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首页> 外文期刊>Electric Power Components and Systems >Effects of Moisture on Furfural Partitioning in Oil-Paper Insulation System and Aging Assessment of Power Transformers
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Effects of Moisture on Furfural Partitioning in Oil-Paper Insulation System and Aging Assessment of Power Transformers

机译：水分对油纸绝缘系统中糠醛分配的影响及电力变压器的老化评估

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摘要

The furfural concentration in oil is a well-accepted chemical marker indicating the aging condition of power transformers. However, recent researches suggest that the furfural concentration in oil is affected by moisture, because moisture influences the furfural partitioning ratio in oil-paper insulation system. In this study, the correlation of moisture and furfural partitioning ratio was investigated. The accelerated thermal aging test and moisture absorption test were conducted to prepare oil-paper samples with different furfural and moisture concentrations. For samples with different moisture concentrations, the furfural partitioning ratios between oil and paper were compared. Results showed that samples with high humidity exhibited a high furfural mass fraction in oil. This finding implied that high humidity promoted the furfural diffusion from paper to oil. Further, the interference of moisture on aging assessment of insulation paper was analyzed. Results showed that the increase of moisture concentration in oil-paper system would significantly affect the accuracy of insulation paper aging assessment. A corrected equation for aging assessment of insulation paper with different moisture concentrations was established. Verification result showed that the equation could effectively correct the interference of moisture and enhance the accuracy of the aging assessment of insulation paper.
机译：油中的糠醛浓度是公认的化学标记，表明电力变压器的老化状况。然而，最近的研究表明，油中的糠醛浓度受水分的影响，因为水分会影响油纸绝缘系统中的糠醛分配比。在这项研究中，研究了水分和糠醛分配比的相关性。进行加速热老化试验和吸湿试验，以制备具有不同糠醛和水分浓度的油纸样品。对于水分含量不同的样品，比较了油和纸之间的糠醛分配比。结果表明，高湿度样品在油中表现出较高的糠醛质量分数。该发现暗示高湿度促进了糠醛从纸到油的扩散。此外，分析了水分对绝缘纸老化评估的影响。结果表明，油纸系统中水分浓度的增加会显着影响绝缘纸老化评估的准确性。建立了不同水分含量的绝缘纸老化评估的校正方程。验证结果表明，该方程可以有效地校正水分干扰，提高绝缘纸老化评估的准确性。

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