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Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems,...
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Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition

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

Deadline for manuscript submissions: closed (15 September 2024) | Viewed by 12726

Special Issue Editor

Prof. Dr. Jingyang Fang

E-Mail Website
Guest Editor
School of Control Science and Engineering, Shandong University, Jinan 250061, China
Interests: power electronics; power systems; digital control; energy storage; renewable energies; stability and power quality of grid-tied power converters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As the trend of the massive integration of power electronics-coupled renewable energies, electric vehicles, and energy storage continues, modern power grids are experiencing a revolutionized transition to more-electronics power systems. Along with the large-scale employment of power converters, power quality issues (e.g., harmonics, reactive power, and imbalances) and stability problems (e.g., converter-level instabilities and system-level loss of synchronization) are emerging and evolving. Despite being major trouble sources, grid-tied power converters are promising solutions to such problems mostly due to their flexible and strong control. This Special Issue focuses on the enhancement of power quality and stability of modern power systems through power-electronic-based solutions. It aims to lay a foundation for the further integration of renewable energies in future renewable-dominated power systems. The topics of presentations and research papers include, but are not limited to, the following:

  • Modeling, control, and design of grid-forming power conversion systems;
  • Inertia emulation and fast frequency control via power converters and energy storage;
  • Synchronization of multiple grid-tied converters;
  • Smart converters with stability enhancement and power quality conditioning;
  • Virtual synchronous machines (VSMs) and virtual oscillators;
  • Real-time control and optimization of 100% power-electronic-coupled power systems;
  • Next-generation grid codes and standards.

Prof. Dr. Jingyang Fang
Guest Editor

Manuscript Submission Information

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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.

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Keywords

  • power electronics
  • power systems
  • grid-tied power converters
  • modeling and control
  • inertia
  • stability
  • synchronization
  • power quality
  • virtual synchronous machines (VSMs)
  • real-time optimization

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Published Papers (7 papers)

