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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F1: Electrical Power System".

Deadline for manuscript submissions: 15 May 2026 | Viewed by 4979

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Special Issue Editor

Prof. Dr. Weibo Li

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Guest Editor

School of Automation, Wuhan University of Technology, Wuhan 430070, China
Interests: power system; fault diagnosis; complex systems; power electronics

Special Issue Information

Dear Colleagues,

Power electronics technology has become a core technology in modern power systems, fundamentally transforming the way in which electrical energy is converted, controlled, and distributed. In addition, the integration of power electronic devices and systems has become increasingly crucial in addressing the challenges associated with modern power infrastructure, from enhancing the stability and reliability of the grid to enabling the efficient integration of renewable energy sources. Recent technological breakthroughs in semiconductor devices, control architectures, system integration, energy management, fault diagnosis, and fault-tolerant control provide novel opportunities for the application of power electronics in power systems.

This Special Issue aims to showcase and disseminate recent advances and technological innovations in power electronics for power system applications.

The scope of this Special Issue includes, but is not limited to, the following topics:

Modeling, simulation, and analysis of power electronic systems;
Reliability design and assessment of power electronic systems;
Fault diagnosis of power electronic systems;
Online monitoring and health management of power electronic systems;
Artificial intelligence-based fault detection and diagnosis methods;
Reliability design and assessment of power electronic systems;
Coordinated control of hybrid energy systems;
Artificial intelligence-based energy management.

Prof. Dr. Weibo Li
Guest Editor

Manuscript Submission Information

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Keywords

power electronics
power systems
energy management
fault diagnosis
reliability
smart grid

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Published Papers (6 papers)

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Research

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25 pages, 4207 KB

Open AccessArticle

SiC MOSFET Switching Dynamics and Power Conversion Loss Characterization Under Parametric Variations

by Jamlick M. Kinyua and Mutsumi Aoki

Energies 2025, 18(23), 6264; https://doi.org/10.3390/en18236264 - 28 Nov 2025

Cited by 1 | Viewed by 520

Abstract

In pursuit of enhancing the performance of power converters, high-frequency power devices have become indispensable due to their superior switching capabilities, reduced conduction loss, and enhanced thermal performance. However, optimizing their efficiency requires a profound comprehension of the interplay between various parameters (the current, voltage, and gate resistance) on switching dynamics and power losses. This study presents a comprehensive framework of loss characterization with multi-parametric variations. The influence of drain-source current

(I_{d s})

, DC voltage

(V_{d c})

, and gate resistor

(R_{g})

on switching and conduction losses are explicitly quantified. A significant contribution of this study lies in the comprehensive analytical and empirical characterization of the turn-on and turn-off power dissipation dynamics in SiC MOSFETs, emphasizing the intricate interplay between parameters and efficiency. Conventional studies primarily focus on empirical loss characterization, yet this work advances the field by introducing a predictive loss model that systematically correlates

R_{g}

I_{d s}

, and

V_{d c}

variations with induced switching dynamics, and EMI mitigation strategies. Increasing

R_{g}

effectively suppresses voltage overshoots and mitigates ringing effects, concurrently prolonging switching events, thereby broadening the power dissipation profile and influencing system-level performance. Furthermore, this study rigorously evaluates the commutation behavior of the SiC MOSFET/SBD pair, providing an in-depth examination of its dynamic loss characterization under varying conditions. This novel insight establishes a crucial framework for efficiency drive optimization. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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20 pages, 3505 KB

Open AccessArticle

Optimization Method for Regulating Resource Capacity Allocation in Power Grids with High Penetration of Renewable Energy Based on Seq2Seq Transformer

by Chunyuan Nie, Hualiang Fang, Xuening Xiang, Wei Xu, Qingsheng Lei, Yan Li, Yawen Wang and Wei Yang

