Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing

Extra-high voltage (EHV) lines of 500–750 kV, providing transmission of electricity over long distances and at the same time performing the functions of intersystem communication at the level of the national power system, play an important role not only in normal modes, but also in emergency modes,...

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Autores principales:	Karomatullo Makhmudov, Tatyana Krasilnikova, Murodbek Safaraliev, Sergey Kokin, Anvari Ghulomzoda, Stepan Dmitriev
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Extra-high voltage line Transposed line Four-radial shunt reactors Two-phase auto-reclosing Transient recovery voltage Secondary arc current Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/9bf139ca704d4bb682ce2ceee99f3639
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spelling	oai:doaj.org-article:9bf139ca704d4bb682ce2ceee99f36392021-11-26T04:34:12ZAnalysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing2352-484710.1016/j.egyr.2021.08.138https://doaj.org/article/9bf139ca704d4bb682ce2ceee99f36392021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721007411https://doaj.org/toc/2352-4847Extra-high voltage (EHV) lines of 500–750 kV, providing transmission of electricity over long distances and at the same time performing the functions of intersystem communication at the level of the national power system, play an important role not only in normal modes, but also in emergency modes, ensuring the dynamic stability of the power system as a whole. In these lines, the overwhelming proportion of power cuts are caused by single-phase short circuits (90%), a significant part of which, being unstable arc faults, are successfully eliminated in the single-phase auto-reclosing cycle. Also, about 5%–10% of failures can be constituted by two-phase short circuits, which can be eliminated in a two-phase auto-reclosing cycle (TPhAR). The purpose of this paper is to study two-phase auto-reclosing in transposed EHV lines equipped with four-radial shunt reactors (ShR). The paper analyzes the efficiency of using a two-phase auto-reclosing to eliminate two-phase short-circuits in the lines connecting the power systems of Kyrgyzstan and Tajikistan. An algorithm is proposed for calculating the transient recovering voltages (TRV) and secondary arc currents (SAC) in the real transposed line Datka–Khujand–Dushanbe. The obtained results of TRV and SAC, which are within the permissible limits for the Dushanbe–Khujand line section, make it possible to have a dead time of TPhAR of no more than 0.6 s, in order to maintain the dynamic stability of the power system. For lines with a length of about 500 km (Datka–Khujand), equipped with three reactors, a successful TPhAR is impossible due to the appearance of resonant TRV in the circuit. The paper proposes the use of banks of capacitors connected in series in the phases of the ShR for the implementation of a successful TPhAR with the duration of the required pause of about 0.6 s.Karomatullo MakhmudovTatyana KrasilnikovaMurodbek SafaralievSergey KokinAnvari GhulomzodaStepan DmitrievElsevierarticleExtra-high voltage lineTransposed lineFour-radial shunt reactorsTwo-phase auto-reclosingTransient recovery voltageSecondary arc currentElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 56-64 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Extra-high voltage line Transposed line Four-radial shunt reactors Two-phase auto-reclosing Transient recovery voltage Secondary arc current Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Extra-high voltage line Transposed line Four-radial shunt reactors Two-phase auto-reclosing Transient recovery voltage Secondary arc current Electrical engineering. Electronics. Nuclear engineering TK1-9971 Karomatullo Makhmudov Tatyana Krasilnikova Murodbek Safaraliev Sergey Kokin Anvari Ghulomzoda Stepan Dmitriev Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
description	Extra-high voltage (EHV) lines of 500–750 kV, providing transmission of electricity over long distances and at the same time performing the functions of intersystem communication at the level of the national power system, play an important role not only in normal modes, but also in emergency modes, ensuring the dynamic stability of the power system as a whole. In these lines, the overwhelming proportion of power cuts are caused by single-phase short circuits (90%), a significant part of which, being unstable arc faults, are successfully eliminated in the single-phase auto-reclosing cycle. Also, about 5%–10% of failures can be constituted by two-phase short circuits, which can be eliminated in a two-phase auto-reclosing cycle (TPhAR). The purpose of this paper is to study two-phase auto-reclosing in transposed EHV lines equipped with four-radial shunt reactors (ShR). The paper analyzes the efficiency of using a two-phase auto-reclosing to eliminate two-phase short-circuits in the lines connecting the power systems of Kyrgyzstan and Tajikistan. An algorithm is proposed for calculating the transient recovering voltages (TRV) and secondary arc currents (SAC) in the real transposed line Datka–Khujand–Dushanbe. The obtained results of TRV and SAC, which are within the permissible limits for the Dushanbe–Khujand line section, make it possible to have a dead time of TPhAR of no more than 0.6 s, in order to maintain the dynamic stability of the power system. For lines with a length of about 500 km (Datka–Khujand), equipped with three reactors, a successful TPhAR is impossible due to the appearance of resonant TRV in the circuit. The paper proposes the use of banks of capacitors connected in series in the phases of the ShR for the implementation of a successful TPhAR with the duration of the required pause of about 0.6 s.
format	article
author	Karomatullo Makhmudov Tatyana Krasilnikova Murodbek Safaraliev Sergey Kokin Anvari Ghulomzoda Stepan Dmitriev
author_facet	Karomatullo Makhmudov Tatyana Krasilnikova Murodbek Safaraliev Sergey Kokin Anvari Ghulomzoda Stepan Dmitriev
author_sort	Karomatullo Makhmudov
title	Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
title_short	Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
title_full	Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
title_fullStr	Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
title_full_unstemmed	Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
title_sort	analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9bf139ca704d4bb682ce2ceee99f3639
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Analysis of transient recovery voltage and secondary arc current in transposed extra-high voltage lines in a two-phase auto-reclosing

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