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Energies
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Progress and Challenges in Grid-Connected Inverters and Converters
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Progress and Challenges in Grid-Connected Inverters and Converters

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

Deadline for manuscript submissions: 20 March 2025 | Viewed by 4174

Special Issue Editors

Dr. Can Wang

E-Mail Website
Guest Editor
School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Interests: high voltage direct current; converters; static synchronous compensators; distributed generation; renewable integration; micro-grid energy system
Special Issues, Collections and Topics in MDPI journals
Dr. Xuewei Pan

E-Mail Website
Guest Editor
School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Interests: distributed generation; renewable integration; micro-grid energy system; soft-switching methods and modulation techniques for high-frequency power conversion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Guest Editor is inviting submissions to a Special Issue of Energies in the subject area of “Progress and Challenges in Grid-Connected Inverters and Converters”. With the rapid growth of renewable power generation, grid-connected inverters and converters are playing an increasingly critical role in power and micro-grid systems. The conventional power system is evolving into a power electronics-enabled power system. Developments in power electronics-enabled power systems also create new challenges, such as novel power electronic topologies, modulation techniques, and the modeling and control of grid-connected inverters and converters. These emerging technologies will impose a critical effect on dynamic stability analysis, resilience and power equality enhancement of the grid-connected application.

This Special Issue will deal with novel power electronic topologies, modulation and control techniques, and different challenges in power electronics-enabled power systems, including microgrid systems, and so on. Particular topics of interest include, but are not limited to, the following:

  • Novel power electronic topologies of grid-connected applications;
  • Modulation techniques of grid-connected inverters and converters;
  • Modeling and control of grid-connected inverters and converters;
  • Dynamic stability analysis of grid-connected inverters and converters;
  • Approaches for resilience-enhanced optimal operation methods of the grid-connected applications;
  • Schemes for power quality enhancement of the grid-connected applications.

Dr. Can Wang
Dr. Xuewei Pan
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.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • novel power electronic topologies of grid-connected applications
  • modulation techniques of grid-connected inverters and converters
  • modeling and control of grid-connected inverters and converters
  • dynamic stability analysis
  • resilience enhancement
  • power quality enhancement

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Published Papers (4 papers)

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Research

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19 pages, 1464 KiB  
Article
Start-Up and Fault-Ride-Through Strategy for Offshore Wind Power via DRU-HVDC Transmission System
by Yiting Zhang, Wenjiang Zhu, Cheng Tang, Ni Liu, Sinan Li and Hong Wang
Energies 2024, 17(19), 4968; https://doi.org/10.3390/en17194968 - 4 Oct 2024
Viewed by 959
Abstract
The diode-rectifier unit (DRU)-based high-voltage direct current (HVDC) transmission system offers an economical solution for offshore wind power transmission. However, this approach requires offshore wind farms to establish a strong grid voltage. To meet this requirement while fulfilling the dynamic characteristics of the [...] Read more.
The diode-rectifier unit (DRU)-based high-voltage direct current (HVDC) transmission system offers an economical solution for offshore wind power transmission. However, this approach requires offshore wind farms to establish a strong grid voltage. To meet this requirement while fulfilling the dynamic characteristics of the DRU, this paper proposes an advanced grid-forming (GFM) control strategy for offshore wind turbines connected to DRU-HVDC. The strategy incorporates a P-U controller and a Q-ω controller based on reactive power synchronization. Furthermore, a novel virtual power-based pre-synchronization method and an adaptive virtual impedance technique are integrated into the proposed GFM control to improve system performance during wind turbine (WT) integration and low-voltage ride-through (LVRT) scenarios. The virtual power-based pre-synchronization method reduces voltage spikes during the integration of new wind turbines, while the adaptive virtual impedance technique effectively suppresses fault currents during low-voltage faults, enabling faster recovery. Simulation results validate the effectiveness of the proposed GFM control strategy, demonstrating improved start-up and LVRT performance through the pre-synchronization and adaptive virtual impedance methods. Full article
(This article belongs to the Special Issue Progress and Challenges in Grid-Connected Inverters and Converters)
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15 pages, 6140 KiB  
Article
DAB-Based Bidirectional Wireless Power Transfer System with LCC-S Compensation Network under Grid-Connected Application
by Guocun Li, Zhouchi Cai, Chen Feng, Zeyu Sun and Xuewei Pan
Energies 2024, 17(17), 4519; https://doi.org/10.3390/en17174519 - 9 Sep 2024
Viewed by 915
Abstract
To realize two-way power transfer without physical connections under a grid-connected application, bidirectional wireless power transfer (BDWPT) is introduced. This paper proposes an LCC-S compensated BDWPT system based on dual-active-bridge (DAB) topology with the minimum component counts. LCC-S is designed to [...] Read more.
To realize two-way power transfer without physical connections under a grid-connected application, bidirectional wireless power transfer (BDWPT) is introduced. This paper proposes an LCC-S compensated BDWPT system based on dual-active-bridge (DAB) topology with the minimum component counts. LCC-S is designed to be a constant voltage (CV) network. To obtain the power transmission characteristics of the system, a mathematical model based on the fundamental harmonic approximation (FHA) method is established, and the result shows that the direction and amount of transfer power can be controlled by changing the magnitude of output voltages of either/both side of H-bridges. The reactive power of the system can be controlled to be zero when the output voltages of two H-bridges are in the same phase. Compared with DAB-based BDWPT systems with constant current (CC) compensation networks, the proposed structure has better transfer power regulation capability and easier control of the direction of power flow. A 1.1 kW experimental prototype is built in the laboratory to verify the characteristics of the proposed system. The results indicate that the power transfer characteristics of the proposed BDWPT system match its mathematical derivation results based on the FHA model. Full article
(This article belongs to the Special Issue Progress and Challenges in Grid-Connected Inverters and Converters)
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Review

