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Power-Electronic-Based Smart Grid and Its Control Technology
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Power-Electronic-Based Smart Grid and Its Control Technology

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

Deadline for manuscript submissions: closed (15 August 2024) | Viewed by 3700

Special Issue Editors

Dr. Wenjie Liu

E-Mail Website
Guest Editor
School of Automation, Northwestern Polytechnical University, Xi'an 710072, China
Interests: smart microgrid; renewable energy generation system; fault-tolerant control; energy storage system; prognostics and health management (PHM)
Special Issues, Collections and Topics in MDPI journals
Dr. Haitao Zhang

E-Mail Website
Guest Editor
School of Electrical Engineering, Xi'an Jiaotong University, Xi’an 710049, China
Interests: stability analysis and control of AC/DC hybrid systems; new energy grid-connected system
Dr. Qiao Peng

E-Mail Website
Guest Editor
College of Electrical Engineering, Sichuan University, Chengdu 610065, China
Interests: power system stability and control; renewable power generation; grid-connected energy storage system control; flexible DC power transmission
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Weilin Li

E-Mail Website
Guest Editor
School of Automation, Northwestern Polytechnical University, Xi’an 710129, China
Interests: intelligent microgrid and new energy; aviation intelligent distribution technology; electric propulsion aircraft; multidisciplinary integrated simulation

Special Issue Information

Dear Colleagues,

We are inviting submissions to a Special Issue of Electronics in the subject area of “Power-Electronic-Based Smart Grid and Its Control Technology”.

The smart grid comprises an energy-generation, transmission, and distribution network and control units enhanced by digital control, monitoring, and telecommunications capabilities. Progress in power electronics technologies and modern control methods has enabled the smart grid towards new kinds of power-electronic-based grid operation, which can achieve almost all the needs of the smart grid for better power quality, reliability, and resilience. On the other hand, the high penetrations of power electronics converters and renewable energy in smart grids complicate the control process, e.g., addressing low inertia and lower stability issues. Thus, this Special Issue focuses on power-electronic-based smart grid, hybrid power systems with high-penetrated renewable energy and energy storage systems, stability analysis, and control technology for a sustainable future. Prospective authors are invited to submit original contributions or survey papers for publication in Electronics. Topics of interest for this Special Issue include, but are not limited to, the following topics in the field of power-electronic-based smart grid and its control technology:

  • Renewable energy and storage system integration;
  • Hybrid power supply systems;
  • Power-electronic-based smart grids;
  • Energy harvesting systems;
  • Advances in power converters and control technologies;
  • System stability analysis and optimization;
  • Frequency fluctuations and control strategies;
  • Dynamics power distribution technology;
  • Reactive power compensation.

Dr. Wenjie Liu
Dr. Haitao Zhang
Dr. Qiao Peng
Prof. Dr. Weilin Li
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. 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 electronics
  • smart grids
  • hybrid power supply systems
  • renewable energy sources
  • energy storage systems
  • intelligent distribution technology
  • grid-connected system stability
  • fault-tolerant control
  • frequency stability analysis and control
  • grid-forming and grid-following systems

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Published Papers (5 papers)

