变压器油碳型组成对氧化安定性的影响

采用快速评定方法高压差式量热扫描(PDSC)以及NB/SH/T 0811方法对碳型组成不同的环烷基变压器油进行了氧化安定性评定,以考察变压器油芳烃含量对氧化安定性能的影响。结果表明,对于加抗氧剂变压器油,其精制深度越高、芳烃含量越低,对抗氧剂感受性越好,氧化安定性就越好。但为了平衡变压器油溶解性能和抗氧化性能,以及在抗氧剂消耗后仍具有较好的抗氧化性能,变压器油应保持一定的精制深度和一定的芳烃含量。

INFLUENCE OF CARBON TYPE COMPOSITION ON OXIDATION STABILITY OF NAPHTHENIC BASE TRANSFORMER OILS

The effect of aromatic content on the oxidation stability of naphthenic base transformer oils with different carbon type compositions were detected using high pressure differential calorimeter scans (PDSC) and NB/SH/0811 method. The experimental results show that for transformer oils with anti-oxidant, the deeper the refining depth and the lower the aromatic content, the better the anti-oxidant sensitivity, also the better the oxidation stability. But in order to balance the dissolved performance and oxidation resistance after hydrotreatment, and to have a better anti-oxidation after the consumption of anti-oxidant, it is necessary to keep a certain refining depth and contain a certain amount of aromatic hydrocarbons for hydrotreated oils.