Differential Power Processing for DC Systems

Shenoy, Pradeep S.; Krein, P.T.

doi:10.1109/tpel.2012.2214402

Cited by 85 publications

(28 citation statements)

References 32 publications

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“…Moreover, the charging process in a series of battery stacks can be equalized by processing charging power individually, which will increase the overall charging system efficiency [25]- [27], [238]. To cope with these issues in series sources/loads, partial power processing (or differential power processing) has been introduced [28] as a means for processing a fraction of each source more efficiently and only if necessary, e.g., by processing the difference maximum power current between two PV panels or diverting the current path of one charged battery pack to another.…”

Section: E Multistage/-levelmentioning

confidence: 99%

Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications

Forouzesh

Siwakoti

Gorji

et al. 2017

IEEE Trans. Power Electron.

1,449

647

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DC-DC converters with voltage boost capability are widely used in a large number of power conversion applications, from fraction-of-volt to tens of thousands of volts at power levels from milliwatts to megawatts. The literature has reported on various voltage-boosting techniques, in which fundamental energy storing elements (inductors and capacitors) and/or transformers in conjunction with switch(es) and diode(s) are utilized in the circuit. These techniques include switched capacitor (charge pump), voltage multiplier, switched inductor/voltage lift, magnetic coupling, and multistage/-level, and each has its own merits and demerits depending on application, in terms of cost, complexity, power density, reliability, and efficiency. To meet the growing demand for such applications, new power converter topologies that use the above voltage-boosting techniques, as well as some active and passive components, are continuously being proposed. The permutations and combinations of the various voltage-boosting techniques with additional components in a circuit allow for numerous new topologies and configurations, which are often confusing and difficult to follow. Therefore, to present a clear picture on the general law and framework of the development of next-generation step-up dc-dc converters, this paper aims to comprehensively review and classify various step-up dc-dc converters based on their characteristics and voltage-boosting techniques. In addition, the advantages and disadvantages of these voltage-boosting techniques and associated converters are discussed in detail. Finally, broad applications of dc-dc converters are presented and summarized with comparative study of different voltage-boosting techniques.

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Section: E Multistage/-levelmentioning

confidence: 99%

Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications

Forouzesh

Siwakoti

Gorji

et al. 2017

IEEE Trans. Power Electron.

1,449

647

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“…1, the MIMO-MMC's modules are constructed from buck-boost converters similar to modules used for equalization of battery cells [35], solar cells [36], [37], and other low power applications [38], [39]. For applications which require bidirectional module inductor currents, bidirectional switches such as MOSFETs or IGBTs with anti-parallel diodes must be utilized for S a[k,j] and S b[k,j] .…”

Section: Proposed Topology Structurementioning

confidence: 99%

A Bidirectional Multiple-Input Multiple-Output Modular Multilevel DC–DC Converter and its Control Design

Filsoof

Lehn

2016

IEEE Trans. Power Electron.

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This work introduces a multiple-input multipleoutput modular multilevel dc-dc converter (MIMO-MMC) and its associated control scheme. The proposed topology has a bidirectional structure and may be utilized in both low and high power applications ranging from approximately 100W to 10MW. The modular structure of the MIMO-MMC enables efficient component utilization through module voltage and current sharing capabilities. The topology can supply or extract regulated power from an arbitrary number of controllable voltage nodes without requiring source or load multiplexing, resulting in minimized filtering requirements. The MIMO-MMC's structure is described, and the steady state operation of the converter is theoretically analyzed. The dynamic models of the converter for both step-down and step-up configuration are derived and employed to devise an effective control algorithm for closed-loop operation. A general method is provided for stability analysis of the proposed closed-loop system followed by a case study verifying stability of the system at different operating points. The steady state operation and dynamic response of the converter under both configurations is investigated through simulation and experiment.

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“…Methods have been investigated by research teams to avoid high conversion ratios at various stages but accurate voltage regulation between stages can be compromised [19]. Recent approaches in academia for improving data center efficiency have investigated power converter efficiency improvements by using hardware approaches with wide bandgap power devices, [25], or sophisticated controllers that actively regulate individual server voltages with differential power processing techniques, [19,26].…”

Section: Data Center Challenges and Approaches Towards Improved Systementioning

confidence: 99%

Power Quality in DC Power Distribution Systems and Microgrids

2015

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This review paper discusses power quality considerations for direct current (DC) electric power distribution systems, particularly DC microgrids. First, four selected sample DC architectures are discussed to provide motivation for the consideration of power quality in DC systems. Second, a brief overview of power quality challenges in conventional alternating current (AC) distribution systems is given to establish the field of power quality. Finally, a survey of literature addressing power quality issues in DC systems is presented, and necessary power quality considerations in DC distribution system design and operation are discussed.

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Differential Power Processing for DC Systems

Cited by 85 publications

References 32 publications

Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications

Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications

A Bidirectional Multiple-Input Multiple-Output Modular Multilevel DC–DC Converter and its Control Design

Power Quality in DC Power Distribution Systems and Microgrids

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