Effect of the non-linear electric conductivity of mineral insulating oil on the dielectric strength at high DC voltage stress

被引：0

作者：

Gabler, Tobias ^{[1
]}

Backhaus, Karsten ^{[1
]}

Goetz, Thomas ^{[1
]}

Grossmann, Steffen ^{[1
]}

Fritsche, Ronny ^{[2
]}

机构：

[1] Tech Univ Dresden, Inst Elect Power Syst & High Voltage Engn, Dresden, Germany

[2] Siemens AG, Energy Management Div Transformers, Nurnberg, Germany

来源：

2018 IEEE CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA (IEEE CEIDP) | 2018年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents the non-linear and polarity-dependent electric conductivity of mineral insulating oil and its influence on the dielectric stress of oil-insulated arrangements. At various electrode arrangements major differences of several orders of magnitude in the specific electric conductivity can be measured. Furthermore, a polarity effect of the conductivity can be observed, which is mainly caused by different injection rates of homo charges. Due to their known effect on the electric field in oil-paper-insulated arrangements at high DC voltage stress, a polarity effect in the electric field distribution occurs at asymmetrical, homogeneous arrangements, which can be shown using a charge carrier-based approach. In addition, breakdown experiments at a similar homogenous, oil-paper-insulated arrangement confirm this polarity effect.

引用

页码：54 / 57

页数：4