The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage
Goal. Calculation-experimental determination of basic descriptions of plasma channel of leader at an electrical breakdown of long air gap in the double-electrode discharge system (DEDS) «edge-plane» by artificial electricity of high pulse voltage of positive polarity. Methodology. Bases of the theor...
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| Datum: | 2025 |
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National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine
2025
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| Назва журналу: | Electrical Engineering & Electromechanics |
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Electrical Engineering & Electromechanics| id |
eiekhpieduua-article-333031 |
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| record_format |
ojs |
| institution |
Electrical Engineering & Electromechanics |
| baseUrl_str |
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| datestamp_date |
2025-07-01T21:38:09Z |
| collection |
OJS |
| language |
English Ukrainian |
| topic |
long air gap leader discharge electrical breakdown of gap plasma channel of positive leader characteristics of positive leader |
| spellingShingle |
long air gap leader discharge electrical breakdown of gap plasma channel of positive leader characteristics of positive leader Baranov, M. I. The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| topic_facet |
long air gap leader discharge electrical breakdown of gap plasma channel of positive leader characteristics of positive leader довгий повітряний проміжок лідерний розряд електричний пробій проміжку плазмовий канал позитивного лідера характеристики позитивного лідера |
| format |
Article |
| author |
Baranov, M. I. |
| author_facet |
Baranov, M. I. |
| author_sort |
Baranov, M. I. |
| title |
The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_short |
The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_full |
The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_fullStr |
The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_full_unstemmed |
The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_sort |
main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage |
| title_alt |
Основні характеристики каналу лідера при пробої високою імпульсною напругою довгого повітряного проміжку |
| description |
Goal. Calculation-experimental determination of basic descriptions of plasma channel of leader at an electrical breakdown of long air gap in the double-electrode discharge system (DEDS) «edge-plane» by artificial electricity of high pulse voltage of positive polarity. Methodology. Bases of the theoretical electrical engineering and electrophysics, electrophysics bases of technique of high and extra-high voltage, large pulse currents and high electromagnetic fields, basis of high-voltage pulse and measuring technique. Results. The simplified electrophysics model of origin and development of positive leader is offered in the long air gap of probed DEDS, which the followings descriptions of plasma channel of this positive leader were found on the basis of: a closeness of neL charge and electric potential UeL in the head of leader; linear charge qLl of leader of plasma channel; closeness δeL of electron current ieL and this current ieL in the channel of leader; strength of high electric field outside ELe and inwardly ELi of the channel of leader; length ls of streamer area before the head of leader; maximal electron temperature TmL in plasma of channel of leader; linear active resistance RLl and active resistance RLc of channel of leader. Executed on a domestic powerful over-high voltage electrical equipment outdoors in the conditions of electrophysics laboratory high-voltage experiments with the use of standard interconnect aperiodic pulse of voltage Ue(t) of temporal shape of Tm/Tp≈200 μs/1990 μs of positive polarity for probed DEDS at a change in it of minimum length lmin of its discharge in air gap in the range of 1 m≤lmin≤4 m confirmed power and authenticity of row of the got calculation correlations for the indicated descriptions of plasma channel of positive leader which is formed and develops in this DEDS. Originality. In a complex kind calculation-experimental way the indicated basic descriptions of plasma channel of positive leader are certain in probed DEDS. By calculation way it is first rotined that on the stage of development of positive leader in atmospheric air of indicated DEDS high electric potential UeL of his spherical head with the charge of qeL≈58,7 nC has a less value (for example, UeL≈605 kV for length of his channel of lL=0,395 m at lmin=1,5 m) the radius of ReL≈0,5 mm, what high potential Ue(t)≈Ue(Td)≈611,6 kV its active metallic electrode-edge. Obtained result for the maximal electron temperature TmL≈1,639·104 K in plasma of the probed leader testifies that this plasma is thermo-ionized. Practical value. Practical application in area of industrial electrical power engineering, high-voltage pulse technique, techniques of high and extra-high voltage of the obtained new results in area of physics of gas discharge allows not only to deepen our electrophysics knowledges about a leader discharge in atmospheric air but also more grounded to choose the air insulation of power high and over-high voltage electrical power engineering and electrical engineering equipment, and also to develop different new electrical power engineering and electrophysics devices in area of industrial electrical power engineering and powerful pulse energy with enhanceable reliability and safety of their operation in the normal and emergency modes. References 49, figures 7. |
| publisher |
National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine |
| publishDate |
2025 |
| url |
http://eie.khpi.edu.ua/article/view/333031 |
| work_keys_str_mv |
AT baranovmi themaincharacteristicsoftheleaderchannelduringbreakdownofalongairgapbyhighpulsevoltage AT baranovmi osnovníharakteristikikanalulíderapriproboívisokoûímpulʹsnoûnaprugoûdovgogopovítrânogopromížku AT baranovmi maincharacteristicsoftheleaderchannelduringbreakdownofalongairgapbyhighpulsevoltage |
