Breakdown Characteristics of Ester Liquids under DC Voltage

被引：1
|
作者：
Zhao, Yaohong [1 ]
Li, Huaqiang [2 ]
Qian, Yihua [1 ]
Zhang, Chen [2 ]
Zhong, Lisheng [2 ]
Wang, Qing [1 ]
机构：
[1] Guangdong Power Grid Co Ltd, Elect Power Res Inst, Guangdong Key Lab Elect Power Equipment Reliabil, Guangzhou, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian, Peoples R China
来源：
2022 IEEE 21ST INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL) | 2022年
关键词：
Vegetable oil; Nature ester; Breakdown; Ester liquids; DC voltage; NATURAL ESTER; TRANSFORMER LIQUIDS; SYNTHETIC ESTER; MINERAL-OIL;
D O I：
10.1109/ICDL49583.2022.9830928
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：
Converter transformer is an important equipment of high-voltage DC power grid. Mineral insulating oil is traditionally used as liquid insulation of transformer, and the insulating oil bears a certain DC component in the converter transformer. Ester liquids is environment-friendly insulating liquids, which mainly includes natural ester, synthetic ester and mono ester. Its application to converter transformer can improve the environmental protection properties of transformer. In this paper, the DC breakdown voltage which include positive and negative polarity of three ester liquids and mineral insulating oil in needle plate electrode under small and medium gap(1-25 mm) is analyzed. The results show that under the positive DC voltage, the breakdown voltage of ester liquids and mineral oil shows a complex law, while under the negative DC voltage, the breakdown voltage of mineral oil is significantly higher than that of ester liquids, and all ester liquids is close.
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页数：4
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