检索结果-内蒙古大学图书馆

Techno-economic analysis of fuel cell trucks with different powertrain hybridization and hydrogen resources by 2040: case study of China

引用

International Journal of Hydrogen Energy 2025年 132卷 174-182页

作者： Nan, Long Xu, Feiyang Sui, Pang-Chieh Feng, Yanbiao Hao, Han Li, Shunxi Huang, Feng Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology and Hubei Research Center for New Energy & Intelligent Connected Vehicle School of Automotive Engineering Wuhan University of Technology Hubei 430070 China Institute for Integrated Energy Systems University of Victoria VictoriaBCV8W 2Y2 Canada School of Mechanical Engineering University of Science & Technology Beijing Beijing100083 China State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing100084 China

This study conducts a techno-economic analysis of fuel cell electric trucks with different hybridization factors (i.e., the power distribution ratio between batteries and fuel cells) by evaluating their life-cycle carbon dioxide (CO2) emissions and total cost of ownership (TCO) from 2020 to 2040. It integrates the energy consumption of trucks with varying hybridization factors under different driving cycles with China's hydrogen production, transportation models, and electric grid structure. Through this analysis, the TCO and emissions of individual trucks are examined across different scenarios. The study reveals that highly hybridized trucks offer advantages in both emissions reduction and cost savings across all hydrogen production and transport pathways. A 67% hybridization factor results in a 5%-9% reduction in emissions and a 34%-46% decrease in TCO compared to the lowest hybridization factor. The energy-saving and emission-reducing effects of highly hybridized fuel cell electric vehicles (FCEVs) also depend on the driving cycle, with optimal performance observed in the Urban Dynamometer Driving Schedule for Heavy-Duty Vehicles (UDDSHDV) cycle, while minimal advantages appear in the China Heavy-Duty Commercial Vehicle Test Cycle for Heavy Trucks (CHTC-HT) cycle. Furthermore, life-cycle emissions of trucks decrease gradually over time for all hydrogen production pathways, with the electrolysis of grid electricity showing the fastest decline. By 2040, trucks powered by hydrogen from grid electricity will have slightly lower emissions than those using coal, while green hydrogen remains the cleanest option. In conclusion, adopting fuel cell trucks with high hybridization factors, powered by green hydrogen, presents significant economic and environmental benefits for the future of transportation. © 2025 Hydrogen Energy Publications LLC

关键词： Commercial vehicles

来源：评论

学校读者我要写书评

暂无评论

From crack-prone to crack-free:Eliminating cracks in additively manufacturing of high-strength Mg2Si-modified Al-Mg-Si alloys

引用

材料科学技术（英文版） 2025年第1期204卷 276-291页

作者： Tao Wen Zhicheng Li Jianying Wang Yimou Luo Feipeng Yang Zhilin Liu Dong Qiu Hailin Yang Shouxun Ji State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Light Alloy Research Institute College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Centre for Additive Manufacturing School of EngineeringRMIT UniversityMelbourneVIC 3000Australia Brunel Centre for Advanced Solidification Technology(BCAST) Brunel University LondonUxbridgeMiddlesexUB8 3PHUnited Kingdom

Large solidification ranges and coarse columnar grains in the additively manufacturing of Al-Mg-Si alloys are normally involved in hot cracks during *** this work,we develop novel crack-free Al-Mg2Si alloys fabricated by laser powder-bed fusion(L-PBF).The results indicate that the eutectic Mg2Si phase possesses a strong ability to reduce crack *** can enhance the grain growth restriction factor in the initial stage of solidification and promote eutectic filling in the terminal stage of *** crack-free L-PBFed Al-xMg2Si alloys(x=6 wt.％,9 wt.％,and 12 wt.％)exhibit the combination of low crack susceptibility index(CSI),superior ability for liquid filling,and grain ***,the L-PBFed Al-9Mg2Si alloy shows improved mechanical properties(*** strength of 397 MPa and elongation of 7.3％).However,the cracks are more likely to occur in the region near the columnar grain boundaries of the L-PBFed Al-3Mg2Si alloy with a large solidification range and low eutectic content for liquid ***,the L-PBFed Al-3Mg2Si alloy shows poor bearing capacity of mechanical *** precise tuning of Mg2Si eutectic content can offer an innovative strategy for eliminating cracks in additively manufactured Al-Mg-Si alloy.

