Photovoltaic AC Module Based on a Cuk Converter With a Switched-Inductor Structure

Morais, Julio Cezar dos Santos de; Morais, Juliano Luiz dos Santos de; Gules, Roger

doi:10.1109/tie.2018.2856202

Cited by 53 publications

(21 citation statements)

References 14 publications

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“…In commercial PV installations it is common that the voltage and power provided by a single PV module are lower than the voltage and power required by the load. Hence, multiple PV modules are connected in different series and parallel configurations to meet the load requirements [3,4]. Also, different power converters topologies are used to adapt the PV voltage to the load requirement; those converters must exhibit high efficiency and, in some cases, high voltage-conversion ratio to feed the loads [5,6].…”

Section: Introductionmentioning

confidence: 99%

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

et al. 2020

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In this paper, a design method for a photovoltaic system based on a dual active bridge converter and a photovoltaic module is proposed. The method is supported by analytical results and theoretical predictions, which are confirmed with circuital simulations. The analytical development, the theoretical predictions, and the validation through circuital simulations, are the main contributions of the paper. The dual active bridge converter is selected due to its high efficiency, high input and output voltages range, and high voltage-conversion ratio, which enables the interface of low-voltage photovoltaic modules with a high-voltage dc bus, such as the input of a micro-inverter. To propose the design method, the circuital analysis of the dual active bridge converter is performed to describe the general waveforms derived from the circuit behavior. Then, the analysis of the dual active bridge converter, interacting with a photovoltaic module driven by a maximum power point tracking algorithm, is used to establish the mathematical expressions for the leakage inductor current, the photovoltaic current, and the range of operation for the phase shift. The design method also provides analytical equations for both the high-frequency transformer equivalent leakage inductor and the photovoltaic side capacitor. The design method is validated through detailed circuital simulations of the whole photovoltaic system, which confirm that the maximum power of the photovoltaic module can be extracted with a correct design of the dual active bridge converter. Also, the theoretical restrictions of the photovoltaic system, such as the photovoltaic voltage and power ripples, are fulfilled with errors lower than 2% with respect to the circuital simulations. Finally, the simulation results also demonstrate that the maximum power point for different environmental conditions is reached, optimizing the phase shift factor with a maximum power point tracking algorithm.

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Section: Introductionmentioning

confidence: 99%

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

et al. 2020

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“…For more enhancement of the voltage gain, the inverting ultra‐lift Luo converter has been designed and analyzed in References 19 and 20. In addition, various types of dc/dc step‐up topologies with a high voltage transfer gain have been proposed in References 21–30 during the last decades.…”

Section: Introductionmentioning

confidence: 99%

“…The conventional dc/dc boost converters presented in References 9–30 suffer from a slow dynamic response in continuous‐conduction mode (CCM) operation, because of existence of at least a RHPZ in their dynamic transfer function. Moreover, this RHPZ moves to the right hand of the complex S‐plane, when operating point of the power converters changes.…”

Section: Introductionmentioning

confidence: 99%

Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

Goudarzian

Khosravi

Raeisi

2020

Int Trans Electr Energ Syst

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Summary Conventional boost converters used for fuel‐cell applications suffer from a slow dynamic response, due to their non‐minimum phase nature. It is the main challengeable problem in the development of boost topologies working in continuous‐conduction mode (CCM). In order to eliminate the mentioned disadvantage, a boost converter is proposed in this article which is capable to give a high voltage gain. From viewpoint of the boosting feature, the proposed topology is more appropriate to connect a low input voltage to a higher dc voltage of load. Moreover, the duty‐cycle‐to‐output‐voltage transfer function of this converter is free from the right‐half‐plane zero (RHPZ) and therefore, its dynamics are simpler and faster compared with the classical boost converter. To cancel the RHPZ, improve the dynamic behavior and enhance the voltage transfer gain, a separate forward path is provided using a transformer and an additional capacitor in the output node for transferring the input energy to the output load during the switch‐on time interval of the power switch. For derivation of the converter model, the steady state analysis is given in details and the required equations are formulated. The transfer function expression is obtained using the averaging model of the converter and then, the description and comparisons are introduced to reveal the features and superiority of the proposed converter. Also, a laboratory set‐up of the suggested dc/dc boost converter working in CCM is built and tested.

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“…Entre os arranjos topológicos normalmente utilizados para esta aplicação, destacam-se topologias com dois estágios de processamento de energia [1]- [3], topologias de estágio único [4]- [6] e a estrutura chamada pseudo DC link, também conhecida como unfolding [7]- [8]. Nestas aplicações com geração CC em baixa tensão, a estrutura de dois estágios é mais usual por apresentar as funções de elevação e inversão separadamente, facilitando o desenvolvimento destas estruturas.…”

Section: Introductionunclassified

Inversor Monofásico Isolado Conectado À Rede Baseado Na Topologia Boost-Full-Bridge Com Redução Ativa Da Ondulação De Baixa Frequência Da Corrente De Entrada

Fae¹,

Gati²,

Gules³

et al. 2020

Eletrônica de Potência

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A grid-tie single phase inverter using the topology boost-full-bridge (BFB) is presented in this work. This DC-DC converter is used in an unfolding structure where positive current semi-cycles are modulated and a low frequency synchronized inverter produce a sinusoidal output current synchronized with the grid voltage. This topology presents soft-switching in all switches reducing the converter losses.

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Photovoltaic AC Module Based on a Cuk Converter With a Switched-Inductor Structure

Cited by 53 publications

References 14 publications

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

Design Method of Dual Active Bridge Converters for Photovoltaic Systems with High Voltage Gain

Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

Inversor Monofásico Isolado Conectado À Rede Baseado Na Topologia Boost-Full-Bridge Com Redução Ativa Da Ondulação De Baixa Frequência Da Corrente De Entrada

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