检索结果-内蒙古大学图书馆

5th International Conference on Energy Storage and Intelligent Vehicles, ICEIV 2022

作者： Jin, Chu Yang, Yan Zuo, Zhengmin Luo, Shuxin Wen, Jinyu Grid Planning & Research Center of Guangdong Power Grid Corporation Guangzhou510080 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology College of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9789819910267

With the increase of photovoltaic (PV) power penetration level in the system, the requirements for PV integration is becoming stricter to guarantee the secure and stable operation of the grid. PV stations will be possibly required to perform like a synchronous generator which could participate in frequency regulation, reactive power support as well as provide inertia apart from ramp rate control and the energy storage system is a promising solution. A coordinated control strategy for Photovoltaic-Battery Energy Storage System (PV-BESS) based on virtual synchronous generator (VSG) and reactive current injection is proposed in this paper. The PV station is able to provide virtual inertia, deal with energy exchange between PV-BESS system and conventional power grid as well as response to the system frequency change, thus improving the stability of the power system effectively. Moreover, the influences of control parameters on system performance are studied and the optimal configuration method of BESS is illustrated by using sensitivity analysis, providing reference for BESS configuration in the system. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Energy storage

来源：评论

学校读者我要写书评

暂无评论

A critical survey of technologies of large offshore wind farm integration: summary, advances, and perspectives

引用

Protection and Control of Modern Power Systems 2022年第1期7卷 233-264页

作者： Bo Yang Bingqiang Liu Hongyu Zhou Jingbo Wang Wei Yao Shaocong Wu Hongchun Shu Yaxing Ren Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming 650500China State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology)Wuhan 430074Hubei ProvinceChina Warwick Manufacturing Group University of WarwickCoventry CV47ALUK

Offshore wind farms(OWFs)have received widespread attention for their abundant unexploited wind energy poten-tial and convenient locations *** are rapidly developing towards having large capacity and being located further away from *** is thus necessary to explore effective power transmission technologies to connect large OWFs to onshore *** present,three types of power transmission technologies have been proposed for large OWF *** are:high voltage alternating current(HVAC)transmission,high voltage direct current(HVDC)transmission,and low-frequency alternating current(LFAC)or fractional frequency alternating current *** work undertakes a comprehensive review of grid connection technologies for large OWF *** with previous reviews,a more exhaustive summary is provided to elaborate HVAC,LFAC,and five HVDC topologies,consisting of line-commutated converter HVDC,voltage source converter HVDC,hybrid-HVDC,diode rectifier-based HVDC,and all DC transmission *** fault ride-through technologies of the grid connection schemes are also presented in detail to provide research references and guidelines for *** addition,a comprehensive evalu-ation of the seven grid connection technologies for large OWFs is proposed based on eight specific ***,eight conclusions and six perspectives are outlined for future research in integrating large OWFs.

关键词： Offshore wind farm HVAC HVDC LFAC Fault ride-through

来源：评论

学校读者我要写书评

暂无评论

An ISGW Filtering Antenna with Spurious Modes and Surface Wave Suppression for Millimeter Wave Communications

引用

China Communications 2023年第11期20卷 1-12页

作者： Lihui Wang Dongya Shen Qiuhua Lin Zhiyong Luo Wenjian Wang Jianpei Chen Zhao Gao Wei Zhang School of Electronics and Communication Engineering Sun Yat-sen UniversityShenzhen 518107China School of Information Science and Engineering Yunnan UniversityKunming 650091China Kuang-Chi Institute of Advanced Technology&State Key Laboratory of Meta-RF Electromagnetic Modulation Technology ShenzhenChina School of Electrics and Information Engineering Yunnan Minzu UniversityKunmingChina Institute of Telecommunication and Navigation Satellites China Academy of Space TechnologyBeijing 100094

In this paper,an integrated substrate gap waveguide(ISGW)filtering antenna is proposed at millimeter wave band,whose surface wave and spurious modes are simultaneously suppressed.A secondorder filtering response is obtained through a coupling feeding scheme using one uniform impedance resonator(UIR)and two stepped-impedance resonators(SIRs).To increase the stopband width of the antenna,the spurious modes are suppressed by selecting the appropriate sizes of the ISGW unit ***,the ISGW is implemented to improve the radiation performance of the antenna by alleviating the propagation of surface *** an equivalent circuit is investigated to reveal the working principle of *** demonstrate this methodology,an ISGW filtering antenna operating at a center frequency of 25 GHz is designed,fabricated,and *** results show that the antenna achieves a stopband width of 1.6f0(center frequency),an out-of-band suppression level of 21 dB,and a peak realized gain of 8.5 dBi.

关键词： filtering antenna integrated substrate gap waveguide millimeter wave communications spurious modes suppression surface wave suppression

来源：评论

学校读者我要写书评

暂无评论

Ball Mill Fault Detection System Based on Autoencoder Neural Network 3

Ball Mill Fault Detection System Based on Autoencoder Neural...