关键词： Aluminium alloys Las powder-bed fusion Crack elimination Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

Real-time nested scheduling model with embedded adaptive charging–discharging strategy considering EV uncertainty

引用

Energy 2025年 328卷

作者： Aoli, Huang Suhua, Lou Gang, Lu Wenrui, Zhang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China State Grid Energy and Power Planning Laboratory State Grid Energy Research Institute Beijing102209 China

The widespread adoption of electric vehicles (EVs) offers substantial environmental benefits but presents significant challenges for power system management due to the inherent uncertainties in EV users’ behavior and charging demands. To address these issues, this study proposes a real-time nested scheduling model with an adaptive charging–discharging strategy for community, supermarket, and street parking facilities. The model employs an adaptive approach where EV users provide essential information upon arrival at the microgrid (MG), choosing between unordered or ordered participation based on their preferences. A priority-based two-stage schedule planning strategy is implemented, first planning the overall charging–discharging power for the EV cluster, then refining individual EV power based on priorities. For EVs requiring early departure, priorities are adjusted to ensure the expected state of Charge is reached before leaving. The model features a real-time nested framework with a bi-level optimization outer layer to coordinate conflicting interests among entities and an inner layer for EV power allocation. To address high uncertainties, a Model Predictive Control algorithm is employed, incorporating Karush–Kuhn–Tucker conditions, strong duality theorem, and linearization techniques. Simulation results demonstrate the model's superior operational efficiency, reliability, and robustness while achieving a win–win outcome for both the MG operator and EV cluster. © 2025

关键词： Linear transformations

来源：评论

学校读者我要写书评

暂无评论

Design and Experimental Study of a Toroidal Winding Flywheel Energy Storage Motor

引用

IEEE Transactions on Energy Conversion 2025年

作者： Ye, Caiyong Yao, Kexin Liu, Yi Cao, Guangdong Qi, Xiaodong Li, Zhixin Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China Naval University of Engineering College of Electrical Engineering Wuhan430074 China

Design cost and bearing stability have always been a challenge for flywheel energy storage system (FESS). In this study, a toroidal winding flywheel energy storage motor is designed for low and medium speed occasions, aiming to meet the challenges of conventional high-speed flywheel energy storage motors in terms of process cost and control difficulty. Firstly, the research motivation of this paper is introduced by analyzing the traditional high-speed flywheel energy storage motor structure and its problems. Secondly, the hybrid shaft-bearing system is established to improve the stability of shaft control and reduce maintenance costs. The magnetic equivalent circuit (MEC) of the axial magnetic bearing (AMB) is created to simplify the design and radial mechanical bearing (RMB) life is analyzed. Besides, comparing different rotor and winding structures, an interior permanent magnet motor (IPM) and toroidal winding (TW) scheme is proposed to reduce production costs and increase the critical speed of the flywheel rotor. Fourthly, the performance indexes of the TW flywheel energy storage motor, such as rotor static, losses, temperature rise and electromagnetic vibration are analyzed by the FEA. Finally, a 10kW-3MJ prototype is manufactured and tested. The experiment verifies the rationality of the concept and design. This article provides reference for the design and optimization of flywheel energy storage motors in low and medium speed occasions, which has certain theoretical and practical application significance. © 1986-2012 IEEE.

关键词： Flywheels

来源：评论

学校读者我要写书评

暂无评论

Transient Synchronization Stability Analysis and Assessment of DFIG System Under Severe Faults

arXiv

引用

arXiv 2025年

作者： Xu, Hongsheng Zhan, Meng State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key Laboratory School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

In the transient stability analysis of renewable energy grid-tied systems, although a large amount of works have devoted to the detailed electromagnetic transient simulation and the stability analyses of during-fault stage, the whole low-voltage ride through (LVRT) process and relevant transient stability mechanism remain to be uncovered. Taking the doubly fed induction generator system as the objective, this paper divides the transient processes into four different stages, including the pre-fault, during-fault, early post-fault, and late post-fault ones, establishes the full mechanism models for each stage, and studies the switching dynamics in detail. It is found that the during-fault dynamics can be determined by the phase-lock loop second-order equation within the framework of the generalized swing equation (GSE). For the early post-fault stage, it can be treated as a series of quasi-steady states and its dominant driving system dynamics can still be described by the GSE. Based on the local dynamics of unstable equilibrium point, the system transient stability can be completely determined by whether the initial state of the early post-fault stage is within or out of its basin of attraction (BOA). Based on these observations, the BOA-based and equal area criterion (EAC)-based transient stability assessment methods are developed, which are supported by broad numerical simulations and hardware-in-the-loop experiments. This work provides a clear physical picture and perfectly solves the difficult stability analysis problem when severe faults and LVRT have to be considered in most of DFIG engineering situations. Copyright © 2025, The Authors. All rights reserved.

