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Energies
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Reliability of Power Electronics Devices and Converter Systems
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Reliability of Power Electronics Devices and Converter Systems

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

Deadline for manuscript submissions: 31 July 2025 | Viewed by 3869

Special Issue Editors

Prof. Dr. Wang Jun

E-Mail Website
Guest Editor
College of Electrical and Information Engineering, Hunan University, Changsha, China
Interests: power semiconductor devices and applications (including design, characterization, modeling, reliability, gate driver, converter control and topology)
Dr. Jun Zhang

E-Mail Website
Guest Editor
School of Electrical Engineering, Hohai University, Nanjing, China
Interests: power electronics reliability
Dr. Kun Tan

E-Mail Website
Guest Editor
School of Electrical Engineering and Automation, Anhui University, Hefei, China
Interests: advanced driving; condition monitoring; packaging; characterization of power semiconductor devices
Dr. Jingwei Zhang

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Hohai University, Changzhou, China
Interests: modeling of PV module and PV system; failure mechanisms of PV module; fault diagnosis; intelligent maintenance of PV systems; PV fed microgrids
Special Issues, Collections and Topics in MDPI journals
Dr. Hengyu Yu

E-Mail Website
Guest Editor
Electrical and Computer Engineering, The Ohio State University, Columbus, OH, USA
Interests: reliability and ruggedness of advanced semiconductor power devices; health state monitoring technologies; applications in power electronic systems

Special Issue Information

Dear Colleagues,

Power electronics, such as renewable energy generation systems, electric vehicles, and smart grids, are key in energy conversion and management. However, industrial experience indicates that the power converter is one of the weakest components in the system. Thus, there is a pressing need to improve the reliability of power converters and reduce the system downtime induced by the failure of power converters. The failure mechanism, thermal network model, junction temperature estimation, lifetime prediction, condition monitoring, and power electronics system thermal control become increasingly important. This Special Issue aims to present and disseminate the most recent advances related to the reliability of power electronics systems. Topics of interest for publication include, but are not limited to:

1 Failure and degradation mechanism of power devices and converters;

2 Testing methodologies, techniques, and platforms design for power devices and converters;

3 Junction temperature estimation and thermal management of power devices and converters;

4 Packaging and modeling of advanced semiconductor power devices, such as SiC, GaN, and Ga2O3;

5 Condition monitoring, fault detection, and diagnosis of power devices and converters;

6 Gate drivers and artificial intelligence-driven reliability enhancement methodology of power device and converters;

7 Digital twin modeling of power electronic converters and components.

Prof. Dr. Jun Wang
Dr. Jun Zhang
Dr. Kun Tan
Dr. Jingwei Zhang
Dr. Hengyu Yu
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

  • power device
  • power converter
  • reliability

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Published Papers (5 papers)

