A Reconfigurable Three-Port DC–DC Converter for Integrated PV-Battery System

Al-Soeidat, Mohammad; Aljarajreh, Hamzeh; Khawaldeh, Habes Ali; Lu, Dylan Dah-Chuan; Zhu, Jun

doi:10.1109/jestpe.2019.2941595

Cited by 61 publications

(17 citation statements)

References 27 publications

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“…And, as an example, the maximum power point tracking of the photovoltaic panels is described in the algorithm flow chart of this section. In [16,20,[25][26][27][28][29], the control system details of the multi-input converters are investigated comprehensively.…”

Section: Operating Modes Selection Algorithmmentioning

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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Section: Operating Modes Selection Algorithmmentioning

confidence: 99%

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

et al. 2021

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“…When switches S 1 , S 2 , and S d are simultaneously turned ON, the state-space matrices are obtained as (35). When switches S 1 , S 2 , and S d are simultaneously turned OFF, the state-space matrices are obtained as (36). When switches S 1 , S 2 are turned 0 0 0 0 0 0…”

Section: Mode-3 (Pv To Battery and Load)mentioning

confidence: 99%

Non-Isolated High-Gain Triple Port DC–DC Buck-Boost Converter With Positive Output Voltage for Photovoltaic Applications

et al. 2020

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The solar PV based power generation systems are growing faster due to the depletion of fossil fuels and environmental concerns. Combining PV panels and energy buffers such as battery through multiport converter is one of the viable solutions to deal with the intermittency of PV power. The goal of this paper is to design and analyze the proposed triple port DC-DC buck-boost converter for high step-up/step-down applications. It has two unidirectional ports (port-1 and port-3) and one bi-directional port (port-2) for harnessing photovoltaic energy and charging the battery. At port-1, the combined structure of buck and buckboost converter is used with a particular arrangement of switches and inductors. The step-up/step-down voltage conversion ratio is higher than the conventional buck-boost converter, and the polarity of the output voltage is maintained positive. The battery is added at the bi-directional port, for the storage of energy through the bi-directional boost converter. The switches operate synchronously for most of the modes making the control strategy simple. The characteristics and modes of operation along with a switching strategy, are elaborated. Experimental results are presented which validate the agreement with the developed theoretical expectation.

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“…Most of the reported works aim to achieve Maximum Power Point Tracking (MPPT), battery voltage regulation and output voltage regulation. However, not all control objectives are achieved simultaneously [22], [23]. Although it is integrated and has single power processing feature for all ports, the control dimension is inevitably limited.…”

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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A Reconfigurable Three-Port DC–DC Converter for Integrated PV-Battery System

Cited by 61 publications

References 27 publications

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

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

Non-Isolated High-Gain Triple Port DC–DC Buck-Boost Converter With Positive Output Voltage for Photovoltaic Applications

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

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