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Advanced Power Electronics Technology

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 8735

Special Issue Editors

Prof. Dr. Wenzhong Ma

E-Mail Website
Guest Editor
School of Shida Shanneng Renewable Energy, China University of Petroleum (East China), Qingdao 266580, China
Interests: power electronics technology and transmission; power system and automation; motor and its control technology
Special Issues, Collections and Topics in MDPI journals
Dr. Xingtian Feng

E-Mail Website
Guest Editor
College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
Interests: power electronics application; power quality analysis; distributed generation and energy storage technology
Dr. Shuguang Song

E-Mail Website
Guest Editor
School of Shida Shanneng Renewable Energy, China University of Petroleum (East China), Qingdao 266580, China
Interests: modeling and control of multilevel converters; power quality
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nowadays, power electronics play a crucial role in our daily life, which enables large renewable energy, such as photovoltaic and wind power integration, flexible power transmission, and high-efficiency power distribution and utilization. Advanced technologies, such as competitive topologies, new generation switching devices, control technologies, to name a few, are developing every day.

Modular structure-based high-voltage high-power DC/DC converters are one research topic of significant interest, which achieves direct DC/DC power conversion and is essential to a future DC grid. The wide-bandgap devices, such as GaN and SiC, have lower switching losses, higher blocking voltage, etc., compared with Si devices. One typical application is the small-size power adapter. In recent years, unconventional control strategies, such as fuzzy control, predictive control, and neural networks control, have been applied widely in power electronics systems, which bring new possibilities and keep increasing control performance. All these advanced power electronics technologies are a strong support to the modern power grid.

This Special Issue on “Advanced Power Electronics Technology” invites you to submit papers in, but not limited to, the following interesting topics:

  1. Converter and control: DC/AC converter, modulation, and control;
  2. Power devices and applications: Si, SiC, and GaN devices;
  3. Control, modelling, simulation, system stability, and reliability;
  4. Advanced controls for grid-forming/grid-following power electronics converters in the presence of disturbances, unbalances, offsets, harmonics, etc.;
  5. Advanced controls for high-performance electrical drive systems;
  6. Advanced controls of multi-level or multi-stack power converters;
  7. Advanced controls of AC, DC, or hybrid AC/DC microgrids;
  8. Conversion technologies for renewable energy and energy saving;
  9. Power electronics for electric vehicles, railway, marine, airplane, etc.;
  10. Power electronics for transmission and distribution;
  11. Power electronics for wireless power transfer;
  12. Power quality and harmonic controls;
  13. Advanced control solutions for power-electronics-dominated power systems;
  14. Integration of renewables (hydropower, wind power solar power, etc.) using advanced power electronics control schemes;
  15. Advanced controls of power electronics system for battery storage, supercapacitors, fuel-cells, fly wheels, etc.;
  16. Advanced controls of power electronics systems for intelligent charging (V1G) and vehicle-to-grid (V2G), vehicle to home (V2H) applications, etc.;
  17. Hardware-in-the-loop (HIL) and power hardware-in-the-loop (PHIL) testing of advanced power-electronics-based controllers;
  18. Finding equivalence between ADRC and classic control concepts and tools;
  19. Switching power supply: DC/DC converter, power factor correction converter.

Prof. Dr. Wenzhong Ma
Dr. Xingtian Feng
Dr. Shuguang Song
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

  • modelling and stability of power electronics
  • AC or DC power electronic converters
  • multilevel power electronic converters
  • energy router
  • soft normally open point (SNOP)
  • power electronic transformer
  • power electronics control
  • microgrid
  • renewable power generation
  • electrical energy conversion systems
  • energy management and optimization
  • applications and gate-drivers for wide-bandgap devices
  • wireless power transfer
  • motor drives
  • energy harvesting
  • electrified transportation
  • electromagnetics
  • power quality enhancement
  • artificial intelligence (AI) applications
  • battery energy storage technologies

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Published Papers (8 papers)