Energies 2025, 18(19), 5218; https://doi.org/10.3390/en18195218 - 1 Oct 2025

Viewed by 465

Abstract

With the high penetration of renewable energy integrated into the power grid, the system exhibits strong randomness and volatility. To balance these uncertainties, a large amount of flexible regulating resources is required. This paper proposes an optimization method based on a Seq2Seq Transformer model, which takes stochastic renewable energy and load data as inputs and outputs the allocation ratios of various regulating resources. The method considers renewable energy stochasticity, power flow constraints, and adjustment characteristics of different regulating resources, while constructing a multi-objective loss function that integrates ramping response matching and cost minimization for comprehensive optimization. Furthermore, a multi-feature perception attention mechanism for stochastic renewable energy is introduced, enabling better coordination among resources and improved ramping speed adaptation during both model training and result generation. A multi-solution optimization framework with Pareto-optimal filtering is designed, where the Decoder outputs multiple sets of diverse and balanced allocation ratio combinations. Simulation studies based on a regional power grid demonstrate that the proposed method effectively addresses the problem of regulating resource capacity optimization in new-type power systems. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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22 pages, 7371 KB

Open AccessArticle

Online Junction Temperature Measurement for Power MOSFETs Using the Body Diode Under Varying Forward Currents

by Xueli Zhu, Yajie Huang, Donglai Zhang, Yuepeng Zhang, Jun Wu, Bowen Jiang, Linzhong Xia, Bo Gao and Changwei Lv

Energies 2025, 18(19), 5045; https://doi.org/10.3390/en18195045 - 23 Sep 2025

Cited by 1 | Viewed by 1026

Abstract

Power metal-oxide-semiconductor field-effect transistors (MOSFETs) provide numerous advantages and are widely utilized in various power circuits. The junction temperature plays a critical role in determining the reliability, performance, and operational lifetime of power MOSFETs. Therefore, accurate monitoring of the junction temperature of power MOSFETs is essential to ensure the safe operation of power circuit systems. In bridge or motor drive circuits, MOSFETs often operate in a freewheeling state via the body diode, where the freewheeling current is typically variable. The proposed method for junction temperature measurement utilizes the body diode and is designed to accommodate varying forward currents. It also accounts for the temperature-dependent ideality factor to improve measurement accuracy. By integrating the forward voltage and forward current of the body diode, this approach reduces the required sampling frequency. To validate the method’s effectiveness, three representative types of power MOSFETs, a Si MOSFET (IRF520), a SiC MOSFET (C2M0080120D), and an aerospace-grade radiation-hardened MOSFET (RSCS25045T1RH), were used to measure junction temperatures before and after irradiation. Following ideality factor correction, the maximum absolute error compared to reference measurements from thermocouples and a thermal imager remained within 2 K across the temperature range of 300 K to 420 K. Experimental results confirm the feasibility of the proposed method. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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22 pages, 15716 KB

Open AccessArticle

Research on the Design and Application of Multi-Port Energy Routers

by Xianping Zhu, Weibo Li, Kangzheng Huang, Shuai Cao, Boyu Lin, Rentai Li and Wei Xu

Energies 2025, 18(4), 866; https://doi.org/10.3390/en18040866 - 12 Feb 2025

Cited by 1 | Viewed by 1262

Abstract

At present, the development of the global energy internet is occurring in depth and the construction of a distributed power supply is rapid, and the energy router (ER), as a key device for integrating energy flow and information flow, has important application value in microgrids. In this paper, a multi-port energy router based on a 710 V DC bus is designed and developed with a modular structure design, including core components such as a total controller, a power converter, a hybrid energy storage system, and an auxiliary power supply. Flexible access and the management of multiple-voltage-level ports (690 V AC, 380 V AC, 220 V DC, and 24 V DC) are realized through rational topology design. The test results of the device show that the system performance indexes meet the design requirements. The operation is stable and reliable, displaying strong practical engineering value, and at the same time provides a technical solution that can be borrowed for other special scenarios such as the microgrid system. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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31 pages, 807 KB

