Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação
Ano de defesa: | 2022 |
---|---|
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/1/25767 |
Resumo: | This work presents the development of an standalone street lighting system based on solar energy and light emitting diodes (LEDs). The system must be able to charge a battery bank during the day from a photovoltaic source and supply an LED load during the night. A bidirectional converter based on gallium nitride (GaN) transistors is used in order to achieve a high-performance system and, thereby, to optimize the size of the battery bank and photovoltaic array to maximize the system autonomy or reduce costs, depending on the application goals. A complete and optimized methodology was developed for the design of the elements of this standalone lighting system. This methodology is based on a discrete search algorithm that evaluates a set of commercially available elements to determine the best combination of components and the best operating point of the circuit, in order to minimize energy losses over the system operation period. This document initially presents a bibliographic review of theoretical aspects related to autonomous lighting systems, such as the photovoltaic source, batteries, LED load, converter topologies and commercially available solutions. A review of GaN switches is also presented, covering their history, operating principles, features and state of the art in terms of commercially available devices. To experimentally validate the proposed topology, a 100 W prototype with arbitrary switching frequencies was developed and evaluated. In battery charger mode, the circuit operates at 250 kHz and has efficiencies greater than 92% over the entire power range with a maximum value of 97.3%. In LED driver mode, the chosen operating frequency was 345 kHz and a maximum efficiency of 95.8% was achieved. To validate the proposed design methodology, four converters with power ratings of 30 W in driver mode and 150 W in charger mode were implemented and tested at different operating points. Thus, it was proved that, considering a set of components, the methodology is able to determine the best operating point to maximize the efficiency, and, considering different sets of components, determining the best in terms of energy loss reduction to maximize system autonomy |
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2022-08-02T19:29:53Z2022-08-02T19:29:53Z2022-02-18http://repositorio.ufsm.br/handle/1/25767This work presents the development of an standalone street lighting system based on solar energy and light emitting diodes (LEDs). The system must be able to charge a battery bank during the day from a photovoltaic source and supply an LED load during the night. A bidirectional converter based on gallium nitride (GaN) transistors is used in order to achieve a high-performance system and, thereby, to optimize the size of the battery bank and photovoltaic array to maximize the system autonomy or reduce costs, depending on the application goals. A complete and optimized methodology was developed for the design of the elements of this standalone lighting system. This methodology is based on a discrete search algorithm that evaluates a set of commercially available elements to determine the best combination of components and the best operating point of the circuit, in order to minimize energy losses over the system operation period. This document initially presents a bibliographic review of theoretical aspects related to autonomous lighting systems, such as the photovoltaic source, batteries, LED load, converter topologies and commercially available solutions. A review of GaN switches is also presented, covering their history, operating principles, features and state of the art in terms of commercially available devices. To experimentally validate the proposed topology, a 100 W prototype with arbitrary switching frequencies was developed and evaluated. In battery charger mode, the circuit operates at 250 kHz and has efficiencies greater than 92% over the entire power range with a maximum value of 97.3%. In LED driver mode, the chosen operating frequency was 345 kHz and a maximum efficiency of 95.8% was achieved. To validate the proposed design methodology, four converters with power ratings of 30 W in driver mode and 150 W in charger mode were implemented and tested at different operating points. Thus, it was proved that, considering a set of components, the methodology is able to determine the best operating point to maximize the efficiency, and, considering different sets of components, determining the best in terms of energy loss reduction to maximize system autonomyO presente trabalho apresenta o desenvolvimento de um sistema autônomo de iluminação pública baseado em energia solar fotovolaica e diodos emissores de luz (LEDs). O sistema deve ser capaz de carregar um banco de baterias durante o dia através de um arranjo fotovoltaico e suprir uma carga LED durante a noite. Um conversor bidirecional com transistores de nitreto de gálio (GaN) é utilizado de forma a obter uma estrutura com elevado rendimento e, com isso, otimizar o tamanho do banco de baterias e arranjo fotovoltaico para maximizar a autonomia do sistema ou reduzir os custos de produção, dependendo dos objetivos da aplicação. Foi desenvolvida uma metodologia completa e otimizada para o projeto dos elementos deste sistema autônomo de iluminação. Esta metodologia baseia-se em um algoritmo de busca discreta que avalia um conjunto de componentes disponíveis comercialmente para determinar a melhor combinação de componentes e o melhor ponto de operação do circuito, de modo a minimizar as perdas de energia ao longo do período de operação do sistema. Neste documento é apresentada, inicialmente, uma revisão bibliográfica de aspectos teóricos relacionados aos sistemas autônomos de iluminação, como fonte fotovoltaica, baterias, carga LED, topologias de conversores e soluções comerciais disponíveis. Uma revisão sobre interruptores GaN também é apresentada, abrangendo seu histórico, princípio de funcionamento, características e estado da arte da tecnologia em termos de dispositivos comerciais. Para validar experimentalmente a topologia proposta, um protótipo de 100 W com frequência de comutação arbitrária foi desenvolvido e avaliado. No modo carregador de bateria, o circuito opera em 250 kHz e apresenta eficiências maiores que 92% em toda a faixa de potência com um valor máximo de 97,3%. No modo driver de LED, a frequência de operação escolhida foi de 345 kHz e uma eficiência máxima de 95,8% foi obtida. Para a validação da metodologia de projeto proposta, quatro conversores com potências de 30 W em modo driver e 150 W em modo carregador foram implementados e testados em diferentes pontos de operação. Com isso, comprovou-se que, considerando um conjunto de componentes, a metodologia é capaz de determinar o melhor ponto de operação para maximizar o rendimento, e, considerando diferentes conjuntos de componentes, determinar o melhor em termos de redução da energia perdida, de forma a maximizar a autonomia do sistema.