Breakdown Characteristics of Transformer Oil at Low Temperature in Complicated Voltage

被引：0
|
作者：
Guo C. [1 ,2 ]
Chi M. [1 ,2 ]
Chen Q. [1 ,2 ]
Zhang J. [1 ,2 ]
Gao Z. [3 ]
机构：
[1] Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin
[2] National Demonstration Center for Experimental Electrical Engineering Education, Harbin University of Science and Technology, Harbin
[3] State Grid Heilongjiang Electric Power Research Institute, Harbin
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 02期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Breakdown field strength; Compound electric field; Converter transformer; Low temperature; Moisture; Transformer oil;
D O I：
10.13336/j.1003-6520.hve.20190130019
中图分类号：
学科分类号：
摘要：
In order to study the influences of moisture and compound electric field on breakdown characteristics of transformer oil at low temperatures, we established an experimental system which could run at low temperatures and carried out breakdown experiments of transformer oil with different moisture under compound electric field between -40℃ and 20℃. The results show that with the temperature decreasing, the breakdown strength of low moisture transformer oil increases, however, the breakdown strength of high moisture transformer oil first decreases and then increases under a compound electric field, and the minimums will distribute between -10℃ and 0℃. The breakdown strength of transformer oil significantly reduces with the enhancement of moisture between -10℃ and 20℃, and the temperature according to minimum breakdown strength of high moisture transformer oil moves to the high temperature direction. The breakdown strength of different moisture transformer oil decreases with the increasing of DC content. The increase of moisture weakens the influences of DC content to breakdown strength. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：492 / 498
页数：6
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