Single stage converters for low power stand-alone and grid-connected PV systems

Luigi, Gian; Brito, Moacyr A. G. de; Sampaio, Leonardo Poltronieri; Canesin, Carlos A.

doi:10.1109/isie.2011.5984200

Cited by 21 publications

(14 citation statements)

References 6 publications

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“…Conversely, the final structure will be different as most of them require boosting. Subsequently, the power of a single PV panel is low and strongly reliant on ambient temperature and solar irradiance (ambient conditions), therefore either a buck-boost or boost converter is required to attain an adequate DC-link voltage [95][96][97][98][99]. Figure 22 presents a H-bridge boosting PV inverter with low-frequency transformer, with highfrequency transformer, and without transformer, respectively.…”

Section: Control Structure For Single Phase and Three Phase Grid Connmentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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Abstract:The research significance of various scientific aspects of photovoltaic (PV) systems has increased over the past decade. Grid-tied inverters the vital elements for the effective interface of Renewable Energy Resources (RER) and utility in the distributed generation system. Currently, Single-Phase Transformerless Grid-Connected Photovoltaic (SPTG-CPV) inverters (1-10 kW) are undergoing further developments, with new designs, and interest of the solar market. In comparison to the transformer (TR) Galvanic Isolation (GI)-based inverters, its advantageous features are lower cost, lighter weight, smaller volume, higher efficiency, and less complexity. In this paper, a review of SPTG-CPV inverters has been carried out. The basic operational principles of all SPTG-CPV inverters are presented in details for positive, negative, and zero cycles. A comprehensive analysis of each topology has been deliberated. A comparative assessment is also performed based on weaknesses, strengths, component ratings, efficiency, total harmonic distortion (THD), semiconductor device losses, and leakage current of various SPTG-CPV inverters schemes. Typical PV inverter structures and control schemes for grid connected three-phase system and single-phase systems are also discussed, described, and reviewed. Comparison of various industrial grids-connected PV inverters is also performed. Loss analysis is also performed for various topologies at 1 kW. Selection of appropriate topologies for their particular application is thoroughly presented. Then, discussion and forthcoming progress are emphasized. Lastly, the conclusions are presented. More than 100 research publications on the topic of SPTG-CPV inverter topologies, configurations, and control schematics along with the recent developments are thoroughly reviewed and classified for quick reference.

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Section: Control Structure For Single Phase and Three Phase Grid Connmentioning

confidence: 99%

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

et al. 2018

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“…Desta forma, para a conexão com a rede em CA, o conversor deve realizar duas importantes tarefas como a elevação de tensão e a sua inversão [8]- [10]. Quando a isolação galvânica é obrigatória, a elevação de tensão pode ser obtida facilmente pela inserção de um transformador em baixa frequência do lado da rede ou pela utilização de um conversor isolado em alta frequência.…”

Section: Estágios De Potência Para Aplicações Fotovoltaicasunclassified

“…Quando a isolação galvânica é obrigatória, a elevação de tensão pode ser obtida facilmente pela inserção de um transformador em baixa frequência do lado da rede ou pela utilização de um conversor isolado em alta frequência. Ambas soluções apresentam problemas inerentes [10]. Entretanto, quando a isolação galvânica não é obrigatória a solução mais comum é o uso de um conversor CC-CC prévio ao estágio inversor, como mostra a Figura 1.…”

Section: Estágios De Potência Para Aplicações Fotovoltaicasunclassified

“…Ainda, a inserção de proteções externas como disjuntores e para-raios são interessantes nas instalações FV. A viabilidade das estruturas não isoladas cresce em virtude da redução de peso, volume e custos [1]- [10]. Um ponto a se adicionar é que com a eliminação do transformador de baixa frequência reduzem-se também os custos de produção e de transporte.…”

Section: Estágios De Potência Para Aplicações Fotovoltaicasunclassified

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Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Brito¹,

Alves²,

Canesin³

2017

Eletrônica de Potência

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Resumo -Este artigo apresenta comparações entre estruturas monofásicas a duplo estágio não isoladas, para aplicações em geração distribuída fotovoltaica (GD-FV), em conexão à rede de distribuição em baixa tensão. Considerando aplicação para GD-FV observou-se vantagens significativas para conversores com características naturais de fonte de corrente para a entrada, fato que reduz a capacitância de desacoplamento do sistema FV. ANALYSIS OF SINGLE-PHASE NON-ISOLATED INVERTER STRUCTURES APPLIED TO PHOTOVOLTAIC DISTRIBUTED GENERATIONAbstract -This paper presents comparisons among non-isolated DC to AC double-stage single-phase structures, applied to photovoltaic distributed generation (PV-DG), suitable to operate connected to the AC electric power network. Considering the PV-DG application, this paper has focused on converters with natural current source input characteristic which allows low capacitance value required for PV power decoupling. Simulation results and qualitative analysis are presented and experimental results from an application are discussed in order to confirm the feasibility of the proposal. The developed prototype is digitally controlled by a DSC, considering the designed firmware for MPPT, and in agreement with NBR-IEC 62116:2012 standard, including islanding and electrical protections.

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“…7, where an LCL-filter is used to achieve a satisfactory total harmonic distortion of the injected current. A variant ACmodule inverter has been introduced in [40], which is however a resultant integration of a boost converter and a full-bridge inverter. The main drawback of the integrated boost AC-module inverter is that it will introduce a zerocross current distortion.…”

Section: A Transformerless Ac Module Inverters (Module Integrated Pvmentioning

confidence: 99%

Overview of Single-phase Grid-connected Photovoltaic Systems

Yang

Blaabjerg

2015

Electric Power Components and Systems

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Single stage converters for low power stand-alone and grid-connected PV systems

Cited by 21 publications

References 6 publications

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

A Review on Recent Advances and Future Trends of Transformerless Inverter Structures for Single-Phase Grid-Connected Photovoltaic Systems

Análise De Estruturas Inversoras Não Isoladas Monofásicas Para Geração Distribuída Fotovoltaica

Overview of Single-phase Grid-connected Photovoltaic Systems

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