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Research

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21 pages, 12153 KiB  
Article
Stability Analysis and Controller Optimization of MMC in Standalone Mode
by Xingyu Liu, Shuguang Song, Wenzhong Ma and Yusheng Wang
Energies 2024, 17(21), 5474; https://doi.org/10.3390/en17215474 - 1 Nov 2024
Viewed by 517
Abstract
The modular multilevel converter (MMC) plays an important role in large-scale renewable energy integration and transmission, and it can also operate in standalone mode, powering AC passive loads. This paper focuses on the impact of load variation on the stability of the MMC. [...] Read more.
The modular multilevel converter (MMC) plays an important role in large-scale renewable energy integration and transmission, and it can also operate in standalone mode, powering AC passive loads. This paper focuses on the impact of load variation on the stability of the MMC. First, the impact of load variation on the MMC transfer function is analyzed in detail using the harmonic state-space (HSS) modeling method. Then, by means of the impedance-based stability analysis method, it is found that the MMC tends to become unstable with the increase in inductive loads. If the controller is not well-designed, the system may fail when loads change. Therefore, the worst-case design is used to guarantee the overall system’s stability under all load conditions. The impact of traditional proportional resonant (PR) controller parameters on the system’s stability is analyzed, revealing that the stability margin and control performance of the controller are limited. Thus, an improved controller structure with an additional series of compensators is proposed. Extensive simulation results in MATLAB/Simulink R2024a verify the analysis of this work and the effectiveness of the proposed controller. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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16 pages, 3957 KiB  
Article
Grid-Forming Control for Solar Generation System with Battery Energy Storage
by Yupeng Cai, Lujie Yu, Meng Wu, Shengyang Lv, Ziyu Fu, Wenhao Tong, Wei Li and Songjie Shi
Energies 2024, 17(15), 3642; https://doi.org/10.3390/en17153642 - 24 Jul 2024
Viewed by 770
Abstract
Solar generation systems with battery energy storage have become a research hotspot in recent years. This paper proposes a grid-forming control for such a system. The inverter control consists of the inner dq-axis current control, the dq-axis voltage control, the phase-locked loop (PLL) [...] Read more.
Solar generation systems with battery energy storage have become a research hotspot in recent years. This paper proposes a grid-forming control for such a system. The inverter control consists of the inner dq-axis current control, the dq-axis voltage control, the phase-locked loop (PLL) based frequency control, and the DC voltage control. The proposed control embeds the PLL into the grid-forming inverter control, offering the advantages of better synchronization and fault current-limiting capability. With the proposed control, the battery energy storage is able to provide inertial and primary frequency support during the grid frequency disturbance. Simulation models are established in PSCAD/EMTDC, and the results during the active power variation and AC voltage variation, the grid frequency disturbance, grid fault, and mode switch validate the effectiveness of the proposed control. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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24 pages, 5450 KiB  
Article
Adaptive Quasi-Super-Twisting Sliding Mode Control for Flexible Multistate Switch
by Wenzhong Ma, Xiao Wang, Yusheng Wang, Wenyan Zhang, Hengshuo Li and Yaheng Zhu
Energies 2024, 17(11), 2643; https://doi.org/10.3390/en17112643 - 29 May 2024
Viewed by 957
Abstract
The mathematical model of a flexible multistate switch (FMSS) exhibits nonlinear and strong coupling characteristics, whereas traditional power decoupling control makes it difficult to completely decouple the output power. The traditional proportional–integral control parameters are difficult to adjust, and their robustness and dynamic [...] Read more.
The mathematical model of a flexible multistate switch (FMSS) exhibits nonlinear and strong coupling characteristics, whereas traditional power decoupling control makes it difficult to completely decouple the output power. The traditional proportional–integral control parameters are difficult to adjust, and their robustness and dynamic performance are poor, which affects the stability of the voltage of the power distribution network and feeder power. To address these problems, this study first converted the original system into a linear system via coordinate transformation using feedback-accurate linearization to decouple active and reactive currents. Thereafter, a super-twisting sliding mode control (ST-SMC) algorithm was introduced, and an adaptive quasi-super-twisting sliding mode control (AQST-SMC) algorithm comprising the quasi-sliding mode function and adaptive proportional term was proposed. An FMSS double closed-loop controller was designed to achieve improved vibration suppression and convergence speed. A three-port FMSS simulation model was developed using MATLAB/Simulink, and the simulation results show that the proposed control strategy enhances the robustness and dynamic performance of the system. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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10 pages, 3237 KiB  
Article
Simulation and Characterization of Micro-Discharge Phenomena Induced by Glitch Micro-Defects on an Insulated Pull Rod Surface
by Shu Niu, Shuai Li, Jizhong Liang, Guodong Li, Fan Hu, Hai Zhang, Yujie Zhu, Xianhao Fan and Chuanyang Li
Energies 2024, 17(11), 2594; https://doi.org/10.3390/en17112594 - 28 May 2024
Cited by 1 | Viewed by 703
Abstract
The reliability of GIS (gas-insulated switchgear) circuit breakers significantly depends on the condition of the insulated pull rods, with micro-defects on their surface posing a potential risk for micro-discharges and breakdown incidents. Experimentally investigating these micro-discharges is challenging due to their minute nature. [...] Read more.
