Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR
Ano de defesa: | 2021 |
---|---|
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/1/23046 |
Resumo: | This Ph.D. thesis presents an analysis on the influence of the synchronism system on three-phase converters connected to weak grid combining state space approaches and matrix transfer functions. The generation system modeling is performed on dq synchronous axes in continuous time divided into two domains, the grid domain and the converter domain. The complete converter model, which includes the current, DC bus voltage, reactive power and PLL controllers, is non-linear, and therefore its linearization is performed by small signal perturbation. The eigenvalues-based method will be used to propose guidelines for choosing the PLL and other controllers gains of a three-phase converter connected to a weak grid. Moreover, based on the impedance method, the generation system is divided into two elements represented in matrix transfer functions. The first represents the equivalent admittance of the converter, which is obtained by considering it connected to an ideal grid. The second represents the equivalent impedance of the grid taking into account the line transmission π model. The interconnection between the two elements is performed in transfer function matrices and represented in block diagram form. The stability analysis of the system is performed by using the generalized Nyquist criterion on the product of the admittance of the converter with the grid impedance. Thus, it can be inferred on the influence of the synchronism system on the stability of converters connected to the grid and to estimate the stability conditions of the system. Finally, the analysis will be extended to multiple converters in parallel. Results in the time domain in HIL show a good correlation with those of the theoretical analysis performed in the frequency domain. |
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2021-11-29T15:13:39Z2021-11-29T15:13:39Z2021-07-22http://repositorio.ufsm.br/handle/1/23046This Ph.D. thesis presents an analysis on the influence of the synchronism system on three-phase converters connected to weak grid combining state space approaches and matrix transfer functions. The generation system modeling is performed on dq synchronous axes in continuous time divided into two domains, the grid domain and the converter domain. The complete converter model, which includes the current, DC bus voltage, reactive power and PLL controllers, is non-linear, and therefore its linearization is performed by small signal perturbation. The eigenvalues-based method will be used to propose guidelines for choosing the PLL and other controllers gains of a three-phase converter connected to a weak grid. Moreover, based on the impedance method, the generation system is divided into two elements represented in matrix transfer functions. The first represents the equivalent admittance of the converter, which is obtained by considering it connected to an ideal grid. The second represents the equivalent impedance of the grid taking into account the line transmission π model. The interconnection between the two elements is performed in transfer function matrices and represented in block diagram form. The stability analysis of the system is performed by using the generalized Nyquist criterion on the product of the admittance of the converter with the grid impedance. Thus, it can be inferred on the influence of the synchronism system on the stability of converters connected to the grid and to estimate the stability conditions of the system. Finally, the analysis will be extended to multiple converters in parallel. Results in the time domain in HIL show a good correlation with those of the theoretical analysis performed in the frequency domain.Esta tese apresenta uma análise sobre a influência do sistema de sincronismo em conversores trifásicos conectados a redes fracas combinado as abordagens de espaço de estado e funções de transferências matriciais. A modelagem do sistema de geração é realizada em eixos síncronos dq no tempo contínuo dividido em dois domínios, o domínio da rede e o do conversor. O modelo do conversor, que inclui os controladores de corrente, tensão do barramento CC, potência reativa e o PLL, é não-linear, e por isso, realiza-se a sua linearização por perturbações de pequenos sinais. Inicialmente, os projetos destes controladores são realizados de forma independente, onde os parâmetros de escolha são a frequência de cruzamento de ganho e o coeficiente de amortecimento. A seguir, o método baseado nos autovalores é utilizado para propor diretrizes de escolha dos ganhos do PLL e dos outros controladores utilizados, agora, considerando a interação entre eles e a conexão do conversor a uma rede fraca. Além disso, fundamentado no método das impedâncias, o sistema de geração é dividido em dois elementos representados em funções de transferência matriciais. O primeiro representa a admitância equivalente do conversor, que é obtida ao considerá-lo conectado à uma rede ideal. O segundo representa a impedância equivalente da rede incluindo o modelo equivalente π da linha de transmissão. A interconexão entre os dois elementos é realizada em matrizes função de transferência e representada na forma de diagrama de blocos. A análise da estabilidade do sistema é realizada através da utilização do método generalizado de Nyquist sobre o produto da admitância do conversor com a impedância da rede. Assim, pode-se inferir sobre a influência do PLL e dos outros controladores na estabilidade de conversores conectados à rede e estimar as margens de estabilidade do sistema. Por fim, esta análise é estendida para múltiplos conversores em paralelo. Resultados no domínio do tempo em HIL mostram boa correlação com os da análise teórica realizada no domínio da frequência.Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPqporUniversidade 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/openAccessEstabilidadeConversor fonte de tensãoRede fracaPLLStabilityVoltage source converterWeak gridCNPQ::ENGENHARIAS::ENGENHARIA ELETRICAAnálise da estabilidade de conversores conectados a redes elétricas com baixo SCRStability analysis of grid-tied convertersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisPinheiro, Humbertohttp://lattes.cnpq.br/5900576762082210Costa, Jean Patric daRibeiro, Ricardo Lúcio de AraujoCarnielutti, Fernanda de MoraisSperandio, Mauriciohttp://lattes.cnpq.br/0649840326082471Nicolini, André Miguel3004000000076006006006006006006008aab6aac-f16b-4f23-8761-b8462475f0275f29fe12-b19e-44c3-9453-b8765f6bcb74323df103-1c1c-45fa-8dd7-52989cafe6b1301ea9f8-c690-410d-b693-b9f99280971cbb6aad3c-8a3b-443b-b477-9e897aadbfa6938221ca-91f4-4c74-918f-d2d05b767f6ereponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGEE_2021_NICOLINI_ANDRÉ.pdfTES_PPGEE_2021_NICOLINI_ANDRÉ.pdfTese de doutoradoapplication/pdf56485912http://repositorio.ufsm.br/bitstream/1/23046/1/TES_PPGEE_2021_NICOLINI_ANDR%c3%89.pdfc37d537de5d7bf34c44738118b22f271MD51LICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
dc.title.alternative.eng.fl_str_mv |
Stability analysis of grid-tied converters |
title |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
spellingShingle |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR Nicolini, André Miguel Estabilidade Conversor fonte de tensão Rede fraca PLL Stability Voltage source converter Weak grid CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
title_short |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
title_full |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
title_fullStr |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
title_full_unstemmed |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
title_sort |
Análise da estabilidade de conversores conectados a redes elétricas com baixo SCR |
author |
Nicolini, André Miguel |
author_facet |
Nicolini, André Miguel |
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 |
Costa, Jean Patric da |
dc.contributor.referee2.fl_str_mv |
Ribeiro, Ricardo Lúcio de Araujo |
dc.contributor.referee3.fl_str_mv |
Carnielutti, Fernanda de Morais |
dc.contributor.referee4.fl_str_mv |
Sperandio, Mauricio |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0649840326082471 |
dc.contributor.author.fl_str_mv |
Nicolini, André Miguel |
contributor_str_mv |
Pinheiro, Humberto Costa, Jean Patric da Ribeiro, Ricardo Lúcio de Araujo Carnielutti, Fernanda de Morais Sperandio, Mauricio |
dc.subject.por.fl_str_mv |
Estabilidade Conversor fonte de tensão Rede fraca PLL |
topic |
Estabilidade Conversor fonte de tensão Rede fraca PLL Stability Voltage source converter Weak grid CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
dc.subject.eng.fl_str_mv |
Stability Voltage source converter Weak grid |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
description |
This Ph.D. thesis presents an analysis on the influence of the synchronism system on three-phase converters connected to weak grid combining state space approaches and matrix transfer functions. The generation system modeling is performed on dq synchronous axes in continuous time divided into two domains, the grid domain and the converter domain. The complete converter model, which includes the current, DC bus voltage, reactive power and PLL controllers, is non-linear, and therefore its linearization is performed by small signal perturbation. The eigenvalues-based method will be used to propose guidelines for choosing the PLL and other controllers gains of a three-phase converter connected to a weak grid. Moreover, based on the impedance method, the generation system is divided into two elements represented in matrix transfer functions. The first represents the equivalent admittance of the converter, which is obtained by considering it connected to an ideal grid. The second represents the equivalent impedance of the grid taking into account the line transmission π model. The interconnection between the two elements is performed in transfer function matrices and represented in block diagram form. The stability analysis of the system is performed by using the generalized Nyquist criterion on the product of the admittance of the converter with the grid impedance. Thus, it can be inferred on the influence of the synchronism system on the stability of converters connected to the grid and to estimate the stability conditions of the system. Finally, the analysis will be extended to multiple converters in parallel. Results in the time domain in HIL show a good correlation with those of the theoretical analysis performed in the frequency domain. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-11-29T15:13:39Z |
dc.date.available.fl_str_mv |
2021-11-29T15:13:39Z |
dc.date.issued.fl_str_mv |
2021-07-22 |
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/1/23046 |
url |
http://repositorio.ufsm.br/handle/1/23046 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300400000007 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 600 600 600 |
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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