Optimal Phase-Shift Control to Minimize Reactive Power for a Dual Active Bridge DC–DC Converter

Shao, Shuai; Jiang, Mingming; Ye, Weiwen; Li, Yucen; Zhang, Junming; Sheng, Kuang

doi:10.1109/tpel.2018.2890292

Cited by 134 publications

(67 citation statements)

References 22 publications

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“…Therefore, analysis of the resonant tank's input root-mean-square (RMS) current (IRMSC) and output RMS current (ORMSC) is very important. For LLCL, according to (1), (4), (9), and (10), time domain expressions of the resonant tank's input current (iin_F(t) in forward mode, iin_B(t) in backward mode) and output current (iout_F(t) in forward mode, iout_B(t) in backward mode) can be totally shown in (11). Based on (11) and the variables announced in (6), by taking the dc output current as the base value, the normalized IRMSC Iin(norm) and the normalized ORMSC Iout(norm) can be given by (12).…”

Section: ) Input and Output Currents Of The Resonant Tankmentioning

confidence: 99%

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A Bidirectional LLCL Resonant DC-DC Converter With Reduced Resonant Tank Currents and Reduced Voltage Stress of the Resonant Capacitor

Wang

et al. 2020

IEEE Access

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In this paper, a bidirectional inductor-inductor-capacitor-inductor (LLCL) resonant dc-dc converter is presented. Compared with the conventional LLC, a parallel-connected inductors structure is employed into the resonant tank. By virtue of this unique resonant tank, LLCL exhibits the following desirable features: 1) good voltage gain regulation capability in bidirectional power flow applications; 2) zero-voltage-switching turn-on of the power switches in a wide load range; 3) compared with the other bidirectional LLC-type resonant converters, lower resonant tank currents and lower resonant capacitor voltage stress are achieved under the same working conditions. The topology derivation and operating principles of LLCL are shown, and the vital characteristics of LLCL are especially discussed. Moreover, based on battery applications in energy storage systems, in order to make the voltage gain range of LLCL meet the requirements while minimizing the resonant tank currents, a parameter design method is conducted. Finally, a 500-W prototype is established to verify the operating principles and design effects of the proposed converter. INDEX TERMS Bidirectional power transmission, energy storage system, isolated dc-dc converter, LLCtype resonant converter.

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Section: ) Input and Output Currents Of The Resonant Tankmentioning

confidence: 99%

“…As a result, various improvements have been proposed. To minimize the reactive power, the global optimal phase shift ratios under four scenarios (forward/backward, buck/boost) are proposed in [11]. To broaden the ZVS range, the auxiliary LC networks and the auxiliary coupling inductor are employed into DAB in [12] and [13], respectively.…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional LLCL Resonant DC-DC Converter With Reduced Resonant Tank Currents and Reduced Voltage Stress of the Resonant Capacitor

Wang

et al. 2020

IEEE Access

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“…Firstly, many approaches use steady-state time-domain analysis or small-signal statespace modeling techniques [25], [26]. Using the time domain analysis DAB operation was characterized into twelve operating modes in [27] and later simplified into five operating modes using graphical method in [28]. Furthermore, computationally intensive numerical approaches that incorporate the effect of parasitic capacitances were used to derive ZVS boundaries [23].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the higher number of degrees of freedom and superpositions of port voltages applied to a transformer, the TAB converters have several tens of operating modes. The complexity makes the use of graphical methods such as [28] or computational intensive methods such as [23] less insightful.…”

Section: Introductionmentioning

confidence: 99%

Zero Voltage Switching Criteria of Triple Active Bridge Converter

Purgat

Bandyopadhyay

Qin

et al. 2021

IEEE Trans. Power Electron.

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Triple active bridge (TAB) as an isolated multi-port converter is a promising integrated energy system for smart grids or electric vehicles. This paper aims to derive and analyse zero voltage switching (ZVS) regions of TAB, in which both switching losses are reduced, and EMI issues are mitigated. In the proposed closed-form solution of ZVS criteria, parameters such as the parasitic capacitance of the switches, the leakage inductance of the transformer, the switching frequency, the port voltage, the phase-shift inside and between the full-bridges are all taken into account. The analysis shows how the five degrees of freedom can be used to maintain ZVS operation in various operating points. The analysis and derived closed-form ZVS criteria are experimentally verified using a laboratory prototype. The derived analytical ZVS criteria are a powerful tool to study and optimise the operation of TAB converters.

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“…However, the energy conversion efficiency with the CPS is limited due to high circulating current and narrow soft-switching range [11]. Thus, a great deal of advanced phase-shift strategies have been proposed in [12]- [17], which present the operation principle of multi-…”

Section: Introductionmentioning

confidence: 99%

Open-Circuit Fault Diagnosis of Dual Active Bridge DC-DC Converter With Extended-Phase-Shift Control

et al. 2019

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This paper proposes a simple and fast fault diagnosis strategy for bidirectional isolated dual-active-bridge dc-dc converter with the extended-phase-shift control to improve reliability. The fault diagnosis strategy utilizes the average values of the voltage to quickly identify failures position and devices in either transistors or diodes without adding any hardware cost. First, two conditions are classified according to the direction of the inductor current on the primary side. Then, a comprehensive operation analysis during normal and faulty conditions is presented. Based on the characterization of open-circuit faults in diodes and transistors, open circuit faults diagnose strategy is derived and validated through both simulation and experimental test for different fault conditions. INDEX TERMS Bidirectional DC-DC converter, extended-phase shift control, fault diagnosis, reliability.

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Optimal Phase-Shift Control to Minimize Reactive Power for a Dual Active Bridge DC–DC Converter

Cited by 134 publications

References 22 publications

A Bidirectional LLCL Resonant DC-DC Converter With Reduced Resonant Tank Currents and Reduced Voltage Stress of the Resonant Capacitor

A Bidirectional LLCL Resonant DC-DC Converter With Reduced Resonant Tank Currents and Reduced Voltage Stress of the Resonant Capacitor

Zero Voltage Switching Criteria of Triple Active Bridge Converter

Open-Circuit Fault Diagnosis of Dual Active Bridge DC-DC Converter With Extended-Phase-Shift Control

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