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Control and Stability of Grid-Connected Power Electronic Converters

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 8406

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Special Issue Editors

Prof. Dr. Antonello Monti

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Guest Editor

E.ON Energy Research Center, RWTH Aachen University, 52074 Aachen, Germany
Interests: power system dynamics, grid automation; real-time simulation; cloud applications for energy
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Subham Sahoo

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Guest Editor

Department of Energy, Aalborg University, 9220 Aalborg, Denmark
Interests: microgrids; renewable energy; power electronics

Special Issue Information

Dear Colleagues,

The large-scale development of renewable energy sources will inevitably lead to significant changes in the power system, that is, a transition from a synchronous generator-based power system to a low-inertial power electronic converter-based system. This transition will also bring a series of emerging problems regarding the control and stability of grid connected power electronic converters. Hence, this Special Issue aims to disseminate information on recent scientific advances, developments, and pilot studies on the control and stability of grid-following/grid-forming converters where we invite researchers and industry experts to contribute research papers and review articles on the state of the art and future directions in this industry.

Prof. Dr. Antonello Monti
Prof. Dr. Subham Sahoo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

renewable energy
power system
grid connected power electronic converters
power converters

Published Papers (4 papers)

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Research

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23 pages, 12710 KiB

Open AccessArticle

Bidirectional Power Control for a Three-Phase Grid-Connected Inverter under Unbalanced Grid Conditions Using a Proportional-Resonant and a Modified Time-Domain Symmetrical Components Extraction Method

by Mohammad Alathamneh, Haneen Ghanayem and R. M. Nelms

Energies 2022, 15(24), 9564; https://0-doi-org.brum.beds.ac.uk/10.3390/en15249564 - 16 Dec 2022

Cited by 2 | Viewed by 1012

Abstract

Discussed in this study is a bidirectional power control technique for a three-phase grid connected inverter under different unbalanced grid conditions. Prior researchers have focused on either solving the unbalanced problem or controlling the power. However, this paper addresses both issues: solving the unbalanced problems of the point-of-common-coupling (PCC) voltages and grid currents, and reducing the large ripple in the real and reactive power while also applying a bidirectional power control under weak grid conditions. A phase-locked loop (PLL) is not required because a simpler PR controller was employed. A symmetrical components extraction method was used. Compared to previous symmetrical component techniques that used complicated transformations, this approach requires less computations. Since the unbalanced load issue has been resolved, other loads connected to the grid will not be impacted. MATLAB Simulink was used in simulation experiments, and a real-time interface platform dSPACE DS1202 was used to verify the proposed control method efficacy experimentally. Full article

(This article belongs to the Special Issue Control and Stability of Grid-Connected Power Electronic Converters)

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17 pages, 6680 KiB

Open AccessArticle

Three-Phase Grid-Connected Inverter Power Control under Unbalanced Grid Conditions Using a Proportional-Resonant Control Method

by Mohammad Alathamneh, Haneen Ghanayem, Xingyu Yang and R. M. Nelms

Energies 2022, 15(19), 7051; https://0-doi-org.brum.beds.ac.uk/10.3390/en15197051 - 26 Sep 2022

Cited by 7 | Viewed by 1695

Abstract

Proposed in this article is bidirectional real and reactive power control of a three-phase grid-connected inverter under unbalanced grid conditions using a proportional-resonance controller. Different unbalanced grid conditions have been studied, such as unbalanced three-phase load and unbalanced grid impedance. These unbalanced scenarios generate unbalanced grid currents and unbalanced point-of-common-coupling (PCC) voltages, causing large oscillations in both real and reactive power transferred to the grid. The purposes of the suggested technique are to balance the grid currents and point-of-common-coupling voltages as well as control the power injected into the grid. As a result, balanced PCC voltages are guaranteed, the oscillation in real and reactive power is reduced, and power control is achieved. The proposed method’s performance has been verified in MATLAB/SIMULINK simulation software, and different experimental results have been obtained using a real-time interface platform, dSPACE DS1202. Full article

(This article belongs to the Special Issue Control and Stability of Grid-Connected Power Electronic Converters)

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19 pages, 2955 KiB

Open AccessArticle

Dual-Active-Bridge Model and Control for Supporting Fast Synthetic Inertial Action

by Stefania Cuoghi, Riccardo Mandrioli, Lohith Kumar Pittala, Vincenzo Cirimele and Mattia Ricco

Energies 2022, 15(6), 2295; https://0-doi-org.brum.beds.ac.uk/10.3390/en15062295 - 21 Mar 2022

Cited by 3 | Viewed by 2835

Abstract

This article proposes a dual-active-bridge control to support the fast synthetic inertial action in DC microgrids. First of all, the selection of the isolated DC/DC converter to link an energy storage system with the DC bus in a microgrid is analyzed and the advantages of the dual-active-bridge converter controlled by a single-phase shift modulation justify its selection. An active front-end can be then adapted to connect the DC bus with an AC grid. Secondly, this paper presents the design of a discrete PI controller for supporting fast synthetic inertial action. In particular, a discrete dual-active-bridge model based on the transferred power between both converter bridges, which overcomes the approximations of the output current linearization model, is proposed. Moreover, the article introduces a novel equation set to directly and dynamically tune discrete PI parameters to fulfill the design frequency specifications based on the inversion formulae method. In this way, during the voltage/power transients on the DC bus, the controller actively responds and recovers those transients within a grid fundamental cycle. Since the developed set of control equations is very simple, it can be easily implemented by a discrete control algorithm, avoiding the use of offline trial and error procedures which may lead to system instability under large load variations. Finally, the proposed control system is evaluated and validated in PLECS simulations and hardware-in-the-loop tests. Full article

(This article belongs to the Special Issue Control and Stability of Grid-Connected Power Electronic Converters)

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Review

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52 pages, 5147 KiB

Open AccessFeature PaperReview

Review of Modern Control Technologies for Voltage Regulation in DC/DC Converters of DC Microgrids

by Asimenia Korompili and Antonello Monti

Energies 2023, 16(12), 4563; https://0-doi-org.brum.beds.ac.uk/10.3390/en16124563 - 07 Jun 2023

Cited by 5 | Viewed by 2191

Abstract

This paper provides an overview of modern feedback control methods for the voltage regulation in DC/DC converters of DC microgrids. Control objectives and practical restrictions are defined and used as indicators for the analysis and performance assessment of the control methods. After presenting the concept of each control method, the advantages and limitations in the converter applications are discussed. The main conclusions of this overview can be used as recommendations for the selection of the suitable control method according to the control requirements in the DC microgrid. The low robustness against disturbances is a major issue in all control methods. For the enhancement of the robustness of the feedback control methods, three approaches are reviewed. Applications of these approaches in DC/DC converters are compared with regard to the achieved disturbance rejection and the related cost of nominal performance degradation. The disturbance/uncertainty estimation and attenuation (DUEA) framework appears to be the most promising approach to compromising these opposing control objectives. This overview is presented for a general DC/DC converter, without any additional control design requirement imposed by a specific converter plant. This allows the generalisation of the conclusions of the performance assessment, which can facilitate the application of the control methods in similar systems, such as in AC/DC converters or motor drives. Full article

(This article belongs to the Special Issue Control and Stability of Grid-Connected Power Electronic Converters)

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