Estratégias de modulação para conversores multiníveis com capacitores flutuantes
Ano de defesa: | 2019 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , , , |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
Centro de Tecnologia |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Elétrica
|
Departamento: |
Engenharia Elétrica
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/22442 |
Resumo: | This Thesis contributes to the modulation of the multi-level three-phase converter with flying capacitors, for which simulations were performed to validate three different modulation algorithms. The first one is a phase shift modulation. In order to regulate the voltage of the flying capacitors, a proportional control loop was used that displaces the modulating one, causing the charging or discharging time in a given capacitor to be altered, thus making it possible to control the voltages in the flying capacitors. The second modulation technique was based on a discontinuous modulation. Through discontinuous modulators that vary between regions of PWM and saturation. It is proposed the alternation between the modulating signals that allows the average current in the flying capacitors to remain around zero without increasing the number of commutions. In addition, a proportional controller was implemented to regulate the voltages of the flying capacitors. The main advantage of this technique when compared to phase shift modulation is the reduce THD of line-to-line voltages. Then, a space vector modulation for FCC is proposed. In this modulation, diagrams were created to help definition of the switching sequences for the sectors of the vector space. For each sector, seven sequences were created, in which the first sequence is chosen among the vectors ina a way that at the end of the sequence none of the flying capacitors charged or discharged, plus two more sequences for each flying capacitor. These two sequences serve to regulate the voltage in each flying capacitor, one of them charging and the other discharging the flying capacitor, thus it is possible to maintain the regulated voltages. A fare comparison was then made between the modulation techniques. Initially, it was in order to take care to ensure equality between modulations, such as using the same simulation parameters and the same number of commutations per sampling period. Thus, the performance of the modulations by THD and the first order distortion factor for the modulations addressed in this work were analyzed. |
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2021-10-18T18:02:28Z2021-10-18T18:02:28Z2019-01-30http://repositorio.ufsm.br/handle/1/22442This Thesis contributes to the modulation of the multi-level three-phase converter with flying capacitors, for which simulations were performed to validate three different modulation algorithms. The first one is a phase shift modulation. In order to regulate the voltage of the flying capacitors, a proportional control loop was used that displaces the modulating one, causing the charging or discharging time in a given capacitor to be altered, thus making it possible to control the voltages in the flying capacitors. The second modulation technique was based on a discontinuous modulation. Through discontinuous modulators that vary between regions of PWM and saturation. It is proposed the alternation between the modulating signals that allows the average current in the flying capacitors to remain around zero without increasing the number of commutions. In addition, a proportional controller was implemented to regulate the voltages of the flying capacitors. The main advantage of this technique when compared to phase shift modulation is the reduce THD of line-to-line voltages. Then, a space vector modulation for FCC is proposed. In this modulation, diagrams were created to help definition of the switching sequences for the sectors of the vector space. For each sector, seven sequences were created, in which the first sequence is chosen among the vectors ina a way that at the end of the sequence none of the flying capacitors charged or discharged, plus two more sequences for each flying capacitor. These two sequences serve to regulate the voltage in each flying capacitor, one of them charging and the other discharging the flying capacitor, thus it is possible to maintain the regulated voltages. A fare comparison was then made between the modulation techniques. Initially, it was in order to take care to ensure equality between modulations, such as using the same simulation parameters and the same number of commutations per sampling period. Thus, the performance of the modulations by THD and the first order distortion factor for the modulations addressed in this work were analyzed.Esta Tese de doutorado contribui para a modulação do conversor trifásico multinivel com capacitores flutuantes, para isso foram realizadas simulações para validar três algoritmos de modulação distintos. A primeira é uma modulação por deslocamento de fase. Para fazer a regulação de tensão dos capacitores flutuantes foi utilizada uma malha de controle proporcional que desloca a modulante fazendo com que o tempo de carga ou descarga num determinado capacitor seja alterado, desta forma, possibilitando controlar as tensões nos capacitores flutuantes. A segunda técnica de modulação foi baseada em uma modulação descontinua. Através de modulantes descontínuas que variam entre regiões de PWM e saturação. A alternância entre as modulantes propicia que a corrente média nos capacitores flutuantes se mantenha em torno de zero sem aumentar o número de comutações. Além disso, um controlador proporcional foi implementado para regular as tensões nos capacitores flutuantes. A principal vantagem desta técnica quando comparada com a modulação por deslocamento de fase é a redução da THD das tensões de linha. Em seguida, uma modulação baseada em space vector foi implementada. Nesta modulação foram criados diagramas para auxiliar a definição de sequências de chaveamento para os setores do espaço vetorial. Para cada setor foram criadas sete sequências, onde a primeira sequência é escolhida entre os vetores de forma que no final da sequência nenhum dos capacitores flutuantes carregou nem descarregou, mais duas sequências para cada capacitor flutuante. Estas duas sequências servem para regular a tensão em cada capacitor flutuante, uma delas carrega e a outra descarrega o capacitor flutuante, dessa forma é possível manter a tensões reguladas. Foi, então, realizada uma comparação entre as técnicas de modulação; inicialmente, foi tomado o cuidado para garantir a igualdade entre as modulações, como, por exemplo: usados os mesmos parâmetros de simulação e a mesma quantidade de comutações por período de amostragem. Assim, foram analisadas a eficiência das modulações pela THD e pelo fator de distorção de primeira ordem para as modulações abordadas neste trabalho.