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17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Ao, Yuqi Chen, Jinfu Cai, Defu Liu, Haiguang Chen, Rusi State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Electric Power Research Institute State Grid Hubei Electric Power Co. Ltd. Wuhan China

ISBN: (纸本)9789819903566

As various undesirable features such as intermittency, randomness and low inertia have been introduced into power system operation and control, it is imperative to develop efficient transient stability prediction (TSP) schemes. In view of the wide application of data mining technology, this paper proposes a data-driven method for TSP based on support vector machine (SVM) and ensemble learning. Firstly, grey wolf optimization (GWO) algorithm is introduced to select optimal hyperparameters of SVM. By approaching the selected position in every iteration, the constraint coefficient and balance factor are updated constantly and finally reach the fit values in search space. Moreover, an improved boosting method is applied to enhance the model performance, prediction results become more accurate and robust based on the combination of basic classifiers. Then, for the sake of filtering out the unreliable predictions, a trusted domain is set according to the distance between test sample and discriminant boundary. Finally, case studies on the IEEE 39-bus system illustrate the effectiveness of the proposed methodology. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Support vector machines

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Optimization Methodologies for Uncertainty Characterization with Large-Scale Renewables Integration 4th

Optimization Methodologies for Uncertainty Characterization ...

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4th International Conference on Energy Power and Automation engineering, ICEPAE 2023

作者： Wang, Miao Li, Zeke Sun, Bo Fan, Haiwei Hu, Xin Ding, Linglong China Electric Power Research Institute Beijing100192 China State Grid Fujian Electric Power Co. LTD Fuzhou350003 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9789819988778

The increasing penetration of renewable sources into the power grid brings uncertainty of active power on both the generation side and demand side also increases significantly. Power grid dispatching needs to be transformed from deterministic optimization to uncertain optimization. The scenario-based, stochastic programming, and robust optimization methods are optimization methods that can be used to characterize the uncertainty of renewable energy generation and improve power grid dispatching. This paper utilizes three methods to characterize the uncertainty of renewable output and employs a series of techniques to convert these methods into optimization that can be directly handled by existing solvers. An evaluation of each method is provided at the end. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Stochastic programming

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Loss and Vibration Analysis of Flywheel Energy Storage Motor for UPS System

Loss and Vibration Analysis of Flywheel Energy Storage Motor...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Yao, Kexin Ye, Caiyong Liu, Yi Yang, Mohan Zhao, Yunfeng School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China School of Electrical and Information Engineering Tianjin University Tianjin300072 China National Center for Quality Inspection and Test of Motors Jingxian242500 China

ISBN: (纸本)9798331530174

When the flywheel energy storage motor for UPS system is running at high speed through standby, its motor loss and electromagnetic vibration will increase. In order to improve system reliability, the motor structure needs to be reasonably designed. This paper firstly analyses the working state of flywheel energy storage motor for UPS system. Secondly, the theoretical basis of loss calculation and electromagnetic vibration is summarized in detail. In addition, the influence of structural parameters such as air gap length on stator iron loss and the influence of structural parameters such as stator slot opening on electromagnetic vibration are analyzed respectively. Through the comprehensive analysis of loss and vibration, this flywheel energy storage motor can achieve the performance requirements of low loss and low vibration. © 2024 IEEE.

关键词： Flywheels

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Summary of the 10th Conference on Magnetically Confined Fusion Theory and Simulation(CMCFTS)

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Plasma Science and technology 2023年第8期25卷 1-11页

作者：王志斌仇志勇王璐陈伟 Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People's Republic of China Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310027People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Southwestern Institute of Physics Chengdu 610041People's Republic of China

This paper gives a summary of the organization and the presentations delivered at the 10th Conference on Magnetically Confined Fusion Theory and Simulation(CMCFTS)held in Zhuhai,China,from 28th to 31st October *** conference focused on the latest progress in the research of the magnetic confined fusion plasma theory and simulations,as well as the largescale numerical simulation techniques developed in recent *** conference is held both online and offline,with about 110 domestic participants from 18 institutes participating in the live conference,and the statistical data from the live broadcast platform indicated that the online conference attracted over 20000 views per day.A summary of the conference is given,and the history of the CMCFTS is presented.A brief introduction to the poster section is also included in this paper.

