yang 1 ; Yuandi Lin 2
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  • Source: Volume 12, Issue 13, 31 July 2018, p. 3124 – 3129
    DOI:  10.1049/iet-gtd.2017.1571 , Print ISSN 1751-8687, Online ISSN 1751-8695
© The Institution of Engineering and Technology
Received 13/10/2017, Accepted 02/04/2018, Revised 04/03/2018, Published 04/04/2018
Errata or comment

The existing research on furfural analysis mainly focuses on the relationship between the furfural content in oil and the degree of polymerization (DP) of the paper, which are always obtained by accelerated thermal aging at high temperatures. However, the operating temperature of a winding is relatively low, approximately 60°C to 90°C. Thus, the relationship established at high temperature may be not suitable for the operating temperatures. In this research, aging tests of oil-paper systems at different temperatures ( from 100°C to 130°C) were carried out, with the DP, furfural content in oil and furfural content in paper being measured regularly to analyze the effect of temperature variation on the production and diffusion behavior of furfural in oil–paper insulation. The results show that temperature influences the production of furfural, i.e., there is no obvious difference in the amount of furfural produced by paper in the initial aging periods; however, a higher temperature results in more furfural being produced when the DP decreases to values below 600. An obvious diffusion process occurs after furfural is produced in paper in accelerated aging experiments, resulting in most of the furfural content remaining in the cellulose paper in the initial aging period.

Inspec keywords: ageing; transformer oil; life testing; power transformer insulation; power transformer testing; polymerisation; paper

Other keywords: furfural content; degree of polymerisation; temperature 100 degC to 130 degC; transformer; DP; oil-paper insulation system; diffusion behaviour; temperature 60 degC to 90 degC; cellulose paper; kraft paper; accelerated thermal ageing experiment

Subjects: Transformers and reactors; Organic insulation

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Corrigendum: Effect of temperature on the production and diffusion behaviour of furfural in oil–paper insulation systems
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