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2024 CPSS and IEEE International Symposium on Energy Storage and Conversion, CPSS and ISESC 2024

作者： Zhao, Mengyuan Zhang, Yu School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Wuhan China

ISBN: (纸本)9798350380514

The three-phase dual-active bridge converter (3pDAB) is becoming a promising topology due to the advantages of higher power density and efficiency. Under phase-shift (PS) modulation, the phase-shift angle will have a significant step change when the transmission power is quickly adjusted, which will cause serious transient oscillation of the inductance current and pose a risk to the safety of the converter. Focusing on the widely utilized single phase-shift (SPS) modulation, this paper examines the transient process of 3pDAB resulting from variations in the phase-shift angle. Then, by temporarily adjusting the external phase-shift angle, a fast transient current control strategy (FTCC) is proposed to mitigate oscillations, effectively managing the transient process within one-third of a switching cycle and facilitating smooth transmission power adjustments. Furthermore, the impact and oscillation of inductance current during transient process are significantly reduced. Finally, the performance of the control strategy was verified. © 2024 IEEE.

关键词： electromagnetic transients

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Multi-point discharge model: study on corona discharge of double-ended needle in large space

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Plasma Science and technology 2023年第3期25卷 62-69页

作者：李丁晨李家玮李传张明王鹏宇刘志杨勇于克训 International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical Engineering and ElectronicsHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical Engineering and ElectronicsHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Digital Grid Research Institute China Southern Power GridGuangzhou 510670People’s Republic of China The Fifth Bureau of China State Construction Engineering Corporation Changsha 410000People’s Republic of China

Corona discharge, as a common means to obtain non-equilibrium plasma, can generally obtain high-concentration plasma by increasing discharge points to meet production needs. However,the existing numerical simulation models used to study multi-point corona discharge are all calculations of small-scale space models, which cannot obtain the distribution characteristics of plasma in large space. Based on our previous research, this paper proposes a hybrid model for studying the distribution of multi-point discharge plasma in large-scale spaces, which divides the computational domain and computes separately with the hydrodynamic model and the ion mobility model. The simulation results are verified by a needle–ball electrode device. Firstly, the electric field distribution and plasma distribution of the needle electrodes with single tip and double tips are compared and discussed. Secondly, the plasma distribution of the needle electrode with the double tip at different voltages is investigated. Both computational and experimental results indicate that the charged particle concentration and current of the needle electrode with double tips are both twice as high as those of the needle electrode with a single tip. This model can extend the computational area of the multi-point corona discharge finite element model to the sub-meter(25 cm) or meter level, which provides an effective means to study the plasma distribution generated by multiple discharge points in large-scale space.

关键词： corona discharge numerical simulation multi-point discharge large space double needle tip electrode

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Design and performance study of a dielectric-filled cavity beam current monitor for HUST-PTF

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Nuclear Science and Techniques 2023年第8期34卷 75-85页

作者： Ji-Qing Li Kuan-Jun Fan Zheng-Zheng Liu Jian Wang Qu-Shan Chen Jin-Feng Yang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China The Institute of Scientific and Industrial Research Osaka University8-1 MihogaokaIbarakiOsaka 567-0047Japan

To guarantee the exact proton dose applied to patients and ensure treatment safety while disrupting and destroying tumor cells,it is essential to accurately monitor the proton beam current in real time during patient *** clinical treatment requires a proton beam current in the∼nA range,nondestructive beam current monitors(BCMs)are preferred to minimize the degradation of beam ***,this poses significant challenges in accurately monitoring such extremely low beam *** study proposes a cavity-type BCM equipped with a dielectric plate to reduce its dimensions and achieve sufficient measurement sensitivity for practical requirements.A prototype cavity BCM was fabricated,and off-line testing was performed using a metal wire to simulate the beam to study its *** the simulation and experi-mental results showed that the cavity BCM could measure ultralow proton beam currents with a resolution up to 0.03 nA.