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Research

22 pages, 5626 KiB  
Article
A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
by Saeed Golestan, Manuel Barrios, Hessam Golmohamadi, Florin Iov, Birgitte Bak-Jensen and Mohammad Monfared
Electronics 2024, 13(16), 3143; https://doi.org/10.3390/electronics13163143 - 8 Aug 2024
Viewed by 763
Abstract
A grid-forming voltage source converter with an integrated step-down transformer could be a promising solution for supplying low-voltage alternating current loads from a medium-voltage direct current supply. However, it may require a control system that gathers feedback signals from both the primary and [...] Read more.
A grid-forming voltage source converter with an integrated step-down transformer could be a promising solution for supplying low-voltage alternating current loads from a medium-voltage direct current supply. However, it may require a control system that gathers feedback signals from both the primary and secondary sides of the transformer, which in turn complicates the derivation of a standard form linear model. The absence of such a model complicates control tuning, as well as the assessment of dynamics and stability of the converter system. The objective of this paper is to address this gap in knowledge. For the case study, a conventional H-bridge converter with a step-down transformer and an αβ-frame dual-loop grid-forming controller is considered. Initially, comprehensive guidelines on deriving a standard form linear model for this converter system are presented. Then, the impact of controlling the VSC in a dq frame and the changes in the transformer vector group on the small-signal model of the VSC are analyzed. The aspects of control tuning are also discussed in detail, and the model’s accuracy and efficacy are validated both theoretically and through control hardware-in-the-loop (C-HIL) tests using a Typhoon HIL setup. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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24 pages, 12264 KiB  
Article
An Adaptive Virtual-Impedance-Based Current-Limiting Method with the Functionality of Transient Stability Enhancement for Grid-Forming Converter
by Xuekai Hu, Zifan Li, Cunyue Pan, Hao Li and Yingyu Liang
Electronics 2024, 13(14), 2750; https://doi.org/10.3390/electronics13142750 - 13 Jul 2024
Cited by 1 | Viewed by 556
Abstract
Grid-forming (GFM) converters are regarded as the most promising solution for grid-connected converters of renewable energy due to their robustness against weak grids. However, attributable to their voltage source characteristics, GFM converters may experience overcurrent issues during large disturbances. The virtual impedance (VI) [...] Read more.
Grid-forming (GFM) converters are regarded as the most promising solution for grid-connected converters of renewable energy due to their robustness against weak grids. However, attributable to their voltage source characteristics, GFM converters may experience overcurrent issues during large disturbances. The virtual impedance (VI) method is an effective method to solve this problem. Nevertheless, there exists a contradiction between the demands for VI posed by current limitations and transient stability. Firstly, the analytical equations of virtual impedance for limiting the fault steady-state current of a GFM converter with different depths of grid voltage sag are solved. On that basis, an adaptive method based on virtual impedance is proposed to limit the fault current. Moreover, the analytical equation of the output active power of the converter when using adaptive virtual impedance to limit the fault current is solved. On this basis, the effect of the virtual impedance ratio on the transient stability is investigated. Finally, an adaptive virtual-impedance-based current-limiting method with the functionality of transient stability enhancement for a grid-forming converter is innovatively proposed. The enhancement effect of the method is verified by the equal area criterion method and phase portrait method. Finally, the efficacy of the proposed method in limiting fault currents and enhancing transient stability is validated through hardware-in-the-loop (HIL) experiments. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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17 pages, 3759 KiB  
Article
Stability Analysis and Control Strategy Optimization of a Paralleled IPOS Phase-Shifted Full-Bridge Converters System Based on Droop Control
by Zhenghao Qin, Huafeng Cai and Xinchun Lin
Electronics 2023, 12(17), 3685; https://doi.org/10.3390/electronics12173685 - 31 Aug 2023
Viewed by 900
Abstract
The application of high-power DC equipment further increases the power supply scale of DC systems. But, it is difficult for a single converter to support high transmission power, so multiple converters must operate in parallel for efficient power transmission. In a parallel system [...] Read more.
The application of high-power DC equipment further increases the power supply scale of DC systems. But, it is difficult for a single converter to support high transmission power, so multiple converters must operate in parallel for efficient power transmission. In a parallel system comprising many IPOS phase-shifting full-bridge converters, current sharing can be realized via droop control. However, the stability of the parallel system using current-sharing control will appear poor in light load conditions, so it is necessary to analyze the stability of parallel systems in light load conditions. Firstly, a single IPOS phase-shifted full-bridge control system is modeled; on this basis, the state space model of the n-module paralleled IPOS phase-shifted full-bridge converters system is derived. Then, the influence of load power and the number of parallel IPOS phase-shifted full-bridge converters on the system stability is analyzed via eigenvalue analysis, and an optimal control strategy based on a particle swarm optimization algorithm is proposed. The control parameters are optimized for the parallel system of eight IPOS phase-shifted full-bridge converters. Finally, the above results are simulated to verify the accuracy of the stability analysis and the feasibility of the optimized control strategy. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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21 pages, 11376 KiB  
Article
Analysis of Electromagnetic Interference for Anti-Medal UHF RFID Temperature Tag in High Power Electronic Equipment
by Jian Liang, Zhuomin Zhou, Zhenfeng Xiao, Haotian Liu, Zhiqiang Lu, Li Su, Wei Guo and Xiangtian Deng
Electronics 2023, 12(17), 3577; https://doi.org/10.3390/electronics12173577 - 24 Aug 2023
Cited by 3 | Viewed by 1289
Abstract
Being inches from the rapid development of new energy technology, the capacity of high-power power electronic equipment is increasing rapidly, and the requirements for its safe and reliable operation are also rising. As a result, the demand for online temperature monitoring of such [...] Read more.
