Modulation and Active Midpoint Control of a Three-Level Three-Phase Dual-Active Bridge DC-DC Converter under Non-Symmetrical Load

Joebges, Philipp; Gorodnichev, Anton; Doncker, Rik W. De

doi:10.23919/ipec.2018.8507930

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…That is, imbalance is corrected by slightly modifying the position of the switching angles to inject or draw current from the DC-link neutral point. This imbalance correction method is applied to single-phase DAB with 3-level [164,165], 4-level [166], n-level [81,167], and three-phase 3-level DAB [168]. A different balancing method is found in [169,170] for a single-phase 3-level DAB, where different switching sequences are applied in each switching period to inject or draw current from the DC-link neutral point, depending on the sign of the DC-link voltage imbalance.…”

Section: Balance In Dc-dc Conversionmentioning

confidence: 99%

A Survey on Capacitor Voltage Control in Neutral-Point-Clamped Multilevel Converters

et al. 2022

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Neutral-point-clamped multilevel converters are currently a suitable solution for a wide range of applications. It is well known that the capacitor voltage balance is a major issue for this topology. In this paper, a brief summary of the basic topologies, modulations, and features of neutral-point-clamped multilevel converters is presented, prior to a detailed description and analysis of the capacitor voltage balance behavior. Then, the most relevant methods to manage the capacitor voltage balance are presented and discussed, including operation in the overmodulation region, at low frequency-modulation indexes, with different numbers of AC phases, and with different numbers of levels. Both open- and closed-loop methods are discussed. Some methods based on adding external circuitry are also presented and analyzed. Although the focus of the paper is mainly DC–AC conversion, the techniques for capacitor voltage balance in DC–DC conversion are discussed as well. Finally, the paper concludes with some application examples benefiting from the presented techniques.

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Section: Balance In Dc-dc Conversionmentioning

confidence: 99%

A Survey on Capacitor Voltage Control in Neutral-Point-Clamped Multilevel Converters

et al. 2022

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“…The soft switching range of the three-level DAB converter was analyzed and expanded in [17]- [19]. Literature [20], [21] investigated the characteristics of the three-level three-phase DAB converter. Nevertheless, none of the bidirectional three-level DC-DC converters mentioned above have an enough wide output voltage range for electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

A Three-Level Dual-Active-Bridge Converter With Blocking Capacitors for Bidirectional Electric Vehicle Charger

et al. 2019

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In order to solve the considerable issues of air pollution, climate warming and fossil energy shortage, many governments around the world have formulated policies to encourage the development of electric vehicles over the past decade. This paper proposes a three-level dual-active-bridge (DAB) converter with blocking capacitors for bidirectional electric vehicle charger. In the proposed three-level DAB converter, two blocking capacitors are placed in series with the two windings of the transformer, respectively. Both of the two three-level bridges can operate in four modes, and generate square waves with four kinds of amplitude. Therefore, the proposed three-level DAB converter can adapt to the wide voltage range of electric vehicle. A working mode selection algorithm is developed to minimize the transformer RMS current of the three-level DAB converter. The optimal working mode can be selected in real time according to the voltage ratio and the active power. Finally, experimental results are presented to verify the feasibility and the advantage of the proposed three-level DAB converter.INDEX TERMS Asymmetric, blocking capacitor, dual-active-bridge, three-level.

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Comparison and performance evaluation of the mid-point voltage balance modulation schemes for a three-phase 2L-3L DAB

Agarwal,

Sharma,

Bhattacharya

2023

2023 IEEE Energy Conversion Congress and Exposition (ECCE)

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Modulation and Active Midpoint Control of a Three-Level Three-Phase Dual-Active Bridge DC-DC Converter under Non-Symmetrical Load

Cited by 8 publications

References 12 publications

A Survey on Capacitor Voltage Control in Neutral-Point-Clamped Multilevel Converters

A Survey on Capacitor Voltage Control in Neutral-Point-Clamped Multilevel Converters

A Three-Level Dual-Active-Bridge Converter With Blocking Capacitors for Bidirectional Electric Vehicle Charger

Comparison and performance evaluation of the mid-point voltage balance modulation schemes for a three-phase 2L-3L DAB

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