An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures

Agamy, Mohammed; Todorovic, Maja Harfman; Elasser, Ahmed; Chi, Song; Steigerwald, R.L.; Sabate, Juan; McCann, Adam J.; Zhang, Li; Mueller, Frank

doi:10.1109/tpel.2013.2255315

Cited by 121 publications

(52 citation statements)

References 30 publications

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“…N [1] and [2], high-efficient high power density series-type partial power processing topology, implemented with silicon carbide devices, maximizing solar energy harvesting capabilities, was discussed. Series-type partial photovoltaic power processing arrangement under consideration is shown in Fig.…”

Section: Indexmentioning

confidence: 99%

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Suntio

Kuperman

2015

IEEE Trans. Power Electron.

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In the paper "An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures" by M. S. Agamy et al. (IEEE Trans. Power Electron., vol. 29, no. 2, Feb. 2014), a DC-DC converter for distributed photovoltaic plant architectures, capable of performing series-type partial power processing under maximum-power-point control was proposed and tested for various performance parameters. The purpose of this note is correcting [1] by proving that while the overall operation and results are technically correct, the proposed converter is actually a boost stage performing full rather than partial power processing.This is the author's version of an article that has been published in this journal. Changes were made to this version by the publisher prior to publication.The final version of record is available at http://dx.

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Section: Indexmentioning

confidence: 99%

Comments on “An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures”

Suntio

Kuperman

2015

IEEE Trans. Power Electron.

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“…Quanto menor essa diferença de tensão, menor é a potência ativa processada pelo conversor em relação à potência de saída do sistema [4]. Uma vez que a tensão no MPP apresenta uma pequena faixa de variação em tensão, em torno de 20 % [4], [5], esta característica torna os reguladores série adequados para realizar o MPPT em sistemas fotovoltaicos na configuração multi-string, conforme ilustrado na Figura 2. Isso possibilita a utilização de conversores com baixa potência ativa nominal, processando somente a quantidade de energia necessária para regular os níveis de tensão e corrente de entrada da string, permitindo o MPPT individual da string, enquanto que a tensão V out é regulada pelo inversor central.…”

Section: Introductionunclassified

“…Entretanto, sua aplicação em conversores CC-CC ainda é mal compreendida na literatura especializada. Isso é verificado ao observar as contradições existentes entre os trabalhos publicados a respeito do conceito de PPP [5], [7]- [9]. Em [9], por exemplo, os autores afirmam que a topologia utilizada como regulador série deve ser obrigatoriamente isolada para garantir o PPP, e utilizam a topologia flyback como regulador série.…”

Section: Introductionunclassified

“…Em [9], por exemplo, os autores afirmam que a topologia utilizada como regulador série deve ser obrigatoriamente isolada para garantir o PPP, e utilizam a topologia flyback como regulador série. No entanto, em [5] é apresentado um sistema que utiliza a topologia não isolada buck-boost como regulador série afirmando se tratar de uma topologia que realiza o processamento parcial e energia, afirmação que é refutada em [8] Embora a potência ativa no regulador série seja menor do que em uma topologia convencional, a conexão série não é uma condição suficiente para garantir o PPP. Isso é demonstrado em [10], onde um estudo de caso do conversor buck-boost conectado como regulador série demonstrou apresentar um desempenho similar, em termos de processamento de energia e eficiência, à um conversor convencional que processa toda potência ativa.…”

Section: Introductionunclassified

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Processamento Parcial De Energia Em Conversores CC-CC Conectados Na Configuração De Reguladores Série

Zientarski¹,

Martins²,

Pinheiro³

et al. 2017

Eletrônica de Potência

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Resumo -Este trabalho apresenta um procedimento para avaliação do processamento parcial de energia em conversores CC-CC que operam como reguladores série. Por meio da análise da potência ativa e não-ativa, o procedimento permite distinguir quais topologias de conversores processam menor quantidade de energia e por isso podem ser consideradas topologias com processamento parcial de energia. Como estudo de caso, são abordadas as topologias originalmente isoladas flyback e forward conectadas como reguladores série, comprovando que o regulador série forward pode realizar o processamento parcial em uma faixa de ganho de tensão dependendo da relação de espiras utilizada no transformador, enquanto que o regulador série flyback processa a mesma quantidade de energia que um conversor convencional não isolado. São apresentados resultados experimentais de dois protótipos de 750 W para validar a abordagem proposta. Palavras-chave - PARTIAL POWER PROCESSING ON DC/DC CONVERTERS CONNECTED AS SERIES REGULATORSAbstract -This paper presents a procedure to evaluate the partial power processing on DC/DC converters with series regulators by analyzing the active and non-active power.This allows to distinguish what topologies performs, or not, the partial power processing. As a case study, the originally isolated flyback and forward topologies connected as series regulators are investigated, proving that the forward series regulator can perform partial power processing in a range of voltage gain depending on the transformer turns ratio, whereas the flyback series regulator processes the same amount of energy as a conventional non-isolated converter. In order to verify the proposed approach, experimental results of two 750 W prototypes are presented.

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“…INTRODUCTION HE primary advantage of a boost inverter compared to a conventional voltage source inverter is that a boost inverter can transfer electric power from a low dc voltage to a higher ac voltage level in a single stage with no need for a step-up transformer or a cascaded dc-dc boost converter [1]- [5]. Therefore, boost inverter is a suitable dc-ac converter to generate three-phase voltage from a parallel set of small dc sources (e.g., photovoltaic panels), which is typically more reliable than the series connected dc sources [6], [7]. To assist the penetration of the boost inverter into renewable energy systems, further investigations are still needed, e.g., dynamic behaviors of the boost inverter must be examined prior to realizing its potential capabilities.…”

mentioning

confidence: 99%

On Dynamic Models and Stability Analysis of Three-Phase Phasor PWM-Based CSI for Stand-Alone Applications

Singh

Kaviani

Mirafzal

2015

IEEE Trans. Ind. Electron.

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The Phasor PWM (PPWM)-based Current Source Inverter (CSI) is a boost inverter. The difference between conventional CSIs and the boost inverter is that the boost ratio ( / ) in the boost inverter can easily be above 3.0, whereas this ratio is around one in conventional CSIs. In order to realize potential capabilities of the boost inverter and to assist its penetration into renewable energy systems, the boost inverter dynamic behaviors are studied in this paper. First, the large-and small-signal models as well as the -equivalent circuits of the boost inverter are presented. Then, the developed models are verified using circuit simulations and experiments on a laboratory-scale 2kW, 208/240VLLrms, = 65V boost inverter made of reverse-blocking IGBTs (RB-IGBTs). Finally, the developed small-signal model is used to study the stability of the boost inverter through root locus of small signal poles (eigenvalues) as control inputs and load parameters vary within the boost inverter's operating limits.Index Terms -Renewable energy sources, single-stage boost inverter, stability analysis, stand-alone conditions, state-spaceaveraged model.

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An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures

Cited by 121 publications

References 30 publications

Comments on “An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures”

Comments on “An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures”

Processamento Parcial De Energia Em Conversores CC-CC Conectados Na Configuração De Reguladores Série

On Dynamic Models and Stability Analysis of Three-Phase Phasor PWM-Based CSI for Stand-Alone Applications

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