摘要
天然酯变压器油因不饱和脂肪酸含量较高而易氧化,而变压器因储油罐与空气作用或密封设备产生泄漏等原因,会导致油中溶解微量的氧气。基于此,文章研究了微氧作用下天然酯变压器油的热老化特性,并分析了不同老化时间下油样的电气性能、油色谱特性以及两者之间的皮尔逊相关系数。结果表明:适时微氧作用能在一定程度上延缓天然酯变压器油电气性能的降低;天然酯变压器油纸绝缘热老化的特征气体为CO_(2)和C_(2)H_(6);天然酯变压器油的电气性能与油色谱中CO_(2)-C_(2)H_(6)(油样中溶解的CO_(2)与C_(2)H_(6)的百分比之差)之间存在强相关性。
Natural ester transformer oil is easy to oxidize due to its high content of unsaturated fatty acid,while the transformer will dissolve a small amount of oxygen in the oil due to the effect of oil tank and air or leakage of sealing equipment.On this basis,the thermal aging characteristics of natural ester transformer oil under micro-oxygenation are studied,and the electrical properties,oil chromatogram characteristics and Pearson correlation coefficient of the oil samples under different aging time are analyzed.The results show that the electrical properties of natural ester transformer oil can be delayed to some extent by the action of timely micro-oxygenation.The characteristic gases of thermal aging of oil-paper insulation of natural ester transformer are CO_(2) and C_(2)H_(6).There is a strong correlation between the electrical properties of natural ester transformer oil and CO_(2)-C_(2)H_(6)(the percentage difference between dissolved CO_(2) and C_(2)H_(6) in oil samples)in the oil chromatogram.
作者
张宗喜
刘睿
聂鸿宇
龙震泽
赵莉华
安建国
任俊文
Zhang Zongxi;Liu Rui;Nie Hongyu;Long Zhenze;Zhao Lihua;An Jianguo;Ren Junwen(Sichuan Electric Power Research Institute,Chengdu 610072,China;State Grid Guangyuan Power Supply Company,Guangyuan 628000,Sichuan,China;School of Electrical Engineering,Sichuan University,Chengdu 610065,China)
出处
《电测与仪表》
北大核心
2021年第12期63-68,共6页
Electrical Measurement & Instrumentation
基金
国家电网有限公司科技项目(521997180018)。
关键词
天然酯绝缘油
微氧作用
热老化
电气性能
油色谱
natural ester insulation oil
micro-oxygenation
thermal aging
electrical properties
oil chromatograph