关键词： Transient stability

来源：评论

学校读者我要写书评

暂无评论

Experimental evidence of aligning the m = 2/1 locked mode by RMP for improvement of mode suppression efficiency with electron cyclotron wave on J-TEXT

引用

The European Physical Journal Special Topics 2025年 1-15页

作者： Fang, Jiangang Chen, Zhongyong Yan, Wei Wang, Nengchao Mao, Feiyue Xuan, Zijian Ren, Zhengkang Chen, Xixuan Xia, Donghui Yang, Zhoujun Chen, Zhipeng Ding, Yonghua 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 Wuhan People’s Republic of China

Stabilization of tearing modes, neoclassical tearing modes, and the locked modes (LMs) are of great importance for the tokamak plasma operation. The LMs will lead to the degradation of plasma confinement, which may cause major disruptions. The m/n = 2/1 LM islands have been completely suppressed by combination of electron cyclotron wave (ECW) and the externally applied resonant magnetic perturbation (RMP) on J-TEXT. The RMP is employed to control the phase of the 2/1 LMs and align the island’s O-point with the ECW deposition region. The J-TEXT experiment indicates that the 2/1 LM island suppression strategy can reduce the ECW power required for the mode suppression compared the suppression strategy when the island is rotating. Local heating within the magnetic island plays dominant roles on the mode suppression. The electron temperature information inside the magnetic island is provided by the electron cyclotron emission imaging diagnostic when the island is locked by RMP. The experimental results show that the temperature perturbation at the island’s O-point is larger when the island’s O-point is locked at the ECW deposition position than that when the mode is rotating. The effect of the RMP phase on the 2/1 LM suppression by ECW have been investigated. The LM suppression is most effective when the ECW power is properly aligned with the island’s O-point. Disruption avoidance by the suppression of the 2/1 LMs using ECW has been achieved on J-TEXT.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A GNN-Guided Variable Selection Approach for Efficient Derivation of the Optimal Solution in Unit Commitment

引用

IEEE Transactions on Power Systems 2025年

作者： Wei, Lishen Ai, Xiaomeng Fang, Jiakun Cui, Shichang Liao, Shiwu Wen, Jinyu Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China TODE Co. Ltd. Nanjing210046 China

The growing scale of the power system has intensified the demand for computational efficiency in unit commitment (UC). This paper introduces a novel approach that addresses this issue by adopting graph neural networks (GNN) into the Branch and Bound (B&B), integrating the characteristics of variable selection (VS) within UC problems. Our method focuses on efficiently obtaining optimal solutions using the GNNguided VS approach. Specifically, we investigate the characteristics of the high-quality but time-consuming VS heuristic when solving UC problems. Then, the GNN incorporates these characteristics to make highquality VS decisions accurately and quickly. In the implementation, the UC model is solved using a highquality but time-consuming VS heuristic to collect training data. These data are employed to train the GNN model with designed label-smooth and depthadaptive mechanisms, which exploit these characteristics in UC problems for acceleration. To evaluate the effectiveness, we conduct various experiments on the IEEE118, RTS-GMLC, and a real-world provincial system in China. The overall performance demonstrates significant improvements (4.6x, 1.5x, and 1.8x, respectively) in computational efficiency. The comparison experiments show that the proposed mechanisms contribute to enhanced learning performance and, thus, further UC acceleration. Moreover, our approach exhibits promising generalization capabilities. © 1969-2012 IEEE.

关键词： Graph neural networks

来源：评论

学校读者我要写书评

暂无评论

Adaptive restart scheme for HVDC transmission system based on voltage injection

Adaptive restart scheme for HVDC transmission system based o...

