Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral

The paper analyses how the characteristics of the medium-voltage network with insulated neutral and the conditions under which the single line-to-ground fault occurs (insulation condition and value of the fault resistance) influence the zero-sequence components of the voltage of the transformer stat...

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Autores principales:	Dumitru Toader, Maria Vintan, Claudiu Solea, Daniela Vesa, Marian Greconici
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	power distribution systems networks with isolated neutral symmetrical components single line-to-ground faults Technology T
Acceso en línea:	https://doaj.org/article/575f1cea867c45ffaa66323798e8e5a2
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spelling	oai:doaj.org-article:575f1cea867c45ffaa66323798e8e5a22021-11-11T15:50:18ZAnalysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral10.3390/en142170191996-1073https://doaj.org/article/575f1cea867c45ffaa66323798e8e5a22021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7019https://doaj.org/toc/1996-1073The paper analyses how the characteristics of the medium-voltage network with insulated neutral and the conditions under which the single line-to-ground fault occurs (insulation condition and value of the fault resistance) influence the zero-sequence components of the voltage of the transformer station medium-voltage bus bar, the fault current, the currents of the faulted line and the currents of the other non-faulted power lines connected to the transformer station bus bars. Assuming the waveform of the medium voltage bus voltages in the transformer station is known, the influence of the fault resistance on the total distortion coefficient of the fault current is analysed. This establishes the conditions under which a single line-to-ground fault can be detected by controlling the total distortion coefficient of the fault current and the currents of the fault-free lines. It also examines the conditions under which a single line-to-ground fault can be selectively detected by checking the effective value and direction of flow of the zero-sequence currents of the medium-voltage lines during the fault. The results obtained by the calculation were verified experimentally in the medium voltage network considered in the study. The acceptable differences, considering the degree of accuracy with which the parameters of a medium voltage network are known, between the results obtained by calculation and those obtained experimentally show that the simplifying assumptions accepted for the mathematical models used in the calculation are correct.Dumitru ToaderMaria VintanClaudiu SoleaDaniela VesaMarian GreconiciMDPI AGarticlepower distribution systemsnetworks with isolated neutralsymmetrical componentssingle line-to-ground faultsTechnologyTENEnergies, Vol 14, Iss 7019, p 7019 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	power distribution systems networks with isolated neutral symmetrical components single line-to-ground faults Technology T
spellingShingle	power distribution systems networks with isolated neutral symmetrical components single line-to-ground faults Technology T Dumitru Toader Maria Vintan Claudiu Solea Daniela Vesa Marian Greconici Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
description	The paper analyses how the characteristics of the medium-voltage network with insulated neutral and the conditions under which the single line-to-ground fault occurs (insulation condition and value of the fault resistance) influence the zero-sequence components of the voltage of the transformer station medium-voltage bus bar, the fault current, the currents of the faulted line and the currents of the other non-faulted power lines connected to the transformer station bus bars. Assuming the waveform of the medium voltage bus voltages in the transformer station is known, the influence of the fault resistance on the total distortion coefficient of the fault current is analysed. This establishes the conditions under which a single line-to-ground fault can be detected by controlling the total distortion coefficient of the fault current and the currents of the fault-free lines. It also examines the conditions under which a single line-to-ground fault can be selectively detected by checking the effective value and direction of flow of the zero-sequence currents of the medium-voltage lines during the fault. The results obtained by the calculation were verified experimentally in the medium voltage network considered in the study. The acceptable differences, considering the degree of accuracy with which the parameters of a medium voltage network are known, between the results obtained by calculation and those obtained experimentally show that the simplifying assumptions accepted for the mathematical models used in the calculation are correct.
format	article
author	Dumitru Toader Maria Vintan Claudiu Solea Daniela Vesa Marian Greconici
author_facet	Dumitru Toader Maria Vintan Claudiu Solea Daniela Vesa Marian Greconici
author_sort	Dumitru Toader
title	Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
title_short	Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
title_full	Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
title_fullStr	Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
title_full_unstemmed	Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral
title_sort	analysis of the possibilities of selective detection of a single line-to-ground fault in a medium voltage network with isolated neutral
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/575f1cea867c45ffaa66323798e8e5a2
work_keys_str_mv	AT dumitrutoader analysisofthepossibilitiesofselectivedetectionofasinglelinetogroundfaultinamediumvoltagenetworkwithisolatedneutral AT mariavintan analysisofthepossibilitiesofselectivedetectionofasinglelinetogroundfaultinamediumvoltagenetworkwithisolatedneutral AT claudiusolea analysisofthepossibilitiesofselectivedetectionofasinglelinetogroundfaultinamediumvoltagenetworkwithisolatedneutral AT danielavesa analysisofthepossibilitiesofselectivedetectionofasinglelinetogroundfaultinamediumvoltagenetworkwithisolatedneutral AT mariangreconici analysisofthepossibilitiesofselectivedetectionofasinglelinetogroundfaultinamediumvoltagenetworkwithisolatedneutral
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Analysis of the Possibilities of Selective Detection of a Single Line-to-Ground Fault in a Medium Voltage Network with Isolated Neutral

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