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Workshop on Predictive Control of Electrical Drives and Power Electronics (PRECEDE)

作者： Zeyang Long Zixin Li Shuanghong Wang School of Electric and Electronic Engineering Huazhong University of Science and Technology Wuhan China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Permanent-Magnet Synchronous Motor (PMSM) is widely used in the electric vehicle (EV) industry. Due to the instability and the cost of the position sensor, massive studies have been done to achieve the control without position sensor on PMSM. This paper analyzes the switching process from I/F strategy to Sliding Mode Observer (SMO) strategy in details, and also introduces the framework of I/F strategy with model predictive controller (MPC) as well as SMO used in the model. Furthermore, a new optimization algorithm called Angle Weighting Switching Strategy (AWSS) is proposed to smooth the transition process so as to mitigate the current-jitter and reduce speed fluctuation. Moreover, simulation between conventional switching method and the proposed method has been done to validate the effectiveness and robustness of the proposed control algorithm.

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Electronic Structure of a Co-Doped ZnO ${\bar{12}30)$Σ=7 Grain Boundary

Electronic Structure of a Co-Doped ZnO ${\bar{12}30)$Σ=7 G...

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Electrical engineering (CIYCEE), IEEE China International Youth Conference on

作者： Xiaoxuan Zhang Junjia He Li Song Benzheng Zhou State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (数字)9781665477321

ISBN: (纸本)9781665477338

The electronic properties of Co-doped Σ=7[0001] grain boundaries in ZnO were investigated using first-principles calculations due to the important role of Co in ZnO varistor ceramics. Grain boundary segregation calculations show that for Σ=7 grain boundaries, the driving force of Co segregation at grain boundaries is strong, and the segregation energy of interstitial filling is lower than that of grain boundary substitution. We obtain negative segregation energies at the two grain boundary sites, indicating that Co aggregates at the grain boundaries. The analysis of the band structure, electronic density of states and plane-averaged charge density shows that the pure Σ=7 grain boundary will lead to the generation of shallow-level acceptor states due to the breaking of bonds at the grain boundary, but it will not cause nonlinear I-V characteristics. Calculations for doping Σ=7 grain boundaries show that Co produces local impurity states at the grain boundaries and acts as a donor dopant, the conduction band intersects with the Feimi level, enhancing the grain boundary conductivity.

关键词： Grain boundaries Varistors II-VI semiconductor materials Impurities Schottky barriers Lattices Doping

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Robust superamphiphobic coatings with gradient and hierarchical architecture and excellent anti-flashover performances

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Nano Research 2022年第8期15卷 7565-7576页

作者： Yi Xie Wei Xiong Shefiu Kareem Chuxiong Qiu Yongfei Hu Ivan PParkin Shengwu Wang Huayun Wang Junwu Chen Lee Li Zhi Chen Huajun Sun Xiujian Zhao State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Department of Chemistry University College LondonLondon WC1H 0AJUK State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science&Technology) Wuhan 430074China State Grid Jiangxi Electric Power CompanyLtd.Electric Power Research InstituteNanchang 330096China Wuhan Shuneng New Material Co. LTDWuhan 430074China

Biomimetic superhydrophobic(SH)coatings have emerged as a promising alternative to traditional room temperature vulcanizing(RTV)silicone rubber coatings for improving the flashover strength of ***,organic contamination occurs in outdoor applications and thus a superamphiphobic(SAP)surface is more desirable but not yet reported for improving flashover ***,we developed a novel anti-flashover technique by fabricating robust SAP coating with unique gradient and micro-nanoscale hierarchical *** SAP coating was fabricated by sequentially spray-depositing a resin-based primer and a silica-based topcoat on substrates(i.e.,glass slides and insulators).The primer not only functions as an adhesive offering strong adhesion to the substrate but also offers a micromastoid-like structure facilitating the subsequent formation of hierarchical *** appropriate spraying pressure leads to a diffusion of the fluorocarbon-modified silica nanoparticles into the primer to form a unique gradient structure,by analogy to inserting bullets into a *** features render the SAP coating excellent robustness with strong abrasive resistance,excellent ultraviolet(UV)resistance,and excellent chemical and thermal *** flashover property of the SAP coating was explored and compared with that of SH and RTV specimens,from which a novel organic-contamination model to evaluate the flashover performance was *** coated SAP glass insulator demonstrated 42.9%pollution flashover voltage improvement than RTV-coated *** stated unique features reveal the convincing potential of the present SAP coatings to be applied for not only outdoor transmission line insulators for antiflashover but also other fields for self-cleaning,anti-fouling,and anti-icing.

关键词： superamphiphobic coatings superhydrophobic coatings insulator pollution flashover voltage anti-flashover

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Research on Capacity Configuration Method of Underwater Compressed Air Energy Storage Considering Offshore Wind Power

Research on Capacity Configuration Method of Underwater Comp...

