Experimental investigation into the thermal-ageing of Kraft paper and mineral insulating oil

Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316) Pub Date : 2002-04-07 DOI:10.1109/ELINSL.2002.995946

B. Pahlavanpour, M. Martins, A. de Pablo

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引用次数: 36

Abstract

The state of insulating oil in a transformer can be directly evaluated because it is easily accessible for sampling. The same is not true for insulating paper for which the condition must be evaluated using an indirect method. International experience indicates ageing of insulating paper leads to furanic compound formation;. mainly furfuraldehyde, also named furfural, or 2FAL. These compounds are soluble in the insulating oil and may be measured using a standard IEC method. However, interpretation of the results and their relation to transformer ageing is not clear. A dynamic heating experiment was conducted to examine the influence of temperature on the ageing and degradation of insulating paper in transformer oil. The furfural and gases generated were measured and their relation to paper ageing investigated. The results allow concentration of furfural in oil and furfural absorbed by paper, to be related to degree of polymerisation of the paper and to paper ageing.

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牛皮纸和矿物绝缘油热老化的实验研究

变压器绝缘油的状态可以直接评估，因为它很容易取样。对于绝缘纸来说，情况并非如此，必须用间接方法来评估。国际经验表明，绝缘纸老化会形成呋喃化合物;主要是糠醛，也称为糠醛或2FAL。这些化合物可溶于绝缘油，并可使用标准的IEC方法进行测量。然而，对结果的解释及其与变压器老化的关系尚不清楚。通过动态加热实验研究了温度对变压器油中绝缘纸老化降解的影响。测定了生成的糠醛和气体，并研究了它们与纸张老化的关系。结果表明，糠醛在油中的浓度和被纸吸收的糠醛与纸的聚合程度和纸的老化有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Record of the the 2002 IEEE International Symposium on Electrical Insulation (Cat. No.02CH37316)

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