Advanced Power Electronic Conversion and Voltage Control Processes for Flexible Grid Operation

A Special Issue of Processes (ISSN 2227-9717) belonging to the section "Energy Systems".

Deadline for manuscript submissions: 31 January 2027 | Viewed by 347

Editors


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Guest Editor
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Interests: high-efficiency and high-quality power conversion and utilization; flexible operation and control of power systems; advanced electrical equipment

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Guest Editor
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
Interests: mechanisms of insulation failure and reliability of medium-to-high-frequency electrical equipment; insulation fault early warning and intelligent diagnosis of variable frequency motor systems

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Guest Editor
School of Control and Information Engineering, Northeast Forestry University, Harbin 150001, China
Interests: resonant power conversion; high-frequency power conversion; grid interface power converter

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Guest Editor
School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Interests: power electronics technology; power devices; condition monitoring; reliability evaluation; health management
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Guest Editor
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Interests: resonant power conversion; high-frequency power conversion; grid interface power converter

Special Issue Information

Dear Colleagues,

Against the backdrop of the global transition toward low-carbon and clean energy, the large-scale integration of high-penetration renewable energy and power electronic equipment is profoundly reshaping the physical characteristics and operational mechanisms of traditional power grids. Power grids are increasingly evolving toward high-penetration, power electronics-dominated, flexible systems, making efficient energy conversion and active grid-support control technologies increasingly crucial in modern power systems. Nevertheless, the transition from traditional grids to modern power systems with high renewable penetration introduces significant technical challenges in dynamic stability, multi-scale voltage regulation, and high-frequency power conversion.

This Special Issue will gather the latest theoretical developments, technological breakthroughs, and engineering practices in advanced power electronic conversion topologies, grid-forming (GFM) and grid-following (GFL) control strategies, weak grid modeling and stability analysis, refined voltage control under high renewable penetration, and key technologies for enhancing flexible grid operations. Through this Special Issue, we will establish a professional platform for academia and industry to collaboratively address the challenges associated with high-penetration renewable energy grids.

Scope of Interest:

(1). Advanced Power Conversion Topologies and Designs: High-efficiency, high-power-density converter topologies and wide-bandgap semiconductor device applications for renewable energy generation and large-capacity energy storage systems.

(2). Flexible Grid Operation and Control Strategies: Innovative control methods for grid-forming (GFM) and grid-following (GFL) inverters, multi-machine cooperative control, and grid synchronization techniques.

(3). Advanced Voltage Control and Reactive Power Compensation: Dynamic reactive power/voltage control (dynamic VAR), harmonic suppression, power quality cooperative control, and reactive power compensation techniques.

(4). Weak Grid Stability Analysis and Modeling: Impedance modeling of converter-grid interfaces, small-signal/transient stability analysis, wideband oscillation, and interaction mechanism studies.

(5). Smart Operation and Energy Management: Data-driven or AI-based real-time voltage optimization, distributed energy management, and coordinated control in complex distribution networks.

(6). Reliability, Protection, and Fault Ride-Through: Condition monitoring of converter-interfaced systems, fault ride-through (FRT) capabilities, and robust protection schemes.

We invite scholars, researchers, and engineers in related fields to submit their research to this Special Issue. We accept original research articles, state-of-the-art reviews, and typical case studies, aiming to foster discussion and advance technologies in advanced power electronic conversion and flexible grid operations. We look forward to receiving your valuable contributions and insights.

Dr. Dongbo Guo
Dr. Yatai Ji
Dr. Tingting Yao
Dr. Yanyong Yang
Prof. Dr. Yueshi Guan
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes 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 2400 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

  • advanced power electronic conversion
  • flexible grid operation
  • high-penetration renewable energy
  • voltage control
  • power electronic-dominated power systems
  • grid-forming control/grid-forming technology
  • weak grid stability
  • smart energy management and control

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Published Papers (1 paper)

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Research

30 pages, 6126 KB  
Article
Coordinated Control of an Energy-Storage-Integrated Modular Multi-Level AC–AC Converter for Equal-Frequency Flexible Interconnection in Distribution Networks
by Chao Ding, Jinyang Gao, Yi Lu, Peng Qiu, Feng Xu, Xinyang Wang, Yi Wang and Jiaxing Lei
Processes 2026, 14(18), 2949; https://doi.org/10.3390/pr14182949 - 16 Sep 2026
Viewed by 195
Abstract
To address equal-frequency AC–AC flexible interconnection and cross-regional power-flow regulation in medium-voltage distribution networks with a high penetration of distributed generation and flexible loads, this paper proposes a coordinated control strategy for an energy-storage-integrated modular multi-level AC–AC converter. The converter adopts a back-to-back [...] Read more.
To address equal-frequency AC–AC flexible interconnection and cross-regional power-flow regulation in medium-voltage distribution networks with a high penetration of distributed generation and flexible loads, this paper proposes a coordinated control strategy for an energy-storage-integrated modular multi-level AC–AC converter. The converter adopts a back-to-back MMC topology with distributed energy storage and enables controllable power exchange among multiple feeders. Feeder states, net-load conditions, loading limits, and SOC-dependent storage boundaries are mapped into four operating zones. Under normal conditions, the strategy coordinates port power and energy-storage buffering to balance feeder loading. When the storage reaches its SOC limits, photovoltaic curtailment or non-critical load shedding maintains the active-power balance. Under feeder faults, the hierarchical support and master–slave reconfiguration restore islanded loads and rebuild the DC-voltage reference. Electromagnetic-transient simulations show that the proposed control completes load balancing or reconfiguration within 37.0–62.0 ms, limits the maximum DC-bus voltage deviation to 3.323%, and restores 99.96–100% of the off-grid demand. Compared with a conventional SOP benchmark, it reduces the Zone 1 loading-excess integral by 98.23% and avoids 3.80–10.75 MW of unsupported demand under feeder-fault conditions. Full article
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