| first_indexed |
2025-07-17T11:50:41Z |
| last_indexed |
2025-09-17T09:27:46Z |
| _version_ |
1850412233385836544 |
| spelling |
eiekhpieduua-article-3330312025-07-01T21:38:09Z The main characteristics of the leader channel during breakdown of a long air gap by high pulse voltage Основні характеристики каналу лідера при пробої високою імпульсною напругою довгого повітряного проміжку Baranov, M. I. long air gap leader discharge electrical breakdown of gap plasma channel of positive leader characteristics of positive leader довгий повітряний проміжок лідерний розряд електричний пробій проміжку плазмовий канал позитивного лідера характеристики позитивного лідера Goal. Calculation-experimental determination of basic descriptions of plasma channel of leader at an electrical breakdown of long air gap in the double-electrode discharge system (DEDS) «edge-plane» by artificial electricity of high pulse voltage of positive polarity. Methodology. Bases of the theoretical electrical engineering and electrophysics, electrophysics bases of technique of high and extra-high voltage, large pulse currents and high electromagnetic fields, basis of high-voltage pulse and measuring technique. Results. The simplified electrophysics model of origin and development of positive leader is offered in the long air gap of probed DEDS, which the followings descriptions of plasma channel of this positive leader were found on the basis of: a closeness of neL charge and electric potential UeL in the head of leader; linear charge qLl of leader of plasma channel; closeness δeL of electron current ieL and this current ieL in the channel of leader; strength of high electric field outside ELe and inwardly ELi of the channel of leader; length ls of streamer area before the head of leader; maximal electron temperature TmL in plasma of channel of leader; linear active resistance RLl and active resistance RLc of channel of leader. Executed on a domestic powerful over-high voltage electrical equipment outdoors in the conditions of electrophysics laboratory high-voltage experiments with the use of standard interconnect aperiodic pulse of voltage Ue(t) of temporal shape of Tm/Tp≈200 μs/1990 μs of positive polarity for probed DEDS at a change in it of minimum length lmin of its discharge in air gap in the range of 1 m≤lmin≤4 m confirmed power and authenticity of row of the got calculation correlations for the indicated descriptions of plasma channel of positive leader which is formed and develops in this DEDS. Originality. In a complex kind calculation-experimental way the indicated basic descriptions of plasma channel of positive leader are certain in probed DEDS. By calculation way it is first rotined that on the stage of development of positive leader in atmospheric air of indicated DEDS high electric potential UeL of his spherical head with the charge of qeL≈58,7 nC has a less value (for example, UeL≈605 kV for length of his channel of lL=0,395 m at lmin=1,5 m) the radius of ReL≈0,5 mm, what high potential Ue(t)≈Ue(Td)≈611,6 kV its active metallic electrode-edge. Obtained result for the maximal electron temperature TmL≈1,639·104 K in plasma of the probed leader testifies that this plasma is thermo-ionized. Practical value. Practical application in area of industrial electrical power engineering, high-voltage pulse technique, techniques of high and extra-high voltage of the obtained new results in area of physics of gas discharge allows not only to deepen our electrophysics knowledges about a leader discharge in atmospheric air but also more grounded to choose the air insulation of power high and over-high voltage electrical power engineering and electrical engineering equipment, and also to develop different new electrical power engineering and electrophysics devices in area of industrial electrical power engineering and powerful pulse energy with enhanceable reliability and safety of their operation in the normal and emergency modes. References 49, figures 7. Надані результати розрахунково-експериментального визначення основних характеристик плазмового каналу позитивного лідера при електричному пробої довгого повітряного проміжку двоелектродної розрядної системи (ДЕРС) «вістря-площина» стандартним комутаційним аперіодичним імпульсом високої напруги часової форми Tm/Td≈200 мкс/1990 мкс позитивної полярності. Запропоновано спрощену електрофізичну модель виникнення і розвитку позитивного лідера в довгому розрядному повітряному проміжку досліджуваної ДЕРС, на основі якої у комплексному вигляді були знайдені наступні основні характеристики плазмового каналу даного позитивного лідера: густина neL електронів і електричний потенціал UeL в головці лідера; погонний заряд qLl лідерного плазмового каналу; густина δeL електронного струму ieL і цей струм ieL в каналі лідера; напруженості сильного електричного поля всередині ELi і зовні ELe каналу лідера; довжина ls стримерної зони перед головкою лідера; максимальна електронна температура TmL в плазмі каналу лідера; погонний активний опір RLl і повний активний опір RLc каналу лідера. Виконані на вітчизняному потужному надвисоковольтному електрообладнанні на відкритому повітрі в умовах електрофізичної лабораторії високовольтні експерименти підтвердили працездатність і достовірність низки отриманих розрахункових співвідношень для вказаних характеристик плазмового каналу позитивного лідера електричного розряду, який формується і розвивається в цій високовольтній повітряній ДЕРС. Бібл. 49, рис. 7. National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine 2025-07-02 Article Article Peer-reviewed Article application/pdf application/pdf http://eie.khpi.edu.ua/article/view/333031 10.20998/2074-272X.2025.4.08 Electrical Engineering & Electromechanics; No. 4 (2025); 59-71 Электротехника и Электромеханика; № 4 (2025); 59-71 Електротехніка і Електромеханіка; № 4 (2025); 59-71 2309-3404 2074-272X en uk http://eie.khpi.edu.ua/article/view/333031/321958 http://eie.khpi.edu.ua/article/view/333031/321959 Copyright (c) 2025 M. I. Baranov http://creativecommons.org/licenses/by-nc/4.0 |