PPS和PTFE油中电热老化过程中的红外光谱特性  

Infrared Spectral Characteristics of PPS and PTFE in the Electrical-Thermal Aging Process in Oil

作　　者：何东欣[1] 王伟[1] 顾杰峰[1] 陈胜科[1] 

机构地区：[1]华北电力大学高电压与电磁兼容北京重点实验室新能源电力系统国家重点实验室,北京102206

出　　处：《电工技术学报》2013年第8期26-33,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50977025)

摘　　要：变压器油纸绝缘中的绝缘纸/板在长期运行中由于性能缺陷会劣化甚至击穿。为寻找应用于变压器的新型绝缘材料,选择JPPS(聚苯硫醚)和PTFE(聚四氟乙烯)两种聚合物材料,在实验室进行110℃和130℃加速电热老化试验,与绝缘纸对比,从红外光谱角度并结合扫描电镜和力学性能分析其老化特性。本文对三种聚合物材料的各个老化阶段的试品进行大量的红外光谱测试,发现如果材料老化后的红外光谱明显地叠加变压器油的特有吸收峰则可判断材料内部浸入了变压器油,也可通过新出现的吸收峰来推断材料老化后的生成物;根据测试结果比较了红外光谱与扫描电镜的不同,发现红外光谱与材料的机械性能有较好的相关性。这些研究有助于分析PPS和PTFE两种聚合物材料的老化特性,为判断这两种材料能否成为变压器的绝缘材料提供了依据。Insulation paper and pressboard in transformer may degrade or even break down after long-time operation because of performance deficiency. In order to pursue new insulation materials applied in transformer, PPS and PTFE for electrical-thermal aging test under temperature of 110~C and 130~C in comparison with insulation paper. In this paper a lot of infrared spectral tests were made on the three kinds of materials in several aging stages, in order to analyze their electrical-thermal aging characteristics combining with scanning electron microscope（SEM） and mechanical behaviors. It was concluded that oil-immersion in material can be judged if there are transformer oil＇s specific absorption peaks in infrared spectra of material after aging, and resultants after aging can be inferred from new-generated absorption peak. Infrared spectroscopy is more relevant to material＇s mechanical behaviors, compared to SEM on the basis of test results. These findings help analyze aging characteristics of PPS and PTFE and judge whether the two materials can be transformer insulation material.

关 键 词：红外光谱 电热老化 聚苯硫醚 聚四氟乙烯 变压器 

分 类 号：TM404[电气工程—电器]