单酯绝缘油纸绝缘系统的热老化特性研究  

Thermal Ageing Characteristics of Monoester Insulating Oil-paper Insulation System

作　　者：黄青丹 宋浩永 王炜 陈于晴 HUANG Qingdan;SONG Haoyong;WANG Wei;CHEN Yuqing(Power test and Research Institute of Guangzhou Power Supply Bureau of Guangdong Power Grid,Guangzhou 510410,China)

机构地区：[1]广东电网有限责任公司广州供电局电力试验研究院,广东广州510410

出　　处：《绝缘材料》2022年第9期52-56,共5页Insulating Materials

基　　金：南方电网公司科技项目(GZJKJXM20170055)。

摘　　要：分别在老化温度为130℃及140℃、氮气及空气密封条件下对绝缘纸与单酯类绝缘油、矿物绝缘油组成的油纸绝缘体系进行热老化试验,并对比两种绝缘体系的热老化特性。结果表明:油纸绝缘老化后,单酯绝缘油中的酸值及水分含量均高于矿物绝缘油;氮气氛围条件下,在140℃时,单酯绝缘油相对矿物绝缘油能较大幅度的延长绝缘纸的老化寿命,但在130℃时,单酯绝缘油相对矿物绝缘油仅略微延长了绝缘纸的老化寿命;在空气条件下,两种绝缘油中绝缘纸的热老化寿命差别不大。The oil-paper insulation systems, composed of insulating paper and monoester insulating oil or mineral insulating oil, were conducted thermal ageing tests, the ageing temperature was 130℃ and 140℃, and the ageing atmosphere was nitrogen and air, respectively. The thermal ageing characteristics of two insulation systems were compared. The results show that after the ageing of oil-paper insulation, the acid value and water content of monoester insulating oil are higher than that of the mineral insulating oil. Under the nitrogen atmosphere, the monoester insulating oil can prolong the ageing life of insulating paper significantly compared with mineral insulating oil, but at 130℃, the monoester insulating oil only prolong the ageing life of insulating paper slightly compared with mineral insulating oil. There is little difference between the thermal ageing life of insulating papers in the two insulating oils under air atmosphere.

关 键 词：酯类绝缘油 单酯 热老化 拉伸强度 绝缘纸 

分 类 号：TM214[一般工业技术—材料科学与工程]