关键词： CMCFTS magnetically confined fusion theory simulation conference report

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Deciphering Water Oxidation Catalysts:The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao Sun Jiamin Zhu Justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian Xi Zhichuan J.Xu Chun‑Hua Yan State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of Materials Science and Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Key Laboratory of Electromagnetic Materials and Devices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been widely observed in perovskite catalysts,and the reconstruction degree has been often correlated with the activity ***,a systematic study on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tendency and surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported NiFe-based ***,density functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term ***,it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction *** effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface *** finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

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Low-firing and temperature stability regulation of tri-rutile MgTa_(2)O_(6)microwave dielectric ceramics

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1935-1943页

作者： Chengzhi Xu Hongyu Yang Hongcheng Yang Linzhuang Xing Yuan Wang Zhimin Li Enzhu Li Guorui Zhao School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China Academy of Advanced Interdisciplinary Research Xidian UniversityXi’an 710071China School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China National Engineering Research Center of Electromagnetic Radiation Control Materials and Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of ChinaChengdu 610054China Songshan Lake Materials Laboratory A1 Building University Innovation ParkDongguan 523808China

A glass frit containing Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)component was used to explore the low-temperature sintering behaviors and microwave dielectric characteristics of tri-rutile MgTa_(2)O_(6)ceramics in this *** good low-firing effects are presented due to the high matching relevance between Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass and MgTa_(2)O_(6)*** pure tri-rutile MgTa_(2)O_(6)structure remains unchanged,and high sintering compactness can also be achieved at 1150℃.We found that the Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass not only greatly improves the low-temperature sintering characteristics of MgTa_(2)O_(6)ceramics but also maintains a high(quality factor(Q)×resonance frequency(f))value while still improving the temperature ***,great microwave dielectric characteristics when added with 2wt%Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass can be achieved at 1150℃:dielectric constant,ε_(r)=26.1;Q×f=34267 GHz;temperature coefficient of resonance frequency,τ_(f)=-8.7×10^(-6)/℃.

关键词： MgTa_(2)O_(6) ceramic microwave dielectric characteristics glass

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The interfacial engineering of metal electrodes for high-specific-energy and long-lifespan batteries

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iEnergy 2022年第2期1卷 204-222页

作者： Haomiao Li Yi Shen Zhuchan Zhang Anran Cheng Kangli Wang Xianbo Zhou Peng Cai Yujie Zhang Mengjun Li Min Zhou Wei Wang Ruxing Wang Kai Jiang School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Material Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

High-specific-energy batteries with long-lifespan are the development aspiration for energy storage *** electrodes with high specific capacity and low reduction potential are potential candidates for next-generation high-specific-energy ***,the stability of the metal electrode batteries is constantly suffered from the unstable interface issue during the plat-ing/stripping process,such as dendrite formation,dynamic evolution of solid electrolyte interphase,and other accompanied side *** solve these challenges,numerous researches have been intensively studied based on the interfacial engineering of metal electrodes,including electrode configuration optimization,interfacial chemistry regulation and solid-solid interface construc-tion,and the recent progress is elaborately introduced in this ***,the dendrite issues cannot be entirely prohibited in solid metal electrodes,which motivate the search for potential ***-metal electrodes with completely reversible structural changes and high mass transfer rate are rendered as an effective approach to solve the dendrite ***,the development of liquid metal electrode batteries is reviewed in this paper,in which the interfacial issues are explicated and some commendable achievements are *** the end,the implementation of interfacial engineering and the development roadmap of the metal electrode batteries are prospected.

关键词： Metal electrodes interfacial engineering metal dendrites solid state batteries liquid metal batteries

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Study on the Deterioration Characteristics of ECR Glass Fiber in Composite Insulators Under Acid-Heat Conditions 18th

Study on the Deterioration Characteristics of ECR Glass Fibe...