Being inches from the rapid development of new energy technology, the capacity of high-power power electronic equipment is increasing rapidly, and the requirements for its safe and reliable operation are also rising. As a result, the demand for online temperature monitoring of such equipment is becoming increasingly urgent. RFID temperature measurement technology can be used for real-time monitoring of the temperature of powered operation equipment. However, the operation of high-power electronic equipment generates strong electromagnetic interference, which can seriously affect the normal operation of RFID temperature measurement systems. For applications involving the internal temperature measurement of high-power power electronic equipment, this paper employs an RFID anti-metal temperature tag antenna with a short-circuit cutoff structure. This structure was tested in an excitation switchgear cabinet. During the low-power operation of the cabinet, the temperature tag functioned normally. By combining an RFID antenna model with an electromagnetic interference simulation model of the main circuit of the excitation switchgear cabinet, this paper establishes an electromagnetic interference simulation model for an RFID temperature tag. It analyzes how the tag’s antenna performance parameters change when subjected to interference. Through simulation, the failure mechanism of the RFID temperature tag during the high-power operation of the excitation switchgear cabinet is clarified. The analysis found that there are both conductive electromagnetic interference and radiated electromagnetic interference in the excitation switchgear cabinet, with the conductive electromagnetic interference having a more significant effect. Conductive electromagnetic interference can seriously impact the performance of RFID temperature tags in the excitation switchgear cabinet, significantly degrading their performance. In contrast, the effect of radiated electromagnetic interference on the tags is relatively small. Therefore, this paper employs anti-metal RFID temperature tags and simulates and analyzes their electromagnetic interference characteristics. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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16 pages, 6918 KiB  
Article
PCB Rogowski Coils for Capacitors Current Measurement in System Stability Enhancement
by Xuxin Yue, Guorong Zhu, Jing V. Wang, Xiangtian Deng and Qian Wang
Electronics 2023, 12(5), 1099; https://doi.org/10.3390/electronics12051099 - 23 Feb 2023
Cited by 3 | Viewed by 3203
Abstract
In terms of high-current measurement of capacitors, PCB Rogowski coils have attracted much attention because of their small size and easy installation. However, they are vulnerable to electromagnetic interference. In order to improve the immunity of the coil, this paper studies the influence [...] Read more.
In terms of high-current measurement of capacitors, PCB Rogowski coils have attracted much attention because of their small size and easy installation. However, they are vulnerable to electromagnetic interference. In order to improve the immunity of the coil, this paper studies the influence of the structure and parameter changes of the double-layer PCB coil on the measurement accuracy of mutual inductance. By testing the frequency response of four common coil structures, a differential winding coil structure is proposed. Based on the measurement of large capacitance current, the influence of non-electrical parameters of coils on the measurement accuracy of mutual inductance is experimentally verified. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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14 pages, 8174 KiB  
Article
Development of an Enhanced Selective Harmonic Elimination for a Single-Phase Multilevel Inverter with Staircase Modulation
by Govind S., Anilkumar Chappa, K. Dhananjay Rao, Subhojit Dawn and Taha Selim Ustun
Electronics 2022, 11(23), 3902; https://doi.org/10.3390/electronics11233902 - 25 Nov 2022
Cited by 5 | Viewed by 1802
Abstract
A low device switching frequency is recommended for the operation of multilevel inverters (MLIs) to achieve reduced switching losses. Selective harmonic elimination (SHE) and total harmonic distortion (THD) minimization are the two primary switching angle estimation methodologies for low-frequency modulation control. In this [...] Read more.
A low device switching frequency is recommended for the operation of multilevel inverters (MLIs) to achieve reduced switching losses. Selective harmonic elimination (SHE) and total harmonic distortion (THD) minimization are the two primary switching angle estimation methodologies for low-frequency modulation control. In this regard, a new generalized condition has been developed in this paper for the SHE technique. This original condition will give an output voltage with improved THD in comparison to the conventional SHE technique, while achieving its primary objective of eliminating the specific harmonic content from the output voltage. The proposed condition has been formulated by estimating the error associated with the staircase waveform and the desired sinusoidal output at the fundamental frequency. An infinite harmonic count has been considered for the evaluation of the quality of output, to obtain an accurate THD value without any underestimation. The proposed technique is analyzed, and its critical features are studied in Simulink. The effectiveness of the present work has been also validated by the experimental results. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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17 pages, 624 KiB  
Article
Power and Energy Applications Based on Quantum Computing: The Possible Potentials of Grover’s Algorithm
by Mohammad Reza Habibi, Saeed Golestan, Ali Soltanmanesh, Josep M. Guerrero and Juan C. Vasquez
Electronics 2022, 11(18), 2919; https://doi.org/10.3390/electronics11182919 - 15 Sep 2022
Cited by 8 | Viewed by 3186
Abstract
In quantum computing, calculations are achieved using quantum mechanics. Typically, two main phenomena of quantum mechanics (i.e., superposition and entanglement) allow quantum computing to solve some problems more efficiently than classical algorithms. The most well-known advantage of quantum computing is the speedup of [...] Read more.
In quantum computing, calculations are achieved using quantum mechanics. Typically, two main phenomena of quantum mechanics (i.e., superposition and entanglement) allow quantum computing to solve some problems more efficiently than classical algorithms. The most well-known advantage of quantum computing is the speedup of some of the calculations, which have been performed before by classical applications. Scientists and engineers are attempting to use quantum computing in different fields of science, e.g., drug discovery, chemistry, computer science, etc. However, there are few attempts to use quantum computing in power and energy applications. This paper tries to highlight this gap by discussing one of the most famous quantum computing algorithms (i.e., Grover’s algorithm) and discussing the potential applications of this algorithm in power and energy systems, which can serve as one of the starting points for using Grover’s algorithm in power and energy systems. Full article
(This article belongs to the Special Issue Power Quality Conditioning and Stability Enhancement of More-Electronics Power Systems, 2nd Edition)
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