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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Autores principales:	I. V. Nizhevskyi, V. I. Nizhevskyi
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Technical University "Kharkiv Polytechnic Institute" 2019
Materias:	lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/2fc654551b054f66a74dab98e830499a
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spelling	oai:doaj.org-article:2fc654551b054f66a74dab98e830499a2021-12-02T16:19:40ZCALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER10.20998/2074-272X.2019.3.112074-272X2309-3404https://doaj.org/article/2fc654551b054f66a74dab98e830499a2019-06-01T00:00:00Zhttp://eie.khpi.edu.ua/article/view/2074-272X.2019.3.11/171145https://doaj.org/toc/2074-272Xhttps://doaj.org/toc/2309-3404Purpose. 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.I. V. NizhevskyiV. I. NizhevskyiNational Technical University "Kharkiv Polytechnic Institute"articlelightning overvoltagesubstationlightning arrestervolt-second characteristicinsulator stringelectric fieldair gappermissible voltagetransformer casepulsed electric strengthElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENRUUKElectrical engineering & Electromechanics, Iss 3, Pp 67-73 (2019)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	lightning overvoltage substation lightning arrester volt-second characteristic insulator string electric field air gap permissible voltage transformer case pulsed electric strength Electrical engineering. Electronics. Nuclear engineering TK1-9971 I. V. Nizhevskyi V. I. Nizhevskyi CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER
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.
format	article
author	I. V. Nizhevskyi V. I. Nizhevskyi
author_facet	I. V. Nizhevskyi V. I. Nizhevskyi
author_sort	I. V. Nizhevskyi
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
publisher	National Technical University "Kharkiv Polytechnic Institute"
publishDate	2019
url	https://doaj.org/article/2fc654551b054f66a74dab98e830499a
work_keys_str_mv	AT ivnizhevskyi calculationestimationofovervoltageoninsulationoftheequipmentofasubstationatthelightningstrikeinitslightningarrester AT vinizhevskyi calculationestimationofovervoltageoninsulationoftheequipmentofasubstationatthelightningstrikeinitslightningarrester
_version_	1718384161465565184

CALCULATION ESTIMATION OF OVERVOLTAGE ON INSULATION OF THE EQUIPMENT OF A SUBSTATION AT THE LIGHTNING STRIKE IN ITS LIGHTNING ARRESTER

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