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18th Annual Conference of China Electrotechnical Society, ACCES 2023

作者： Huang, Ziheng Zhang, Dandan Lu, Ming Gao, Chao Li, Zhenbiao Wan, Zhiyu You, Yuwei Wang, Zehong School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Ministry of Education Wuhan430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China Henan Key Laboratory of Power Transmission Line Galloping Prevention and Control Technology State Grid Henan Electric Power Research Institute Zhengzhou450052 China

ISBN: (纸本)9789819710638

During the actual operation of composite insulators, they may be affected by various deterioration factors. Acid generated by partial discharge and abnormal heating may accelerate the deterioration of ECR glass fibers in composite insulators, leading to decay-like fracture of composite insulators. In this article, the deterioration experiment of ECR glass fibers comprehensively considered the effects of acid and temperature. The acid heat deterioration experiment of ECR glass fibers were conducted to investigate the changes in morphology and mechanical properties of ECR glass fibers. The results showed that the degradation effect of acid solution on ECR glass fibers was not significant at room temperature, while the surface of ECR glass fibers deteriorated by acid heat became rough and a large amount of powdery debris appeared;Meanwhile, compared to nitric acid, oxalic acid has a more severe degradation effect on glass fibers. After 12 days of deterioration with 1mol/L oxalic acid at 80 ℃, the tensile strength and elastic modulus of glass fibers decrease by more than 90%;After acid heat degradation, there are a large number of "debris" on the surface of the glass fiber. Fiber damage and fracture phenomena occur at the same time. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Tensile strength

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Stability Analysis of Multiple Grid-Connected Battery Energy Storage Systems with A Distributed Cooperative Control

Stability Analysis of Multiple Grid-Connected Battery Energy...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Chen, Yin Chen, Yuntao Li, Wentian Chen, Xia Zhao, Xianxian University of Strathclyde Department of Electronic and Electrical Engineering GlasgowG1 1XW United Kingdom State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China School of Electrical and Electronic Engineering University College Dublin DublinD04 V1 W8 Ireland

ISBN: (纸本)9798331530174

Battery Energy Storage System (BESS) plays a crucial role in the integration of renewable energy by balancing supply and demand, providing frequency regulation, and supporting voltage stability. However, for multiple grid-connected BESS systems, traditional power control methods, which focus on the dynamics of individual BESS, often neglect the interactions between BESSs. It results in idle power capacity and slow response times during transient events. To address these issues, a distributed cooperative control strategy based on a consensus algorithm has been proposed to improve the overall system's response speed and ensure steady-state power sharing according to the state of charge (SOC). However, few researchers have conducted the stability analysis of multiple BESSs under the distributed control scheme, and the interaction has not been thoroughly investigated. This paper addresses this gap by developing an impedance model for multiple BESSs by incorporating distributed cooperative control. With the impedance model proposed, the superiority of the BESSs with distributed cooperative control is demonstrated through a stability analysis comparison with traditional power control methods. Additionally, the study examines the impact of distributed cooperative control parameters and communication faults on the system stability. Simulations are conducted to validate the developed impedance model and the stability analysis results. © 2024 IEEE.

关键词： state of charge

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Low-Carbon Operation of Power Systems with Solar-Assisted Carbon Capture Power Plants Considering Interval-Probabilistic Cvar

SSRN

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SSRN 2024年

作者： Liang, Shuhao Lou, Suhua Luo, Yi State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

By leveraging solar thermal energy to offset the power output loss and broaden the net output adjustable range of carbon capture units, solar-assisted carbon capture power plants possess benefits in terms of energy economy, reserve capacity, and carbon emission reduction. This study focuses on the operation and scheduling of this advanced low-carbon power generation technology within power systems featuring high wind power penetration. Firstly, based on the analysis of the operational mechanism and energy flow relationship of solar-assisted carbon capture power plants, a flexible operation model is proposed to elucidate their characteristics in power generation, carbon capture, and thermal storage. Additionally, the conventional output and net output operation ranges of various carbon capture power plants are quantitatively studied by constructing a two-dimensional coordinate diagram. Secondly, based on the mathematical theory of interval-probabilistic CVaR, a quantified risk assessment method is introduced to evaluate the supply-demand imbalance risk in system operation, incorporating both interval and probabilistic uncertainty variables. Thirdly, a risk-aware operation scheduling model is developed to explore the capability of solar-assisted carbon capture power plants in enhancing the system's operation economic benefits and reducing the system's supply-demand imbalance risk. Finally, the numerical simulation and sensitivity analysis results on the modified IEEE-39 bus system have validated the low-carbon economic benefits and risk mitigation capability of solar-assisted carbon capture power plants participating in the system's operation. © 2024, The Authors. All rights reserved.

关键词： Wind power

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