高电压技术2016，Vol.42Issue(3)：868-875,8.DOI:10.13336/j.1003-6520.hve.20160308032
热老化过程中老化温度对油纸绝缘空间电荷特性的影响
Effect of Aging Temperature on Space Charge Characteristics in Process of Thermal Aging
摘要
Abstract
Studying the effect of aging temperature on space charge characteristics of oil-paper insulation in the different aging processes can provide experimental bases for space charge characteristics of oil-paper insulation of converter transformers while running for a long time under high temperature.Consequently, we studied the variations of space charge characteristics of oil-paper insulation with thermal aging under different ambient temperatures by using the pulsed electroacoustic method.The results show that space charge characteristics are different at different aging status, and there is no simple correspondence between the difference of space charge characteristics and the degree of aging.But the more seriously the oil-paper insulation is thermally aged, the deeper the trap energy level will be, hence more space charge is trapped, which can be speeded up by the increase of the ambient temperature.Thermal aging under different ambient temperatures will all lead to the change of real permittivity of oil-paper, which will affect space charge accumulation in return.Variations of space charge behavior and real permittivity of oil-paper insulation during thermal aging are sensitive to the ambient temperature of thermal aging, but the effect of ambient temperature does not fit the Arrhenius law very well, it may be caused by the rupture of chemical bonds and the formation of monomer chemical groups.关键词
油纸绝缘/空间电荷/电声脉冲法/温度/热老化/介电特性Key words
oil-paper insulation/space charge/pulsed electro-acoustic method/temperature/thermal aging/dielectric properties引用本文复制引用
周远翔,戴超,黄猛,陈维江,金福宝,黄建文..热老化过程中老化温度对油纸绝缘空间电荷特性的影响[J].高电压技术,2016,42(3):868-875,8.基金项目
国家重点基础研究发展计划(973计划)(2011CB209400).Project supported by National Basic Research Program of China (973 Program)(2011CB209400). （973计划）