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/openAccessConversores CC-CCDiodos emissores de luzNitreto de gálioSistemas autônomosSistemas fotovoltaicosDC-DC power convertersGallium nitrideLight emitting diodesPhotovoltaic systemsStandalone systemsCNPQ::ENGENHARIAS::ENGENHARIA ELETRICAProjeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminaçãoOptimized design for minimization of losses in a bidirectional converter applied to standalone lighting systemsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisDalla Costa, Marco Antôniohttp://lattes.cnpq.br/4455422053321491Álvarez, José Marcos AlonsoBellinaso, Lucas VizzottoPinto, Rafael AdaimeBraga, Henrique Antônio CarvalhoSa Junior, Edilson Mineirohttp://lattes.cnpq.br/3864761697400948Duarte, Renan Rodrigo3004000000076006006006006006006006004e82ca7f-4cee-4e8a-9019-64e291cdf7cd03cc4e1b-bf7c-4751-b5a1-06dc6b7ec1a3b466e529-82c9-47bb-a391-cd1a52d3d095745ce750-da4a-4b6b-883d-5fa3a53d288bf2dc5f45-3b73-4a3d-8289-86703e5b4b1bbbcdc066-2e64-4d2d-9abd-4573fc9e87cb442c5693-b971-4d7b-8e57-8755a010dfebreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
dc.title.alternative.eng.fl_str_mv |
Optimized design for minimization of losses in a bidirectional converter applied to standalone lighting systems |
title |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
spellingShingle |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação Duarte, Renan Rodrigo Conversores CC-CC Diodos emissores de luz Nitreto de gálio Sistemas autônomos Sistemas fotovoltaicos DC-DC power converters Gallium nitride Light emitting diodes Photovoltaic systems Standalone systems CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
title_short |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
title_full |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
title_fullStr |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
title_full_unstemmed |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
title_sort |
Projeto otimizado para minimização de perdas em um conversor bidirecional aplicado a sistemas autônomos de iluminação |
author |
Duarte, Renan Rodrigo |
author_facet |
Duarte, Renan Rodrigo |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Dalla Costa, Marco Antônio |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4455422053321491 |
dc.contributor.advisor-co1.fl_str_mv |
Álvarez, José Marcos Alonso |
dc.contributor.referee1.fl_str_mv |
Bellinaso, Lucas Vizzotto |
dc.contributor.referee2.fl_str_mv |
Pinto, Rafael Adaime |
dc.contributor.referee3.fl_str_mv |
Braga, Henrique Antônio Carvalho |
dc.contributor.referee4.fl_str_mv |
Sa Junior, Edilson Mineiro |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3864761697400948 |
dc.contributor.author.fl_str_mv |
Duarte, Renan Rodrigo |
contributor_str_mv |
Dalla Costa, Marco Antônio Álvarez, José Marcos Alonso Bellinaso, Lucas Vizzotto Pinto, Rafael Adaime Braga, Henrique Antônio Carvalho Sa Junior, Edilson Mineiro |
dc.subject.por.fl_str_mv |
Conversores CC-CC Diodos emissores de luz Nitreto de gálio Sistemas autônomos Sistemas fotovoltaicos |
topic |
Conversores CC-CC Diodos emissores de luz Nitreto de gálio Sistemas autônomos Sistemas fotovoltaicos DC-DC power converters Gallium nitride Light emitting diodes Photovoltaic systems Standalone systems CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
dc.subject.eng.fl_str_mv |
DC-DC power converters Gallium nitride Light emitting diodes Photovoltaic systems Standalone systems |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
description |
This work presents the development of an standalone street lighting system based on solar energy and light emitting diodes (LEDs). The system must be able to charge a battery bank during the day from a photovoltaic source and supply an LED load during the night. A bidirectional converter based on gallium nitride (GaN) transistors is used in order to achieve a high-performance system and, thereby, to optimize the size of the battery bank and photovoltaic array to maximize the system autonomy or reduce costs, depending on the application goals. A complete and optimized methodology was developed for the design of the elements of this standalone lighting system. This methodology is based on a discrete search algorithm that evaluates a set of commercially available elements to determine the best combination of components and the best operating point of the circuit, in order to minimize energy losses over the system operation period. This document initially presents a bibliographic review of theoretical aspects related to autonomous lighting systems, such as the photovoltaic source, batteries, LED load, converter topologies and commercially available solutions. A review of GaN switches is also presented, covering their history, operating principles, features and state of the art in terms of commercially available devices. To experimentally validate the proposed topology, a 100 W prototype with arbitrary switching frequencies was developed and evaluated. In battery charger mode, the circuit operates at 250 kHz and has efficiencies greater than 92% over the entire power range with a maximum value of 97.3%. In LED driver mode, the chosen operating frequency was 345 kHz and a maximum efficiency of 95.8% was achieved. To validate the proposed design methodology, four converters with power ratings of 30 W in driver mode and 150 W in charger mode were implemented and tested at different operating points. Thus, it was proved that, considering a set of components, the methodology is able to determine the best operating point to maximize the efficiency, and, considering different sets of components, determining the best in terms of energy loss reduction to maximize system autonomy |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-08-02T19:29:53Z |
dc.date.available.fl_str_mv |
2022-08-02T19:29:53Z |
dc.date.issued.fl_str_mv |
2022-02-18 |
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/1/25767 |
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http://repositorio.ufsm.br/handle/1/25767 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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300400000007 |
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600 600 600 600 600 600 600 600 |
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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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