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia ElétricaUFSMBrasilEngenharia ElétricaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessCapacitor flutuanteConversor multinívelModulação vetorialMultilevel converterFlying capacitorSpace vector modulationCNPQ::ENGENHARIAS::ENGENHARIA ELETRICAEstratégias de modulação para conversores multiníveis com capacitores flutuantesModulation strategies in flying capacitor multilevel convertersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisPinheiro, Humbertohttp://lattes.cnpq.br/5900576762082210Carnielutti, Fernanda de MoraesGrigoletto, Felipe BovoliniBernardes, Thiago AraujoCamargo, Robinson Figueiredo dehttp://lattes.cnpq.br/7213157101343480Silva, Maurício Mendes da3004000000076006006006006006008aab6aac-f16b-4f23-8761-b8462475f027e8300f6a-5dae-44b1-a091-a9c78e2629cf44f70ae8-2542-4e0f-ba2f-8b1ff7593cd0e2fecd27-811e-4c76-85e6-af5c64d5b9c5ea8fda45-4175-449c-8d21-03e53f614786c0715e17-969f-44ba-b928-61e4f8daaa40reponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGEE_2019_SILVA_MAURICIO.pdfTES_PPGEE_2019_SILVA_MAURICIO.pdfTese de Doutoradoapplication/pdf4234809http://repositorio.ufsm.br/bitstream/1/22442/1/TES_PPGEE_2019_SILVA_MAURICIO.pdf6beaa7311f326b6d3aeada626d58f80bMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
dc.title.alternative.eng.fl_str_mv |
Modulation strategies in flying capacitor multilevel converters |
title |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
spellingShingle |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes Silva, Maurício Mendes da Capacitor flutuante Conversor multinível Modulação vetorial Multilevel converter Flying capacitor Space vector modulation CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
title_short |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
title_full |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
title_fullStr |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
title_full_unstemmed |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
title_sort |
Estratégias de modulação para conversores multiníveis com capacitores flutuantes |
author |
Silva, Maurício Mendes da |
author_facet |
Silva, Maurício Mendes da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Pinheiro, Humberto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5900576762082210 |
dc.contributor.referee1.fl_str_mv |
Carnielutti, Fernanda de Moraes |
dc.contributor.referee2.fl_str_mv |
Grigoletto, Felipe Bovolini |
dc.contributor.referee3.fl_str_mv |
Bernardes, Thiago Araujo |
dc.contributor.referee4.fl_str_mv |
Camargo, Robinson Figueiredo de |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7213157101343480 |
dc.contributor.author.fl_str_mv |
Silva, Maurício Mendes da |
contributor_str_mv |
Pinheiro, Humberto Carnielutti, Fernanda de Moraes Grigoletto, Felipe Bovolini Bernardes, Thiago Araujo Camargo, Robinson Figueiredo de |
dc.subject.por.fl_str_mv |
Capacitor flutuante Conversor multinível Modulação vetorial |
topic |
Capacitor flutuante Conversor multinível Modulação vetorial Multilevel converter Flying capacitor Space vector modulation CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
dc.subject.eng.fl_str_mv |
Multilevel converter Flying capacitor Space vector modulation |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
description |
This Thesis contributes to the modulation of the multi-level three-phase converter with flying capacitors, for which simulations were performed to validate three different modulation algorithms. The first one is a phase shift modulation. In order to regulate the voltage of the flying capacitors, a proportional control loop was used that displaces the modulating one, causing the charging or discharging time in a given capacitor to be altered, thus making it possible to control the voltages in the flying capacitors. The second modulation technique was based on a discontinuous modulation. Through discontinuous modulators that vary between regions of PWM and saturation. It is proposed the alternation between the modulating signals that allows the average current in the flying capacitors to remain around zero without increasing the number of commutions. In addition, a proportional controller was implemented to regulate the voltages of the flying capacitors. The main advantage of this technique when compared to phase shift modulation is the reduce THD of line-to-line voltages. Then, a space vector modulation for FCC is proposed. In this modulation, diagrams were created to help definition of the switching sequences for the sectors of the vector space. For each sector, seven sequences were created, in which the first sequence is chosen among the vectors ina a way that at the end of the sequence none of the flying capacitors charged or discharged, plus two more sequences for each flying capacitor. These two sequences serve to regulate the voltage in each flying capacitor, one of them charging and the other discharging the flying capacitor, thus it is possible to maintain the regulated voltages. A fare comparison was then made between the modulation techniques. Initially, it was in order to take care to ensure equality between modulations, such as using the same simulation parameters and the same number of commutations per sampling period. Thus, the performance of the modulations by THD and the first order distortion factor for the modulations addressed in this work were analyzed. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-01-30 |
dc.date.accessioned.fl_str_mv |
2021-10-18T18:02:28Z |
dc.date.available.fl_str_mv |
2021-10-18T18:02:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/22442 |
url |
http://repositorio.ufsm.br/handle/1/22442 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300400000007 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 600 600 |
dc.relation.authority.fl_str_mv |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Elétrica |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Elétrica |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.source.none.fl_str_mv |
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