The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field
Abstract Under the slow varying ambient electric field, positive leader propagation exhibits steps characterized by intense reilluminations and abrupt elongations. These steps are currently not well understood. In this work, we investigate these steps in laboratory atmospheric discharges, using a hi...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-02-01
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| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2019GL086183 |
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| _version_ | 1849322094515453952 |
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| author | Shengxin Huang Weijiang Chen Zhehao Pei Zhong Fu Liufang Wang Tianyu He Zhijun Li Jianwei Gu Kai Bian Nianwen Xiang Yu Wang |
| author_facet | Shengxin Huang Weijiang Chen Zhehao Pei Zhong Fu Liufang Wang Tianyu He Zhijun Li Jianwei Gu Kai Bian Nianwen Xiang Yu Wang |
| author_sort | Shengxin Huang |
| collection | DOAJ |
| description | Abstract Under the slow varying ambient electric field, positive leader propagation exhibits steps characterized by intense reilluminations and abrupt elongations. These steps are currently not well understood. In this work, we investigate these steps in laboratory atmospheric discharges, using a high‐speed video camera and a synchronized electrical parameter measurement system. The discharge, emitting weak light and preceding the intense reillumination, is discovered. This finding suggests that the leader channel actually restarts and extends forward before the intense reillumination, which deepens our understanding of the dynamic process of the positive leader step. The discharge before the intense reillumination contributes to the corona inception from the electrode, leading to the intense reillumination of the leader channel and the emergence of an intense corona streamer burst from the leader tip. |
| format | Article |
| id | doaj-art-ec81e9b8cf524b249ae4c60da89af3a2 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2020-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-ec81e9b8cf524b249ae4c60da89af3a22025-08-20T03:49:32ZengWileyGeophysical Research Letters0094-82761944-80072020-02-01473n/an/a10.1029/2019GL086183The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric FieldShengxin Huang0Weijiang Chen1Zhehao Pei2Zhong Fu3Liufang Wang4Tianyu He5Zhijun Li6Jianwei Gu7Kai Bian8Nianwen Xiang9Yu Wang10High Voltage Research Center China Electric Power Research Institute Beijing ChinaState Grid Corporation of China Beijing ChinaState Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaElectric Power Research Institute State Grid Anhui Electric Power Company Hefei ChinaElectric Power Research Institute State Grid Anhui Electric Power Company Hefei ChinaHigh Voltage Research Center China Electric Power Research Institute Beijing ChinaSchool of Electrical and Electronic Engineering North China Electric Power University Beijing ChinaHigh Voltage Research Center China Electric Power Research Institute Beijing ChinaState Grid Corporation of China Beijing ChinaSchool of Electrical Engineering and Automation Hefei University of Technology Hefei ChinaKey Laboratory of Hubei Province on Lightning Risk Prevention of Power Grids Wuhan NARI Limited Liability Company Wuhan ChinaAbstract Under the slow varying ambient electric field, positive leader propagation exhibits steps characterized by intense reilluminations and abrupt elongations. These steps are currently not well understood. In this work, we investigate these steps in laboratory atmospheric discharges, using a high‐speed video camera and a synchronized electrical parameter measurement system. The discharge, emitting weak light and preceding the intense reillumination, is discovered. This finding suggests that the leader channel actually restarts and extends forward before the intense reillumination, which deepens our understanding of the dynamic process of the positive leader step. The discharge before the intense reillumination contributes to the corona inception from the electrode, leading to the intense reillumination of the leader channel and the emergence of an intense corona streamer burst from the leader tip.https://doi.org/10.1029/2019GL086183leader steplightningpositive leader |
| spellingShingle | Shengxin Huang Weijiang Chen Zhehao Pei Zhong Fu Liufang Wang Tianyu He Zhijun Li Jianwei Gu Kai Bian Nianwen Xiang Yu Wang The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field Geophysical Research Letters leader step lightning positive leader |
| title | The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field |
| title_full | The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field |
| title_fullStr | The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field |
| title_full_unstemmed | The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field |
| title_short | The Discharge Preceding the Intense Reillumination in Positive Leader Steps Under the Slow Varying Ambient Electric Field |
| title_sort | discharge preceding the intense reillumination in positive leader steps under the slow varying ambient electric field |
| topic | leader step lightning positive leader |
| url | https://doi.org/10.1029/2019GL086183 |
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