Topology Analysis and Review of Three-Port DC–DC Converters

Wang, Zhiqing; Luo, Quanming; Wei, Yuqi; Mou, Di; Lu, Xiuyuan; Sun, Pengju

doi:10.1109/tpel.2020.2985287

Cited by 135 publications

(26 citation statements)

References 97 publications

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“…To make the buck converter model more precise, many parameters have been added to the basic transfer function as in [34]. After substituting all components values in the transfer function as in ( 8) & ( 9), Matlab is used to find the Z-transform of the transfer function using zero-order hold (ZOH) model as in (10). Then, the margin stability bode plot and root locus tools are used to find the controller transfer function as in (11) and the step response of the closed-loop system where K a =k p andK b =k i T s -k p as shown in Fig.…”

Section: Control Structure and Mode Selectionmentioning

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: Control Structure and Mode Selectionmentioning

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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“…There are many ways of deriving the TPCs' configuration, as explained previously in [15][16][17][18]24]. In [15], a systematic analytical technique for different configurations is constructed based on the power flow graph tool.…”

Section: A Review Of Three-port Configurationsmentioning

confidence: 99%

“…The extension of this work with different buck, boost, and buck-boost converters is presented [16,17]. In [18], a comprehensive topological study and comparison of five different structures of three-port DC/DC converters are presented. However, some TPCs cannot be derived based on these five structures as in [19,20], where some ports share components.…”

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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“…In HESs, by increasing the number of input sources, several converters must be utilized in order to transfer power from each source to the load, which leads to an increase in the cost of the system. Instead of using multiple separate converters, a multi-input converter (MIC) can be used such that some different converters exist in a system are integrated together in order to reduce the number of components [3][4][5]. Similar to other dc-dc converters, the multi-input converters are divided into two categories; isolated [6][7][8][9][10] and non-isolated converters [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

et al. 2021

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In this paper, a new high efficiency soft-switching non-isolated three-port converter (TPC) is proposed. In the conventional TPC, three switches are required to process power in different directions between inputs and output. Providing soft-switching condition for all switches using a low number of auxiliary components is a challenging task. In this paper, the conventional TPC topology is modified by changing its structure and adding a simple auxiliary circuit such that all switches operate under soft-switching condition in all operating modes. To reduce the volume of the converter, the magnetic components are integrated using a coupled inductor in the auxiliary soft-switching cell. In this paper, various converter operating modes are presented, and design considerations are discussed. Finally, a prototype 200 W, 100 V converter is implemented in the laboratory, and the theoretical analysis is validated by the experimental results.INDEX TERMS Distributed energy systems, dc-dc converters, soft-switching, hybrid power system, multi-input converter.

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Topology Analysis and Review of Three-Port DC–DC Converters

Cited by 135 publications

References 97 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

Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

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