Breakdown Characteristics of Converter Transformer Insulation under Composite AC and DC Voltage

被引：0

作者：

Wang, Yonghong ^{[1
]}

Wei, Xinlao ^{[1
]}

Chen, Qingguo ^{[1
]}

Huang, Yongrui ^{[1
]}

Nie, Hongyan ^{[1
]}

机构：

[1] Harbin Univ Sci Tech, Minist Educ, Key Lab Engn Dielect & Its Applicat, Harbin 150040, Peoples R China

来源：

ICPADM 2009: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS, VOLS 1-3 | 2009年

关键词：

converter transformer; insulation; composite AC and DC voltage; breakdown voltage;

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：

In HVDC transmission systems, the oil and oil-impregnated pressboard insulation of converter transformers is subjected to composite AC and DC voltage. Therefore, a study on breakdown characteristics of this insulation under AC, DC and composite AC and DC voltage is essential. In this paper, breakdown tests on transformer oil and oil-impregnated pressboard insulation under all kinds of those voltages have been completed and the relationship between breakdown peak voltage and AC ratio is discussed. It is shown that the breakdown field strength of transformer oil decreases with the increases of oil gap under any waveform. Breakdown peak voltage of a given oil gap has little change with the variation of AC ratio, but evident inflection point occurs in their relation curve. Breakdown peak voltage of a given oil-impregnated pressboard decreases remarkably with the increases of AC ratio.

引用

页码：634 / 637

页数：4