电工技术学报2012，Vol.27Issue(5)：50-55,6.
温度对油纸绝缘介电响应特性的影响
Effect of Temperature on Dielectric Response Characteristics of Oil Impregnated Pressboard
摘要
Abstract
To investigate temperature effect on dielectric response measurement results of transformer oil-paper insulation, and for more accurate assessment of insulation condition and moisture content in pressboard, the time-domain return voltage （RV） and frequency domain spectroscopy （FDS） experiments are designed and performed on oil-impregnated pressboard at different temperatures. The variations of characteristic parameters of RV spectra and FDS curves of the dissipation factor tanS, real capacitance C＇ and imaginary capacitance C＂ at different temperatures are compared. The changing trends and reason are analyzed. Temperature influences on evaluating moisture content and aging status with dielectric response measurements results are investigated. The results show that, with temperature increasing, the peak of RV spectrum curve shifts to shorter charging time, and peak values of both charging time and voltage decrease, tan~, C＂ curves shift to higher frequency, while the minimum values of tand and C＂ increase slightly. C＇ increases, especially in lower frequency range. It is revealed that, temperature effect on test results should be considered for evaluating moisture content and aging condition of pressboard. Otherwise, it will lead to a wrong aging judgment for on-site transformer solid insulation.关键词
温度/油纸绝缘/介电响应/微水含量/老化状态Key words
Temperature/oil-paper insulation/dielectric response/moisture content/aging status分类
信息技术与安全科学引用本文复制引用
王世强,魏建林,张冠军,杨双锁,董明,刘孝为,霍大渭..温度对油纸绝缘介电响应特性的影响[J].电工技术学报,2012,27(5):50-55,6.基金项目
国家高技术研究发展计划（863计划）（2007AA042411）,国家重点基础研究发展计划（973计划）（2009CB724505.1）和输配电装备及系统安全与新技术国家重点实验室开放课题（2007DAl0512709知5）资助项目.‘ （）
