Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications

Cascaded converters also known as modular converters are used for STATCOM applications due to their small footprint, capability to achieve high voltage levels, modularity and reduced losses. A commonly used modular converter consists of a series connection of full - bridge also known as H - bridge c...

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Detalles Bibliográficos
Autor: Narula, Anant
Tipo de recurso: tesis de maestría
Fecha de publicación:2018
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/125905
Acceso en línea:https://hdl.handle.net/2117/125905
Access Level:acceso abierto
Palabra clave:Electric current converters
Convertidors de corrent elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
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spelling Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applicationsNarula, AnantElectric current convertersConvertidors de corrent elèctricÀrees temàtiques de la UPC::Enginyeria elèctricaCascaded converters also known as modular converters are used for STATCOM applications due to their small footprint, capability to achieve high voltage levels, modularity and reduced losses. A commonly used modular converter consists of a series connection of full - bridge also known as H - bridge cells or submodules. There is a wide area of resea rch that focuses in various topologies of these submodules. In this project a new multilevel submodule has been proposed. This project investigates operational princip les and capacitive energy balancing of this multilevel submodule that can be used in any type of modular multilevel converter. The investigation consists of analysis of the submodule circuit and its switching states, design and simulation of the modulation strategy as well as the capacitive energy balancing algorithm in the case when multiple submodules are connected in series forming a cascaded converter. Various methods of capacitive energy balancing that employ different ways of sorting capacitor voltage s and deciding which capacitors/submodules should be inserted in the current path are investigated in this thesis. These energy balancing methods have been simulated and evaluated in terms of their impact on the capacitor voltage ripple and switching frequ ency of the new multilevel submodule. This evaluation results in the selection of the most promising energy balancing method, which is embedded in a simulation model of a three - phase STATCOM constructed with the proposed multilevel cells. Finally, the simu lation model is used for evaluating the performance of the proposed multilevel cell and capacitive energy balancing method under steady - state and fault conditions, which would typically occur in a utility application.Universitat Politècnica de CatalunyaGomis Bellmunt, Oriol20182018-09-1720182018-12-18master thesishttp://purl.org/coar/resource_type/c_bdccNAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/2117/125905reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1259052026-05-27T15:37:01Z
dc.title.none.fl_str_mv Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
title Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
spellingShingle Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
Narula, Anant
Electric current converters
Convertidors de corrent elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
title_short Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
title_full Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
title_fullStr Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
title_full_unstemmed Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
title_sort Capacitive energy balancing of multilevel submodules for cascaded converter in STATCOM applications
dc.creator.none.fl_str_mv Narula, Anant
author Narula, Anant
author_facet Narula, Anant
author_role author
dc.contributor.none.fl_str_mv Gomis Bellmunt, Oriol
dc.subject.none.fl_str_mv Electric current converters
Convertidors de corrent elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
topic Electric current converters
Convertidors de corrent elèctric
Àrees temàtiques de la UPC::Enginyeria elèctrica
description Cascaded converters also known as modular converters are used for STATCOM applications due to their small footprint, capability to achieve high voltage levels, modularity and reduced losses. A commonly used modular converter consists of a series connection of full - bridge also known as H - bridge cells or submodules. There is a wide area of resea rch that focuses in various topologies of these submodules. In this project a new multilevel submodule has been proposed. This project investigates operational princip les and capacitive energy balancing of this multilevel submodule that can be used in any type of modular multilevel converter. The investigation consists of analysis of the submodule circuit and its switching states, design and simulation of the modulation strategy as well as the capacitive energy balancing algorithm in the case when multiple submodules are connected in series forming a cascaded converter. Various methods of capacitive energy balancing that employ different ways of sorting capacitor voltage s and deciding which capacitors/submodules should be inserted in the current path are investigated in this thesis. These energy balancing methods have been simulated and evaluated in terms of their impact on the capacitor voltage ripple and switching frequ ency of the new multilevel submodule. This evaluation results in the selection of the most promising energy balancing method, which is embedded in a simulation model of a three - phase STATCOM constructed with the proposed multilevel cells. Finally, the simu lation model is used for evaluating the performance of the proposed multilevel cell and capacitive energy balancing method under steady - state and fault conditions, which would typically occur in a utility application.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-09-17
2018
2018-12-18
dc.type.none.fl_str_mv master thesis
http://purl.org/coar/resource_type/c_bdcc
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/125905
url https://hdl.handle.net/2117/125905
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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