Design, Control and Stability Analysis of an Interleaved Dc Converter for Voltage Interfacing Application in Microgrids

Tricarico, Thiago; Soares, Matheus; Gontijo, Gustavo; Oliveira, Diego de S. de; Dicler, Felipe; Aredes, Maurício

doi:10.20906/cps/cba2018-0146

Cited by 3 publications

(11 citation statements)

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“…Some of the ideas expressed in this paper were first introduced by the authors in [37]. However, in the present paper, a more detailed explanation on the system modeling and a deeper stability analysis are developed proving the enhancement on the converter disturbance rejection capability.…”

Section: Introductionmentioning

confidence: 94%

Control Design, Stability Analysis and Experimental Validation of New Application of an Interleaved Converter Operating as a Power Interface in Hybrid Microgrids

et al. 2019

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This paper presents a new and specific use of a bidirectional interleaved converter to perform a power interface in hybrid microgrids. The converter is responsible for regulating the power flow between the direct-current (DC) microgrid and the rest of the hybrid microgrid by controlling the DC microgrid voltage. The authors present a detailed modeling of the mentioned system in order to develop the system control design and a stability analysis. In addition, the authors propose a new control design strategy aiming at improving the voltage control disturbance rejection characteristic, while maintaining a good dynamic behavior regarding the reference tracking functionality. In this hybrid microgrid topology, a back-to-back converter connects the main grid to the AC microgrid. The main objective of this converter is to provide a high-power-quality voltage to critical and sensitive loads connected to the microgrid. The interleaved converter adjusts the DC microgrid voltage according to the operational voltage of the back-to-back converter DC link. In the DC microgrid case, the variation of load and generation connection could lead to serious voltage sag and oscillations that could be harmful to the sensitive loads. The voltage controller must be capable of rejecting these disturbances in order to maintain a high-power-quality voltage. Furthermore, experimental results are provided in order to validate this specific application of the interleaved converter and the presented control design strategy.

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Section: Introductionmentioning

confidence: 94%

Control Design, Stability Analysis and Experimental Validation of New Application of an Interleaved Converter Operating as a Power Interface in Hybrid Microgrids

et al. 2019

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“…This system uses a back-to-back converter to perform a PFI between the AC utility bus and the AC microgrid bus in such a way to obtain a high-power quality at the AC microgrid. This topology may require a power interface between the DC link of the back-to-back converter and the DC microgrid bus due to the difference in their voltage levels [15,16].…”

Section: Proposed Hybrid-microgrid Topologymentioning

confidence: 99%

“…In [15,16], the first and the second control objectives were deeply studied with the system operating in the grid-connected mode. However, the operation of the system in islanded mode, and the proper control law to enable it, have not been discussed.…”

Section: Interleaved Converter Modellingmentioning

confidence: 99%

“…In [15], it is proposed a current-control tuning technique, (29) and (30), based on the Gao's method [29], in order to achieve a desired closed-loop bandwidth (ω c ).…”

Section: Interleaved Converter Modellingmentioning

confidence: 99%

“…This characteristic leads to a reduction of the output capacitance resulting in a lighter solution. One of the concerns related to this converter is the possibility of the occurrence of phase-current imbalance, which can be solved by using a proper control strategy [15,16].…”

Section: Introductionmentioning

confidence: 99%

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New hybrid‐microgrid topology using a bidirectional interleaved converter as a robust power interface operating in grid‐connected and islanded modes

Tricarico

Gontijo

Aredes

et al. 2019

IET Renewable Power Generation

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This study presents a new microgrid topology that uses a bidirectional interleaved converter performing a power interface between DC buses in a hybrid microgrid allowing for both grid-connected and islanded modes. The authors propose a new control strategy and controllers' design method aiming at achieving a high-performance dynamic response regarding the converter load and generation disturbance rejection capability. In the grid-connected mode, the interleaved converter operates in the buck mode providing a high-power-quality DC microgrid voltage. In the islanded mode, the interleaved converter operates in the boost mode and it is responsible for regulating the DC link of the back-to-back converter that connects the main grid to the AC microgrid. A detailed mathematical model is presented to obtain a MIMO system that takes into account the system's disturbances to analyze both stability margins and disturbance-rejection response. Simulations of the proposed topology are carried out in PSCAD/EMTDC in a microgrid operating in grid-connected and islanded operation modes. Experimental results are provided in order to validate the proposed control tuning method.

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Recent Contributions, Future Prospects and Limitations of Interlinking Converter Control in Hybrid AC/DC Microgrids

et al. 2021

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This work analyzes interlinking converter control in hybrid AC/DC microgrids. The paper addresses the state-of-the-art general hybrid microgrid structure. The key power electronics topologies are used as bidirectional interface converters in the AC and DC parts. Different control structures of hybrid microgrids are categorized, followed by the classification of the main control functions, their control strategies, and the control techniques and a summary of their positive and negative aspects and applications. Control functions, their strategies and techniques are classified in the interlinking-converter based. Finally, overall control objectives, time-scaled control structures, and their strategies are outlined. The prospects, main challenges, research gaps, and the trend of the hybrid microgrid structure and control are reviewed and summarized in the conclusions.

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Design, Control and Stability Analysis of an Interleaved Dc Converter for Voltage Interfacing Application in Microgrids

Cited by 3 publications

References 0 publications

Control Design, Stability Analysis and Experimental Validation of New Application of an Interleaved Converter Operating as a Power Interface in Hybrid Microgrids

Control Design, Stability Analysis and Experimental Validation of New Application of an Interleaved Converter Operating as a Power Interface in Hybrid Microgrids

New hybrid‐microgrid topology using a bidirectional interleaved converter as a robust power interface operating in grid‐connected and islanded modes

Recent Contributions, Future Prospects and Limitations of Interlinking Converter Control in Hybrid AC/DC Microgrids

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