Article
Energy & Fuels
Slawomir Kozak
Summary: The author designed, built, and tested a superconducting fault current limiter (SFCL) for medium voltage networks cooled by a cryocooler. The limiter uses high-temperature second generation superconducting tape and the working temperature can be changed to adjust to electric power needs. Transition from a SFCL to a superconducting surge current limiter (SSCL) system was proposed, showing advantages in reducing operation time and adapting to power industry applications.
Article
Computer Science, Information Systems
Wei Chen, Peng Song, Hao Jiang, Jiahui Zhu, Shengnan Zou, Timing Qu
Summary: This study measured the quench recovery time of an HTS tape under different fault current conditions, developed a global heat transfer model to describe the quench recovery characteristic, validated its effectiveness, and discussed the influence of tape properties on the quench recovery time.
Article
Materials Science, Multidisciplinary
Chunjiang Guo, Xin Yu, Yue Wu, Dean Liu, Mengru Zhao, Wei Wu, Jiamin Zhu, Zhijian Jin, Yue Zhao
Summary: This study tested the aging of copper stabilizers on second-generation high-temperature superconducting tapes, finding that aging increased the surface contact resistivity and decreased the purity of the copper stabilizer. The study also identified Cu2O as the main product on the tape surface during reactions with oxygen and water vapor.
MATERIALS CHARACTERIZATION
(2023)
Article
Energy & Fuels
Sisi Peng, Chuanbing Cai, Jiaqi Cai, Jun Zheng, Difan Zhou
Summary: This paper focuses on the design and layout optimization of high-temperature superconducting (HTS) cables. Finite element models were built for cables with different structures, and their performance was analyzed using cable performance evaluation indicators. The CORC double-layer structure was determined as the best solution. The AC loss of the cable and the performance of the cooling system were calculated and found to be satisfactory.
Article
Physics, Applied
Junlin Zhong, Shengnan Zou, Lingfeng Lai, Pengrong Chen, Shutong Deng
Summary: As civilization develops, the demand for energy is increasing. Superconductors offer numerous advantages over traditional conductors and are being explored as a means to meet the energy demand. Researchers have developed a computational model, known as the J model, for estimating the critical current of high-temperature superconducting (HTS) coils. The study demonstrates that this method is efficient and can improve computational efficiency, particularly for HTS circular coils.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Computer Science, Information Systems
Boyang Shen, Mingshun Zhang, Xingming Bian, Xiaoyuan Chen, Lin Fu
Summary: This article investigates the optimization of energy efficiency for the dynamic voltage in a high-temperature superconducting tape under different working conditions. By validating the mechanics of superconducting dynamic voltage and performing in-depth modeling and optimization, the optimal operating conditions of the tape were discovered. The novel conceptualization and optimization approaches in this study are significant for the design and optimization of superconducting energy/power applications.
Article
Chemistry, Physical
Wafa Ali Soomro, Youguang Guo, Haiyan Lu, Jianxun Jin, Boyang Shen, Jianguo Zhu
Summary: High-temperature superconductor (HTS) bulks have shown great potential for industrial and commercial applications due to their ability to trap larger magnetic fields compared to conventional permanent magnets. Previous research on the electromagnetic properties of HTS focused solely on the AC magnetic fields and the associated AC loss. This paper provides a comprehensive examination of the AC loss measurement under various conditions, comparing the results to the finite element-based H-formulation. The findings offer insights into material characterization that will be valuable for the design of future large-scale HTS applications.
Article
Engineering, Electrical & Electronic
Christoph Utschick, Cem Som, Jan Souc, Veit Grosse, Fedor Gomory, Rudolf Gross
Summary: This article presents a wireless power transfer system based on high-temperature superconducting coils, which exceeds the power density of most conventional systems and achieves a dc-to-dc efficiency above 97% at 6 kW output power. The analytical and numerical simulations of the ac loss in the HTS coils, considering hysteresis and eddy current contributions, are discussed, and the results are validated by experimental measurements. Experimental results of the full system performance at different frequencies and load conditions are also presented.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Engineering, Electrical & Electronic
J. Ogawa, S. Fukui, R. Iida, T. Obana
Summary: Based on previous studies, the AC loss characteristics of each layer in a high-temperature superconducting cable were experimentally investigated. A model was developed to estimate the AC loss by considering the maximum and minimum values of the loss, showing good agreement with experimental data. This model allows for estimating AC losses and designing the minimum AC loss load for a superconducting cable, specifically a three-layer twisted HTS cable.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Wei Pi, Yansen Ou, Yuantong Ma, Binyi Tian, Qingmei Shi, Yinshun Wang, Jin Dong
Summary: This paper focuses on the current distribution and AC loss of BSCCO/REBCO hybrid tapes, establishing a one-dimensional model to calculate their performance under AC operating current. Results show good agreement between numerical and experimental results, and the proposed method is effective for analyzing hybrid tapes.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Physics, Applied
Guanjie Liu, Guomin Zhang, Guole Liu, Liwei Jing, Haonan Wang
