Decomposition products and formation path of C3F7CN/CO2 mixture with suspended discharge

被引：27

作者：

Wang, Cong ^{[1
]}

Ai, Xin ^{[1
]}

Zhang, Ying ^{[1
]}

Tu, Youping ^{[1
]}

Yan, Xianglian ^{[2
]}

Liu, Wei ^{[3
]}

机构：

[1] North China Elect Power Univ, Key Lab High Voltage & EMC, Beijing 102206, Peoples R China

[2] China Elect Power Res Inst, Beijing 100192, Peoples R China

[3] Anhui Elect Power Res Inst SGCC, Hefei 230022, Anhui, Peoples R China

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2019年 / 26卷 / 06期

基金：

北京市自然科学基金; 国家重点研发计划;

关键词：

suspension potential; partial discharge; density functional theory; decomposition products; GAS-MIXTURE; SF6;

D O I：

10.1109/TDEI.2019.008248

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：

A mixture of perfluoronitrile (C3F7CN) and carbon dioxide (CO2) has excellent insulation and environmental protection properties, and it is considered to have the potential to replace SF6 gas. However, there are few studies on the decomposition products and formation reasons of C3F7CN/CO2 gas under partial discharge. In order to study the decomposition characteristics of C3F7CN/CO2 gas, suspension potential was used to simulate partial discharge. The experimental study on partial discharge decomposition of C3F7CN/CO2 gas was carried out. The variation of decomposition products with discharge time was qualitatively and quantitatively analyzed by gas chromatography-mass spectrometry (GC/MS). The results show that the decomposition products of suspension discharge of C3F7CN/CO2 are mainly CF4, C2F6, C3F8, CF3CN and an unknown product. The relative contents of C2F6 remain basically unchanged with the increase of discharge time. The relative contents of CF4, C3F8 and unknown products show a non-linear growth trend with the increase of discharge time. The relative content of CF3CN gas shows a saturation trend with the increase of discharge time. Finally, based on density functional theory (DFT), the formation paths of various products are analyzed.

引用

页码：1949 / 1955

页数：7

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