The reliability of GIS (gas-insulated switchgear) circuit breakers significantly depends on the condition of the insulated pull rods, with micro-defects on their surface posing a potential risk for micro-discharges and breakdown incidents. Experimentally investigating these micro-discharges is challenging due to their minute nature. This study introduces a framework to examine the linkage between micro-defects and micro-discharges, coupled with numerical simulations of the micro-discharge process in insulated pull rods afflicted by surface infiltration flaws under operational conditions. Initially, samples containing micro-defects were sectioned via water jet cutting for microstructural analysis through white light interferometry. Subsequently, a two-dimensional axisymmetric model simulating positive corona discharge from a needle to a plate electrode was employed to derive the relationship between charged particle density and the electric field in SF6 and air. Building on these observations, a micro-discharge model specific to micro-defects was developed. Comparative analysis of micro-discharge behaviors in SF6 and air for identical defect types was conducted. This research framework elucidates the discharge dynamics of charged particles in SF6 and air during micro-discharge events, shedding light on the mechanisms underpinning micro-discharges triggered by insulation rod defects. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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19 pages, 15586 KiB  
Article
A Spread-Spectrum Modulation Scheme for a 3 × 6 Indirect Matrix Converter Based on a Current Ripple Model
by Zhanqing Zhou, Lingyue Xue, Chen Li and Qiang Geng
Energies 2024, 17(11), 2546; https://doi.org/10.3390/en17112546 - 24 May 2024
Viewed by 821
Abstract
Focused on addressing harmonic suppression in multiphase indirect matrix converters (IMCs), this study explores spread-spectrum modulation technology through ripple analysis calculations. We introduce a current ripple spread-spectrum modulation (CR-SSM) method tailored for multiphase IMC systems. In this approach, a 3 × 6-phase IMC [...] Read more.
Focused on addressing harmonic suppression in multiphase indirect matrix converters (IMCs), this study explores spread-spectrum modulation technology through ripple analysis calculations. We introduce a current ripple spread-spectrum modulation (CR-SSM) method tailored for multiphase IMC systems. In this approach, a 3 × 6-phase IMC is modeled as a two-port network, and a small-signal model of the output side is established. The transfer function is utilized to analyze the two-port network in the complex frequency domain (s-plane). The time-domain expression of the output current ripple is derived in vector form. Subsequently, the distribution of the output ripple and locus are determined based on specified constraints. The carrier frequency is dynamically adjusted online according to the specified ripple locus. Compared to classical periodic PWM methods, this approach offers a broader range of frequency variations and achieves a more uniform output spectrum. Furthermore, CR-SSM optimizes system efficiency and enhances spread-spectrum modulation. Experimental results demonstrate that this method effectively enhances the quality of input and output waveforms in multiphase IMC systems. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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14 pages, 6369 KiB  
Article
A DCM-Based Non-Isolated Step-Down DC Transformer
by Minseung Kim, Donghee Choi and Soo Hyoung Lee
Energies 2024, 17(4), 940; https://doi.org/10.3390/en17040940 - 17 Feb 2024
Viewed by 879
Abstract
DC transformers have emerged as essential devices for medium voltage DC (MVDC)-low voltage DC (LVDC) distribution systems. However, conventional step-down single-level converters have limits on the voltage level of the MVDC-LVDC distribution system. This paper proposes a non-isolated step-down (NISD) DC transformer based [...] Read more.
DC transformers have emerged as essential devices for medium voltage DC (MVDC)-low voltage DC (LVDC) distribution systems. However, conventional step-down single-level converters have limits on the voltage level of the MVDC-LVDC distribution system. This paper proposes a non-isolated step-down (NISD) DC transformer based on discontinuous conduction mode (DCM). The proposed structure can withstand high voltage levels by sharing voltages between energy storage modules dividing voltage levels. The proposed NISD DC transformer determines operational modes based on energy storage modules and performs the voltage conversion process. The effectiveness of the proposed NISD DC transformer is verified based on a case study using a power system computer-aided design and electromagnetic transient simulation engine including DC (PSCAD/EMTDC™). Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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16 pages, 4817 KiB  
Article
An Optimized Switching Strategy Based on Gate Drivers with Variable Voltage to Improve the Switching Performance of SiC MOSFET Modules
by Jixiang Tan and Zhongfu Zhou
Energies 2023, 16(16), 5984; https://doi.org/10.3390/en16165984 - 15 Aug 2023
Cited by 4 | Viewed by 1407
Abstract
This paper proposes an optimized switching strategy (OSS) based on a silicon carbide (SiC) MOSFET gate driver with variable voltage, which allows simultaneous variations in several different parameters to optimize the switching performance of semiconductor devices. As a relatively new device, the SiC [...] Read more.
This paper proposes an optimized switching strategy (OSS) based on a silicon carbide (SiC) MOSFET gate driver with variable voltage, which allows simultaneous variations in several different parameters to optimize the switching performance of semiconductor devices. As a relatively new device, the SiC MOSFET shines in the field of high power density and high-frequency switching; it has become a popular solution for electric vehicles and renewable energy conversion systems. However, the increase in voltage and current slope caused by high switching speeds inevitably increases the overshoot and oscillation in a circuit and can even generate additional losses. The principle of this new control strategy is to change the voltage and current in the turn-on and turn-off stages by changing the gate driver’s voltage. That is, we reduced the drive’s voltage after a certain time delay and maintained it for a period of time, thus directly controlling the slopes of di/dt and dv/dt. This study focused on the optimization of the SiC MOSFET by changing the time delay preceding the decrease in the voltage of the gate driver, analyzing and calculating the optimal time delay before the decrease in the voltage of the gate driver, and verifying the findings using LTspice simulation software. The simulated results were compared and analyzed with hard-switching strategies. The results showed that the proposed OSS can improve the switching performance of SiC MOSFETs. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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Review