关键词： Proton therapy Beam current Cavity BCM Nondestructive

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The application of metal-organic frameworks and their derivatives for lithium-ion capacitors

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新型炭材料（中英文） 2024年第5期39卷 872-895页

作者： ZHAO Sha-sha ZHANG Xiong LI Chen AN Ya-bin HU Tao WANG Kai SUN Xian-zhong MA Yan-wei Key Laboratory of High Density Electromagnetic Power and Systems(Chinese Academy of Sciences) Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Institute of Electrical Engineering and Advanced Electromagnetic Drive TechnologyQilu ZhongkeJinan 250013China

There is an urgent need for lithium-ion capacitors(LICs)that have both high energy and high power densities to meet the continuously growing energy storage *** effectively balance the high energy density of traditional rechargeable batteries with the superior power density and long life of supercapacitors(SCs).Nevertheless,the development of LICs is still hampered by limited kinetic processes and capacity mismatch between the cathode and ***-organic frameworks(MOFs)and their derivatives have received significant attention because of their extensive specific surface area,different pore structures and topologies,and customizable functional sites,making them compelling candidate materials for achieving high-performance ***-derived carbons,known for their exceptional electronic conductivity and large surface area,provide improved charge storage and rapid ion ***-derived transition metal oxides contribute to high specific capacities and improved electrochemical ***,MOF-derived metal compounds/carbons provide combined effects that increase both the capacitive and Faradaic reactions,leading to a superior overall *** review begins with an overview of the fundamental principles of LICs,followed by an exploration of synthesis strategies and ligand selection for MOF-based composite *** then analyzes the advantages of original MOFs and their derived materials,such as carbon materials and metal compounds,in enhancing LIC ***,the review discusses the major challenges faced by MOFs and their derivatives in LIC applications and offers future research directions and recommendations.

关键词： Lithium-ion capacitors MOFs Transition metal oxide Energy density Power density

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Characterization of a Raman-based distributed fiber optical temperature sensor in liquid nitrogen

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Superconductivity 2022年第4期4卷 22-28页

作者： Yi Yue Guilun Chen Jiajie Long Li Ren Kao Zhou Xianhao Li Ying Xu Yuejin Tang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina

Distributed Temperature Sensor(DTS)based on Raman scattering have a promising application in temperature monitoring and quench detection of high‐temperature superconducting(HTS)fiber optic *** this paper,a series of mechanical property tests were carried out on fiber optical cables with different encapsulation materials to select the best material for the engineering *** was followed by loss testing of fiber optic cables with different outer diameters under liquid nitrogen(LN_(2))and the optimal outer diameter to meet measurement accuracy and engineering practicability was ***,the temperature measurement of fiber optic cables laid on HTS fiber optic cables were calibrated using thermocouple as a *** results of this research results provide a suitable fiber optic cable for engineering *** the same time,it provides a reference for the selection of optical cable structure parameters in HTS optical cable projects.

关键词： DTS HTS cable Mechanical property Optical loss

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Intelligent Predetermination of Generator Tripping Scheme: Knowledge Fusion-based Deep Reinforcement Learning Framework

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 66-75页

作者： Lingkang Zeng Wei Yao Ze Hu Hang Shuai Zhouping Li Jinyu Wen Shijie Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronics EngineeringHuazhong University of Science and TechnologyWuhan 430074China Dispatching and Control Center Central China Branch of State Grid Corporation of ChinaWuhan 430077China. Department of Electrical Engineering and Computer Science University of TennesseeKnoxvilleTN 37996USA

Generator tripping scheme(GTS)is the most commonly used scheme to prevent power systems from losing safety and ***,GTS is composed of offline predetermination and real-time scenario ***,it is extremely time-consuming and labor-intensive for manual predetermination for a large-scale modern power *** improve efficiency of predetermination,this paper proposes a framework of knowledge fusion-based deep reinforcement learning(KF-DRL)for intelligent predetermination of ***,the Markov Decision Process(MDP)for GTS problem is formulated based on transient instability ***,linear action space is developed to reduce dimensionality of action space for multiple controllable ***,KF-DRL leverages domain knowledge about GTS to mask invalid actions during the decision-making *** can enhance the efficiency and learning ***,the graph convolutional network(GCN)is introduced to the policy network for enhanced learning *** simulation results obtained on New England power system demonstrate superiority of the proposed KF-DRL framework for GTS over the purely data-driven DRL method.

关键词： Deep reinforcement learning generator tripping scheme graph convolutional network invalid action masking knowledgefusion

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Distribution network gray-start and emergency recovery strategy with pumped storage unit under a typhoon

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Global Energy Interconnection 2025年第1期8卷 121-133页

作者： Zhenguo Wang Hui Hou Chao Liu Shaohua Wang Zhengtian Li Xiangning Lin Te Li Research Institute of State Grid Zhejiang Electric Power Company Hangzhou 310014PR China School of Automation Wuhan University of TechnologyWuhan 430070PR China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074PR China

