Hardware Decoupling and Autonomous Control of Series-Resonance-Based Three-Port Converters in DC Microgrids

Wang, Panbao; Liu, Xiaonan; Wang, Wei; Xu, Dianguo

doi:10.1109/tia.2019.2906112

Cited by 40 publications

(14 citation statements)

References 31 publications

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“…Therefore, it is not suitable for applications requiring fast control and high efficiency. [18] proposes adding a capacitor in series with the leakage inductance to ensure low impedance port resulting in hardware decoupling. However, the approach uses an extra power device which reduces efficiency and limits applicability at high power solutions.…”

Section: One Less Inductormentioning

confidence: 99%

“…Thus, they inhibit the scalability of the number of ports in MAB converters and reduces their applicability. [18] proposes a hardware decoupling approach by adding a capacitor to create a series resonant port in the multiport converter. However, the approach uses an additional passive power device which results in higher losses and results in lower efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Multiactive Bridge Converter With Inherently Decoupled Power Flows

Bandyopadhyay

Purgat

Qin

et al. 2021

IEEE Trans. Power Electron.

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Multi-active bridge converters (MAB) have become a widely-researched candidate for the integration of multiple renewable sources, storage and loads for a variety of applications, from robust smart grids to more-electric aircraft. Connecting multiple dc ports reduces power conversion stress, improves efficiency, reduces material billing and increases power density. However, the power flows between the ports of a MAB converter are magnetically coupled via the high-frequency (HF) transformer, making it difficult to control. This paper presents a MAB converter configuration with a rigid voltage source on the magnetizing inductance of the transformer resulting in inherently decoupled power flows. As a result, the configuration allows independent power flow control tuning of the rest of the ports. The theory behind the power flow decoupling of the proposed MAB configuration is analyzed in detail using a reduced-order model. A 2-kW, 100 kHz Si-C based four-port MAB converter laboratory prototype is built and tested, showing completely decoupled control loops with fast transient response regardless of their control bandwidths. The proposed configuration therefore makes the operation and design of the MAB family of converters much more feasible for any number of ports and precludes the need for a high-performance dynamic decoupling controller.Index Terms-DC-DC converter, decoupled power flow management, multi-active-bridge converter, multiwinding transformer.

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Section: One Less Inductormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Multiactive Bridge Converter With Inherently Decoupled Power Flows

Bandyopadhyay

Purgat

Qin

et al. 2021

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…In addition, the current stress will increase when the resonant frequency is different from the switching frequency. In [19], an isolated three-port converter is proposed. The decoupling resonant tank is added to the battery port, which 2 of 17 results in the power flow between the PV port and dc-bus port being transferred indirectly via the battery port.…”

Section: Introductionmentioning

confidence: 99%

TAB Series-Resonant DC-DC Converter and Multi-Phase-Shift Based Global Optimization Modulation

Wang

2022

Applied Sciences

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In this paper, a triple-active-bridge resonant dc-dc converter with the ability of topology-level power decoupling is proposed. The power coupling between the two dc ports is eliminated by adding a resonant capacitor to the common port. The operation principle and the steady-state power characteristics are analyzed. On this basis, a multi-phase-shift-based global optimization modulation is proposed to minimize the RMS values of the transformer currents in the entire power and voltage range, thus increasing the global efficiency. An experimental prototype is built to verify the correctness and availability of the proposed power decoupling topology and optimized modulation.

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“…A class of TPCs based on the single inductor and their control methods have been proposed to achieve maximum energy harvesting of PV module in literature, 24,25 which lack investigation on the design of various interacting control loops. An energy management method based on multiple control loops has been widely studied and applied in literature, 26–29 where autonomous and smooth mode transition is employed with minimum function competition. However, the design of the controllers is very complicated due to serious cross‐regulation.…”

Section: Introductionmentioning

confidence: 99%

Analysis, control, and modeling of the three‐port converter without port voltage constraint for photovoltaic/battery system application

Tian

Zhou

Leng

et al. 2021

Circuit Theory & Apps

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For a photovoltaic (PV)/battery power system consisting of PV module, energy storage system, and local load, using a three‐port converter (TPC) instead of several single‐input converters is more desirable, such as simpler circuit, higher efficiency, lower cost, and centralized control without communication circuit. In this paper, a TPC is proposed and analyzed, which includes operating modes, steady‐state performance, and parameter design. Compared with other converters, the proposed TPC has a low cost, compact structure, and a more flexible voltage relationship among all ports. Moreover, energy management and control methods are further proposed for PV/battery systems based on the proposed converter, which can achieve maximum power point tracking (MPPT) of PV module and constant output voltage. In order to design the control loop and realize multivariable optimal control, a small‐signal model of the converter is obtained in each operation mode. Then a detailed decoupling design approach based on a small‐signal model is provided to allow a separate controller design for the proposed converter. Finally, the validity of the proposed converter and its energy management and control method are verified by experimental results.

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Hardware Decoupling and Autonomous Control of Series-Resonance-Based Three-Port Converters in DC Microgrids

Cited by 40 publications

References 31 publications

A Multiactive Bridge Converter With Inherently Decoupled Power Flows

A Multiactive Bridge Converter With Inherently Decoupled Power Flows

TAB Series-Resonant DC-DC Converter and Multi-Phase-Shift Based Global Optimization Modulation

Analysis, control, and modeling of the three‐port converter without port voltage constraint for photovoltaic/battery system application

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