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Research

17 pages, 4501 KiB  
Article
Digital Twin for Modern Distribution Networks by Improved State Estimation with Consideration of Bad Date Identification
by Huiqiang Zhi, Rui Mao, Longfei Hao, Xiao Chang, Xiangyu Guo and Liang Ji
Electronics 2024, 13(18), 3613; https://doi.org/10.3390/electronics13183613 - 11 Sep 2024
Viewed by 668
Abstract
With the rapid development of modern power systems, the structure and operation of distribution networks are becoming increasingly complex, demanding higher levels of intelligence and digitization. Digital twin, as a virtual cutting-edge technique, can effectively reflect the operational status of distribution networks, offering [...] Read more.
With the rapid development of modern power systems, the structure and operation of distribution networks are becoming increasingly complex, demanding higher levels of intelligence and digitization. Digital twin, as a virtual cutting-edge technique, can effectively reflect the operational status of distribution networks, offering new possibilities for real-time monitoring, optimization and other functions for distribution networks. Building efficient and accurate models is the foundation of enabling a digital twin of distribution networks. This paper proposes a digital twin operating system for distribution networks with renewable energy based on robust state estimation and deep learning-based renewable energy prediction. Furthermore, the identification and correction of possible bad or missing data based on deep learning are also included to purify the input data for the digital twin system. A digital twin test platform is also proposed in the paper. A case study and evaluations based on a real-time digital simulator are carried out to verify the accuracy and real-time performance of the established digital twin system. In general, the proposed method can provide the basis and foundation for distribution network management and operation, as well as intelligent power system operation. Full article
(This article belongs to the Special Issue Power-Electronic-Based Smart Grid and Its Control Technology)
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17 pages, 8363 KiB  
Article
Dynamic Current-Limitation Strategy of Grid-Forming Inverters Based on SR Latches
by Huajie Zhang, Junpeng Ma and Xiaopeng Li
Electronics 2024, 13(17), 3432; https://doi.org/10.3390/electronics13173432 - 29 Aug 2024
Viewed by 714
Abstract
A grid-forming (GFM) inverter can effectively support active power and reactive power, and the stability problem induced by the low inertia can be thereby alleviated in a power electronics-dominated power system. Yet, the voltage source characteristic presented by the grid-forming inverter induces an [...] Read more.
A grid-forming (GFM) inverter can effectively support active power and reactive power, and the stability problem induced by the low inertia can be thereby alleviated in a power electronics-dominated power system. Yet, the voltage source characteristic presented by the grid-forming inverter induces an overcurrent problem during a short-circuit fault. Furthermore, the time delay induces an inrush current in traditional digital control, triggered by a predefined timing sequence. To address the overcurrent problem of the GFM inverter controlled by the digital controller, the operation characteristics of GFM inverters under grid-voltage drops are investigated, and a mathematical model of the instantaneous fault current is established, which depicts the relationship between the instantaneous fault current’s magnitude, grid-voltage drop severity, equivalent output impedance, and current inner-loop response speed. Then, a Set–Reset (SR) latch-based dynamic current limitation with event-triggered control is proposed for the low-voltage ride-through of the GFM inverter. In the proposed method, the current limitation is enabled during grid fault, and the active and reactive powers can be recovered rapidly after fault clearance. Meanwhile, the active and reactive power references are designed to enhance synchronization stability during the grid fault. The proposed method addresses the issue of the repeated switching of virtual impedance during grid fault and achieves rapid power recovery after fault clearance. In addition, the proposed method uses the logic of event triggers to respond to the overcurrent event in real time and realize overcurrent protection. The simulation and experimental results demonstrate the effectiveness of the proposed method in current limitation and active-power recovery after fault clearance. Full article
(This article belongs to the Special Issue Power-Electronic-Based Smart Grid and Its Control Technology)
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15 pages, 38015 KiB  
Article
Transient Synchronization Stability Analysis and Enhancement Control for Power Self-Synchronization Control Converters
by Huabo Shi, Peng Shi, Bo Zhou, Xi Wang, Xueyang Zeng and Junpeng Ma
Electronics 2024, 13(17), 3416; https://doi.org/10.3390/electronics13173416 - 28 Aug 2024
Viewed by 557
Abstract
Conventional grid-forming control often destabilizes voltage source converters (VSCs) in stiff grids, and transient synchronization instability will occur in the grid fault condition. Therefore, power self-synchronization control (PSSC) is first introduced for enhancing the small-signal stability of grid-forming control in the case of [...] Read more.
