Triple Phase Shift Control of an LLL Tank Based Bidirectional Dual Active Bridge Converter

Muthuraj, Shiva S.; Kanakesh, V. K.; Das, Pritam; Panda, Sanjib Kumar

doi:10.1109/tpel.2016.2637506

Cited by 83 publications

(30 citation statements)

References 29 publications

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“…Similar to the DPS modulation method, both sides of the H bridge output voltages contain the inner phase-shift ratios, but these two-inner phaseshift ratios may be different. With three phase-shift ratios D 1 , D 2 , and D 3 for the NSDAB converter, the TPS modulation method can obtain the minimum current stress, minimum conducting losses, minimum power losses, and maximum ZVS range [17], [32], [33], [47], [48].…”

Section: Tps Modulation Methodsmentioning

confidence: 99%

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Hou

2020

IEEE Trans. Power Electron.

377

119

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The nonresonant single-phase dual-active-bridge (NSDAB) dc-dc converter has been increasingly adopted for isolated dc-dc power conversion systems. Over the past few years, significant research has been carried out to address the technical challenges associated with modulations and controls of the NSDAB dc-dc converter. The aim of this paper is to review and compare these recent state-of-the-art modulation and control strategies. First, the modulation strategies for the NSDAB dc-dc converter are analyzed. All possible phase-shift patterns are demonstrated, and the correlation analysis of the typical phases-shift modulation methods for the NSDAB dc-dc converter is presented. Then, an overview of steady-state efficiency-optimization strategies is discussed for the NSDAB dc-dc converter. Moreover, a review of optimized techniques for dynamic responses is also provided. For both the efficiency and dynamic optimizations, thorough comparisons and recommendations are provided in this paper. Finally, to improve both steady-state and transient performances, a combination approach to optimize both the efficiency and dynamics for an NSDAB dc-dc converter based on the reviewed methods is presented in this paper. Index Terms-Current feedback control, current stress, dualactive-bridge (DAB) converter, dynamic performances, efficiency, observer-based control, power control, power losses, reactive power. NOMENCLATURENSDAB Nonresonant single-phase dual-active-bridge. EV Electrical vehicle. SST Solid-state transformer. BTB Back-to-back. MMDCT Modular multilevel dc-link solid-state transformer. SPS Single-phase-shift. ZVS Zero-voltage-switching. DPS Dual-phase-shift. EPS Extended-phase-shift. TPS Triple-phase-shift.

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Section: Tps Modulation Methodsmentioning

confidence: 99%

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Hou

2020

IEEE Trans. Power Electron.

377

119

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“…Depending on the sequence in time of the dropping and rising edges of 1 and , six operating modes for bidirectional power flow can be identified. Modes 1 and modes 4 exist both in forward and reverse power flows, whereas modes 2 and modes 3 occur only in the forward power flow, and modes 2B and modes 3B exist in the reverse power transfer [23].…”

Section: Tps Modulationmentioning

confidence: 99%

An improved closed loop hybrid phase shift controller for dual active bridge converter

Narasimha¹,

Salkuti

2020

IJECE

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In this paper, a new closed loop hybrid phase shift control is proposed for dual active bridge (DAB) converter with variable input voltage. The extended phase shift (EPS) control is applied when load gets heavy enough and the secondary side phase shift angle decreases to zero. When this modified DAB converter operates at light loads, the triple phase shift (TPS) modulation method is applied, and the added control freedom is the secondary phase shift angle between the two-secondary side switching legs. The hybrid phase shift control (HPS) scheme is a combination of EPS and TPS modulations, and it provides a very simple closed form implementation for the primary and secondary side phase shift angles. Depending on the application by changing the phase shift angles we can achieve Buck or Boost operation. A characteristic table feedback control method has been used for closed loop operation. By using 1D look up table the proposed DAB converter provides constant 400V for any given input voltage.

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“…Then, substituting (13) (14) into (17), the transmission power under proposed AMS can be described as:…”

Section: The Influence Of Proposed Ams Strategy On Mdct Performamentioning

confidence: 99%

“…To eliminate the adverse effects caused by HFL voltages mismatch phenomenon under varied operating conditions, the phase-shift strategies including extend-phase-shift (EPS), dual-phase-shift (DPS) and triple-phase-shift (TPS) reduce HFL reactive power by introducing internal phase-shift angles in HFL voltages [15]- [17]. However, the conventional phase-shift methods reduce HFL reactive power at the cost of decreasing transmission power capacity [18].…”

mentioning

confidence: 99%

Adaptive Modulation Strategy for Modular Multilevel High-Frequency DC Transformer in DC Distribution Networks

Wang

Fan

et al. 2020

IEEE Access

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The modular multilevel high-frequency DC transformer (MDCT) plays an important role in the bus connection, voltage conversion, power transmission and electrical isolation in the DC distribution networks. During practical operation, the mismatch between high-frequency-link (HFL) voltages and HFL transformer voltage ratio caused by the variation of DC bus voltages occurs, resulting in the increased reactive power, larger current stress and decreased efficiency in MDCT. To solve this problem, an adaptive modulation strategy (AMS) is proposed in this paper. The proposed AMS adjusts HFL voltages by varying the number of inserted sub-modules adaptively, ensuring the HFL voltages match HFL transformer voltage ratio. Compared with the conventional phase-shift strategies, the proposed strategy obtains higher transmission power capacity and HFL power factor, and it maintains the ideal efficiency of MDCT under light load situation. Besides, the proposed strategy avoids the optimal phase-shift angle calculation containing numerous parameters, reducing computing burden and improving practicality for MDCT. Moreover, the hybrid-wave modulation in proposed strategy makes HFL voltages compose of quasi-square-wave and square-wave, addressing the dv/dt stress problem and ensuring the higher DC voltage utilization and power transmission capability simultaneously. The mathematical model, operation principle and control architecture of proposed AMS are investigated, and the experimental results in a MDCT prototype verify the correctness and effectiveness of the analysis and proposed strategy.

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Triple Phase Shift Control of an LLL Tank Based Bidirectional Dual Active Bridge Converter

Cited by 83 publications

References 29 publications

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

Overview and Comparison of Modulation and Control Strategies for a Nonresonant Single-Phase Dual-Active-Bridge DC–DC Converter

An improved closed loop hybrid phase shift controller for dual active bridge converter

Adaptive Modulation Strategy for Modular Multilevel High-Frequency DC Transformer in DC Distribution Networks

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