检索结果-内蒙古大学图书馆

5th International Conference on Power engineering, ICPE 2024

作者： Yang, Dongjunming Xiong, Xinrui Ma, Rui Lou, Suhua Wang, Guanzhen Lin, Zheng Power Grid Planning & Research Center Guizhou Power Grid Co. Ltd Guiyang China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798331531140

As renewable energy rapidly develops, microgrids have gradually become an essential part of modern power systems. Microgrids integrate distributed generation, energy storage systems, and loads, improving energy utilization efficiency and offering strong resilience against disturbances. Electric vehicles (EVs), as a form of energy storage for renewable energy, have a significant impact on the operation of microgrids through their charging behavior. Proper scheduling of EV charging can not only reduce the operating costs of the microgrid but also balance loads and enhance renewable energy absorption. However, the uncertainty in DG output poses challenges to microgrid scheduling. The Information-Gap Decision Theory (IGDT) is an approach used to solve optimization problems involving uncertainty. Compared to traditional methods for handling uncertainty, such as stochastic programming, fuzzy programming, and interval robust optimization, IGDT has the advantage of not requiring precise probability distributions or uncertainty intervals for uncertain parameters. This paper proposes an optimization scheduling strategy for microgrids with orderly charging of EVs based on IGDT, analyzing the uncertainty of DG output. First, a model of EV travel characteristics and an orderly charging scheduling model are established. Then, a robust optimization model based on IGDT is constructed. The objective is to minimize the total operating cost of the microgrid. © 2024 IEEE.

关键词： Stochastic programming

来源：评论

学校读者我要写书评

暂无评论

Development of the pellet injection system on the J-TEXT tokamak

引用

Plasma Science and technology 2022年第9期24卷 127-133页

作者： Yingzhou JIANG Zhongyong CHEN You LI Wei YAN A LUKIN I VINYAR Feng LI Xin XU Zhipeng CHEN Zhoujun YANG Nengchao WANG Yonghua DING Yuan PAN the J-TEXT Team 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 PELIN LLC Saint-Petersburg 190031Russia

Pellet injection is an attractive technology for core-fueling and magnetohydrodynamic study in magnetic-conflnement fusion devices like tokamaks and *** can inject solid hydrogen/deuterium pellets into the plasma with deeper density deposition compared with other fueling methods,such as gas pufflng.A three-barrel H_(2)pellet injection system was installed on the J-TEXT tokamak and experiments were carried *** pellets are formed in three barrels cooled by a cryocooler and compressor system at around 9 K,and are 0.8 mm/1 mm diameter and 0.8 mm *** pellet is launched by helium propellant gas and injected from the lowfleld side of the *** normal range of pellet speed is 210–310 m s^(-1)for different propellant gas *** to the three-barrel structure,the number of injected pellets can be adjusted between one and *** can be launched sequentially with arbitrary time intervals,which enables flexible *** results of the experiments show that pellet fueling efflciency can reach 50%.The energy conflnement time increased by about 7.5–10 ms after pellet injection.

关键词： J-TEXT pellet injection system pellet fueling

来源：评论

学校读者我要写书评

暂无评论

The electromagnetic gyrokinetic simulations of ITG and TEM instability in finite-β tokamak plasmas 50

The electromagnetic gyrokinetic simulations of ITG and TEM i...

引用

50th EPS Conference on Plasma Physics, EPS 2024

作者： Zhang, Guodong You, Jinxiang Wang, Zihao Wang, Lu Wang, Shaojie International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology China Department of Engineering and Applied Physics University of Science and Technology of China Hefei230023 China

来源：评论

学校读者我要写书评

暂无评论

Disordered Rocksalts with Lattice Oxygen Activation as Efficient Oxygen Evolution Electrocatalysts

引用

Transactions of Tianjin University 2023年第4期29卷 304-312页

作者： Zhengli Huan Haipeng Fu Xuerong Zheng Huiming Ji School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China

