A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section

Conventional dc bias suppression strategies mainly rely on a single type of device, such as blocking capacitor or blocking resistance. However, these methods are passive palliatives and cannot restrain dc bias currents from the sources. In the light of this, a system-level suppression method for dc...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shumin Ma, Xiangning Lin, Zhengtian Li, Neng Jin, Zirui Rong, Peifu Zhang, Haibo Xu
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Dc bias system-level suppression method reverse unbalanced currents Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/81b5679ce61f4811b886acd55d2370e9
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:81b5679ce61f4811b886acd55d2370e9
record_format	dspace
spelling	oai:doaj.org-article:81b5679ce61f4811b886acd55d2370e92021-11-19T00:06:55ZA System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section2169-353610.1109/ACCESS.2021.3108555https://doaj.org/article/81b5679ce61f4811b886acd55d2370e92021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9524637/https://doaj.org/toc/2169-3536Conventional dc bias suppression strategies mainly rely on a single type of device, such as blocking capacitor or blocking resistance. However, these methods are passive palliatives and cannot restrain dc bias currents from the sources. In the light of this, a system-level suppression method for dc bias is proposed in this paper. The average value of currents flowing through the earth is offset by actively generating unbalanced current through other dc projects in the same transmission section, which will reduce the currents flowing into the neutral transformers and alleviate the negative impacts of dc bias. First, the feasibility of the same section dc continuous power support is analyzed. Then the dc bias suppression strategy based on reverse unbalanced currents is elaborated. By scanning all the theoretical operable solutions of unbalanced current generation modes and the possible switching combinations of blocking capacitors, the optimal dc bias suppression solution is output considering the number of adjusted dc projects, the overload margin of dc projects and neutral dc currents of transformers. The effectiveness and superiority of the proposed method are verified by comparative case studies of the East China power grid.Shumin MaXiangning LinZhengtian LiNeng JinZirui RongPeifu ZhangHaibo XuIEEEarticleDc biassystem-level suppression methodreverse unbalanced currentsElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 126967-126975 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dc bias system-level suppression method reverse unbalanced currents Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dc bias system-level suppression method reverse unbalanced currents Electrical engineering. Electronics. Nuclear engineering TK1-9971 Shumin Ma Xiangning Lin Zhengtian Li Neng Jin Zirui Rong Peifu Zhang Haibo Xu A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
description	Conventional dc bias suppression strategies mainly rely on a single type of device, such as blocking capacitor or blocking resistance. However, these methods are passive palliatives and cannot restrain dc bias currents from the sources. In the light of this, a system-level suppression method for dc bias is proposed in this paper. The average value of currents flowing through the earth is offset by actively generating unbalanced current through other dc projects in the same transmission section, which will reduce the currents flowing into the neutral transformers and alleviate the negative impacts of dc bias. First, the feasibility of the same section dc continuous power support is analyzed. Then the dc bias suppression strategy based on reverse unbalanced currents is elaborated. By scanning all the theoretical operable solutions of unbalanced current generation modes and the possible switching combinations of blocking capacitors, the optimal dc bias suppression solution is output considering the number of adjusted dc projects, the overload margin of dc projects and neutral dc currents of transformers. The effectiveness and superiority of the proposed method are verified by comparative case studies of the East China power grid.
format	article
author	Shumin Ma Xiangning Lin Zhengtian Li Neng Jin Zirui Rong Peifu Zhang Haibo Xu
author_facet	Shumin Ma Xiangning Lin Zhengtian Li Neng Jin Zirui Rong Peifu Zhang Haibo Xu
author_sort	Shumin Ma
title	A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
title_short	A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
title_full	A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
title_fullStr	A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
title_full_unstemmed	A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section
title_sort	system-level suppression method for dc bias based on reverse unbalanced currents in the same transmission section
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/81b5679ce61f4811b886acd55d2370e9
work_keys_str_mv	AT shuminma asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT xiangninglin asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT zhengtianli asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT nengjin asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT ziruirong asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT peifuzhang asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT haiboxu asystemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT shuminma systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT xiangninglin systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT zhengtianli systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT nengjin systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT ziruirong systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT peifuzhang systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection AT haiboxu systemlevelsuppressionmethodfordcbiasbasedonreverseunbalancedcurrentsinthesametransmissionsection
_version_	1718420620430016512

A System-Level Suppression Method for DC Bias Based on Reverse Unbalanced Currents in the Same Transmission Section

Ejemplares similares