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Research

16 pages, 6807 KiB  
Article
A Novel Concept of High-Voltage Balancing on Series-Connected Transistors for Use in High-Speed Instrumentation
by Alexandr Despotuli, Viacheslav Kazmiruk, Anastasia Despotuli and Alexandra Andreeva
Energies 2025, 18(5), 1084; https://doi.org/10.3390/en18051084 - 24 Feb 2025
Viewed by 356
Abstract
The novel concept of reliable voltage balancing on N fast high-voltage (HV) transistors, connected in series, is verified by computer modeling/experimental testing. The essence of the concept is to transfer the balancing function from conventional snubbers, resistive dividers, varistors, etc., or sophisticated gate-side [...] Read more.
The novel concept of reliable voltage balancing on N fast high-voltage (HV) transistors, connected in series, is verified by computer modeling/experimental testing. The essence of the concept is to transfer the balancing function from conventional snubbers, resistive dividers, varistors, etc., or sophisticated gate-side control techniques, to “individual” resistive loads (of transistors) connected to “individual” HV sources of power. The concept has been implemented in the recently patented architecture of HV rectangular pulse generators. The operation of any series-connected stack requires (1) synchronization of control actions on gates of all N transistors; (2) static HV balancing on all transistors in OFF states; and (3) dynamic HV balancing during ON↔OFF transients. The goals of the new design are to achieve an exceptionally high level of HV balancing in modes (2) and (3), as well as to simplify the process of configuring/customizing the circuit. Testing confirms that new generators exhibit minimal ripple during ON→OFF transients. Reliable operation with high-quality rectangular pulses is ensured even at a voltage slew rate of more than 100 kV/µs, while each transistor blocks a voltage close to the maximum value specified in its datasheet. The presented novelties are likely suitable for high-speed instrumentation. Full article
(This article belongs to the Special Issue Reliability of Power Electronics Devices and Converter Systems)
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16 pages, 4864 KiB  
Article
Online Measurement Method for Circuit Breaker Mechanical–Time Characteristics Based on Transient Voltage and Current Signal Feature Extraction
by Liting Weng, Jianhua Xia, Zhaochuang Zhang, Jingang Wang, Lin Chen, Yingbo Zi, Lingyi Ma, Xingyu Zhang, Fan Zhang and Pengcheng Zhao
Energies 2025, 18(1), 24; https://doi.org/10.3390/en18010024 - 25 Dec 2024
Viewed by 611
Abstract
The good mechanical characteristics of circuit breakers are essential to ensuring their safe and stable operation. The characteristic signals at the points of initial opening and closing contain abundant information about the mechanical–time characteristics of the circuit breaker. Existing online measurement methods for [...] Read more.
The good mechanical characteristics of circuit breakers are essential to ensuring their safe and stable operation. The characteristic signals at the points of initial opening and closing contain abundant information about the mechanical–time characteristics of the circuit breaker. Existing online measurement methods for circuit breaker mechanical–time characteristics typically rely on monitoring the secondary current signals of the opening and closing coils, or the signals such as vibration, pressure, and angular displacement that are generated during the opening and closing of moving and stationary contacts. Unlike these conventional approaches, this paper proposes an online measurement method for circuit breaker mechanical–time characteristics based on feature extraction from transient voltage and current signals in the primary circuit. By extracting features from the transient voltage and current signals in the primary circuit, this method obtains mechanical–time characteristics such as the points of initial opening and closing. This method is convenient and stable, enabling the online detection of the mechanical characteristics of the circuit breaker. Finally, a comparison and analysis of the online measurement results with the offline measurement results were conducted. The analysis shows that the calculation error of the opening and closing times is within 0.2 ms. This online detection method has a high measurement accuracy and provides a new approach for the online measurement of the mechanical characteristics of circuit breakers. Full article
(This article belongs to the Special Issue Reliability of Power Electronics Devices and Converter Systems)
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19 pages, 6204 KiB  
Article
Online Monitoring Method for Opening and Closing Time of 10 kV Spring Energy Storage Circuit Breaker Based on Transient Electrical Signal Characteristic Point Marking and Self-Calibration
by Liting Weng, Jiangtao Xiao, Zhaochuang Zhang, Jingang Wang, Yuchuan Wen, Fan Zhang, Xingyu Zhang, Lingyi Ma and Pengcheng Zhao
Energies 2024, 17(24), 6436; https://doi.org/10.3390/en17246436 - 20 Dec 2024
Viewed by 610
Abstract
Among all circuit breaker faults, mechanical failures account for a considerable proportion, and online monitoring of their mechanical characteristics is of great practical significance. The opening and closing time is a very important feature of the mechanical characteristics of the circuit breaker. Online [...] Read more.
