高压充油电缆绝缘热老化的红外光谱分析研究  

Study on the Thermal Aging of High Voltage Oil-filled Cable Insulation by Infrared Spectral Analysis

作　　者：江裕熬[1] 陈志勇[1] 高乃奎[1] 孙翔[1] 张百华[1] 彭宗仁[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《高压电器》2006年第2期102-104,108,共4页High Voltage Apparatus

摘　　要：高压充油电缆绝缘老化与其绝缘内部微观缺陷的产生和发展以及油纸劣化有着极为密切的关系。笔者以充油电缆绝缘结构为研究对象,采用红外光谱分析技术对不同热老化阶段的电缆油油样进行了理化分析。实验结果表明:利用红外光谱分析法可以测量电缆油中的糠醛含量:随着老化时间的延长,电缆纸有加速老化的趋势;油中糠醛含量与油中氢气浓度的比值(KFH)可以反映绝缘老化的危险程度。KFH饱和值越高,对充油电缆绝缘剩余寿命的危害越大。The aging of high voltage oil-filled cable insulation is closely related with the generating and developing of the micro-defaults in the insulation and to the deteriorating of the oil/paper insulation. In this paper, the high voltage oil-filled cable insulating structure is investigated, and the infrared spectral analysis is used to analyze the cable oil samples in different thermal aging stages. The experimental results show that the quantity of furfural in cable oil can be measured by infrared spectral analysis; the aging of paper insulation tends to accelerate while the aging time prolonging; and the criticality of insulation aging can be reflected by the ratio of furfural to H2 content in cable oil （KFH）. The higher the saturated value of KFH is, the greater the danger to insulation remaining life of high voltage oil-filled cable is.

关 键 词：高压充油电缆 绝缘热老化 红外光谱分析 糠醛 

分 类 号：TM855[电气工程—高电压与绝缘技术] O657[理学—分析化学]