引用

18th International Conference on Developments in Power System Protection (DPSP APAC 2025)

作者： Ruizhi Ma Yu Chen Minghao Wen Ke Han State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 People's Republic of China

ISBN: (数字)9781837242900

Rapid restarting of high-voltage DC transmission system after a fault is crucial for the stable and reliable operation of the system. Conventional restart methods have the disadvantages of blindness, long restart process, and high restart failure rate. Restarting on permanent fault will cause more impact on the system or lead to system shutdown. To solve this problem, this paper proposes an adaptive restart scheme based on voltage injection. First, a fault property identification mode based on open-loop voltage control and closed-loop current control is proposed to be incorporated into the LCC control system. Secondly, the change rule of line voltage and current in the fault identification stage is analyzed based on the equivalent circuit diagram of the system under temporary and permanent faults. Finally, an adaptive restart scheme for HVDC transmission system based on voltage injection is proposed. The proposed scheme realizes the injection of voltage signals into the system after fault isolation while limiting the system current, which improves the safety of the system during fault restart. The proposed scheme can be realized based on the existing control system without additional equipment. The scheme has good noise and interference immunity, and its realization has a low sampling rate requirement, which has a good prospect for engineering applications. An electromagnetic transient model of the LCC-HVDC transmission system is constructed in PSCAD/EMTDC based on the engineering parameters, and simulations are carried out for verification. The simulation results show that the proposed scheme can correctly recognize the property of faults and can realize the restart of the system after the fault.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Lifecycle Synergistic Prelithiation Strategy of Both Anode and Cathode for High-Performance Lithium-Ion Batteries

引用

advanced Energy Materials 2025年第0期

作者： Zhong, Wei He, Renjie Peng, Linfeng Liu, Wei Peng, Jiayue Zhu, Haolin Xiang, Jingyu Cheng, Shijie Xie, Jia State Key Laboratory of Materials Processing and Die & Mould Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan430074 China

Prelithiation is recognized as an effective technology for addressing the depletion of active lithium, but conventional methods are constrained by their reliance on singular lithium replenishment mechanisms and limited functionality. Herein, a synergistic and comprehensive lifecycle prelithiation technology is introduced as applicable to both anode and cathode. For anode prelithiation, highly reactive biphenyl lithium is leveraged as a lithium replenishing agent, supplemented by functional additives, ethoxy(pentafluoro)cyclotriphosphazene (PFPN) and fluoroethylene carbonate (FEC), to generate a robust SEI enriched with Li3N, LiF, Li3P and Li2O. This approach not only compensates for the initial active lithium loss but also fortifies the structural integrity of the SEI. For cathode prelithiation, the high-capacity lithium replenisher Li2C2O4 and Li2C4O4 comprising B, N double-doped carbon loaded Mo2C-W2C (Mo-W@BNC) heterogeneous catalysts is employed, which exhibits superior catalytic performance in facilitating the release of lithium. The exceptional efficient liberations of lithium are achieved at discharge voltages of 3.78 V and 4.14 V for Li2C2O4 and Li2C2O4, respectively. The prelithiation for both anode and cathode mitigates the initial active lithium loss by 22.6%. Moreover, a singular activation during subsequent usage contributes an additional 0.8 mAh cm−2 of active lithium, achieving a capacity retention of 99.3% after 250 cycles at 0.5C. © 2025 Wiley-VCH GmbH.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Unlocking Spatio-Temporal Flexibility of Data Centers in Multiple Regional Peer-to-Peer Energy Transaction Markets

引用

IEEE Transactions on Power Systems 2025年

作者： Jin, Tianyu Bai, Linquan Yan, Mingyu Chen, Xinyu Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China University of North Carolina at Charlotte William States Lee College of Engineering CharlotteNC28223 United States

Recently, the growth of distributed energy resources (DERs) has aroused peer-to-peer (P2P) energy transaction. With abundant flexibility of shifting computational tasks, data centers could participate in the P2P energy transaction market. However, the revenue that one data center receives through participating in regional P2P markets may conflict with that of the whole company owning several geographical data centers. Furthermore, the market clearing would be more complex after considering the latency characteristics of data centers and privacy protection in P2P transactions. This paper proposes an integrated multiple regional P2P energy transaction (MRPET) model, unlocking both the spatial and temporal flexibility of data centers in P2P trading. The detailed models of data centers, especially considering the total delay in processing tasks, are constructed, as well as several operational constraints of prosumers and P2P energy transaction. A two-stage algorithm based on Alternating Direction Method of Multipliers (ADMM) is proposed for joint clearing of the MRPET markets. The proposed models and algorithm are examined in test systems and the results show that more renewable generation could be locally consumed with the re-dispatch of multiple data centers. Reduced costs are achieved for both the data center company and prosumers. The case study also analyzes the impact of task variation and delay cost on the schedule of data centers and market clearing. © 1969-2012 IEEE.

关键词： Commerce

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：