Decentralized Suppression Strategy of Circulating Currents Among IPOP Single-Phase DC/AC Converters

Xia, Yanghong; Yu, Miao; Zhang, Yong; Lv, Zhonghua; Wei, Wei

doi:10.1109/jestpe.2019.2906653

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…However, with the extensive integration of renewable generation equipment and diversified loads, single-stage equipment cannot meet the higher needs of control operations. On the one hand, the direct connection between the AC and the DC microgrids using a single-stage converter may introduce a circulating current, which requires an additional suppression strategy (Xia et al, 2018;Xia et al, 2020). On the other hand, the standard of the DC voltage level is not mature, the renewable generations and loads have various voltage levels, and single-stage converters often have specific requirements on DC voltage according to their modulation modes.…”

Section: Introductionmentioning

confidence: 99%

A unified decentralized framework for isolated interlinking converters of hybrid DC/AC microgrids

Yang²,

Peng³

et al. 2023

Front. Energy Res.

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Due to the advantages of effectively integrating diversified loads and renewable sources, hybrid DC/AC microgrids have attracted the common attention of industry and academia. Meanwhile, with the increasing number of power electronic devices connected to the system, the complexity of the system increases, which puts forward higher requirements for galvanic isolation and intelligent control methods. This study proposes a unified decentralized framework for isolated interlinking converters (IICs) in hybrid DC/AC microgrids, which include topology and a control strategy to solve the aforementioned problems. Firstly, in terms of topology, a dual active bridge (DAB) converter is adopted to realize galvanic isolation and DC voltage conversion, which can facilitate the interconnection of DC microgrids or be combined with VSC for the interconnection of DC and AC microgrids. Secondly, in terms of the control strategy, a bidirectional voltage–supporting control strategy is proposed for IICs, in which the frequency and voltage are adopted as the indications to balance the power and strengthen the inertia interaction of microgrids. Furthermore, with the proposed control strategy, the voltage sources of different microgrids can share the power fluctuation, cooperatively. The stability of the proposed strategy is analyzed, and the effectiveness is verified by several HIL experiments.

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Section: Introductionmentioning

confidence: 99%

A unified decentralized framework for isolated interlinking converters of hybrid DC/AC microgrids

Yang²,

Peng³

et al. 2023

Front. Energy Res.

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“…And droop control is a classical strategy for AC/DC converters, which have advantages in coordinating multiple units in an autonomous way without communication links. Therefore, several novel droop-control-based methods present significant effect on steady-state problems in hybrid AC/DC microgrid, for instance voltage support [4], accurate current sharing [5], circulating currents suppression [6], subgrids interaction [7], storage SOC equalisation [8], generation-storage coordination [9], etc. Nevertheless, the transient processes of the hybrid AC/DC microgrid tend to be neglected while adopting these abovementioned modified droop-control-based methods, which will affect the stable operation of the system.…”

Section: Introductionmentioning

confidence: 99%

Adjustable inertia implemented by bidirectional power converter in hybrid AC/DC microgrid

Zhang

Xia

et al. 2020

IET Generation, Transmission & Distribution

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“…Among the applications, this single-phase to threephase converter can be highlighted by electric drive machines, generator systems, and electric railway tractions. In addition to the applications already mentioned above, single-phase parallel converters are widely used in uninterruptible power supply systems, power factor correction, and photovoltaic generation systems [8], [13].…”

mentioning

confidence: 99%

Predictive Control for a Single-Phase to Three-Phase Converter with Two-Parallel Single-Phase Rectifiers

Ferreira,

Dias,

Rocha

et al. 2023

Eletrônica de Potência

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This paper presents a parallel single-phase to three-phase drive system, using two single-phase rectifiers. The rectifiers are not isolated from the grid by low-frequency transformers, so the reduction of the circulation current is an important objective for the control strategy. Modulated Model Predictive Control regulates the grid current and minimizes the circulation current between the parallel rectifiers. Furthermore, the analyzed predictive control consists of two strategies, where the first has the application of two vectors in a sampling period while the second has three vectors. The addition of a vector allows the reduction of the computational cost due to the reduction of tests performed in the predictive control and reduces the harmonic distortion in the electrical grid due to the greater application of vectors in a sampling period. Simulation and experimental results are presented in order to validate the control strategy.

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Decentralized Suppression Strategy of Circulating Currents Among IPOP Single-Phase DC/AC Converters

Cited by 7 publications

References 26 publications

A unified decentralized framework for isolated interlinking converters of hybrid DC/AC microgrids

A unified decentralized framework for isolated interlinking converters of hybrid DC/AC microgrids

Adjustable inertia implemented by bidirectional power converter in hybrid AC/DC microgrid

Predictive Control for a Single-Phase to Three-Phase Converter with Two-Parallel Single-Phase Rectifiers

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