CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER
Purpose. The complex approach to calculating thunderstorm overvoltage on substation equipment is considered when lightning strikes in a lightning rod. Methodology. The conditions of safe passage of lightning current through a lightning arrester are formulated. Results. It is shown that the calculati...
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| Дата: | 2019 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English Ukrainian |
| Опубліковано: |
National Technical University "Kharkiv Polytechnic Institute" and State Institution “Institute of Technical Problems of Magnetism of the National Academy of Sciences of Ukraine”
2019
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| Онлайн доступ: | http://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11 |
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| Назва журналу: | Electrical Engineering & Electromechanics |
Репозиторії
Electrical Engineering & Electromechanics| id |
eiekhpieduua-article-171463 |
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eiekhpieduua-article-1714632019-06-25T12:05:34Z CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER РАСЧЕТНАЯ ОЦЕНКА ПЕРЕНАПРЯЖЕНИЙ НА ИЗОЛЯЦИИ ОБОРУДОВАНИЯ ПОДСТАНЦИИ ПРИ УДАРЕ МОЛНИИ В ЕЕ МОЛНИЕОТВОД Nizhevskyi, I. V. Nizhevskyi, V. I. грозовые перенапряжения подстанция молниеотвод вольт-секундная характеристика гирлянда изоляторов электрическое поле воздушный промежуток допустимое напряжение корпус трансформатора импульсная электрическая прочность 621.316.93 lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength 621.316.93 Purpose. The complex approach to calculating thunderstorm overvoltage on substation equipment is considered when lightning strikes in a lightning rod. Methodology. The conditions of safe passage of lightning current through a lightning arrester are formulated. Results. It is shown that the calculation of the permissible length of air insulating gaps in the substation is based on the breakdown of the air tension, which is assumed to be 500 kV/m. This leads to an error in calculating the length of the air gap and, as a consequence, the probability of its breakdown, the value of which is used to calculate the indicator of the lightning resistance of the substation. A technique is proposed for calculating the permissible voltage on the transformer case when a lightning strike strikes the lightning receptacle of the transformer portal. On the basis of the nonlinear pulsed electric strength of the ground, the specified minimum permissible ground distance between the grounding rod of the lightning rod and the nearest point of the protected device is obtained. Originality. Refined calculation of the length of the minimum breakdown gap in the air and in the ground. Practical value. The proposed approach makes it possible to calculate thunderstorm overvoltage on substation equipment. Разработан инженерный подход к расчету грозовых перенапряжений на оборудовании подстанции при ударе молнии в молниеотвод. Сформулированы условия безопасного для оборудования прохождения тока молнии по молниеотводу. Показано, что расчет допустимой длины воздушных изоляционных промежутков на подстанции базируется на основе пробивной напряженности воздуха, которая принята равной 500 кВ/м. Это приводит к ошибке расчета длины воздушного промежутка и, как следствие, вероятности его пробоя, значение которой используется для расчета показателя грозоупорности подстанции. В качестве примера рассмотрена методика расчета допустимого напряжения на корпусе трансформатора при ударе молнии в молниеприемник трансформаторного портала. На основе нелинейной импульсной электрической прочности грунта получено уточненное минимальное допустимое расстояние в земле между заземлителем молниеотвода и ближайшей к нему точкой защищаемого устройства. Приводятся аналитические выражения для расчетов. National Technical University "Kharkiv Polytechnic Institute" and State Institution “Institute of Technical Problems of Magnetism of the National Academy of Sciences of Ukraine” 2019-06-25 Article Article application/pdf application/pdf http://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11 10.20998/2074-272X.2019.3.11 Electrical Engineering & Electromechanics; No. 3 (2019); 67-73 Электротехника и Электромеханика; № 3 (2019); 67-73 Електротехніка і Електромеханіка; № 3 (2019); 67-73 2309-3404 2074-272X en uk http://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11/171145 http://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11/171146 Copyright (c) 2019 I. V. Nizhevskyi, V. I. Nizhevskyi https://creativecommons.org/licenses/by-nc/4.0 |
| institution |
Electrical Engineering & Electromechanics |
| collection |
OJS |
| language |
English Ukrainian |
| topic |
грозовые перенапряжения подстанция молниеотвод вольт-секундная характеристика гирлянда изоляторов электрическое поле воздушный промежуток допустимое напряжение корпус трансформатора импульсная электрическая прочность 621.316.93 lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength 621.316.93 |
| spellingShingle |
грозовые перенапряжения подстанция молниеотвод вольт-секундная характеристика гирлянда изоляторов электрическое поле воздушный промежуток допустимое напряжение корпус трансформатора импульсная электрическая прочность 621.316.93 lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength 621.316.93 Nizhevskyi, I. V. Nizhevskyi, V. I. CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| topic_facet |
грозовые перенапряжения подстанция молниеотвод вольт-секундная характеристика гирлянда изоляторов электрическое поле воздушный промежуток допустимое напряжение корпус трансформатора импульсная электрическая прочность 621.316.93 lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength 621.316.93 |
| format |
Article |
| author |
Nizhevskyi, I. V. Nizhevskyi, V. I. |
| author_facet |
Nizhevskyi, I. V. Nizhevskyi, V. I. |
| author_sort |
Nizhevskyi, I. V. |
| title |
CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| title_short |
CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| title_full |
CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| title_fullStr |
CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| title_full_unstemmed |
CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER |
| title_sort |
calculation estimation of overvoltage on insulation of the equipment of a substation at the lightning strike in its lightning arrester |
| title_alt |
РАСЧЕТНАЯ ОЦЕНКА ПЕРЕНАПРЯЖЕНИЙ НА ИЗОЛЯЦИИ ОБОРУДОВАНИЯ ПОДСТАНЦИИ ПРИ УДАРЕ МОЛНИИ В ЕЕ МОЛНИЕОТВОД |
| description |
Purpose. The complex approach to calculating thunderstorm overvoltage on substation equipment is considered when lightning strikes in a lightning rod. Methodology. The conditions of safe passage of lightning current through a lightning arrester are formulated. Results. It is shown that the calculation of the permissible length of air insulating gaps in the substation is based on the breakdown of the air tension, which is assumed to be 500 kV/m. This leads to an error in calculating the length of the air gap and, as a consequence, the probability of its breakdown, the value of which is used to calculate the indicator of the lightning resistance of the substation. A technique is proposed for calculating the permissible voltage on the transformer case when a lightning strike strikes the lightning receptacle of the transformer portal. On the basis of the nonlinear pulsed electric strength of the ground, the specified minimum permissible ground distance between the grounding rod of the lightning rod and the nearest point of the protected device is obtained. Originality. Refined calculation of the length of the minimum breakdown gap in the air and in the ground. Practical value. The proposed approach makes it possible to calculate thunderstorm overvoltage on substation equipment. |
| publisher |
National Technical University "Kharkiv Polytechnic Institute" and State Institution “Institute of Technical Problems of Magnetism of the National Academy of Sciences of Ukraine” |
| publishDate |
2019 |
| url |
http://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11 |
| work_keys_str_mv |
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