Open AccessReview

A Review of Key Technologies for Active Midpoint Clamping (ANPC) Topology in Energy Storage Converters: Modulation Strategies, Redundant Control, and Multi-Physics Field Co-Optimization

by Hui Huang, Shuai Cao, Bin Yi, Lianghe Zhu, Pandian Luo, Wei Xu, Gouyi Chen and Dake Li

Energies 2025, 18(23), 6169; https://doi.org/10.3390/en18236169 - 25 Nov 2025

Viewed by 386

Abstract

To enhance the operational efficiency of energy storage converters in grid-connected systems with high renewable penetration, this study systematically investigates key technologies of active neutral-point clamped (ANPC) topology under “electrical–thermal–mechanical” multi-physical field coupling. The study reviews recent progress in structural design, modulation strategies, and fault-tolerant control, highlighting their impact on efficiency, reliability, and power density. At the structural stage, a hybrid SiC/IGBT device configuration combined with a three-dimensional stacked bus reduces conduction loss and achieves parasitic inductance. In the modulation stage, improved finite-set model predictive control and adaptive space vector modulation shorten computation time to 20 µs and keep total harmonic distortion (THD) within 2.8%. System-level evaluations demonstrate that a 250 kW ANPC converter attains a peak efficiency of 99.1%, a power density of 4.5 kW/kg, and a mean time between failure exceeding 150,000 h. These findings reveal a clear transition from single-objective performance improvement toward integrated multi-physics co-design. By unifying advanced modulation, intelligent fault-tolerant control, and multi-field coupling optimization, ANPC-based converters advance converters to a new stage of higher efficiency, reliability, and stability. The results provide essential technical support for next-generation power conversion systems in renewable-rich grids. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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37 pages, 1415 KB

Open AccessReview

Energy Symbiosis in Isolated Multi-Source Complementary Microgrids: Diesel–Photovoltaic–Energy Storage Coordinated Optimization Scheduling and System Resilience Analysis

by Jialin Wang, Shuai Cao, Rentai Li and Wei Xu

Energies 2025, 18(21), 5741; https://doi.org/10.3390/en18215741 - 31 Oct 2025

Viewed by 794

Abstract

The coordinated scheduling of diesel generators, photovoltaic (PV) systems, and energy storage systems (ESS) is essential for improving the reliability and resilience of islanded microgrids in remote and mission-critical applications. This review systematically analyzes diesel–PV–ESSs from an “energy symbiosis” perspective, emphasizing the complementary roles of diesel power security, PV’s clean generation, and ESS’s spatiotemporal energy-shifting capability. A technology–time–performance framework is developed by screening advances over the past decade, revealing that coordinated operation can reduce the Levelized Cost of Energy (LCOE) by 12–18%, maintain voltage deviations within 5% under 30% PV fluctuations, and achieve nonlinear resilience gains. For example, when ESS compensates 120% of diesel start-up delay, the maximum disturbance tolerance time increases by 40%. To quantitatively assess symbiosis–resilience coupling, a dual-indicator framework is proposed, integrating the dynamic coordination degree (ζ ≥ 0.7) and the energy complementarity index (ECI > 0.75), supported by ten representative global cases (2010–2024). Advanced methods such as hybrid inertia emulation (200 ms response) and adaptive weight scheduling enhance the minimum time to sustain (MTTS) by over 30% and improve fault recovery rates to 94%. Key gaps are identified in dynamic weight allocation and topology-specific resilience design. To address them, this review introduces a “symbiosis–resilience threshold” co-design paradigm and derives a ζ–resilience coupling equation to guide optimal capacity ratios. Engineering validation confirms a 30% reduction in development cycles and an 8–12% decrease in lifecycle costs. Overall, this review bridges theoretical methodology and engineering practice, providing a roadmap for advancing high-renewable-penetration islanded microgrids. Full article

(This article belongs to the Special Issue Advancements in Power Electronics for Power System Applications)

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