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Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary

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

Deadline for manuscript submissions: 27 June 2024 | Viewed by 4846

Special Issue Editor

Dr. Ying Xu

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: superconducting power device; high-temperature superconducting magnets and applications; electrical engineering technology; electromagnetic technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Huazhong University of Science and Technology (HUST) was founded in 1952. It is a comprehensive research university located in Wuhan, China, under the direct supervision of the Ministry of Education. It is a participant university of the former “985” Project in China and also one of the first universities approved under the national "Double First-Class" Initiative, China’s “Excellence Initiative” for institutions of higher education. The HUST has consistently ranked among the top 10 universities in China in the major domestic and international rankings, including the Shanghai Ranking’s Academic Ranking of World Universities and the US News and World Report Best Global Universities Ranking.

To celebrate the 70th anniversary of the HUST, Energies will publish this Special Issue, entitled “Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary”. This Special Issue will collect high-quality full research articles or comprehensive literature reviews with the broad scope of electrical engineering technologies.

Dr. Ying Xu
Guest Editor

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

  • electrical engineering
  • applied superconductivity
  • electrotechnical and electromagnetic technology

Published Papers (4 papers)

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Research

14 pages, 7080 KiB  
Article
Research on Voltage Compensation Methods and Optimization Algorithm for Insulated Core Transformer High-Voltage Power Supply
by Lei Yang, Xialing Liu and Jun Yang
Energies 2024, 17(3), 547; https://doi.org/10.3390/en17030547 - 23 Jan 2024
Viewed by 570
Abstract
The insulated core transformer (ICT) power supply is widely employed in electron beam accelerators (EBAs) due to its high power, heightened efficiency, and stable operation. However, the segmented-core structure of the ICT power supply increases magnetic leakage, which leads to it adversely affecting [...] Read more.
The insulated core transformer (ICT) power supply is widely employed in electron beam accelerators (EBAs) due to its high power, heightened efficiency, and stable operation. However, the segmented-core structure of the ICT power supply increases magnetic leakage, which leads to it adversely affecting the consistency of the output voltages in the rectifier stages. Currently, numerous studies focus on stage voltage compensation, including turns compensation, capacitor compensation, dummy primary winding compensation, and full-parameter compensation. This paper presents a unified simulation model and an improved gradient-based genetic algorithm, which can also optimize the parameters of the four compensation methods. Based on this, the performance of the power supply using the four compensation methods under different ICT energy levels and power supply requirements is studied, and the selection suggestions are given. This work fills the gap in the performance comparison and application research of various compensation methods. Full article
(This article belongs to the Special Issue Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary)
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17 pages, 12490 KiB  
Article
A FEM-Based Comparative Study of the Effect of Rotor Bar Designs on the Performance of Squirrel Cage Induction Motors
by Cemil Ocak
Energies 2023, 16(16), 6047; https://doi.org/10.3390/en16166047 - 18 Aug 2023
Cited by 2 | Viewed by 1057
Abstract
Induction motors (IM) are the most frequently used type of motor in the industry. The number of rotor slots, bar geometry, and conductivity of bar material have a strong impact on the torque profile and efficiency characteristics of induction motors. This study focused [...] Read more.
Induction motors (IM) are the most frequently used type of motor in the industry. The number of rotor slots, bar geometry, and conductivity of bar material have a strong impact on the torque profile and efficiency characteristics of induction motors. This study focused on investigating the effect of different rotor bar designs on motor performance by the finite element method (FEM). The IMs have been designed using the same stator core, winding, and core lengths. The total rotor bar cross-section areas are also fixed throughout all designs. In addition to the change in the number of rotor bars and geometry, the effect of copper and aluminum bar materials on motor performance was also investigated, both for single and double-layered squirrel-cage structures. The results of the study indicate that the starting torque of the motor in a 36/30-slot aluminum single-cage structure was obtained as 96.26 Nm, while the starting torque of a 36/46-slot aluminum double-cage structure was found to be 115.34 Nm. It is also found that the starting torque of the initial design can be increased by up to 19.82% by changing only the rotor bar numbers and material with the same stator and rotor size. The efficiency of the motors was determined as 86.6% for both designs. In addition to efficiency, the output torque ripple has been decreased to 2.63, which equals a 67.32% decrease in the ripple of the initial design. The improved design has an approximately 8 °C lower T2 due to better cooling performance as a result of a higher number of rotor slots. Full article
