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首页> 外文期刊>Dielectrics and Electrical Insulation, IEEE Transactions on >Transformer insulating oil characteristic changes observed using accelerated degradation in consideration of field transformer conditions
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Transformer insulating oil characteristic changes observed using accelerated degradation in consideration of field transformer conditions

机译：考虑到现场变压器条件，使用加速退化观察到的变压器绝缘油特性变化

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摘要

To ensure soundness of highly aged transformers in their operations, it is important to identify how aging influences insulating oil in these transformers. The characteristics of insulating oil are roughly classified into electrical, physical, and chemical characteristics. In the past research on insulating oil in transformers, some of the characteristics showed a downward trend with increasing age. Among the electrical characteristics, the volume resistivity and the dielectric loss tangent showed a downward trend with increasing age, which is likely to reflect degradation that accompanies aging. The analysis of insulating oil components found some components that increased with age, which may contribute to degrading electrical characteristics of insulating oil. This study on field transformers gave results obtained through comparison of different samples in relation to the number of years in which they were in the field. Detailed evaluation of aging requires study on aging patterns using the same samples. In this paper, heat-accelerated degradation test was conducted on the same samples, and the patterns of changes in characteristics were studied. In addition, the influences of interactions between characteristics and water and between characteristics and pressboard were examined. The study using accelerated degradation test was conducted on one brand of mineral oil (;1;1). The obtained characteristics were the breakdown voltage, volume resistivity, interfacial tension, total acid value, and water content, i.e., electrical characteristics and characteristics considered to be correlated with electrical characteristics were extracted. As a result of examination, characteristic deterioration was evident for the water content, breakdown voltage, volume resistivity, total acid value, and interfacial tension in descending order of deterioration. The characteristics showed evident deterioration in the initial stage of accelerated degradation test and, thereafter, s-n-nhowed a saturation tendency with increasing age. Index Terms ?
机译：为了确保高度老化的变压器在运行中的安全性，重要的是要确定老化如何影响这些变压器中的绝缘油。绝缘油的特性大致分为电气，物理和化学特性。在过去的变压器绝缘油研究中，某些特性随着年龄的增长呈下降趋势。在电特性中，体积电阻率和介电损耗角正切随年龄的增长而呈下降趋势，这很可能反映出随着老化而退化。对绝缘油成分的分析发现，某些成分会随着年龄的增长而增加，这可能会导致绝缘油的电气特性下降。对现场变压器的这项研究给出了通过比较不同样本与它们在该领域的年限相关的结果。详细的老化评估需要使用相同的样本研究老化模式。在本文中，对相同的样品进行了热加速降解试验，并研究了特性变化的模式。此外，还研究了特性与水之间以及特性与压纸板之间相互作用的影响。使用加速降解测试对一种品牌的矿物油（; 1; 1）进行了研究。获得的特性是击穿电压，体积电阻率，界面张力，总酸值和水含量，即，提取电特性和被认为与电特性相关的特性。检验的结果是，水含量，击穿电压，体积电阻率，总酸值和界面张力按照从大到小的降序排列而明显地特性下降。该特性在加速降解试验的初始阶段表现出明显的劣化，此后随着年龄的增长而出现s-n-n-饱和趋势。索引词？

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