Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer

This paper addresses the problems associated with the dc-link capacitor voltages of the three-level neutral-point-clamped power converter: the imbalance of the capacitor voltages as well as the presence of an ac-voltage low-frequency oscillation in the dc link of the converter. In order to cope with...

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Autores: Umbría Jiménez, Francisco, Gordillo Álvarez, Francisco, Gómez‐Estern Aguilar, Fabio, Salas Gómez, Francisco, Portillo Guisado, Ramón Carlos, Vázquez Pérez, Sergio
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/23372
Acceso en línea:http://hdl.handle.net/11441/23372
https://doi.org/10.1016/j.conengprac.2013.12.003
Access Level:acceso abierto
Palabra clave:Multilevel power converter
neutral-point-clamped (NPC) converter
voltage balancing
disturbance rejection
Luenberger observer
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repository_id_str
spelling Voltage balancing in three-level neutral-point-clamped converters via Luenberger observerUmbría Jiménez, FranciscoGordillo Álvarez, FranciscoGómez‐Estern Aguilar, FabioSalas Gómez, FranciscoPortillo Guisado, Ramón CarlosVázquez Pérez, SergioMultilevel power converterneutral-point-clamped (NPC) convertervoltage balancingdisturbance rejectionLuenberger observerThis paper addresses the problems associated with the dc-link capacitor voltages of the three-level neutral-point-clamped power converter: the imbalance of the capacitor voltages as well as the presence of an ac-voltage low-frequency oscillation in the dc link of the converter. In order to cope with them, a mathematical analysis of the capacitor voltage difference dynamics, based on a direct average continuous model, is carried out, considering a singular perturbation approach. The analysis leads to a final expression where a sinusoidal disturbance appears explicitly. Consequently, the two problems can be handled together using the ordinary formulation of a problem of regulating the output of a system subject to sinusoidal disturbances, applying classical control theory to design the controller. In this way, the controller is designed including the disturbance estimate provided by a Luenberger observer to asymptotically cancel the disturbance, while keeping also balanced the capacitor voltages. Experiments for a synchronous three-level neutral-point-clamped converter prototype are carried out to evaluate the performance and usefulness of the converter working as a grid-connected inverter under the proposed control law.MICINN-FEDER DPI2009-09661Junta de Andalucía P07-TIC-02991Ingeniería de Sistemas y AutomáticaIngeniería ElectrónicaMinisterio de Ciencia e Innovación (MICIN). EspañaJunta de Andalucía2014info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/23372https://doi.org/10.1016/j.conengprac.2013.12.003reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)Ingléshttp://dx.doi.org/10.1016/j.conengprac.2013.12.003http://dx.doi.org/10.1016/j.conengprac.2013.12.003info:eu-repo/semantics/openAccessoai:idus.us.es:11441/233722026-06-17T12:51:07Z
dc.title.none.fl_str_mv Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
title Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
spellingShingle Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
Umbría Jiménez, Francisco
Multilevel power converter
neutral-point-clamped (NPC) converter
voltage balancing
disturbance rejection
Luenberger observer
title_short Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
title_full Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
title_fullStr Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
title_full_unstemmed Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
title_sort Voltage balancing in three-level neutral-point-clamped converters via Luenberger observer
dc.creator.none.fl_str_mv Umbría Jiménez, Francisco
Gordillo Álvarez, Francisco
Gómez‐Estern Aguilar, Fabio
Salas Gómez, Francisco
Portillo Guisado, Ramón Carlos
Vázquez Pérez, Sergio
author Umbría Jiménez, Francisco
author_facet Umbría Jiménez, Francisco
Gordillo Álvarez, Francisco
Gómez‐Estern Aguilar, Fabio
Salas Gómez, Francisco
Portillo Guisado, Ramón Carlos
Vázquez Pérez, Sergio
author_role author
author2 Gordillo Álvarez, Francisco
Gómez‐Estern Aguilar, Fabio
Salas Gómez, Francisco
Portillo Guisado, Ramón Carlos
Vázquez Pérez, Sergio
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ingeniería de Sistemas y Automática
Ingeniería Electrónica
Ministerio de Ciencia e Innovación (MICIN). España
Junta de Andalucía
dc.subject.none.fl_str_mv Multilevel power converter
neutral-point-clamped (NPC) converter
voltage balancing
disturbance rejection
Luenberger observer
topic Multilevel power converter
neutral-point-clamped (NPC) converter
voltage balancing
disturbance rejection
Luenberger observer
description This paper addresses the problems associated with the dc-link capacitor voltages of the three-level neutral-point-clamped power converter: the imbalance of the capacitor voltages as well as the presence of an ac-voltage low-frequency oscillation in the dc link of the converter. In order to cope with them, a mathematical analysis of the capacitor voltage difference dynamics, based on a direct average continuous model, is carried out, considering a singular perturbation approach. The analysis leads to a final expression where a sinusoidal disturbance appears explicitly. Consequently, the two problems can be handled together using the ordinary formulation of a problem of regulating the output of a system subject to sinusoidal disturbances, applying classical control theory to design the controller. In this way, the controller is designed including the disturbance estimate provided by a Luenberger observer to asymptotically cancel the disturbance, while keeping also balanced the capacitor voltages. Experiments for a synchronous three-level neutral-point-clamped converter prototype are carried out to evaluate the performance and usefulness of the converter working as a grid-connected inverter under the proposed control law.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/23372
https://doi.org/10.1016/j.conengprac.2013.12.003
url http://hdl.handle.net/11441/23372
https://doi.org/10.1016/j.conengprac.2013.12.003
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.conengprac.2013.12.003
http://dx.doi.org/10.1016/j.conengprac.2013.12.003
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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