A High-Power-Density DC–DC Converter for Distributed PV Architectures

Agamy, Mohammed; Chi, Song; Elasser, Ahmed; Todorovic, Maja Harfman; Jiang, Yan; Mueller, Frank; Tao, Fengfeng

doi:10.1109/jphotov.2012.2230217

Cited by 42 publications

(18 citation statements)

References 18 publications

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“…1, where vIN is photovoltaic module voltage, regulated by a maximum power point (MPP) tracker; vS is the DC-DC converter (operating as partial power processor (PPP)) output voltage and vBUS = vIN + vS is grid-connected inverter regulated input voltage. As explained in [1] and [2], PPP rating depends on the vIN/vBUS voltage ratio.…”

Section: Indexmentioning

confidence: 97%

“…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%

“…This outcome is supported by the fact that since both vIN and vBUS are regulated, vS is indirectly regulated as well; thus no average current flows through CS in steady state. According to (2), the power stage is actually a basic boost converter where all the active power flows through the inductor L; hence the proposed converter performs full rather than partial power processing. In order to realize a series-type partial power processor, direct power link must exist between the source and the load.…”

Section: Fig 2 Dc-dc Converter Proposed As Ppp In [1] and [2]mentioning

confidence: 99%

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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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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: 97%

Section: Indexmentioning

confidence: 99%

Section: Fig 2 Dc-dc Converter Proposed As Ppp In [1] and [2]mentioning

confidence: 99%

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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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“…Finally, simulated concentrator transmission efficiency and electrical efficiency are included. DC‐DC power conditioning efficiency of 98% and 2% series resistance loss is included. DC‐DC power conditioning is used to combine the power from the four independently electrically connected subcells.…”

Section: Module Efficiency Projectionmentioning

confidence: 99%

Simulation and partial prototyping of an eight‐junction holographic spectrum‐splitting photovoltaic module

Darbe

Escarra

Warmann

et al. 2019

Energy Science & Engineering

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Spectrum‐splitting photovoltaics incorporate optical elements to separate sunlight into frequency bands, which can be targeted at solar cells with bandgaps optimized for each sub‐band. Here, we present the design of a holographic diffraction grating‐based spectrum‐splitting photovoltaic module integrating eight III‐V compound semiconductor cells as four dual‐junction tandems. Four stacks of simple sinusoidal volume phase holographic diffraction gratings each simultaneously split and concentrate sunlight onto cells with bandgaps spanning the solar spectrum. The high‐efficiency cells get an additional performance boost from concentration incorporated using a single or a compound trough concentrator, providing up to 380X total concentration. Cell bandgap optimization incorporated an experimentally derived bandgap‐dependent external radiative efficiency function. Simulations show 33.2% module conversion efficiency is achievable. One grating stack is experimentally fabricated and characterized.

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“…Short switching times of wide-bandgap elements lead to low switching energy losses and, therefore, frequency may be elevated in order to decrease size and weight of the passive elements-inductors and capacitors. This approach is very beneficial, as passive elements greatly contribute to volume and weight of the system and, in consequence, the power density may be noticeably increased [6,12,13]. On the other hand, a hard-switching operation at hundreds of kHz, even with newest SiC or GaN (Gallium Nitride) transistors, reduces an efficiency of the DC-DC converter.…”

Section: Introductionmentioning

confidence: 99%

Highly-Efficient and Compact 6 kW/4 × 125 kHz Interleaved DC-DC Boost Converter with SiC Devices and Low-Capacitive Inductors

2017

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This paper describes a four-leg interleaved DC-DC boost converter built on the basis of Silicon Carbide (SiC) devices (Metal-Oxide Semiconductor Field-Effect Transistors-MOSFETs and Schottky diodes) and improved, low-capacitive magnetic components. A combination of wide-bandgap semiconductors capable of operating at elevated switching frequencies and an interleaving technique brings substantial benefits, such as a cancellation of the input/output current ripples, a reduction of weight, dimensions and increase of power density. The 4 × 125 kHz DC-DC boost converter characterized by a volume of 0.75 dm 3 reaches an efficiency above 98.7% at nominal power of 6 kW. A special effort has been made to develop and test inductors with low parasitic capacitance. It is clearly proven that an improved design has an impact on the converter performance, especially on power losses. Reduction of the power losses is higher than 25% in reference to a standard design of the inductors and the efficiency is in excess of 99%.

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A High-Power-Density DC–DC Converter for Distributed PV Architectures

Cited by 42 publications

References 18 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”

Simulation and partial prototyping of an eight‐junction holographic spectrum‐splitting photovoltaic module

Highly-Efficient and Compact 6 kW/4 × 125 kHz Interleaved DC-DC Boost Converter with SiC Devices and Low-Capacitive Inductors

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