不同芳烃种类对变压器油性能的影响

考察了不同芳烃种类对变压器油电气性能、抗氧化性能、溶解性能、抗析气性能和热物性的影响。结果表明：重芳烃、中芳烃、轻芳烃对变压器油电气性能影响由大到小的顺序为：重芳烃>中芳烃>轻芳烃；不同芳烃对基础油抗氧化性能和热物性影响不大，但中芳烃和重芳烃对抗氧剂感受性很差，而轻芳烃影响较小；溶解性能主要与芳烃含量有关，受芳烃种类影响较小，芳烃含量越高，溶解性能越好；芳烃具有良好的抗析气性，且中芳烃对基础油抗析气性的改善明显优于轻芳烃和重芳烃；在保证优异的电气性能和抗氧化性能前提下，变压器油中含适量的芳烃可改善变压器油的溶解性能和抗析气性能。

EFFECT OF AROMATIC HYDROCARBONS ON TRANSFORMER OIL PERFORMANCE

Effects of different aromatics on electrical performance, anti-oxidation, solubility, gas tendency and thermal performance of transformer oil were studied. The results showed that in certain content range, aromatics has an negative effect on electrical performance of the oil with the order of heavy aromatics>medial aromatics > light aromatics, but has little influences on oxidation stability and thermal property, while medial and heavy aromatics are less susceptible to antioxidants; the solubility of base oil is mainly affected by aromatic hydrocarbon content, independent of the type of aromatics, the higher the content, the better solubility; aromatics, especially medial aromatics shows much better gassing tendency than light and heavy aromatics. Therefore, under the premise of good electrical performance and oxidation stability, the solubility and gassing tendency of transformer oil can be improved by addition of appropriate amount of aromatics.