The lattice oxygen oxidation mechanism(LOM)provides an efficient pathway for accelerating the oxygen evolution reaction(OER)in certain electrocatalysts by activating and involving lattice oxygen in the catalytic OER *** investigated the potential of disordered rocksalts as catalysts for accelerating the OER through the LOM process,leveraging their unique metastable Li-O-Li bond *** calculations were employed to predict the catalytic pathways and activities of disordered rocksalts(DRX),such as Li_(1.2)Co_(0.4)Ti_(0.5)O_(2)(LCTO).The results revealed that benefiting from the unhybridized Li-O electronic orbitals and the resulting metastable states of Li-O-Li bonds in DRX,LCTO exhibited a typical LOM pathway,and the lattice oxygen was easily activated and participated in the *** experimental results showed that LCTO exhibited a remarkable pH-dependent OER activity through the LOM pathway,with an overpotential of 241 mV at a current density of 10 mA/cm^(2),and excellent long-term *** work provides a novel chemical space for designing highly active and stable OER electrocatalysts by leveraging the LOM reaction pathway.

关键词： Lattice oxygen oxidation Disordered rocksalts Oxygen evolution reaction Electrocatalysts

来源：评论

学校读者我要写书评

暂无评论

Schlieren techniques for observations of long positive sparks:Review and application

引用

High Voltage 2022年第5期7卷 825-839页

作者： Junjia He Xiankang Wang Xiangen Zhao Juhyeong Lee Yaping Du Xiaopeng Liu Quan Gan Yang Liu Yuqin Liao State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhanChina Department of Building Environment and Energy Engineering Hong Kong Polytechnic UniversityKowloonChina Department of Mechanical and Aerospace Engineering Utah State UniversityLoganUtahUSA

Understanding the mechanism of positive leader discharge is important in lightning protection engineering and the external insulation design in high voltage power transmission *** the propagation of a positive leader,some processes without light-emitting,for example,the insulation recovery process after the breakdown,cannot be observed by optical photography *** the combination of the digital high-speed imaging system,the conventional Schlieren techniques offer new vistas in the long air gap discharge *** important features of high spatial resolution,high sensitivity,and easy arrangement make Schlieren techniques powerful and effective tools for characterising the discharge processes without *** work presents a brief review of current Schlieren techniques and discusses the design of the Schlieren optics system for long spark *** interesting phenomena discovered at different phases of long sparks with high-speed Schlieren techniques are also presented.

关键词： insulation system positive

来源：评论

学校读者我要写书评

暂无评论

Phase Delay Analysis of SP-SECE for Piezoelectric Vibration Energy Harvesting and Optimization 10

Phase Delay Analysis of SP-SECE for Piezoelectric Vibration ...

引用

10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Lv, Xinyue Peng, Han Lei, Junhao Zhao, Yidong Yan, Yuyao Huazhong University of Science and Technology China-EU Institute for Clean and Renewable Energy Wuhan China Huazhong University of Science and Technology School of Electrical and Electronic Engineering State Key Laboratory of Advanced Electromagnetic Technology Wuhan China

ISBN: (纸本)9798350351330

Synchronous charge extraction (SECE) have been a hot topic in piezoelectric energy harvesting. Some scholars have been using discrete electronic components to realize self-powered SECE. However, the SP-SECE has an obvious delay, which has a side effect on piezoelectric energy harvesting. In this paper, the delay of the SP-SECE circuit is specifically modeled. The influence of envelope detector and different piezoelectric patch parameters on delay is newly considered. The results of the analysis can provide more detailed guidelines for circuit design. © 2024 IEEE.

关键词： Energy harvesting

来源：评论

学校读者我要写书评

暂无评论

SHAP Algorithm for Transparent Power System Transient Stability Assessment: Critical Impact Factors Identification

SHAP Algorithm for Transparent Power System Transient Stabil...