Conventional grid-forming control often destabilizes voltage source converters (VSCs) in stiff grids, and transient synchronization instability will occur in the grid fault condition. Therefore, power self-synchronization control (PSSC) is first introduced for enhancing the small-signal stability of grid-forming control in the case of a short circuit ratio ranging from 1 to infinity. Meanwhile, the transient synchronization instability for the grid-forming converter with PSSC in the grid fault condition is analyzed by the phase portrait, and a transient stability enhancement control (TSEC) scheme is combined with a PSSC-based VSC, which can efficiently eliminate the risk of losing synchronization in the arbitrary SCR. Finally, experimental results are provided to confirm the theoretical analysis. Full article
(This article belongs to the Special Issue Power-Electronic-Based Smart Grid and Its Control Technology)
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16 pages, 6954 KiB  
Article
Frequency Support Coordinated Control Strategy of Renewable Distributed Energy Resource Based on Digital Twins
by Xiao Chang, Xiangyu Guo, Jinhao Wang, Huiqiang Zhi, Longfei Hao and Liang Ji
Electronics 2024, 13(17), 3403; https://doi.org/10.3390/electronics13173403 - 27 Aug 2024
Viewed by 488
Abstract
The integration of high-penetration renewable energy sources is playing an increasingly important role in the frequency regulation of the power system. However, due to the varying output characteristics and response speeds of different renewable distributed energy resources (DERs), the overall response from the [...] Read more.
The integration of high-penetration renewable energy sources is playing an increasingly important role in the frequency regulation of the power system. However, due to the varying output characteristics and response speeds of different renewable distributed energy resources (DERs), the overall response from the collective output of these distributed energy resources may not meet expected requirements and could have adverse effects on the grid. One drawback of traditional distributed coordinated control is its high communication requirements. This paper proposes using digital twin (DT) technology for the coordinated control of distributed energy resources, which can minimize the communication needs between various distributed energy resources while achieving coordinated control. Verification of the frequency support coordinated control strategy based on digital twin technology shows that it can effectively enhance the individual output characteristics and overall response of each distributed energy resource, providing effective support for grid frequency. Full article
(This article belongs to the Special Issue Power-Electronic-Based Smart Grid and Its Control Technology)
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20 pages, 12480 KiB  
Article
Quantifying the Inverter-Interfaced Renewable Energy Critical Integration Capacity of a Power Grid Based on Short-Circuit Current Over-Limits Probability
by Weiyan Qian, Ruixuan Zhang, Yao Zou, Niancheng Zhou, Qianggang Wang and Ting Yang
Electronics 2024, 13(8), 1486; https://doi.org/10.3390/electronics13081486 - 14 Apr 2024
Cited by 1 | Viewed by 725
Abstract
Power systems with a high proportion of inverter-based sources like photovoltaics require a substantial short-circuit current ratio to ensure strong voltage support capabilities. However, this also increases the system’s short-circuit current capacity and levels, which may potentially affect the safe operation of system [...] Read more.
Power systems with a high proportion of inverter-based sources like photovoltaics require a substantial short-circuit current ratio to ensure strong voltage support capabilities. However, this also increases the system’s short-circuit current capacity and levels, which may potentially affect the safe operation of system equipment and current-carrying conductors. To evaluate the operational risks, this paper proposes a quantitative calculation model for the critical integration proportion of grid-connected inverter-interfaced power sources based on short-circuit current over-limit probability. Firstly, according to the verification criterion about short-circuit current during the selection of the switching equipment and conductors in the power system, the short-circuit current over-limit probability evaluation system with five indices is established. Secondly, considering the impact of the increased grid integration proportion of inverter-based power sources on short-circuit currents, an evaluation process for operational risk probabilities is proposed. Based on this, the critical access proportion for inverter-based power source integration in the power grid can be calculated. Finally, the proposed model is used to assess the operational risk probability for a 220 kV system which includes a high proportion of inverter-based power sources in the Anhui area, China. Through the analysis of cumulative probability distribution curves, the critical grid integration proportion interval for the transition from normal to high proportion stages of inverter-based power sources is determined. Full article
(This article belongs to the Special Issue Power-Electronic-Based Smart Grid and Its Control Technology)
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