电工技术学报2016，Vol.31Issue(10)：26-33,8.
油纸绝缘频域介电谱的修正Cole-Cole模型特征参量提取及水分含量评估方法
Characteristic Parameters Extracted From Modified Cole-Cole Model and Moisture Content Assessment Methods Study on Frequency-Domain Dielectric Spectroscopy of Oil-Paper Insulation
摘要
Abstract
In order to apply the technology of frequency-domain dielectric spectroscopy (FDS) to quantitatively assess moisture contents of oil-paper insulation for transformer, the oil paper insulation samples with different moisture contents were prepared under laboratory conditions. After analyzing the influence of moisture content on frequency-domain dielectric property of oil-paper insulation samples, this paper introduced the modified Cole-Cole model to extract the frequency-domain dielectric parameters. The effects of moisture content on frequency-domain dielectric characteristic parameters are studied, and the new quantitative relationships between the moisture content and the characteristic parameters were proposed. The results show that the moisture contents heavily affect the frequency-domain dielectric property of oil-paper insulation samples. Among the characteristic parameters extracted from modified Cole-Cole model,a relaxing time constantτa decreases and conductivityσdc increases respectively with the moisture contents m.c. increasing. The fitting results primarily show that the relationship betweenτa andm.c. is exponential, and the relationship betweenσdc andm.c. is linear. Thusτa andσdc can be taken as two characteristics for moisture content estimation.关键词
频域介电谱/油纸绝缘/水分含量/修正Cole-Cole模型/特征参量提取Key words
Frequency-domain dielectric spectroscopy/oil-paper insulation/moisture content/modified Cole-Cole model/characteristics extraction分类
信息技术与安全科学引用本文复制引用
杨丽君,高思航,高竣,刘捷丰,姚人允,刘志忠..油纸绝缘频域介电谱的修正Cole-Cole模型特征参量提取及水分含量评估方法[J].电工技术学报,2016,31(10):26-33,8.基金项目
国家自然科学基金资助项目(51277187). （51277187）
