A Three-Level Three-port Bidirectional DC-DC Converter

Ganjavi, Amir; Ghoreishy, Hoda; Ahmad, Ahmad Ale; Zhagn, Zhe

doi:10.1109/peac.2018.8590338

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…Three-port power converters (TPCs) are widely employed in various applications such as electric vehicles [1]- [3], photovoltaic hybrid systems [4], and fuel-cell hybrid power systems [5]. Three-port converters may consist of a unidirectional port such as PV source or a bi-directional port such as battery [6]- [8]. Therefore, the arrangement of converters and controller for the power flow distribution in a TPC plays a vital role on the overall performance and efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Method of Seamless Transitions Between Different Operating Modes for Three-Port DC-DC Converters

Aljarajreh

Siwakoti

et al. 2021

IEEE Access

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This paper presents the design of three-port converters (TPCs) for smooth transitions (i.e., fast settling time, and no obvious overshoot/undershoot) of 7 distinctive operating modes, depending on sources and loads scheduling. Two viable converter configurations have been identified and selected for further analysis and design of PV-battery systems. Conventionally, mode transition is achieved by assigning specific switching patterns through feedback signals and appropriate control algorithms. This incurs a delay in the response and unavoidable noise in the circuit. Additionally, in TPCs, three voltage sensors and three current sensors are generally required for decision making in mode selection, where errors in sensors may lead to an inaccurate response. This paper presents a new control strategy where the number of switching patterns is significantly reduced to 3 patterns instead of minimum 5 patterns for existing reported topologies. Therefore, decisions are simplified so that the transition occurs naturally based on the power availability and load demand but not deliberately as in the conventional method. In addition, instead of six sensors, three voltage sensors and only one current sensor are required to achieve all the necessary operations, namely, MPPT, battery protection, and output regulation. Moreover, these sensors do not participate in mode selection decision, which leads to seamless and fast mode transition. In addition, this work considers two bidirectional ports as compared with only one bidirectional port in most reported topologies. This configuration enables both standalone and DC grid-connected applications. Experimental results are reported to verify the proposed solution.INDEX TERMS Auto-transition, battery, bidirectional converter, mode selection, photovoltaic system and three-port converter.

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Section: Introductionmentioning

confidence: 99%

A Method of Seamless Transitions Between Different Operating Modes for Three-Port DC-DC Converters

Aljarajreh

Siwakoti

et al. 2021

IEEE Access

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“…Consequently, different topologies of possible three-port converters should be available to cater for various types of input sources and load ports [9][10][11][12]. These ports could be a unidirectional port, such as a PV energy source, or a bidirectional port, such as battery or DC bus [13,14]. Therefore, the arrangement of converters and controlling the power flow distribution of the TPCs plays a vital role on the overall performance and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Analysis of Three-Port DC/DC Converters with Two Bidirectional Ports Based on Power Flow Graph Technique

Aljarajreh

Siwakoti

et al. 2021

Energies

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This paper presents a systematic topological study to derive all possible basic and non-isolated three-port converters (TPCs) using power flow diagrams. Unlike most reported TPCs with one bidirectional port, this paper considers up to two bidirectional ports and provides a comprehensive analytical tool. This tool acts as a framework for all power flow combinations, selection, and design. Some viable converter configurations have been identified and selected for further analysis.

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“…Consequently, multilevel dc-dc converters (MLCs) are suggested as an effective solution to reduce the voltage stress on semiconductor devices, increase efficiency, and reduce the size of passive components [19][20][21][22][23]. Among several reported topologies, single-input dual-output three-level dc-dc converter (SIDO-TLC) combines advantages of MPC and MLC, making it a promising topology for high voltage applications [24,25]. In SIDO-TLC, the voltage stress across all power switches and diodes is reduced to only half of the boost output voltage, while simultaneously passive components size is shrunken and efficiency is increased.…”

Section: Introductionmentioning

confidence: 99%

Feedback–feedforward control technique with a comprehensive mathematical analysis for single‐input dual‐output three‐level dc–dc converter

Ganjavi¹,

Gholinejad

Mehrasa³

et al. 2020

IET power electron.

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This study proposes a control technique for single-input dual-output three-level dc-dc converter (SIDO-TLC) using feedback (FB) and feedforward (FF) principles. Through the proposed control strategy, SIDO-TLC can smoothly function in both buck and boost operating conditions with a fast dynamic. Major duties of the designed FB control loops are to noticeably decrease the recovery time of transient responses under the load variations and accurately balance the boost capacitors voltages. To effectively decouple the introduced control inputs, an external FF controller is assigned that can also enhance the buck and boost voltage regulations. Furthermore, a step-by-step assessment is contemplated based on the proposed control loops to make an offline adjustment for the FB and FF coefficients. The proposed controller implemented on SIDO-TLC is highly suitable for portable applications, where efficiency, cost, and speed are of important factors. The simulation results and the laboratory test setup of SIDO-TLC using DSP TMS320F28335 are presented to prove the validity of the presented theoretical subjects.

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A Three-Level Three-port Bidirectional DC-DC Converter

Cited by 10 publications

References 6 publications

A Method of Seamless Transitions Between Different Operating Modes for Three-Port DC-DC Converters

A Method of Seamless Transitions Between Different Operating Modes for Three-Port DC-DC Converters

Synthesis and Analysis of Three-Port DC/DC Converters with Two Bidirectional Ports Based on Power Flow Graph Technique

Feedback–feedforward control technique with a comprehensive mathematical analysis for single‐input dual‐output three‐level dc–dc converter

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