Summary: This study investigated the operation and loss characteristics of high-frequency superconducting air-core transformers made of YBCO tapes. The results showed significant differences in operating characteristics compared to conventional transformers, with strong frequency and power dependence. These findings can serve as a theoretical basis for the design of high-frequency resonant transformers.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
Lina Wang, Jun Liu, Dong Sun, Wei Li, Hongguang Xu
Summary: This paper proposes two hybrid HTS current sharing optimization algorithms based on particle swarm optimization and artificial bee colonies to improve the transmission performance of superconducting cables. The current distribution and structure parameters of the HTS cable before and after optimization are estimated, and a 3D model is established to evaluate the characteristics of the optimized cable. The results demonstrate that the proposed hybrid current sharing optimization schemes effectively improve the inner current sharing of the HTS cable.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2023)
Article
Automation & Control Systems
Xinggang Fan, Dawei Li, Wubin Kong, Longfei Cao, Ronghai Qu, Zhouping Yin
Summary: This article investigates the complex slot leakage magnetic field and the strand eddy current loss in windings of inverter-fed electrical machines. It shows that the magnetic saturation and the pulsewidth modulation (PWM) harmonics could have a significant influence on the slot leakage magnetic field, and thus may influence the eddy current loss. To consider these effects while reducing the computation burden, a semianalytical strand eddy current loss calculation method is proposed based on the slot leakage field calculation by a two-dimensional (2-D) magnetostatic finite-element method (FEM) and a 2-D analytical high-frequency eddy current loss expression.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Mohammad Yazdani-Asrami, Wenjuan Song, Min Zhang, Weijia Yuan, Xiaoze Pei
Summary: This study investigated the effect of different phase angles and amplitudes of magnetic field harmonics on the magnetization loss of high temperature superconducting coated conductors (CCs), finding that the phase angle of the field harmonic has a significant impact on the magnetization loss.
Article
Energy & Fuels
Giacomo Russo, Antonio Morandi
Summary: High Temperature Superconducting (HTS) dynamo flux pumps are a promising alternative to metal current leads for energization and the persistent current mode operation of high current DC superconducting magnet systems. This paper evaluates and compares the performance of several commercial HTS tapes used for flux pumping purposes through numerical simulation, and investigates the dependence of the flux pump's performance on the operating temperatures.
Article
Thermodynamics
Guanzheng Li, Bin Li, Chao Li, Shuai Wang
Summary: This paper proposes a novel two-stage SOH estimation method that can flexibly, rapidly, and robustly estimate the state of health (SOH) of lithium-ion batteries. The method uses voltage profiles and aging features in the first stage, and introduces a stacking ensemble model and Shapley additive explanation approach in the second stage. Experimental results demonstrate that the proposed model outperforms conventional machine learning models in terms of accuracy and robustness.
Article
Chemistry, Physical
Wafa Ali Soomro, Youguang Guo, Haiyan Lu, Jianxun Jin, Boyang Shen, Jianguo Zhu
Summary: High-temperature superconductor (HTS) bulks have shown great potential for industrial and commercial applications due to their ability to trap larger magnetic fields compared to conventional permanent magnets. Previous research on the electromagnetic properties of HTS focused solely on the AC magnetic fields and the associated AC loss. This paper provides a comprehensive examination of the AC loss measurement under various conditions, comparing the results to the finite element-based H-formulation. The findings offer insights into material characterization that will be valuable for the design of future large-scale HTS applications.
Article
Energy & Fuels
Yu Chen, Juan Feng, Rui Liu, Jingyu Chen, Zhaomin Jiang, Chengbiao Yu, Xiaoyuan Chen, Boyang Shen, Lin Fu
Summary: This article investigates a new hybrid photovoltaic-liquid air energy storage (PV-LAES) system to provide solutions for low-carbon transition. The system utilizes a local PV power plant with maximum power point tracking to generate low-carbon electricity, and an air-based LAES unit to absorb surplus power from the PV plant and compensate power for the local load. The results show significant reduction in grid power demand, savings in power, and reduction in carbon emissions.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Xiaoyuan Chen, Qiang Li, Shan Jiang, Mingshun Zhang, Lin Fu, Boyang Shen
Summary: This paper presents a new combo-transmission technology that simultaneously delivers cold energy and electricity to the aluminium profile extrusion line. The use of a powerful superconducting cable allows for virtually zero loss and compact size, with the cable cooled by liquid nitrogen. The simulation results show that the total energy loss of superconducting transmission is about 46% of conventional copper cable, resulting in significant energy savings.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Jinxin Yue, Juan Feng, Jingyu Chen, Rui Liu, Chengbiao Yu, Zhaomin Jiang, Xiaoyuan Chen, Boyang Shen, Lin Fu
Summary: This paper investigates a new multistage cold energy recovery/utilization system that links the cold energy from liquefied natural gas (LNG) to supply coastal cold stores efficiently. The proposed system has advantages in terms of technology, economy, and environmental benefits, saving energy and reducing carbon emissions.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Engineering, Marine
Yupeng Yuan, Xiaoyu Wang, Liang Tong, Rui Yang, Boyang Shen