引用

2023 International Conference on Power System technology, PowerCon 2023

作者： Lan, Yutian Shi, Zhongtuo Yao, Wei Zhou, Rui Luo, Feng Wen, Jinyu Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China State Grid Electric Power Research Institute Nari Group Corporation Nanjing China

ISBN: (纸本)9798350300222

Data-driven power system transient stability assessment (TSA) is a promising way to improve both the prediction efficiency and precision, but 'black-box' property affects their reliability and hinders the extraction of knowledge from the model, such as the critical impact factors for transient stability. By developing a TSA model based on imbalance-XGBoost algorithm, it can enhance the identification of unstable samples and increase the reliability of the model. By employing SHAP algorithm, a fast calculation method of Shapley value, to the TSA model, it can achieve the best possible computation of how each feature affects the prediction result. By examining the feature contribution from both local and global aspects, it can thoroughly explore the critical impact factors and offer guidance for power system control. The experiment on the standard 39-bus test system demonstrates that SHAP algorithm can enhance the model interpretability and realize outstanding transient stability assessment by using the obtained critical impact factors. © 2023 IEEE.

关键词： Machine learning

来源：评论

学校读者我要写书评

暂无评论

Variable-frequency Multi-phase-shift Control Strategy for Wide-range Bidirectional Resonant Converter Considering Detuning 3

Variable-frequency Multi-phase-shift Control Strategy for Wi...

引用

3rd IEEE China International Youth Conference on Electrical engineering, CIYCEE 2022

作者： Han, Dongtong Chen, Chansong Dong, Mingyang Xu, Zhiwen Gan, Lin Zhang, Jingyue State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology China

ISBN: (数字)9781665477321

ISBN: (纸本)9781665477321

The CLLLC resonant converter naturally has symmetrical bidirectional power transmission characteristics due to its symmetrical circuit structure, but the transmission power and efficiency will be reduced when resonant network is detuned. In this paper, a mathematical model for the CLLLC resonant converter is established based on the first harmonic approximation(FHA) method. Then, a variable-frequency multi-phase-shift control strategy that can achieve bidirectional power transfer over a wide voltage range and reduce the adverse effects of detuning of the resonant network is proposed. Finally, through simulations and experiments, the proposed control strategy is proved to be able to reduce the adverse effect of detuning. © 2022 IEEE.

关键词： Energy transfer

来源：评论

学校读者我要写书评

暂无评论

Reduced-order Model of Frequency Response Including PLL-based DFIG Wind Turbine 2

Reduced-order Model of Frequency Response Including PLL-base...

引用

2nd International Conference on Smart Grids and Energy Systems, SGES 2023

作者： Zhang, Ye Tang, Wangqianyun Fang, Yifan Liu, Yanjun He, Wei Li, Yingbiao China Southern Power Grid CSG Electric Power Research Institute State Key Laboratory of HVDC Guangzhou China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350371659

In the existing power system frequency response models, most of them ignore the dynamic process of inertial response of renewable energy generation equipment, which makes the new characteristics of power system frequency dynamics not described. In this paper, we take a doubly-fed induction generator (DFIG) as an example and establish its electromechanical time-scale motion equation in the frequency domain from its basic control structure, and extract the active power-frequency branch as the equivalent inertia of the DFIG, and the average frequency response model of the system was developed on this basis. Considering the inconvenience of higher order systems in the analysis, the least squares method is used to reduce the order of the frequency response model. Finally, the above model is simulated in MATLAB/Simulink and the simulation results are analyzed. © 2023 IEEE.

关键词： Frequency response

来源：评论

学校读者我要写书评

暂无评论

Research on Topology and Control Strategy of DR-MMC Cascaded Hybrid HVDC Transmission System for Offshore Wind Power

Research on Topology and Control Strategy of DR-MMC Cascaded...

引用

2023 International Conference on Power System technology, PowerCon 2023

作者： Di, Shimin Xiang, Wang Xu, Yinliang Meng, Peiyu Zhang, Haobo Wen, Jinyu Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350300222

Establishing a new type of power system with new energy as the mainstay, offshore wind power needs to be greatly flourished. Based on the research background of 2 GW offshore wind power grid connection, the DR-MMC hybrid cascade system is firstly proposed in this paper. Based on reactive power requirements, the feasible operating range of MMC under different capacities was solved. Therefore, the system parameters were optimized. Then designed the corresponding start-up, steady-state and reactive power coordination control strategies for the system. Finally, the electromagnetic transient simulation model of DR-MMC cascaded hybrid HVDC transmission system is built in PSCAD/EMTDC, and the simulation verified the feasibility of the proposed system topology and the effectiveness of the control strategy. © 2023 IEEE.

关键词： Topology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：