引用

3rd International Conference on advanced Manufacturing technology and Manufacturing Systems, ICAMTMS 2024

作者： Fan, Yonggang Ai, Xinkun Liu, Kun Zheng, Wei Wu, Xinwu Wugang Resources Group Co. Ltd. Ezhou436000 China State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9781510681804

Ball mills play a critical role in modern industrial production, and issues with their bearings directly impact production efficiency and equipment maintenance costs. Traditional methods for bearing fault detection require using fault samples to learn the mechanism, but this can damage equipment and result in high costs. This paper proposes a bearing fault detection method based on autoencoder, which trains only on normal data to overcome the limitations of traditional approaches. The fault detector utilizes vibration signals from bearings to achieve real-time bearing state monitoring and fault early warning. Additionally, due to the complex composition of ball mills, multiple key components near the bearings need to be monitored. A single anomaly detector cannot locate or comprehensively analyze faults. Hence, this study proposes a ball mill fault detection system integrated with multiple anomaly detectors, capable of monitoring the bearing status in multiple parts of the ball mill, automatically localizing and warning of faults when they occur. Finally, Practical deployment at Wugang Resources Group validates that the autoencoder-based fault detector can identify bearing anomalies and demonstrates the ability of the integrated system for fault warning and localization. © 2024 SPIE.

关键词： Ball mills

来源：评论

学校读者我要写书评

暂无评论

Degradation mechanism analysis of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) single crystal cathode materials through machine learning

引用

npj Computational Materials 2022年第1期8卷 2119-2127页

作者： Wuxin Sha Yaqing Guo Danpeng Cheng Qigao Han Ping Lou Minyuan Guan Shun Tang Xinfang Zhang Songfeng Lu Shijie Cheng Yuan-Cheng Cao School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China State Grid Huzhou Electric Power Supply Company Huzhou313000China School of Cyber Science&Engineering Huazhong University of Science and TechnologyWuhan430074China

LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523)has become one of the most popular cathode materials for current lithium-ion batteries due to its high-energy density and cost ***,the rapid capacity fading of NCM severely hinders its development and ***,the single crystal NCM523 materials under different degradation states are characterized using scanning transmission electron microscopy(STEM).Then we developed a neural network model with a two-sequential attention block to recognize the crystal structure and locate defects in STEM *** number of point defects in NCM523 is observed to experience a trend of increasing first and then decreasing in the degradation *** space between the transition metal columns shrinks obviously,inducing dramatic capacity *** analysis sheds light on the defect evolution and chemical transformation correlated with layered material *** also provides interesting hints for researchers to regenerate the electrochemical capacity and design better battery materials with longer life.

关键词： battery crystal analysis

来源：评论

学校读者我要写书评

暂无评论

Analytical Model for Magnetic Field of Toroidal D-Shaped HTS Magnet

Analytical Model for Magnetic Field of Toroidal D-Shaped HTS...

引用

2023 IEEE International Conference on Applied Superconductivity and electromagnetic Devices, ASEMD 2023

作者： Song, Meng Li, Li Qiu, Yifeng Ren, Li Xu, Ying China Southern Power Grid Company Ltd Joint Laboratory on Power Superconducting Technology Guangzhou China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China Huazhong University of Science and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350301571

The electromagnetic computation complexity of large-scale three-dimensional superconducting magnets is extremely high, posing significant challenges for optimizing their design. In this paper, an analytical model for the magnetic field of toroidal D-shaped high-temperature superconducting (HTS) magnets is developed based on the assumptions of uniform current distribution and the vector potential's Poisson equation. A comparison with results obtained using the H-formulation reveals that the assumption of uniform current distribution introduces acceptable errors in the magnetic field. To expedite calculations while maintaining precision, the discrete integration method is adopted, providing computation speeds that are two to three orders of magnitude faster than the finite element method (FEM). This model can be applied for calculating parameters such as center magnetic field and critical current, thereby enhancing the efficiency of electromagnetic design for superconducting magnets. © 2023 IEEE.

关键词： HTS magnets magnetic field calculation toroidal D-shaped magnets

来源：评论

学校读者我要写书评

暂无评论

AC Loss Evaluation of a Toroidal D-Shaped 10 MJ Superconducting Magnet

AC Loss Evaluation of a Toroidal D-Shaped 10 MJ Superconduct...

引用

2023 IEEE International Conference on Applied Superconductivity and electromagnetic Devices, ASEMD 2023

作者： Li, Li Song, Meng Long, Feiyang Xu, Ying Ren, Li China Southern Power Grid Company Ltd Joint Laboratory on Power Superconducting Technology Guangzhou China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China Huazhong University of Science and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350301571

A 10 MJ HTS SMES designed for power system voltage compensation and active-reactive power regulation applications is under construction. The system aims to complete 10MJ charging or discharging in 2s time, so it is crucial to analyze its AC losses. In this paper, the AC loss of the magnet is analyzed by the dimensional reduction inversion method, and the AC loss of the magnet for one complete working cycle is obtained to be about 72 KJ, which provides a reference for the design of the cooling system of SMES. © 2023 IEEE.

