A new DC-DC power converter derived from the TAB for bipolar DC microgrids

Mamede, Henrique R.; Santos, Walbermark M. dos; Martins, Denizar Cruz

doi:10.1109/ecce.2015.7310532

Cited by 18 publications

(6 citation statements)

References 10 publications

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“…The reason is, when V 1 in Equation ( 11) is multiplied with V 1 of Equation ( 8), there is no power transferred from port 1 to port 1 or it can also be represented as the phase angle between the same voltage V 1 is always zero. Hence, only the term containing V 2 can be seen in Equation (14). The second thing noticed from above equations is the values of equivalent leakage inductance.…”

Section: Calculation Of Equivalent Leakage Inductances In Delta Equiv...mentioning

confidence: 99%

“…13 However, DAB's single-input single-output (SISO) topology is insufficient for more complicated systems, such as the isolated multibattery charging systems mentioned earlier. 14 Connecting PV, grid, battery, or standalone PV, battery, and supercapacitor/fuel cell systems would require multiple DAB converters, which can increase the complexity of the system. 15 Additionally, controlling power flow in such a system becomes challenging, as good communication between all the converters is necessary to ensure proper operation.…”

Section: Introductionmentioning

confidence: 99%

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Simplified control of TAB converter for scalable multibattery charging system

Panchbhai,

Kumar

2024

Circuit Theory & Apps

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SummaryThe integration of distributed energy resources (DERs) into DC microgrids has become commonplace in many applications, including electric vehicle (EV) systems that use batteries, fuel cells, and supercapacitors as energy storage systems. To make a sustainable charging system for electric vehicles, DERs can be used in conjunction with the grid. In many cases, charging systems based on isolated DC‐DC converters, such as the dual active bridge (DAB) converter, with various controls, are typically used. However, integrating multiple DERs at the common input DC link can result in a loss of isolation in the DAB converter and also leads to problems with circulating current. To maintain isolation, multiple DAB converters can be used, but this increases the system's size. Alternatively, the multiport isolated DC‐DC converter can address such issues but introduces complexities such as cross‐coupling between power flow. This paper proposes a hardware decoupling control methodology for a triple active bridge (TAB) based isolated DC‐DC converter, with power routing features for simultaneously charging two EV's battery stack. Through hardware decoupling control, appropriate passive components are designed and selected to connect with the individual H‐bridges of the TAB for power decoupling. The paper discusses the cross‐coupling issue in the TAB and describes a methodology derived from mathematical expressions for achieving power decoupling. For validation of the control, a 5 kW system is modeled in MATLAB Simulink, and the results demonstrate how the proposed approach overcomes cross‐coupling issues. Further, a 500 W hardware prototype has been developed to validate the proposed approach.

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Section: Calculation Of Equivalent Leakage Inductances In Delta Equiv...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simplified control of TAB converter for scalable multibattery charging system

Panchbhai,

Kumar

2024

Circuit Theory & Apps

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“…The system flexibility gets enhanced by the introduction of various PECs, as voltage regulation and control become much easier [54], [55]. Based on this, various configurations such as transformer-enabled DC networks [56] - [58], bipolar networks [59], [60], and DC grids with redundant bus structures [61], have been proposed. The classification of DC microgrid architectures is portrayed in Fig.…”

Section: DC Microgrid Architecturesmentioning

confidence: 99%

A Review on Challenges in DC Microgrid Planning and Implementation

Jithin,

Purayil Haridev,

Mayadevi

et al. 2023

Journal of Modern Power Systems and Clean Energy

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DC microgrids are gaining more attention with the increased penetration of various DC sources such as solar photovoltaic systems, fuel cells, batteries, etc., and DC loads. Due to the rapid integration of these components into the existing power system, the importance of DC microgrids has reached a salient point. Compared with conventional AC systems, DC systems are free from synchronization issues, reactive power control, frequency control, etc., and are more reliable and efficient. However, many challenges need to be addressed for utilizing DC power to its full potential. The absence of natural current zero is a significant issue in protecting DC systems. In addition, the stability of the DC microgrid, which relies on inertia, needs to be considered during system design. Moreover, power quality and communication issues are also significant challenges in DC microgrids. This paper presents a review of various value streams of DC microgrids including architectures, protection schemes, power quality, inertia, communication, and economic operation. In addition, comparisons between different microgrid configurations, the state-of-the-art projects of DC microgrid, and future trends are also set forth for further studies.

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“…The phase-shift angle is obtained by comparing the measured DC voltage with a reference signal, thus generating an error applied to a proportional-integral (PI) controller. The controller output signal is converted into an angle by means of the gyrator based on [28] and [29].…”

Section: Control Systemmentioning

confidence: 99%

An AC–DC Isolated MMC-Based Structure Suitable for MV SST Traction Applications

Pacheco¹,

Honório

Oliveira

2019

IEEE Access

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This paper presents the theoretical study and experimental validation of a single-stage bidirectional ac-dc topology for solid-state transformer (SST) applications. This topology is based on the modular multilevel converter (MMC) and employs the concepts of interleaving converters and integrated power stages. A single magnetic element operating at medium frequency is employed to perform galvanic isolation and coupling between the grid-side and load-side converters. The main characteristics of the structure are derived from the aforementioned characteristics, such as passive elements operating with an effective frequency higher than the switching frequency, minimized current ripples at high frequency, as well as reduced volume and weight. Experimental results of the converter are obtained in a small-scale prototype, operating with a switching frequency of 5 kHz, nominal power of 1.5 kW, output voltage of 300 V, and the supply voltage of 165 V at a frequency of 60 Hz. High-power factor of 0.99, low-harmonic distortion of the input current with 3.6%, and efficiency in the 87% were achieved. INDEX TERMS Bidirectional AC-DC converter, modular multilevel converter, power factor correction, medium-frequency isolation, single-stage topologies.

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A new DC-DC power converter derived from the TAB for bipolar DC microgrids

Cited by 18 publications

References 10 publications

Simplified control of TAB converter for scalable multibattery charging system

Simplified control of TAB converter for scalable multibattery charging system

A Review on Challenges in DC Microgrid Planning and Implementation

An AC–DC Isolated MMC-Based Structure Suitable for MV SST Traction Applications

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