Experiments on Compatibility of C4F7N/CO2 Gas Mixture and Solid Materials in Ring Main Unit

被引：0

作者：

Yan X. ^{[1
]}

Gao K. ^{[1
]}

Han D. ^{[2
,3
]}

Huang Y. ^{[1
]}

Wang W. ^{[1
]}

Chen T. ^{[4
]}

机构：

[1] China Electric Power Research Institute, Haidian District, Beijing

[2] Institute of Electrical Engineering, Chinese Academy of Sciences, Haidian District, Beijing

[3] School of Engineering Sciences, University of Chinese Academy of Sciences, Shijingshan District, Beijing

[4] Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School, Guangdong Province, Shenzhen

来源：

Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 11期

关键词：

C[!sub]4[!/sub]F[!sub]7[!/sub]N/CO[!sub]2[!/sub] gas mixture; decomposition gas; gas-solid compatibility; ring main unit (RMU); solid material;

D O I：

10.13335/j.1000-3673.pst.2022.2436

中图分类号：

学科分类号：

摘要：

The eco-friendly gas of C4F7N is the main promotion of the SF6 alternative gas in the world at present. The C4F7N/CO2 gas mixture is widely applied in the ring main unit (RMU) and other equipment. In order to ensure the long-term stable operation of the RMU, it is necessary to investigate the compatibility of the C4F7N/CO2 gas mixture and the typical solid materials in the RMU. In this paper, two methods for the gas-solid compatibility testing, namely the thermal acceleration and the electro-thermal combination, are proposed. Firstly, the thermal acceleration test was carried out on the C4F7N/CO2 and its decomposition gases with the solid materials of the RMU such as metal, plastic, rubber and epoxy glass fiber. The key properties like the gas composition, the solid surface morphology, the element composition and the spectral characteristics before and after the test were compared and analyzed, obtaining the compatibility characteristics of the gas-solid material samples. Based on the sample test results, the electrified compatibility test of the whole RMU was conducted, applying the operation voltage and heating temperature to simulate the field condition. The changes of the gas compositions and the equipment insulation performance were detected. The results show that the C4F7N/CO2 gas mixture are well compatible with the solid materials of the RMU, meeting the requirements of the long-term reliable operation. The methods and principle of the gas-solid compatibility tests of the C4F7N gas mixture with the materials in the equipment provided in this paper is useful for the material selection, design and development of the eco-friendly gas-insulated power equipment, having the important practical value. © 2023 Power System Technology Press. All rights reserved.

引用

页码：4790 / 4800

页数：10

共 21 条

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