关键词： AC loss HTS magnet toroid

来源：评论

学校读者我要写书评

暂无评论

Multimaterial additive manufacturing manipulator for fabricating magnetoelectric pressure sensors

引用

Science China(Technological Sciences) 2022年第11期65卷 2542-2550页

作者： LIU ZhuFeng LI ZhaoQing WANG Qi WANG Yan YANG Lei NIE Xiang GENG Peng WU ZhenHua TANG SiHan YANG Lei WU HongZhi SHI YunSong CHEN Peng SU Bin ZHANG LiChao YAN ChunZe SHI YuSheng State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and Technology Wuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China Schol of Materials Science and Enginering Wuhan Insitute of TechnologyWuhan 430205Chinai School of Transportation and Logisis Engineering Wuhan University of TechnologyWuhan 430063China Deparment of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and Technology Wuhan 430030China

The simultaneous placement of different types of materials including polymers,ceramics,and metals,in their desired positions could be adopted to manufacture end-use devices/apparatuses with diverse functionalities and significantly reduce the fabrication cost and ***,existing additive manufacturing(AM)approaches can only treat one material species at a time due to their intrinsic working *** we develop an AM manipulator for manufacturing a wide variety of material species,including polymers,ceramics,and metals,through a multifilament transport strategy assisted by laser *** six-jaw manipulator contains three pairs of filament delivering/cutting systems for transporting diverse materials and a beam of tunable laser as the thermal *** whole apparatus is integrated into a robotic manipulator to create a multifreedom manufacturing *** this innovation,products with multiple material species and desired complex geometries can be fabricated on ***,we synthesize a multimaterial(polymer/ceramic/metal)printed magnetoelectric pressure sensor that can convert applied mechanical forces to electricity and maintain efficiency even after undergoing 10000 cycles of pressure/*** this multimaterial filament transport and laser manufacturing strategy,our AM manipulator exhibits promising application in the advanced manufacturing of embedded electronics,sensors,soft robotics,and customizable medical devices.

关键词： multiple materials additive manufacturing laser manipulator magnetoelectric

来源：评论

学校读者我要写书评

暂无评论

Virtual Impedance Control for Enhancing the Inertia Provision of Grid-forming Doubly-fed Induction Generator

Virtual Impedance Control for Enhancing the Inertia Provisio...

引用

International Conference on Power Electronics and Motion Control (IPEMC)

作者： Yanjun Liu Yifan Fang Jiabing Hu Wei He Meng Zhan State Key Laboratory of Advanced Electromagnetic Technology and School of Electrical and Electronic Engineering Huazhong University of Science and Technology China

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

Grid-forming converters (GFMs) are regarded as a solution to enhancing the frequency support ability of the power grid. Applying the virtual synchronous generator (VSG) technology, GFM mimics the swing function of synchronous generators (SGs). It is found in this paper, however, that the inertia provision of VSG-based grid-forming doubly-fed induction generator (VSG-DFIG) is limited. The root cause is analyzed, indicating that the resistive-inductive internal impedance is not beneficial to providing power support under unbalanced active power disturbances. To address this issue, the terminal voltage controller (TVC) is modified by adding a virtual impedance control, rather than applying supplementary controllers on the active power control sections. The virtual impedance control optimizes the characteristic of the equivalent inertia of the DFIG and strengthens the inertial response. Finally, preliminary simulation results are presented to verify the feasibility of the proposed control strategy.

关键词： Resistors Time-frequency analysis Simulation Power system stability Synchronous generators Stability analysis Impedance

来源：评论

学校读者我要写书评

暂无评论

Performance Evaluation of Novel Segmental Rotor Switch Reluctance Motor with Magnetic Bridge 27

Performance Evaluation of Novel Segmental Rotor Switch Reluc...

引用

27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Su, Sinian Sun, Jianbo Zhang, Shuixi Wang, Honggang Wang, Shuanghong Yang, Yang Zhao, Ziqi Qu, Ronghai Wu, Huangyuan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China State Grid Henan Power Company Luohe Power Supply Company China Henan Tailong Power EquipmentCo. Ltd China Cyan Exploring Power Technology Wuxi Co Wuxi China

ISBN: (纸本)9784886864406

The segmented rotor switched reluctance motor (SSRM) has the characteristics of a short magnetic circuit, high torque density, low wind resistance, and high efficiency compared to the traditional switched reluctance motor (SRM). However, the complex manufacturing process of SSRM acts against their use. In this paper, a new type of segmented rotor switched reluctance motor with a rotor magnetic bridge (SSRMMB) is proposed, which connects the rotor blocks into a whole. The static inductance characteristics of the SSRM and SSRMMB are investigated through electromagnetic simulation. The performance of the two motors is then comparatively analyzed under angle position control (APC) and unipolar sinusoidal excitation control (USC), with a further analysis of the reasons for any differences. The simulation results show that there is little difference in the performance of the two motors during normal operation. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Reluctance motors

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：