Among all circuit breaker faults, mechanical failures account for a considerable proportion, and online monitoring of their mechanical characteristics is of great practical significance. The opening and closing time is a very important feature of the mechanical characteristics of the circuit breaker. Online monitoring of the opening and closing time of the circuit breaker has always been the focus and difficulty of the intelligent technology of switchgear. In this paper, for a 10 kV spring energy storage vacuum circuit breaker, transient voltage and current signals are innovatively used to calibrate the opening time, breaking time, and closing time, and an online monitoring method for the opening and closing time of a vacuum circuit breaker based on transient electrical signals is proposed. An online monitoring platform was built and a multi-group closing test was carried out to simulate the power plant environment. The opening and closing time samples of a spring energy storage vacuum circuit breaker were measured and compared with the measurement results of the mechanical properties tester. The comparison results show that this method has good stability, and the calculation error is controlled within 1% after self-calibration, which provides a new idea for the online monitoring research of the mechanical characteristics of spring energy storage vacuum circuit breakers. Full article
(This article belongs to the Special Issue Reliability of Power Electronics Devices and Converter Systems)
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18 pages, 11573 KiB  
Article
Research on Junction Temperature Smooth Control of SiC MOSFET Based on Body Diode Conduction Loss Adjustment
by Junke Wu, Yunpeng Wei, Yuntao Wu, Zhou Wang, Xingyu Li and Xiangnan Wei
Energies 2024, 17(23), 6175; https://doi.org/10.3390/en17236175 - 7 Dec 2024
Viewed by 761
Abstract
In a converter of actual working condition, the change in the current and voltage of the power device will cause the junction temperature to fluctuate greatly. This device is subjected to high thermal stress due to the change in the junction temperature. Therefore, [...] Read more.
In a converter of actual working condition, the change in the current and voltage of the power device will cause the junction temperature to fluctuate greatly. This device is subjected to high thermal stress due to the change in the junction temperature. Therefore, it is necessary to adopt junction temperature control to reduce or smooth the junction temperature fluctuation, so as to realize the junction temperature control and improve the reliability of the device. At present, the methods for the junction temperature control of power devices have certain limitations and there are few active thermal management methods proposed for SiC device characteristics. In this paper, a method for realizing the smooth control of the junction temperature of a SiC device based on the conduction loss adjustment of the body diode for the SiC device has been proposed, considering that the conduction loss of the body diode is greater than the conduction loss of the SiC MOSFET. The conduction time of SiC MOSFET body diode was adjusted. By adjusting the conduction loss of the SiC MOSFET device, the fluctuation range of the junction temperature of the SiC MOSFET device was controlled, the smooth control of the junction temperature of the SiC device was realized, and the thermal stress of the device was reduced. Full article
(This article belongs to the Special Issue Reliability of Power Electronics Devices and Converter Systems)
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12 pages, 1614 KiB  
Article
Interference Characteristics of Electromagnetic Transient Overvoltage on Secondary Equipment of UHV Fixed Series Capacitors
by Baojiang Tian, Pei Guo, Xingwei Du, Xiaoyu Liao, Chao Xiao, Yiran Dong and Jingang Wang
Energies 2024, 17(21), 5495; https://doi.org/10.3390/en17215495 - 3 Nov 2024
Viewed by 804
Abstract
This manuscript addresses the issue of electromagnetic radiation interference experienced by secondary equipment in ultra-high voltage (UHV) fixed series capacitors (FSCs) under electromagnetic transient overvoltage conditions, which cannot be easily determined. To tackle this, a simulation and analysis method for the electromagnetic interference [...] Read more.
This manuscript addresses the issue of electromagnetic radiation interference experienced by secondary equipment in ultra-high voltage (UHV) fixed series capacitors (FSCs) under electromagnetic transient overvoltage conditions, which cannot be easily determined. To tackle this, a simulation and analysis method for the electromagnetic interference characteristics of secondary equipment is proposed. First, a primary system simulation model of UHV FSC is established, including modeling the platform’s multi-conductor system. The electromagnetic transient overvoltage signals between the low-voltage busbar and the high-potential platform are then simulated and analyzed under two conditions: spark gap triggering and disconnector operation. Next, a finite element model of secondary equipment is created to simulate and analyze the electric field distribution of different materials in the area of the measuring box. The shielding effectiveness of the measuring box is calculated using the overvoltage signals at the measuring box location as excitation. This method allows for the simulation of the electric field distribution in the measuring box area for different materials and calculates the shielding efficiency of the measuring box. It effectively simulates the complex electromagnetic environment of secondary equipment, assesses the electromagnetic shielding efficiency of the measuring box, and provides a theoretical basis for analyzing and improving the anti-interference characteristics of the measuring box. Full article
(This article belongs to the Special Issue Reliability of Power Electronics Devices and Converter Systems)
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