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Energy engineering and Power Systems (EEPS), International Conference on

作者： Ming Shao Suhua Lou Yaowu Wu Yong Lin Weijie Wu Zhengmin Zuo Peiyu Liu Mingshan Mo State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Power grid planning research center of Guangdong power grid corporation Guangzhou China

ISBN: (数字)9798350366914

ISBN: (纸本)9798350366921

In order to cope with the challenges brought by the volatility and randomness of new energy output such as offshore wind power, underwater compressed air energy storage (UCAES) has been widely concerned and has broad development and application prospects. A capacity configuration model of underwater air compressor considering offshore wind power is presented in this paper. Firstly, the model of underwater compressed air energy storage and wind power output is established. Then, the capacity optimization configuration model of UCAES is constructed with the goal of optimal economic benefit. Finally, the model is analyzed according to the solving results, and the results show that the validity of the model is verified.

关键词： Economics Analytical models Insulation Atmospheric modeling Wind power generation Energy efficiency Power systems Isothermal processes Optimization Energy storage

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Design and Analysis of a Novel Miniaturized Ultra-Thin Wide-Band Metamaterial Absorber

Design and Analysis of a Novel Miniaturized Ultra-Thin Wide-...

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2023 International Applied Computational electromagnetics Society Symposium, ACES-China 2023

作者： Ma, Jingnan Li, Yan Li, Erping School of Electronics and Information Engineering Hebei University of Technology Tianjin China China Jiliang University Key Lab. of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province China Zhejiang China Zhejiang University Key Laboratory of Advanced Micro-Nano Electronic Device and Smart Systems and Applications Zhejiang China

ISBN: (纸本)9781733509657

The volume of existing metamaterial absorber (MMA) is not small enough to be applied in miniaturized devices such as chip level. To solve this problem, a miniaturized ultrathin wide-band MMA is proposed in this paper. The thickness of proposed MMA is 1.1mm with a absorption rate of 99.6% at 19.7GHz. This paper also analyzes the influence of parameters of the proposed MMA on the absorption performance and proves that it has a certain tunability of the absorption band. By comparing with other works, the MMA proposed in this paper realizes the miniaturization of the structure while ensuring ultra-wideband. This benefit offers a novel approach to address the problem of difficult loading electromagnetic shielding structures in miniaturized chip designs. © 2023 Applied Computational electromagnetics Society (ACES).

关键词： electromagnetic shielding

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Mitigation of the Instability of Ultrafast Li-Ion Conductor Li_(6.6)Si_(0.6)Sb_(0.4)S_(5)I Enables High-Performance All-Solid-State Batteries

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Renewables 2023年第2期1卷 266-276页

作者： Cong Liao Chuang Yu Shaoqing Chen Chaochao Wei Zhongkai Wu Shuai Chen Ziling Jiang Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074 School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074 Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055

Solid-state batteries with excellent safety and high energy density display great potential as next-generation energy storage ***,few solid electrolytes simultaneously possess high ionic conductivity and good chemical and electrochemical ***,pure argyrodite Li_(6.6)Si_(0.6)Sb_(0.4)S_(5)I electrolyte with high Li-ion conductivity(9.0 mS cm−1)and poor stability is successfully synthesized via the typical mechanochemical *** instability of this electrolyte with different electrode materials is investigated.A highly conductive Li_(3)InCl_(6)electrolyte,with a wide voltage window and excellent chemical and electrochemical stability,active material,and conductive carbon are introduced in the battery configuration,resulting in superior electrochemical performances with the bare LiNi_(0.7)Mn_(0.2)Co_(0.1)O_(2)*** corresponding battery delivers a discharge capacity of 162.1 mAh g^(−1)at 0.5C and maintains 83.8%of the capacity after 200 cycles at room ***,this battery with a cathode mass loading of 6.37 mg cm−2 displays discharge capacities of 197.5 and 73.4 mAh g^(−1)at the beginning when cycled at 0.5C and 0.1C under the operating temperature of 60 and−20℃,*** battery also achieved superior stablecycling performances at both *** to the fast ionic conductivity from Li_(6.6)Si_(0.6)Sb_(0.4)S_(5)I and high electronic conductivity from carbon in the cathode,the thick-electrode configurations with huge mass loadings of 50.96 and 76.43 mg cm^(−2)also exhibit good capacities and highly reversible *** work provides a guideline for enabling superior conducting sulfide electrolytes with poor stability in thick-electrode configuration solid-state batteries.