(This article belongs to the Special Issue Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary)
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14 pages, 4544 KiB  
Article
Optimum Design and Performance Analysis of Superconducting Cable with Different Conductor Layout
by Sisi Peng, Chuanbing Cai, Jiaqi Cai, Jun Zheng and Difan Zhou
Energies 2022, 15(23), 8893; https://doi.org/10.3390/en15238893 - 24 Nov 2022
Cited by 2 | Viewed by 1216
Abstract
Compared with the traditional cable, the high-temperature superconducting (HTS) cable has the advantages of low loss and large capacity transmission. At present, the research on HTS cables mainly focuses on the calculation of AC loss, the performance under specific working conditions and cooling [...] Read more.
Compared with the traditional cable, the high-temperature superconducting (HTS) cable has the advantages of low loss and large capacity transmission. At present, the research on HTS cables mainly focuses on the calculation of AC loss, the performance under specific working conditions and cooling system design. Relatively little research has been carried out on the basic design and overall layout optimization of the cables. In this paper, an HTS cable with a rated current of 4 kA was designed. Firstly, according to the selected superconducting cable parameters, the body design of cables with different structures was carried out and the corresponding finite element models were built. Then, the performance analysis of HTS cables with different layouts was carried out based on the proposed cable performance evaluation indicators and the CORC double-layer structure was determined as the scheme of this cable. Finally, the AC loss of the cable with this topology was calculated to be 9.81 J/m under rated conditions. The cooling system can ensure the safe operation of the cable in the rated temperature range. Full article
(This article belongs to the Special Issue Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary)
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20 pages, 24604 KiB  
Article
Short-Term Electricity Price Forecasting Based on the Two-Layer VMD Decomposition Technique and SSA-LSTM
by Fang Guo, Shangyun Deng, Weijia Zheng, An Wen, Jinfeng Du, Guangshan Huang and Ruiyang Wang
Energies 2022, 15(22), 8445; https://doi.org/10.3390/en15228445 - 11 Nov 2022
Cited by 5 | Viewed by 1294
Abstract
Accurate electricity price forecasting (EPF) can provide a necessary basis for market decision making by power market participants to reduce the operating cost of the power system and ensure the system’s stable operation. To address the characteristics of high frequency, strong nonlinearity, and [...] Read more.
Accurate electricity price forecasting (EPF) can provide a necessary basis for market decision making by power market participants to reduce the operating cost of the power system and ensure the system’s stable operation. To address the characteristics of high frequency, strong nonlinearity, and high volatility of electricity prices, this paper proposes a short-term electricity price forecasting model based on a two-layer variational modal decomposition (VMD) technique, using the sparrow search algorithm (SSA) to optimize the long and short-term memory network (LSTM). The original electricity price sequence is decomposed into multiple modal components using VMD. Then, each piece is predicted separately using an SSA-optimized LSTM. For the element with the worst prediction accuracy, IMF-worst is decomposed for a second time using VMD to explore the price characteristics further. Finally, the prediction results of each modal component are reconstructed to obtain the final prediction results. To verify the validity and accuracy of the proposed model, this paper uses data from three electricity markets, Australia, Spain, and France, for validation analysis. The experimental results show that the proposed model has MAPE of 0.39%, 1.58%, and 0.95%, RMSE of 0.25, 0.9, and 0.3, and MAE of 0.19, 0.68, and 0.31 in three different cases, indicating that the proposed model can well handle the nonlinear and non-stationarity characteristics of the electricity price series and has superior forecasting performance. Full article
(This article belongs to the Special Issue Electrical Engineering Technology in Huazhong University of Science and Technology: Celebrating the 70th Anniversary)
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