中国电机工程学报2011，Vol.31Issue(28)：144-153,10.
纳米改性变压器油-纸复合绝缘频率响应特性
Dielectric Frequency Response of Oil-paper Composite Insulation Modified by Nanoparticles
摘要
Abstract
The research on dielectric frequency response of oil-paper composite insulation modified by nanoparticles was carried out in order to seek possible way to improve insulation properties thereof. The dielectric frequency responses of oil-paper composite insulation at different temperatures and moisture contents were measured before and after nanoparticles were added within the frequency range about 10-4~106 Hz. The Cole-Cole relaxation models were established to analyze the results. And the parameters of the Cole-Cole relaxation models were obtained by least squares fitting. Then the influences of nanoparticles addition at different temperatures and moisture contents on the relaxation parameters were discussed. The results show that the established relaxation models can reflect well the dielectric frequency response of oil-paper composite insulation and the variation rules of insulation state can be indicated by the parameters of relaxation models. A new relaxation mechanism is introduced by adding nanoparticles, thus the dielectric loss of oil-paper composite insulation modified by nanoparticles is reduced within low and high frequency ranges, while the dielectric loss is increased within the frequency range of 0.1-100 Hz. And the influence is increased along with the increase of temperature and moisture content.关键词
频率响应/油纸复合绝缘/Cole—Cole模型/纳米改性/复介电常数Key words
dielectric frequency response/oil-paper composite insulation/Cole-Cole model/nanoparticles modification/complex dielectric coefficient分类
信息技术与安全科学引用本文复制引用
刘君,周利军,吴广宁..纳米改性变压器油-纸复合绝缘频率响应特性[J].中国电机工程学报,2011,31(28):144-153,10.基金项目
基金项目：四川省青年科技基金（2011JQ0009). （）
