Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames
In recent years, events of transmission line tripping caused by wildfires have occurred frequently in many mountain areas. In order to understand the mechanism of such events, an experimental system for simulating breakdown discharge processes of model wires induced by a simulated fire source is des...
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| Format: | Article |
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Frontiers Media S.A.
2023-03-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1117199/full |
| _version_ | 1811161626878935040 |
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| author | Siyi Chen Siyi Chen Fei You Fei You Jixiang Xu Zhenhua Wang Zhenhua Wang Yun Zhang Yaopeng Zhao Yaopeng Zhao Haoyuan Yang Haoyuan Yang Zhiqiang Jiang Zhiqiang Jiang |
| author_facet | Siyi Chen Siyi Chen Fei You Fei You Jixiang Xu Zhenhua Wang Zhenhua Wang Yun Zhang Yaopeng Zhao Yaopeng Zhao Haoyuan Yang Haoyuan Yang Zhiqiang Jiang Zhiqiang Jiang |
| author_sort | Siyi Chen |
| collection | DOAJ |
| description | In recent years, events of transmission line tripping caused by wildfires have occurred frequently in many mountain areas. In order to understand the mechanism of such events, an experimental system for simulating breakdown discharge processes of model wires induced by a simulated fire source is designed. In this experiment, propane jet flame (somewhat like eruptive fires in real wild fires) is used as a simulated flame source. By setting three different gas flow rates and five different wire-wire gaps, discharge breakdown behaviors and characteristics between two ACSR (aluminum conductors steel reinforced) segments in propane flames with three flame zones are explored. The influences of these different factors on the breakdown characteristics and mechanisms of wire-wire air gaps are analyzed. Results show that breakdown voltages increase almost linearly with the increase of wire-wire gaps in continuous zone of the flames for three gas flow rates. For a short wire-wire gap like 5.0 cm, the pilot discharge channels can be formed more easily, stably and completely under a lower voltage and weaker external ionization environment. The propane jet flame conditions are complex and affected by multiple actions like initial jet force (affected by gas flow rate), temperature distribution, soot particle, ion wind. As a result, local electric field will be distorted, a streamer channel is established dependently in different cases. These factors play individual, competitive or synergistic roles at the same time in breakdowns of real ACSR wire-wire gaps. |
| first_indexed | 2024-04-10T06:17:28Z |
| format | Article |
| id | doaj.art-879011c745224a76950d6cc51a331066 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T06:17:28Z |
| publishDate | 2023-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-879011c745224a76950d6cc51a3310662023-03-02T06:00:41ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-03-011110.3389/feart.2023.11171991117199Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flamesSiyi Chen0Siyi Chen1Fei You2Fei You3Jixiang Xu4Zhenhua Wang5Zhenhua Wang6Yun Zhang7Yaopeng Zhao8Yaopeng Zhao9Haoyuan Yang10Haoyuan Yang11Zhiqiang Jiang12Zhiqiang Jiang13Jiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaChina Southern Power Grid Extra High Voltage Power Transmission Company Wuzhou Branch, Wuzhou, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaJiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, ChinaInstitute of Fire Science and Engineering, Nanjing Tech University, Nanjing, ChinaIn recent years, events of transmission line tripping caused by wildfires have occurred frequently in many mountain areas. In order to understand the mechanism of such events, an experimental system for simulating breakdown discharge processes of model wires induced by a simulated fire source is designed. In this experiment, propane jet flame (somewhat like eruptive fires in real wild fires) is used as a simulated flame source. By setting three different gas flow rates and five different wire-wire gaps, discharge breakdown behaviors and characteristics between two ACSR (aluminum conductors steel reinforced) segments in propane flames with three flame zones are explored. The influences of these different factors on the breakdown characteristics and mechanisms of wire-wire air gaps are analyzed. Results show that breakdown voltages increase almost linearly with the increase of wire-wire gaps in continuous zone of the flames for three gas flow rates. For a short wire-wire gap like 5.0 cm, the pilot discharge channels can be formed more easily, stably and completely under a lower voltage and weaker external ionization environment. The propane jet flame conditions are complex and affected by multiple actions like initial jet force (affected by gas flow rate), temperature distribution, soot particle, ion wind. As a result, local electric field will be distorted, a streamer channel is established dependently in different cases. These factors play individual, competitive or synergistic roles at the same time in breakdowns of real ACSR wire-wire gaps.https://www.frontiersin.org/articles/10.3389/feart.2023.1117199/fullhigh voltage transmission linewildfirespropane jet diffusion flamebreakdown voltageaverage breakdown strengthleakage current |
| spellingShingle | Siyi Chen Siyi Chen Fei You Fei You Jixiang Xu Zhenhua Wang Zhenhua Wang Yun Zhang Yaopeng Zhao Yaopeng Zhao Haoyuan Yang Haoyuan Yang Zhiqiang Jiang Zhiqiang Jiang Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames Frontiers in Earth Science high voltage transmission line wildfires propane jet diffusion flame breakdown voltage average breakdown strength leakage current |
| title | Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames |
| title_full | Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames |
| title_fullStr | Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames |
| title_full_unstemmed | Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames |
| title_short | Mechanisms of air breakdowns for aluminum conductors steel reinforced wire-wire gaps induced by propane jet flames |
| title_sort | mechanisms of air breakdowns for aluminum conductors steel reinforced wire wire gaps induced by propane jet flames |
| topic | high voltage transmission line wildfires propane jet diffusion flame breakdown voltage average breakdown strength leakage current |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1117199/full |
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