Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Tang, Yuting; Li, Xiaodong; Zhou, Sheng‐Zhi; Sun, Chuan; Chen, Guo

doi:10.1049/iet-pel.2018.5894

Cited by 17 publications

(3 citation statements)

References 27 publications

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“…To eliminate DC offset in both inductor current and transformer magnetizing current, duty cycles of v ab , v cd and their phase shifts have to be manipulated [79]. The two-step methods have been concluded, reviewed and compared in [86], and this method is extended to DAB converters using TPS [87].…”

Section: Some Practical Control Issuesmentioning

confidence: 99%

Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review

Shao

Chen

Shan

et al. 2022

IEEE Trans. Power Electron.

151

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Section: Some Practical Control Issuesmentioning

confidence: 99%

Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review

Shao

Chen

Shan

et al. 2022

IEEE Trans. Power Electron.

151

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“…To eliminate the DC bias current, a fast transient phase-shift strategy is initially proposed for a DAB converter [21]. By adopting the fast transient phase-shift strategy, all possible transient processes are discussed in detail [22]. Some improved transient phaseshift strategies have been developed to reduce the DC bias current [23,24].…”

Section: Introductionmentioning

confidence: 99%

Transient Modulation for the Step-Load-Change Process in a Dual-Bridge Series Resonant Converter

Zhou

et al. 2022

Electronics

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A phase-shifted dual-bridge series resonant DC-DC converter (DBSRC) is a competitive candidate for applications of an energy storage system. At the request of a step-load-change command such as the start-up and power-level change, the converter may suffer from large-amplitude transient oscillations due to improper transient modulation. Furthermore, the DC bias current and overshoot current/voltage in the resonant tank and transformer caused by oscillations may result in transformer saturation and poor dynamic performance. To solve these problems, two fast transient modulation (FTM) methods are proposed in this paper. First, based on the steady-state analysis of the converter with phase-shift control, the current and voltage trajectory of the resonant capacitor can be obtained. Then, the detailed principles of two FTM methods are explained for achieving a smooth transition. Through the adjustment of the durations of the adjacent switching intervals temporarily, the transient trajectory can be predicted and is expected to match the destination trajectory within one switching period. Consequently, the proposed FTM methods enable the converter to move from one steady state to another instantly and the step-load-change transition can be an overshoot-free procedure. Finally, both simulation and experimental tests prove that the two modulation methods can effectively eliminate DC bias current and overshoot current/voltage in the DBSRC transient process and obtain a fast transient response.

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“…However, these strategies are not suitable for applications with high‐voltage conversion ratios. Tang et al [18] discussed different solutions for fast load transitions in a DAB converter, while a simple and generic model of a DAB converter that is valid for its operation range and modulation strategies has been presented in [19].…”

Section: Introductionmentioning

confidence: 99%

Modulation strategy for improving the voltage gain of the dual‐active‐bridge converter

Wang

et al. 2020

IET Power Electronics

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A novel modulation strategy for improving the voltage gain of a dual-active-bridge converter is proposed herein. Under the strategy, the converter performs a high-voltage gain under a low transformer turns ratio, thereby improving the transmission efficiency of the transformer because the large turns ratio typically results in large parasitic parameters, such as leakage inductance or distributed capacitance. In addition, voltage spikes can be avoided as the energy caused by leakage inductance is recycled to the output side. The operating principle of the proposed modulation strategy is discussed in detail herein. Moreover, the zero-voltage switching conditions in both buck and boost modes are analysed and derived. Finally, a prototype with a 350 V high voltage, 48 V low voltage, and 1 kW output power is established, and the conversion efficiencies of 94.2% in buck mode and 93.2% in boost mode are obtained. Experimental results verify the validity of the proposed modulation strategy.

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Comprehensive study of fast load modulation with volt‐second balance in a dual‐active‐bridge converter

Cited by 17 publications

References 27 publications

Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review

Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review

Transient Modulation for the Step-Load-Change Process in a Dual-Bridge Series Resonant Converter

Modulation strategy for improving the voltage gain of the dual‐active‐bridge converter

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