关键词： argyrodite structure Li_(6.6)Si_(0.6)Sb_(0.4)S_(5)I electrolyte stability thick electrode solid-state batteries electrochemical performances

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A Novel Method Based on Stacking Model for Remaining Useful Life Prediction of Lithium-ion Batteries

A Novel Method Based on Stacking Model for Remaining Useful ...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Zhuohao Li Qionglin Shi Junyi Xia Kangli Wang Kai Jiang School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China State Key Laboratory of advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

As an important energy storage technology, lithium-ion batteries are widely used in various industrial fields, effectively alleviating the pressure of energy transition and environmental pollution. In order to ensure the safe and efficient long-term service of lithium-ion batteries, it is particularly important to accurately estimate the remaining useful life (RUL). In this paper, a novel method based on stacking model is proposed for predicting the RUL of lithium-ion batteries. Firstly, multiple health features are extracted from capacity, voltage curve, and capacity-voltage curve. Then their correlations with RUL are analyzed using State of Health (SOH), current charging time, discharge time to 3.8v, discharge time to 3.35v, discharge time in the voltage range of 3.35v-3.8v and voltage at the turning point of the charging capacity-voltage curve of lithium-ion batteries. Next, a stacking model including gradient boosting decision tree, support vector regression, random forest and multiple linear regression is constructed. Finally, to validate the accuracy of the proposed method, it is applied to batteries from the Hawaii Natural Energy Institute (HNEI) dataset, and compared with the performance of individual model. The results show that the RUL prediction error of the proposed method is only 11.3, which has a high accuracy.

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Simply Fabricating F-Doped V2o3 Nanoparticles Adhered to N-Doped Carbon as a High-Rate Negative Electrode

SSRN

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SSRN 2024年

作者： Zhang, Dan Zhang, Chunyan Huo, Jie Zhe Sun, Jia Liu, Guangyin Liu, Xiaodi Yu, Chuang College of Chemistry and Pharmaceutical Engineering Nanyang Normal University Nanyang473061 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China

The development and application of V2O3-based negative materials are hindered by their poor reversible capacity and rate performance. Doping F and combined with N-doped carbon at the same time would achieve excellent electrochemical performance, but the related materials are not prepared and employed to lithium-ion batteries due to the absent synthetic method. In this investigation, a simple strategy is firstly invented to achieve F-doped V2O3/N-doped carbon composite. The F-doped V2O3 nanoparticles are adhered to N-doped carbon, which would enhance electrochemical reaction kinetics. As a result, a high capacity of 481 mAh g-1 can be obtained at 2 A g-1. © 2024, The Authors. All rights reserved.

关键词： Nanoparticles

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Electron-Beam Treatment of a Real Hair Dye Wastewater: Degradation of Target Pollutants and Quantitative Assessment of Competition from Coexisting Compounds

SSRN

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SSRN 2024年

作者： Bao, Qiburi Yu, Boming Li, Wangrui Yang, Miao Dong, Zhen Zhao, Long School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

Since the globally extensive production and consumption of hair dyes, the accompanying water pollution has been threatening human health and aquatic ecosystems currently. Gaining knowledge on the presence of compounds in real hair dye wastewater and developing efficient treatment are emerging issues. In recent years, water treatment by electron beam irradiation has attracted increasing attention as a powerful and economic technology for the destruction of pharmaceutical and personal care products (PPCPs). This paper studies the EB irradiation of a real hair dye industrial wastewater. The compositional analysis of the wastewater was made to identify the main components. In order to investigate the influence of coexisting background components on the degradation of target pollutants (four dyestuff intermediates) and to evaluate the interaction between different targets, the irradiation treatment was carried out under three matrices conditions (single solution, mixed solution and industrial wastewater). Quantitative assessment of the competing effects of non-target components and the selectivity of reactive species is performed.·OH and ·O2- are identified as the dominant reactive species involved, but show much lower selectivity toward the targets than reducing radicals (eaq- and ·H). The main breakdown products of the target pollutants are quinones, diphenols and carboxylic acids. © 2024, The Authors. All rights reserved.

关键词： Ionizing radiation

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Rolling Dispatch for Geo-Distributed Data Centers Considering the Uncertainties of Tasks and Renewables Based on Boundary Correction

Rolling Dispatch for Geo-Distributed Data Centers Considerin...

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Power and Energy engineering (ICPEE), International Conference on

作者： Tianyu Jin Xinyu Chen Linquan Bai State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan China William States Lee College of Engineering University of North Carolina at Charlotte Charlotte NC USA

ISBN: (数字)9798331530860

ISBN: (纸本)9798331530877

Optimizing the scheduling of geo-distributed data centers with high electricity demand and spatial and temporal flexibilities could enhance large-scale renewable consumption. However, the uncertainties of both renewable generation and arrived task amounts bring challenges to the real-time dispatch of renewable-integrated geo-distributed data centers. Furthermore, the time dependency of deferrable tasks makes the real-time scheduling more complex. This paper proposes a real-time rolling dispatch approach for geo-distributed data centers based on boundary correction to address the impacts of uncertainties. The detailed operational models of data centers are presented. The boundary correction method for updating the real-time operational constraints of data centers and renewables is developed. The improved rolling dispatch approach and real-time scheduling algorithm are also proposed. A test system is constructed to examine the proposed models and algorithm. The simulation results show that the boundary correction-based realtime rolling dispatch approach could enhance the capability to consume renewables locally and reduce the electricity cost of data centers.

关键词： Data centers Renewable energy sources Uncertainty Costs Scheduling algorithms Electricity Simulation Real-time systems Data models Uninterruptible power systems

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