南方电网技术2017，Vol.11Issue(6)：42-48,7.DOI:10.13648/j.cnki.issn1674-0629.2017.06.007
温度对油浸式套管Cole-Cole介电模型参数的影响
Influence of Temperature on Cole-Cole Dielectric Model Parameters of Oil-Immersed Bushing
王科 1陈雪骄 2徐肖伟 1刘光祺 1邹德旭1
作者信息
- 1. 云南电网有限责任公司电力科学研究院,昆明650217
- 2. 西南交通大学电气工程学院,成都610031
- 折叠
摘要
Abstract
In order to make better use of the Cole-Cole dielectric mathematic model to diagnose the damp-state of oil-immersed bushing, it is necessary to analyze the effect of temperature on the Cole-Cole dielectric model paremeters of oil-immersed bushing.In this paper, 72.5 kV oil-immersed bushings are produced in laboratory, and the frequency-domain dielectric response tests of oil-immersed bushings are carried out at different test temperatures.The experimental data are fitted by using the modified double relaxation Cole-Cole dielectric model, and the influence of temperature variation on the Cole-Cole dielectric model parameters is analyzed.Results show that the relationship between the DC conductivity σdc and the thermodynamic temperature T in the Cole-Cole dielectric model of oil-immersed bushing is consistent with that in transformer, the Arrhenius relation is satisfied;however, the relaxation time and relaxation strength are quite different from those of transformer;the relaxation time τ1 decreases exponentially with the increase of test temperature;τ2 decreases with the temperature rise and there is a slowdown in the process of change;the relaxation strength Δε1 exponentially increases with the increase of test temperature;Δε2 shows a tendency to increase first, then decreases and then increases with the increase of test temperature.关键词
油浸式套管/温度/频域介电谱/Cole-Cole介电模型Key words
oil-immersed bushing/temperature/frequency domain spectroscopy/Cole-Cole dielectric model分类
信息技术与安全科学引用本文复制引用
王科,陈雪骄,徐肖伟,刘光祺,邹德旭..温度对油浸式套管Cole-Cole介电模型参数的影响[J].南方电网技术,2017,11(6):42-48,7.