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24 pages, 2667 KiB  
Review
A Review of Adaptive Control Methods for Grid-Connected PV Inverters in Complex Distribution Systems
by Tiantian Cao, Zhengyang Ye, Qiong Wu, Xiaorong Wan, Jiangyun Wang and Dayi Li
Energies 2025, 18(3), 473; https://doi.org/10.3390/en18030473 - 21 Jan 2025
Viewed by 478
Abstract
With the growth of energy demand and the aggravation of environmental problems, solar photovoltaic (PV) power generation has become a research hotspot. As the key interface between new energy generation and power grids, a PV grid-connected inverter ensures that the power generated by [...] Read more.
With the growth of energy demand and the aggravation of environmental problems, solar photovoltaic (PV) power generation has become a research hotspot. As the key interface between new energy generation and power grids, a PV grid-connected inverter ensures that the power generated by new energy can be injected into the power grid in a stable and safe way, and its power grid adaptability has also received more and more close attention in the field of new energy research. This research focuses on the discussion of PV grid-connected inverters under the complex distribution network environment, introduces in detail the domestic and international standards and requirements on grid-connected inverter grid adaptability, and then analyzes in depth the impacts of the access point voltage changes, access point frequency changes, and access point harmonic changes on the inverters. In order to enhance the adaptability of grid-connected inverters under these abnormal conditions, this research systematically summarizes and concludes a series of inverter adaptive control strategies, which provide literature guidance to effectively reduce the probability of power system faults and improve the reliability of the power system. Finally, the future development direction of PV inverter technology is outlooked, pointing out that, with the increase in the proportion of PV power generation in the power system, PV inverters need to evolve gradually from adapting to the grid to supporting the grid and promote the transformation of PV power generation from the auxiliary power source to the main power source through the integration of PV and energy storage. Full article
(This article belongs to the Special Issue Progress and Challenges in Grid-Connected Inverters and Converters)
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26 pages, 17313 KiB  
Review
Survey of Reliability Challenges and Assessment in Power Grids with High Penetration of Inverter-Based Resources
by Rouzbeh Haghighi, Van-Hai Bui, Mengqi Wang and Wencong Su
Energies 2024, 17(21), 5352; https://doi.org/10.3390/en17215352 - 28 Oct 2024
Cited by 1 | Viewed by 1348
Abstract
Decarbonization is driving power systems toward more decentralized, self-governing models. While these technologies improve efficiency, planning, operations, and reduce the carbon footprint, they also introduce new challenges. In modern grids, particularly with the integration of power electronic devices and high penetration of Renewable [...] Read more.
Decarbonization is driving power systems toward more decentralized, self-governing models. While these technologies improve efficiency, planning, operations, and reduce the carbon footprint, they also introduce new challenges. In modern grids, particularly with the integration of power electronic devices and high penetration of Renewable Energy Sources (RES) and Inverter-Based Resources (IBRs), traditional reliability concepts may no longer ensure adequate performance due to systemic restructuring. This shift necessitates new or significantly modified reliability indices to capture the characteristics of the evolving power system. Ensuring converter reliability is essential for effective planning, which requires precise, component-to-system-level modeling, as different converters impact system performance indicators. However, the existing literature in this field faces a significant limitation, as most studies focus on a singular perspective. Some examine reliability at the device-level, others at the component-level, while broader reviews in power systems often emphasize system-level analysis. In this paper, we aim to bridge these gaps by comprehensively reviewing the interconnections between these levels and analyzing the mutual influence of power converter and system reliability. A key point to highlight is that, with the rapid evolution of modern power grids, decision-makers must adopt a multi-level approach that incorporates insights from all levels to enable more accurate and realistic planning and operational strategies. Our ultimate goal is to provide an in-depth investigation of studies addressing the unique challenges posed by modern power grids. Finally, we will highlight the gaps in the literature and suggest directions for future research. Full article
(This article belongs to the Special Issue Progress and Challenges in Grid-Connected Inverters and Converters)
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