Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives
As a widely used insulating medium, sulfur hexafluoride (SF6) is a greenhouse gas with very high global warming potential (GWP). Some carbon-fluoride gases have potential to replace SF6 in insulating applications. In order to reveal their different dielectric performance, this paper is devoted to a...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2018-08-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5043516 |
| _version_ | 1828419966591827968 |
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| author | Linlin Zhong Jiayu Wang Xiaohua Wang Mingzhe Rong |
| author_facet | Linlin Zhong Jiayu Wang Xiaohua Wang Mingzhe Rong |
| author_sort | Linlin Zhong |
| collection | DOAJ |
| description | As a widely used insulating medium, sulfur hexafluoride (SF6) is a greenhouse gas with very high global warming potential (GWP). Some carbon-fluoride gases have potential to replace SF6 in insulating applications. In order to reveal their different dielectric performance, this paper is devoted to a comparative study of dielectric breakdown properties for SF6 and four carbon-fluoride insulating gases i.e. CF3I, C2F6, C3F8, and c-C4F8 mixed with CO2, N2, and CF4 based on the numerical solution of Boltzmann equation. The electron energy distribution function (EEDF), reduced ionization coefficients α/N, reduced electron attachment coefficients η/N, and reduced critical electric field strength (E/N)cr are compared for various gas mixtures. Generally c-C4F8 presents the largest dielectric strength among the four carbon-fluoride insulating gases whichever buffer gas is mixed, while C2F6 presents the lowest dielectric strength. In terms of (E/N)cr and GWP, CF3I is a good eco-friendly insulating medium. However, with the addition of buffer gases, the (E/N)cr of CF3I mixtures declines more quickly than other mixtures. It is also found that the mixing of CF4 makes insulating mixtures depend more linearly on the proportions of buffer gas than CO2 and N2. |
| first_indexed | 2024-12-10T15:03:24Z |
| format | Article |
| id | doaj.art-9d986a4ebb65400eb73e62762fcdaa78 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-10T15:03:24Z |
| publishDate | 2018-08-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-9d986a4ebb65400eb73e62762fcdaa782022-12-22T01:44:07ZengAIP Publishing LLCAIP Advances2158-32262018-08-0188085122085122-1210.1063/1.5043516087808ADVComparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternativesLinlin Zhong0Jiayu Wang1Xiaohua Wang2Mingzhe Rong3School of Electrical Engineering, Southeast University, No 2 Sipailou, Nanjing, Jiangsu Province 210096, P. R. ChinaSchool of Electrical Engineering, Southeast University, No 2 Sipailou, Nanjing, Jiangsu Province 210096, P. R. ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, No 28 XianNing West Road, Xi'an, Shaanxi Province 710049, P. R. ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, No 28 XianNing West Road, Xi'an, Shaanxi Province 710049, P. R. ChinaAs a widely used insulating medium, sulfur hexafluoride (SF6) is a greenhouse gas with very high global warming potential (GWP). Some carbon-fluoride gases have potential to replace SF6 in insulating applications. In order to reveal their different dielectric performance, this paper is devoted to a comparative study of dielectric breakdown properties for SF6 and four carbon-fluoride insulating gases i.e. CF3I, C2F6, C3F8, and c-C4F8 mixed with CO2, N2, and CF4 based on the numerical solution of Boltzmann equation. The electron energy distribution function (EEDF), reduced ionization coefficients α/N, reduced electron attachment coefficients η/N, and reduced critical electric field strength (E/N)cr are compared for various gas mixtures. Generally c-C4F8 presents the largest dielectric strength among the four carbon-fluoride insulating gases whichever buffer gas is mixed, while C2F6 presents the lowest dielectric strength. In terms of (E/N)cr and GWP, CF3I is a good eco-friendly insulating medium. However, with the addition of buffer gases, the (E/N)cr of CF3I mixtures declines more quickly than other mixtures. It is also found that the mixing of CF4 makes insulating mixtures depend more linearly on the proportions of buffer gas than CO2 and N2.http://dx.doi.org/10.1063/1.5043516 |
| spellingShingle | Linlin Zhong Jiayu Wang Xiaohua Wang Mingzhe Rong Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives AIP Advances |
| title | Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives |
| title_full | Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives |
| title_fullStr | Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives |
| title_full_unstemmed | Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives |
| title_short | Comparison of dielectric breakdown properties for different carbon-fluoride insulating gases as SF6 alternatives |
| title_sort | comparison of dielectric breakdown properties for different carbon fluoride insulating gases as sf6 alternatives |
| url | http://dx.doi.org/10.1063/1.5043516 |
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