Small-signal Model for Dual-active-bridge Converter Considering Total Elimination of Reactive Current

Rodriguez-Rodrıguez, Juan Ramón; Salgado-Herrera, Nadia María; Tórres-Jiménez, J.; González-Cabrera, N.; Granados-Lieberman, David; Valtierra-Rodríguez, Martín

doi:10.35833/mpce.2018.000911

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…15 In literature, [16][17][18] the authors have proposed optimal control DAB DC-DC converter using DPS control with respect to different objectives such as efficiency, current stress, minimum rms current, and so on. In Rodriguez-Rodriguez et al, 19 the composite function is used in the controller for the elimination of reactive current in the DAB DC-DC converter has been proposed. The authors have done an analysis to show how reactive power varies with an improper combination of inner and outer-phase shift ratios under light load conditions in Liu et al 20 The inappropriate combination of shifting ratios may result in more circulating currents and large surge currents during the transient state and further reduces the actual active power transfer capability.…”

Section: Introductionmentioning

confidence: 99%

Optimal reactive power control for dual‐active‐bridge converter using improved dual‐phase‐shift modulation strategy for electric vehicle application

Chilakalapudi

Kumar

2022

Circuit Theory & Apps

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Dual active bridge (DAB) based DC-DC converters are in high demand for offering quick charging capacity to Electric vehicles (EVs). The conventional technique for DAB is based on single-phase-shift (SPS), though it provides simple control but suffers from high peaking in the inductor current under varying charging rates for EV and dc-link voltage ratio. In this paper, initially the expression for optimal reactive power flow into DAB converter under SPS and dual phase-shift (DPS) control techniques are thoroughly examined. Based on the analytical analysis, an improved dual-phase-shift modulation (IDPSM) method for real and reactive power control through a DAB converter is proposed for varying charging rates of an EV and dc-link voltage ratio. The proposed IDPSM control technique is implemented using the inverse perturb and observe (IPO) method that provides optimum inner phase-shift between the legs of the H-bridge to track minimum reactive power or back power flow into the system. This method automatically adjusts the inner and outer phase shift ratios under different loading conditions. Further, the proposed IDPSM scheme enhances the range of ZVS operation even under light load conditions, which is lacking with the conventional control techniques. The Lyapunov theory used to determine the stability of the DAB DC/DC converter. To validate the proposed control scheme, a detailed simulation is carried out using MATLAB/Simulink with a 2 kW system under varying charging rates of an EV. Further, to support the effectiveness of the proposed scheme, a comparison with different phase shift modulation schemes is also presented. Finally, an experimental prototype for DAB is developed to confirm the feasibility of the control technique. K E Y W O R D Sdual active bridge (DAB), dual-phase-shift (DPS), electric vehicle (EV), improved dualphase-shift modulation (IDPSM), reactive power, single-phase-shift (SPS)

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Section: Introductionmentioning

confidence: 99%

Optimal reactive power control for dual‐active‐bridge converter using improved dual‐phase‐shift modulation strategy for electric vehicle application

Chilakalapudi

Kumar

2022

Circuit Theory & Apps

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“…Relying on the development of the dual active bridge (DAB) [33]- [35], some DC custom power protection devices have been proposed. Based on the structure, the DC custom power devices (CPDs) can be categorized into two main classifications, i.e., series CPD (SCPD) and parallel CPD (PCPD).…”

Section: Introductionmentioning

confidence: 99%

Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

Yang

Jin

Zhou

et al. 2022

Journal of Modern Power Systems and Clean Energy

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The development of DC custom power protection devices is still in infancy that confines the sensitive loads integrated into medium-voltage (MV) and low-voltage (LV) DC networks. Considering the DC doubly-fed induction generator (DC-DFIG) based wind energy conversion system (WECS), this paper proposes a dual active bridge (DAB) based DC unified power quality conditioner (DC-UPQC) with the integration of superconducting magnetic energy storage (SMES) to maintain the terminal voltage of DC-DFIG and regulate the current flow. The principle of the proposed DC-UPQC has three parts, i.e., parallel-side DAB (PDAB), series-side DAB (SDAB), and SMES, used for the voltage compensation, current and power regulation, and energy storage, respectively. The circuit principle of the PDAB and SDAB and the modeling of SMES are analyzed in this paper. A DC dual control strategy is also proposed to deal with the DC voltage oscillation generated by the AC-side asymmetrical fault. A case study of DC-DFIG interfaced with DC power grid is carried out, integrated with the proposed SMES-based DC-UPQC to verify the high-power applications of the proposed structure. Finally, an experiment is implemented, and the results demonstrate the correctness of the theoretical analysis and the feasibility of the proposed structure.

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“…Many modulation schemes have been proposed for DAB converters, such as single-phase-shift modulation (SPS) and multi-phase-shift modulation (MPS). With more degrees of freedom and independent control variables of these modulation methods, control strategies for different optimization goals have been reported [6,7], such as minimum reactive current and power [8,9], minimum conduction loss [10], and a full power operation range for soft switching [11]. Nevertheless, the power calculation of these optimization methods is complex, and the operational mode is variable.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a High-Frequency Isolated Dual-Transformer DC-DC Resonant Converter

Wang

Zhong

et al. 2022

Electronics

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This paper presents the operation, analysis, design, simulation, and experimental results for a proposed Dual-Transformer DC-DC Resonant Converter (DTRC). A three-arm bridge is employed on the input side and an H-type bridge is employed on the output side of the DTRC, and the two bridges are connected with two high-frequency (HF) transformers. By optimizing the ratio k of the two HF transformers, the proposed DTRC has a lower boundary power for losing zero-voltage switching (ZVS). That means the DTRC has a wider ZVS operation range and lower switching loss when compared with a traditional soft-switching pulse width modulation (PWM) resonant converter. The operation principle, power transfer, ZVS characteristics, and design procedures are analyzed in detail. Both simulation and experimental results prove the feasibility and superiority of the proposed Dual-Transformer DC-DC Resonant Converter.

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Small-signal Model for Dual-active-bridge Converter Considering Total Elimination of Reactive Current

Cited by 6 publications

References 18 publications

Optimal reactive power control for dual‐active‐bridge converter using improved dual‐phase‐shift modulation strategy for electric vehicle application

Optimal reactive power control for dual‐active‐bridge converter using improved dual‐phase‐shift modulation strategy for electric vehicle application

Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG

Analysis and Design of a High-Frequency Isolated Dual-Transformer DC-DC Resonant Converter

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