变压器油中抗氧化剂类型对绝缘纸热老化性能的影响  

Effect of antioxidant types in transformer oil on thermal ageing performance of insulating paper

作　　者：胡学超 薛守洪 孙利强 吴立霞 刘江 朱志平[3] HU Xuechao;XUE Shouhong;SUN Liqiang;WU Lixia;LIU Jiang;ZHU Zhiping(Inner Mongolia Power(Group)Co.,Ltd.,Inner Mongolia Power Research Institute Branch,Hohhot 010020,China;Inner Mongolia Enterprise Key Laboratory of New Power System Smart Grid,Hohhot 010020,China;School of Chemistry and Chemical Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,内蒙古呼和浩特010020 [2]内蒙古自治区新型电力系统智能电网企业重点实验室,内蒙古呼和浩特010020 [3]长沙理工大学化学化工学院,湖南长沙410114

出　　处：《绝缘材料》2023年第11期47-52,共6页Insulating Materials

基　　金：内蒙古自治区自然科学基金资助项目(2021BS05005);内蒙古电力科学研究院自筹科技项目(2021-ZC-10);内蒙古电力科学研究院自筹科技项目(2021-ZC-03)。

摘　　要：为研究变压器油中添加抗氧化剂对绝缘纸热老化性能的影响,向环烷基矿物油、绝缘纸组成的绝缘体系中分别添加T501、T531、DBP 3种抗氧化剂,抗氧化剂质量分数均为0.4%,在130℃下进行热老化试验,老化时长为600 h。每隔120 h测定绝缘油中水分含量和糠醛含量、绝缘纸中水分含量与聚合度,同时对老化绝缘纸进行FTIR、XRD、SEM、EDS表征。结果表明:添加抗氧化剂T501、T531对绝缘纸的劣化影响较小,添加抗氧化剂DBP的油中绝缘纸在老化后期劣化程度加剧;由于T531抗氧化剂具有中和、水解双重作用,对纤维素的降解起到抑制作用,T531绝缘纸的老化程度最轻。In order to study the effect of antioxidant types in transformer oil on the thermal ageing performance of insulating paper,antioxidants T501,T531,and DBP were added to the insulation system composed of naphthenic mineral oil and insulating paper,and the antioxidant mass fraction was 0.4%.The heat ageing test was carried out at 130℃for 600 h.The moisture and furfural content in the insulating oil,the moisture content and polymerization degree in the insulating paper were determined every 120 h.At the same time,the aged insulating paper was characterized by FTIR,XRD,SEM,and EDS.The results show that the addition of antioxidant T501 and T531 have little effect on the deterioration of insulating paper,and the deterioration of insulating paper in the oil with antioxidant DBP is aggravate in the late ageing stage.Since the antioxidant T531 has a combination of neutralization and hydrolysis,it inhibits the degradation process of cellulose,and the ageing degree of T351 insulating paper is the lightest.

关 键 词：油纸绝缘 热老化 抗氧化剂 微观形貌 

分 类 号：TM215[一般工业技术—材料科学与工程]