Typhoons can cause large-area blackouts or partial outages of distribution *** define a partial outage state in the distribution network as a gray state and propose a gray-start strategy and two-stage distribution network emergency recovery framework.A phase-space reconstruction and stacked integrated model for predicting wind and photovoltaic generation during typhoon disasters is proposed in the first *** provides guidance for second-stage post-disaster emergency recovery *** emergency recovery scheduling model is established in the second stage,and this model is supported by a thermal power-generating unit,mobile emergency generators,and distributed *** generation includes wind power generation,photovoltaics,fuel cells,***,we con-sider the gray-start based on the pumped storage unit to be an important first step in the emergency recovery *** model is val-idated on the improved IEEE 33 node system,which utilizes data from the 2022 super typhoon“Muifa”in Zhoushan,Zhejiang,*** indicate the superiority of a gray start with a pumped storage unit and the proposed emergency recovery strategy.

关键词： Wind and photovoltaic generation prediction Pumped storage unit Gray-start Distribution network Emergency recovery strategy

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Research on Coupling Simulation Method of Temperature Field and Stress Field in Double-Layer Thin-Walled Corrugated Tube 18th

Research on Coupling Simulation Method of Temperature Field ...

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18th Annual Conference of China Electrotechnical Society, ACCES 2023

作者： Tong, Yingjie Cai, Jiaqi Peng, Sisi Chen, Lingxuan Ding, Xuan Xu, Ying Li, Xianhao State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Electromagnetic Energy Wuhan Institute of Marine Electric Propulsion Wuhan430064 China

ISBN: (纸本)9789819710676

In recent years, with the increasing power load in major cities in China, the existing conventional power cables are unable to meet the high-density and high-capacity power transmission requirements. High-temperature superconducting cables, with their characteristics of high capacity, low loss, compact structure, energy-saving, and environmental-friendliness, have promising applications for future urban high-density power transmission. As one of the key components in the cryogenic refrigeration system of superconducting cables, the mechanical performance of double-layer thin-walled stainless steel corrugated tubes directly determines the ability of superconducting cables to resist external forces. In order to study the mechanical performance of double-layer thin-walled stainless steel corrugated tubes under the operating conditions of superconducting cables, this paper establishes a three-dimensional shell model of double-layer thin-walled stainless steel corrugated tubes under tension and bending conditions using finite element simulation. It analyzes the stress and plastic strain distribution characteristics of the double-layer thin-walled corrugated tubes and proposes a temperature field and stress field coupling simulation method for double-layer thin-walled corrugated tubes. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Finite element method

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Modular Modeling Method for Transfer Function of VSC Grid-Connected System 3

Modular Modeling Method for Transfer Function of VSC Grid-Co...

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3rd International Conference on Intelligent Power and Systems, ICIPS 2023

作者： Li, Yutong Sun, Haishun The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Hubei Wuhan China

ISBN: (纸本)9798350328691

This paper provides a detailed introduction to a modular modeling approach for the transfer function of the VSC grid-connected system. The obtained results can accurately reflect the small-disturbance stability level of VSC grid-connected systems. These results are based on the VSC outer-loop reference signal and the corresponding feedback signal, constituting a two-input two-output system. The modeling process involves three steps. Initially, only the dynamic processes of the VSC inner-loop control and PLL control modules are considered. Subsequently, the relevant modules of the VSC outer-loop control are included. Finally, it is condensed into a concise form. By utilizing the basic property of linearity in systems that adhere to the superposition principle, it can be converted into an equivalent single-input single-output system. This enables the application of the Nyquist stability criterion for stability analysis. All results presented in this paper have been validated through PSCAD/EMTDC simulation. ©2023 IEEE.

关键词： Transfer functions

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Plasma-activated hydrogel:fabrication,functionalization,and effective biological model

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Plasma Science and technology 2023年第9期25卷 1-9页

作者：李嘉诚兰存涛聂兰兰刘大伟卢新培 State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Wuhan National High Magnetic Field Center Wuhan 430074People’s Republic of China

Hydrogels are biomaterials with 3D networks of hydrophilic *** generation of hydrogels is turning to the development of hydrogels with the help of enabling *** can tailor the hydrogels’properties through simultaneous physical and chemical actions,resulting in an emerging technology of plasma-activated hydrogels(PAH).PAH can be divided into functional PAH and biological tissue model *** review systematically introduces the plasma sources,plasma etching polymer surface,and plasma cross-linking involved in the fabrication of ***‘diffusion-drift-reaction model’is used to study the microscopic physicochemical interaction between plasma and biological tissue PAH ***,the main achievements of PAH,including wound treatment,sterilization,3D tumor model,etc,and their development trends are discussed.

关键词： plasma-activated hydrogel plasma crosslinking biological model

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