Prediction of remaining life of the paper insulation by the analysis of new oil-soluble compounds in power transformers

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI:10.1109/CEIDP.2003.1254811

M. Lessard, M. Masse

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引用次数: 5

Abstract

The evaluation of the state of the paper insulation of a power transformer can be assessed by the analysis of specific degradation by-products of paper such as CO, CO/sub 2/ and furanic compounds. However it is still difficult to differentiate an incipient fault from the normal aging of an equipment. There is a need to develop more precise diagnostic tools. An experimental accelerated aging test conducted on kraft paper and oil samples at 150/spl deg/C, allowed us to observe the production of new oil-soluble species. New compounds analogous to furanic derivatives were detected by high performance liquid chromatography. Specific sugars such as rhamnose and mannose were also detected by high performance ionic chromatography. The evolution of some of these species are correlated with the aging of the paper (decrease of the paper polymerization degree). Their presence in samples obtained from the field leads us to believe that selected molecules could play an important role in the prediction of remaining life of power transformers.

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通过分析电力变压器中新型油溶性化合物预测纸绝缘的剩余寿命

通过分析纸张的特定降解副产物，如CO、CO/sub - 2/和呋喃化合物，可以评价电力变压器的纸张绝缘状态。然而，将设备的早期故障与正常老化区分开来仍然很困难。有必要开发更精确的诊断工具。我们对牛皮纸和油样在150℃下进行了加速老化实验，观察到了新的油溶性物质的产生。用高效液相色谱法检测到类似呋喃衍生物的新化合物。用高效离子色谱法测定鼠李糖和甘露糖等特定糖。其中一些物种的进化与纸张的老化(纸张聚合度的降低)有关。它们在野外获得的样品中的存在使我们相信，选定的分子可以在电力变压器剩余寿命的预测中发挥重要作用。

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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2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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