Danger of re-ingition of an electric arc in a resonant earthing medium voltage system

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Danger of re-ingition of an electric arc in a resonant earthing medium voltage system

Popis výsledku v původním jazyce

There are medium voltage networks which have a small extent from the point of capacity current (around 20 Amps). These systems can be operated as isolated neutral systems, resistor earthing systems or resonance earthing systems in numerous other modifications for such an extent of capacity current. The option which is currently enforced is one based on the resonance earthing system. The aim of this paper is to point out the danger of an arc earthing fault which can arise in resonance earthing medium voltage systems, particularly for the concrete specific extent of a medium voltage system and the corresponding capacity current in the areas of (5-20) Amps. For this specific system extent and earthing method there can be multiple re-ignitions during a fault current half-period and this makes it impossible to detect such a fault using (conventional) digital relay protection which works on the principle of fault current individual parts evaluation. This can only occur in the case that a fault arises.

Název v anglickém jazyce

Danger of re-ingition of an electric arc in a resonant earthing medium voltage system

Popis výsledku anglicky

There are medium voltage networks which have a small extent from the point of capacity current (around 20 Amps). These systems can be operated as isolated neutral systems, resistor earthing systems or resonance earthing systems in numerous other modifications for such an extent of capacity current. The option which is currently enforced is one based on the resonance earthing system. The aim of this paper is to point out the danger of an arc earthing fault which can arise in resonance earthing medium voltage systems, particularly for the concrete specific extent of a medium voltage system and the corresponding capacity current in the areas of (5-20) Amps. For this specific system extent and earthing method there can be multiple re-ignitions during a fault current half-period and this makes it impossible to detect such a fault using (conventional) digital relay protection which works on the principle of fault current individual parts evaluation. This can only occur in the case that a fault arises.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 9th International Scientific Symposium on Electrical Power Engineering, ELEKTROENERGETIKA 2017

ISBN

978-80-553-3195-9

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

7

Strana od-do

428-434

Název nakladatele

Technical University of Košice

Místo vydání

Košice

Místo konání akce

Stará Lesná

Datum konání akce

12. 9. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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