Proposal of a Photovoltaic AC-Module With a Single-Stage Transformerless Grid-Connected Boost Microinverter

Melo, Fernando Cardoso; Garcia, Lucas S.; Coelho, E.A.A.; Farias, V.J.; Freitas, Luiz Carlos Gomes de

doi:10.1109/tie.2017.2750611

Cited by 44 publications

(36 citation statements)

References 19 publications

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“…B. Análise de Pequenos Sinais Considerando o MCC, o foco dos equacionamentos matemáticos a seguir concentra-se na modelagem de pequenas variações de corrente alternada em torno do valor médio da grandeza em questão [20], propiciando a obtenção das funções de transferência que sintetizam este comportamento. Para tanto, é feita a aplicação do teorema de Laplace em (8) para produzir (9).…”

Section: A Análise De Regime Permanenteunclassified

“…Diferentemente de um PI tradicional, o controlador PR é sintonizado em torno de uma frequência central (neste caso, a própria frequência da rede), para a qual apresenta ganho tendendo ao infinito. Dentre suas características, vale mencionar uma menor susceptibilidade às variações de impedância durante a conexão com a rede e sua função de transferência equivale à transformada de Laplace de uma onda senoidal genérica [20].…”

Section: B Projeto Do Controlador Proporcional-ressonante (Pr)unclassified

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Modelagem e Desenvolvimento de um Inversor CSI Multistring Fotovoltaico de Estágio Único sem Transformador Conectado à Rede Elétrica

Lima¹,

Melo²,

Freitas³

et al. 2020

Eletrônica de Potência

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Resumo -Este artigo traz o projeto e desenvolvimento de um inversor fonte de corrente (do inglês, CSI) fotovoltaico multistring de estágio único sem transformador, destinado exclusivamente a operar em conexão com a rede elétrica. Em virtude do comportamento como CSI, dentro das contribuições do presente trabalho tem-se a ampliação da literatura deste tipo de topologia a partir da implementação de técnicas de controle e operação de potência usuais em outras estruturas topológicas. Além disso, o sistema proposto foi simulado no PSIM ® e os resultados computacionais e experimentais obtidos evidenciaram um comportamento satisfatório da estrutura em prol da injeção de corrente na rede elétrica com baixa distorção harmônica e elevado fator de potência, atendendo normas nacionais e internacionais. Palavras-Chave -Conexão com a rede elétrica, CSI, Estágio único, Fotovoltaico, Inversor sem transformador.Abstract -This paper brings the design and development of a transformerless single-stage multistring photovoltaic current-source inverter (CSI), aiming exclusively the grid-tied operation. Due to the behavior as CSI, within the contributions of the present work there is the expansion of the literature of this type of topology through the implementation of control techniques and power operation usual in other topological structures. In addition, the proposed system was simulated in PSIM® and the computational and experimental results obtained showed a satisfactory behavior of the structure in favor of the injection of current in the grid with low harmonic distortion and high power factor, meeting national and international standards. 

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Section: A Análise De Regime Permanenteunclassified

Section: B Projeto Do Controlador Proporcional-ressonante (Pr)unclassified

Modelagem e Desenvolvimento de um Inversor CSI Multistring Fotovoltaico de Estágio Único sem Transformador Conectado à Rede Elétrica

Lima¹,

Melo²,

Freitas³

et al. 2020

Eletrônica de Potência

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“…The BIPV modules are connected in series, and the string is connected to one inverter. Micro-inverters, where each PV panel has its own low power inverter, are another possibility to connect the panels directly to the AC grid [73][74][75].…”

Section: Evaluation Of the Electrical Installations For Bipvmentioning

confidence: 99%

Review on Building-Integrated Photovoltaics Electrical System Requirements and Module-Integrated Converter Recommendations

et al. 2019

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Since building-integrated photovoltaic (BIPV) modules are typically installed during, not after, the construction phase, BIPVs have a profound impact compared to conventional building-applied photovoltaics on the electrical installation and construction planning of a building. As the cost of BIPV modules decreases over time, the impact of electrical system architecture and converters will become more prevalent in the overall cost of the system. This manuscript provides an overview of potential BIPV electrical architectures. System-level criteria for BIPV installations are established, thus providing a reference framework to compare electrical architectures. To achieve modularity and to minimize engineering costs, module-level DC/DC converters preinstalled in the BIPV module turned out to be the best solution. The second part of this paper establishes converter-level requirements, derived and related to the BIPV system. These include measures to increase the converter fault tolerance for extended availability and to ensure essential safety features.

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“…Thus, in this part, the integrated dc-link inverters are discussed. The integrated dc-link inverter can be separated into two inverters that share the same input and the same output [66,67]. The outputs of these two inverters have the same amplitudes but are in anti-phase.…”

Section: Integrated Dc-link Voltagementioning

confidence: 99%

A Review on Transformerless Step-Up Single-Phase Inverters with Different DC-Link Voltage for Photovoltaic Applications

et al. 2019

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Photovoltaic (PV) energy has been competitive in power generation as an alternative to fossil energy resources over the past decades. The installation of grid-connected solar energy systems is expected to increase rapidly with the fast development of the power electronics technology. As the key to the interface of the PV energy and the grid, power converters should be reliable, efficient and comply with the grid requirements. Considering the nature of PV energy, the power conversion should be flexible (e.g., high step-up DC-DC conversion and harmonic-free DC-AC conversion). Accordingly, many power electronic converters have been reported in literature. Compared with isolated inverters, transformerless inverters show great advantages. This paper thus presents an overview of the transformerless step-up single-phase inverters for PV applications based on the dc-link configurations. Grid-connected PV inverters are classified as constant dc-link voltage structures, pseudo-dc-link voltage structures, pulsating dc-link voltage structures and integrated dc-link voltage structures. The discussion on the composition of different dc-link structures is presented, which provides guidance to select appropriate transformerless inverter topologies for PV applications.

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Proposal of a Photovoltaic AC-Module With a Single-Stage Transformerless Grid-Connected Boost Microinverter

Cited by 44 publications

References 19 publications

Modelagem e Desenvolvimento de um Inversor CSI Multistring Fotovoltaico de Estágio Único sem Transformador Conectado à Rede Elétrica

Modelagem e Desenvolvimento de um Inversor CSI Multistring Fotovoltaico de Estágio Único sem Transformador Conectado à Rede Elétrica

Review on Building-Integrated Photovoltaics Electrical System Requirements and Module-Integrated Converter Recommendations

A Review on Transformerless Step-Up Single-Phase Inverters with Different DC-Link Voltage for Photovoltaic Applications

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