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18 pages, 3649 KiB  
Review
Review of Surface Charge Accumulation on Insulators in DC Gas-Insulated Power Transmission Lines: Measurement and Suppression Measures
by Fangwei Liang, Hanhua Luo, Xianhao Fan, Xuetong Li and Xu Wang
Energies 2023, 16(16), 6027; https://doi.org/10.3390/en16166027 - 17 Aug 2023
Cited by 3 | Viewed by 1577
Abstract
Gas-insulated power transmission lines (GILs) can replace cables and overhead transmission lines, playing an important role in DC transmission systems. However, the influence of surface charge accumulation on insulation reliability cannot be ignored as the operational voltage of the DC GIL increases. In [...] Read more.
Gas-insulated power transmission lines (GILs) can replace cables and overhead transmission lines, playing an important role in DC transmission systems. However, the influence of surface charge accumulation on insulation reliability cannot be ignored as the operational voltage of the DC GIL increases. In this paper, the measurement methods for the insulator surface potential are summarized, including, dust maps, the Pockels effect method, and the electrostatic probe method. Then, a typical surface charge inversion algorithm is introduced. The main influencing factors of surface charge accumulation are analyzed, such as the applied voltage, insulation gas, insulator shape, and temperature. The charge accumulation pathway is revealed. Furthermore, methods for inhibiting the accumulation of surface charges and promoting the dissipation of accumulated charges are introduced to reduce the surface charges on insulators. Finally, the development direction of DC GIL insulators is predicted. We anticipate that the online monitoring of surface charge distribution, clarifying the percentage of charge accumulation pathways, and optimizing the insulator casting process will be the research directions for the insulator surface charge topic in the future. This article provides a comprehensive understanding of the surface charges of GIL insulators and a reference for the insulation design of DC GILs. Full article
(This article belongs to the Special Issue Advanced Power Electronics Technology)
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