Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field
The determination of the low-temperature plasma propagation of SF6/N2 in gas discharge will accelerate the application of SF6/N2 in advanced electrical equipment. This study investigates the positive streamer propagation characteristics of SF6/N2 by establishing a plasma discharge model and discusse...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0182720 |
| _version_ | 1797332020499578880 |
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| author | Zhen Li Yuanji Sun Longfei Zhang He Gao Yaoxin Wei Ji Liu Shengtao Li |
| author_facet | Zhen Li Yuanji Sun Longfei Zhang He Gao Yaoxin Wei Ji Liu Shengtao Li |
| author_sort | Zhen Li |
| collection | DOAJ |
| description | The determination of the low-temperature plasma propagation of SF6/N2 in gas discharge will accelerate the application of SF6/N2 in advanced electrical equipment. This study investigates the positive streamer propagation characteristics of SF6/N2 by establishing a plasma discharge model and discusses the effects of SF6 ratio on the electron density, electric field, chemical reaction rates, ion concentrations, and streamer thickness and velocity. As the streamer propagates, the shapes of the electron density and electric field become “narrower and taller.” Moreover, the ionization and attachment reaction rates increase, and the streamer thickness and velocity decrease with increasing SF6 mixing ratio and propagation time. As the SF6 ratio increases, the electric field distortion degree and particle mobility near the high-voltage electrode decrease due to the increase in the ionization and attachment rates. Consequently, the streamer velocity remains nearly unchanged, but the streamer thickness obviously decreases in the corona discharge process. In the streamer propagation process, the decrease in the streamer thickness and velocity with increasing SF6 ratio is attributed to the reduction in the electric field distortion and particle mobility, which stems from the increase in the DC breakdown voltage with the SF6 mixing ratio. The study results clarify the influence mechanisms of the SF6 mixing ratio on the particles’ spatiotemporal evolution during streamer propagation. |
| first_indexed | 2024-03-08T07:43:37Z |
| format | Article |
| id | doaj.art-10712fb63a234288b81728d244c03f0f |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-08T07:43:37Z |
| publishDate | 2024-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-10712fb63a234288b81728d244c03f0f2024-02-02T16:46:06ZengAIP Publishing LLCAIP Advances2158-32262024-01-01141015064015064-1410.1063/5.0182720Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric fieldZhen Li0Yuanji Sun1Longfei Zhang2He Gao3Yaoxin Wei4Ji Liu5Shengtao Li6Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaKey Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, People’s Republic of ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, People’s Republic of ChinaThe determination of the low-temperature plasma propagation of SF6/N2 in gas discharge will accelerate the application of SF6/N2 in advanced electrical equipment. This study investigates the positive streamer propagation characteristics of SF6/N2 by establishing a plasma discharge model and discusses the effects of SF6 ratio on the electron density, electric field, chemical reaction rates, ion concentrations, and streamer thickness and velocity. As the streamer propagates, the shapes of the electron density and electric field become “narrower and taller.” Moreover, the ionization and attachment reaction rates increase, and the streamer thickness and velocity decrease with increasing SF6 mixing ratio and propagation time. As the SF6 ratio increases, the electric field distortion degree and particle mobility near the high-voltage electrode decrease due to the increase in the ionization and attachment rates. Consequently, the streamer velocity remains nearly unchanged, but the streamer thickness obviously decreases in the corona discharge process. In the streamer propagation process, the decrease in the streamer thickness and velocity with increasing SF6 ratio is attributed to the reduction in the electric field distortion and particle mobility, which stems from the increase in the DC breakdown voltage with the SF6 mixing ratio. The study results clarify the influence mechanisms of the SF6 mixing ratio on the particles’ spatiotemporal evolution during streamer propagation.http://dx.doi.org/10.1063/5.0182720 |
| spellingShingle | Zhen Li Yuanji Sun Longfei Zhang He Gao Yaoxin Wei Ji Liu Shengtao Li Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field AIP Advances |
| title | Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field |
| title_full | Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field |
| title_fullStr | Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field |
| title_full_unstemmed | Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field |
| title_short | Effects of SF6 mixing ratio on DC positive streamer propagation in SF6/N2 gas discharge under a nonuniform electric field |
| title_sort | effects of sf6 mixing ratio on dc positive streamer propagation in sf6 n2 gas discharge under a nonuniform electric field |
| url | http://dx.doi.org/10.1063/5.0182720 |
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