中文摘要：

为修正温度、水分和老化对变压器油中糠醛含量和绝缘纸老化评估的影响,该文在实验室条件下进行了加速热老化、吸潮和恒温平衡实验,制备出3种温度、4种老化程度和5种含水量组合的60组油纸绝缘样品。分别检测油、纸中的糠醛含量,计算糠醛在油纸间的分布比例,分析了温度、水分和老化对油中糠醛分布的影响并建立定量模型。研究结果表明,运行温度、绝缘含水量、老化程度的差别均会改变糠醛在油纸间的分布比例,导致油中糠醛含量的变化。油中糠醛比例与温度、水分含量正相关,与绝缘纸聚合度负相关。此外,建立了糠醛-聚合度方程,引入油中糠醛分布定量模型,结果表明该模型能够有效修正糠醛分布对绝缘纸老化评估的干扰,提高绝缘纸老化评估的准确性。

英文摘要：

In order to correct the effects of temperature, moisture and aging on furfural content in oil and aging assessment of insulation paper for power transformers, accelerated thermal aging, moisture absorption and furfural equilibrium experiments were conducted in this paper. Totally 60 groups of oil-paper samples combining 3 temperatures, 4 aging degrees and 5 moisture contents were obtained. Furfural contents in oil and paper were measured and furfural partitioning ratios in oil-paper system were calculated. The quantitative model of furfural partitioning was constructed. Results show that furfural partitioning will be affected by operation temperature, moisture content, and aging of oil-paper insulation system, leading to the change of furfural content in oil. Mass fraction of furfural in oil has positive correlations with temperature and moisture, and a negative correlation with degree of polymerization （DP） of paper. The DP-furfural equation was established and the furfural partitioning model was introduced. Results show that the model can effectively correct the interference of furfural partitioning on aging assessment of insulation paper, and improve the accuracy of aging assessment.