Effect of Micro Water in C4F7N/CO2 on Surface Flashover Characteristics of Epoxy Resin

被引：0
|
作者：
Wang C. [1 ]
Zhang S. [1 ]
Tong D. [1 ]
Cao R. [1 ]
Tu Y. [1 ]
Yang Y. [2 ]
机构：
[1] Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility, North China Electric Power University, Beijing
[2] China Electric Power Research Institute, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 07期
关键词：
C[!sub]4[!/sub]F[!sub]7[!/sub]N/CO[!sub]2[!/sub; control value; gas-solid insulation system; micro water; surface flashover;
D O I：
10.13336/j.1003-6520.hve.20220830
中图分类号：
学科分类号：
摘要：
Micro water in gas insulation equipment will impair the insulation performance of gas-solid insulation system composed of C4F7N/CO2 gas and epoxy resin. This paper first explores the test method of surface flashover voltage of environmental friendly gas-solid insulation system under the condition of micro water, and then tests the power frequency surface flashover voltage of C4F7N/CO2 and epoxy resin gas-solid insulation system under different air pressures and micro water contents. The results show that, under the same micro water content, the power frequency surface flashover voltage of environmental protection gas-solid insulation system increases with the increase of gas pressure, and has a certain saturation trend. Under the same air pressure, the power frequency surface flashover voltage shows a downward trend with the increase of the micro water content. When the micro water volume fraction is less than 500×10−6, the reduction range of the surface flashover voltage of the gas-solid insulation system is not more than 5.5%. When the volume fraction of micro water is 1 500×10−6, the maximum decrease of the flashover voltage along the surface of the gas-solid insulation system is 8.8%. The research can provide practical basis for the selection of micro water content control value in the engineering application of C4F7N/CO2 mixed gas insulated electrical equipment. © 2022 Science Press. All rights reserved.
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页码：2635 / 2641
页数：6
相关论文
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