Summary: This study classified the navigation environment between Wuhan and Shanghai in China using an improved K-means algorithm and established a fuel consumption prediction model considering navigation environment factors. Speed optimization models with multiple different optimization objectives were constructed and tested based on an artificial fish swarm algorithm. Sensitivity analysis focused on navigation time, fuel price, charter rate, free carbon credits, and carbon tax rate. The results showed that optimization could reduce total shipping cost and CO2 emissions by 0.94% and 0.38% respectively. With a carbon tax policy, the optimized result was close to the compromised solution of multi-objective optimization, providing a useful reference for policymakers.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Chao Li, Gengyao Li, Ying Xin, Bin Li
Summary: In this study, a novel dc conversion device using variable superconducting inductor is proposed to adjust the operating current of closed HTS coils flexibly and efficiently. Experimental results demonstrate that the proposed device can tune the current in a wide range with little power loss. Simulation tests further explore the working details and application potential. Besides adjusting the current, the device can also compensate field decay of the HTS magnets caused by joint resistance or external field.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Electrical & Electronic
Luning Hao, Jintao Hu, Haigening Wei, Qi Wang, Mengyuan Tian, Ismail Patel, Adil Shah, Tim Coombs
Summary: The Roebel tape is a high-temperature superconducting wire with a multi-layer structure. It can effectively reduce AC losses by canceling the magnetic fields between adjacent layers. The study focuses on the AC losses of the Roebel tape and suggests increasing the distance between layer pairs or using double-layer stacks to reduce losses and improve current density.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
J. Ma, J. Hu, H. Xiao, X. Luo, Y. Xia, J. Geng, T. A. Coombs
Summary: The dynamic resistance effect introduces dissipative loss to type-II high Tc superconductors, but can also be effectively exploited in some cases. A high temperature superconducting (HTS) power switch, based on the dynamic resistance effect, has been developed and is a key component in the HTS transformer-rectifier flux pump (TRFP).
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Haigening Wei, Qi Wang, Luning Hao, Jintao Hu, Mengyuan Tian, Ismail Patel, Adil Shah, Tim Coombs
Summary: This research investigates substitutions for wider tapes in superconducting electrical machines. Different stack architectures and substrate materials are tested for their magnetizing effect using pulse field magnetization. Sectioned stacks are tested in a modified synchronous machine under liquid nitrogen conditions to explore the characteristics of trapped flux, magnetization, and demagnetization.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Chao Li, Shengjie Wang, Bin Li, Qi Wu, Jiahui Zhu, Hongjie Zhang, Ying Xin
Summary: With the rapid development of distribution system and the integration of distributed generations, the increasing fault current is threatening electrical equipment of the power grid. The superconducting fault current limiter (SFCL) is an effective solution to dealing with the large fault current in the distribution network. In this work, the characteristics and impacts of a flux-coupling SFCL on overcurrent protection for distribution system are analyzed, and a simulation model is built to verify the analysis.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Physics, Applied
Wenxin Li, Tianhui Yang, Chao Li, Gengyao Li, Ying Xin
Summary: Regenerative braking technology is becoming more attractive due to its energy recovery capabilities, with potential applications in urban rail transit. The new superconducting energy storage technology shows promise but requires further evaluation. Comparative studies show that the new technology offers high cycle efficiency, potentially revolutionizing regenerative braking and improving urban rail transportation systems.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Qi Wang, Hongye Zhang, Luning Hao, Jintao Hu, Haigening Wei, Ismail Patel, Adil Shah, Tim Coombs
Summary: This research presents a comprehensive and innovative method to investigate the magnetisation and cross-field demagnetisation behavior of high-temperature superconducting coated conductors in practical superconducting machines. The study introduces several novel contributions, including the exploration of harmonics interaction in a real electric machine environment involving coated conductors, and the investigation of magnetisation losses occurring in various layers. The research outcomes are anticipated to contribute to the advancement of superconducting machine technology.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Automation & Control Systems
Guanzheng Li, Bin Li, Chao Li, Kaidi Zeng, Shuai Wang, Peiyu Chen
Summary: This article proposes a novel probabilistic estimation method based on natural gradient boosting for solving the range anxiety challenge in electric vehicles. The results show that the estimated intervals can better contain the true values and provide richer information compared to deterministic estimation. The proposed method achieves better performance in deterministic estimation compared to existing methods.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Bin Li, Qi Wu, Chao Li, Yizhe Ou, Jiahui Zhu, Panpan Chen, Defu Wei, Ying Xin
Summary: This paper proposes a novel configuration approach for SFCLs, which utilizes the sensitivity factor to select the type of SFCL and the candidate transmission branches for installation. The optimal configuration of SFCLs is determined using particle swarm optimization with shrinkage factor and the Pareto principle. Economic analysis shows that SFCLs have promising application prospects in limiting fault currents and reducing network losses.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
