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Electronics
Special Issues
Stability Analysis and Optimal Operation in Power Electronic Systems
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Stability Analysis and Optimal Operation in Power Electronic Systems

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: 15 September 2026 | Viewed by 2026

Special Issue Editors

Dr. Bangbang He

E-Mail Website
Guest Editor
School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
Interests: stability analysis and design of power electronic systems; energy saving of railway traction power systems
Dr. Zhixuan Gao

E-Mail Website
Guest Editor
State Key Laboratory of Power Grid Safety, China Electric Power Research Institute, Beijing 100192, China
Interests: power system security and stability; sub-synchronous resonance and overvoltage; electromagnetic transient equivalence

Special Issue Information

Dear Colleagues,

Power electronics technology has become increasingly adopted in power, energy, and communication systems over recent decades, enhancing efficiency, power density, controllability, flexibility, and power quality. Unlike traditional energy conversion systems based on electric machines, power electronic converters introduce complex control dynamics that often lead to stability issues across wide frequency ranges and timescales, which is a critical challenge in power electronic systems. Addressing this challenge demands improved stability, reliability, and intelligence in power electronic technology.

Recently, power oscillations and disruptions have been increasingly reported in power electronic systems, ranging from AC/DC microgrids, distribution networks, high-voltage direct-current transmission systems, data centers, electric railways, and shipboard power systems. Therefore, this Special Issue aims to report the technical challenges and recent advances in the stability and optimal operation of power electronic systems.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

(1) Advanced modeling methods for power electronic systems.

(2) Small-signal stability analysis of power electronic systems.

(3) Large-signal stability analysis of power electronic systems.

(4) Stability enhancement and power quality improvement for power electronic systems.

(5) Optimal design methods for power electronic converters and systems.

(6) Advanced control strategies of power electronic converters and systems.

We look forward to receiving your contributions.

Dr. Bangbang He
Dr. Zhixuan Gao
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-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics 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

  • power electronic systems
  • stability analysis and enhancement
  • optimal design
  • advanced control

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Published Papers (3 papers)

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Research

21 pages, 4596 KB  
Article
Reactive Power Based Fault Ride Through Control of IBR-Dominated Distribution Networks Under Low WSCR
by DongYeong Gwon and YunHyuk Choi
Electronics 2026, 15(3), 521; https://doi.org/10.3390/electronics15030521 - 26 Jan 2026
Viewed by 769
Abstract
This study investigated the fault ride through capability of inverter-based resources in weak distribution networks and proposes a fault-oriented reactive power compensation strategy using only point of common coupling voltage measurements. The proposed strategy determines the reactive power command based on the minimum [...] Read more.
This study investigated the fault ride through capability of inverter-based resources in weak distribution networks and proposes a fault-oriented reactive power compensation strategy using only point of common coupling voltage measurements. The proposed strategy determines the reactive power command based on the minimum phase voltage, which represents the most severely depressed phase during unbalanced faults, without fault type detection or sequence component analysis. As a result, the same control framework can be applied to single-line-to-ground, double-line-to-ground, and three-phase faults. A detailed MATLAB/Simulink model of a Korean distribution feeder was developed using actual system parameters. The proposed strategy was compared with a no control case and a conservative fixed capacity reactive power injection scheme derived from commonly adopted power factor limits. Simulation results show that the no control case provides no voltage support, while the fixed capacity approach yields limited improvement in weak grids. In contrast, the proposed strategy maintains stable inverter operation and improves voltage recovery. At locations with an extremely low weighted short circuit ratio of 0.303, the proposed strategy prevents inverter tripping during temporary faults and satisfies low voltage ride through requirements, demonstrating its practical effectiveness. Full article
(This article belongs to the Special Issue Stability Analysis and Optimal Operation in Power Electronic Systems)
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23 pages, 3803 KB  
Article
Enhanced Frequency Dynamic Support for PMSG Wind Turbines via Hybrid Inertia Control
by Jian Qian, Yina Song, Gengda Li, Ziyao Zhang, Yi Wang and Haifeng Yang
Electronics 2026, 15(2), 373; https://doi.org/10.3390/electronics15020373 - 14 Jan 2026
Viewed by 511
Abstract
High penetration of wind farms into the power grid lowers system inertia and compromises stability. This paper proposes a grid-forming control strategy for Permanent Magnet Synchronous Generator (PMSG) wind turbines based on DC-link voltage matching and virtual inertia. First, a relationship between grid [...] Read more.
High penetration of wind farms into the power grid lowers system inertia and compromises stability. This paper proposes a grid-forming control strategy for Permanent Magnet Synchronous Generator (PMSG) wind turbines based on DC-link voltage matching and virtual inertia. First, a relationship between grid frequency and DC-link voltage is established, replacing the need for a phase-locked loop. Then, DC voltage dynamics are utilized to trigger a real-time switching of the power tracking curve, releasing the rotor’s kinetic energy for inertia response. This is further coordinated with a de-loading control that maintains active power reserves through over-speeding or pitch control. Finally, the MATLAB/Simulink simulation results and RT-LAB hardware-in-the-loop experiments demonstrate the capability of the proposed control strategy to provide rapid active power support during grid disturbances. Full article
(This article belongs to the Special Issue Stability Analysis and Optimal Operation in Power Electronic Systems)
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22 pages, 2108 KB  
Article
Comprehensive Parameter Optimization of Composite Harmonic Injection for Capacitor Voltage Fluctuation Suppression of MMC
by Tan Li, Yingxin Wang, Bin Yuan and Yu Meng
Electronics 2026, 15(2), 359; https://doi.org/10.3390/electronics15020359 - 13 Jan 2026
Viewed by 399
Abstract
Modular multilevel converter (MMC) is widely employed in high-voltage direct current (HVDC) systems for the long-distance renewable energy transmission, where the larger submodule (SM) capacitors significantly increase its size, weight and cost. Conventional capacitor voltage fluctuation suppression methods, such as composite harmonic injection [...] Read more.
Modular multilevel converter (MMC) is widely employed in high-voltage direct current (HVDC) systems for the long-distance renewable energy transmission, where the larger submodule (SM) capacitors significantly increase its size, weight and cost. Conventional capacitor voltage fluctuation suppression methods, such as composite harmonic injection (CHI) strategies, can achieve lightweight MMC. However, these approaches often neglect the dynamic constraints between harmonic injection parameters and their coupled effect on modulation wave, which not only leads to suboptimal global solutions but also increases the risk of system overshoot. Therefore, this paper proposes a comprehensive CHI parameters optimization method to minimize capacitor voltage fluctuations, thereby allowing for a smaller SM capacitor. First, the analytical expression of SM average capacitor voltage is developed, incorporating the injected second-order harmonic circulating current and third-order harmonic voltage. On this basis, an objective function is defined to minimize the sum of the fundamental and second-order harmonic components of the average capacitor voltage, with the harmonic injection parameters and modulation index as optimization variables. Then, these parameters are optimized using a particle swarm optimization (PSO) algorithm, where their constraints are set to prevent modulation wave overshoot and additional power loss. Finally, the optimization method is validated through a ±500 kV, 1500 MW MMC-HVDC system under various power conditions in PSCAD/EMTDC (version 4.6.3). In addition, simulation results demonstrate that the proposed method can achieve a 13.33% greater reduction in SM capacitance value compared to conventional strategies. Full article
(This article belongs to the Special Issue Stability Analysis and Optimal Operation in Power Electronic Systems)
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