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A Consortium Blockchain-enabled Double Auction Mechanism for Peer-to-peer Energy Trading among Prosumers

Protection and Control of Modern Power Systems 2024年第3期9卷 82-97页

作者： Shichang Cui Shuang Xu Fei Hu Yong Zhao Jinyu Wen Jinsong Wang the State Key Laboratory of Advanced Electromagnetic Engineering and Technology the School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China. the State Grid Hubei Electrical Power Co. Ltd.Economics Research InstituteWuhanChina. Huazhong University of Science and Technology the School of Electrical and Electronics Engineering HUST Case Western Reserve University ClevelandUSA IEEE

This paper investigates a double auction-based peer-to-peer(P2P)energy trading market for a community of renewable prosumers with private information on reservation price and quantity of energy to be traded.A novel competition padding auction(CPA)mechanism for P2P energy trading is proposed to address the budget deficit problem while holding the advantages of the widely-used Vickrey-Clarke-Groves *** illustrate the theoretical properties of the CPA mechanism,the sufficient conditions are identified for a truth-telling equilibrium with a budget surplus to exist,while further proving its asymptotical economic *** addition,the CPA mechanism is implemented through consortium blockchain smart contracts to create safer,faster,and larger P2P energy trading *** proposed mechanism is embedded into blockchain consensus protocols for high consensus efficiency,and the budget surplus of the CPA mechanism motivates the prosumers to manage the *** studies are carried out to show the effectiveness of the proposed method.

关键词： Blockchain smart contract budget double auction mechanism economic efficiency peer-to-peer energy trading prosumers

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Efficient and Stable Photoassisted Lithium‑Ion Battery Enabled by Photocathode with Synergistically Boosted Carriers Dynamics

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Nano-Micro Letters 2025年第3期17卷 440-454页

作者： Zelin Ma Shiyao Wang Zhuangzhuang Ma Juan Li Luomeng Zhao Zhihuan Li Shiyuan Wang Yazhou Shuang Jiulong Wang Fang Wang Weiwei Xia Jie Jian Yibo He Junjie Wang Pengfei Guo Hongqiang Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi’an 710072People’s Republic of China State Key Laboratory of Solidification Processing School of Materials Science and Engineering DepartmentNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063People’s Republic of China Key Laboratory of Applied Surface and Colloid Chemistry Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringNational Ministry of EducationShaanxi Normal UniversityXi’an 710119People’s Republic of China

Efficient and stable photocathodes with versatility are of significance in photoassisted lithium-ion batteries(PLIBs),while there is always a request on fast carrier transport in electrochemical active *** work proposes a general approach of creating bulk heterojunction to boost the carrier mobility of photocathodes by simply laser assisted embedding of plasmonic *** employed in PLIBs,it was found effective for synchronously enhanced photocharge separation and transport in light charging ***,experimental photon spectroscopy,finite difference time domain method simulation and theoretical analyses demonstrate that the improved carrier dynamics are driven by the plasmonic-induced hot electron injection from metal to TiO_(2),as well as the enhanced conductivity in TiO2 matrix due to the formation of oxygen vacancies after Schottky *** from these merits,several benchmark values in performance of TiO2-based photocathode applied in PLIBs are set,including the capacity of 276 mAh g^(−1) at 0.2 A g^(−1) under illumination,photoconversion efficiency of 1.276%at 3 A g^(−1),less capacity and Columbic efficiency loss even through 200 *** results exemplify the potential of the bulk heterojunction strategy in developing highly efficient and stable photoassisted energy storage systems.

关键词： Photoassisted lithium-ion batteries Bulk heterojunction Carrier dynamics TiO2 nanofiber Plasmonic metal nanocrystals

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Enhanced Passivation Effect of Tunnel Oxide Prepared by Ozone-Gas Oxidation(OGO)for n-Type Polysilicon Passivated Contact(TOPCon)Solar Cells

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Energy & Environmental Materials 2025年第1期8卷 191-196页

作者： Lei Yang Yali Ou Xiang Lv Na Lin Yuheng Zeng Zechen Hu Shuai Yuan Jichun Ye Xuegong Yu Deren Yang State Key Lab of Silicon and Advanced Semiconductor Materials and School of Materials Science&Engineering Zhejiang UniversityHangzhou 310027China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311200China

Nowadays,a stack of heavily doped polysilicon(poly-Si)and tunnel oxide(SiO_(x))is widely employed to improve the passivation performance in n-type tunnel oxide passivated contact(TOPCon)silicon solar *** this case,it is critical to develop an in-line advanced fabrication process capable of producing high-quality tunnel SiO_(x).Herein,an in-line ozone-gas oxidation(OGO)process to prepare the tunnel SiO_(x) is proposed to be applied in n-type TOPCon solar cell fabrication,which has obtained better performance compared with previously reported in-line plasma-assisted N2O oxidation(PANO)*** order to explore the underlying mechanism,the electrical properties of the OGO and PANO tunnel SiO_(x) are analyzed by deep-level transient spectroscopy ***,continuous interface states in the band gap are detected for OGO tunnel SiO_(x),with the interface state densities(D_(it))of 1.2×10^(12)–3.6×10^(12) cm^(-2) eV^(-1) distributed in Ev+(0.15–0.40)eV,which is significantly lower than PANO tunnel SiO_(x).Furthermore,X-ray photoelectron spectroscopy analysis indicate that the percentage of SiO_(2)(Si^(4+))in OGO tunnel SiO_(x) is higher than which in PANO tunnel SiO_(x).Therefore,we ascribe the lower D_(it) to the good inhibitory effects on the formation of low-valent silicon oxides during the OGO *** a nutshell,OGO tunnel SiO_(x) has a great potential to be applied in n-type TOPCon silicon solar cell,which may be available for global photovoltaics industry.

关键词： interface states ozone-gas oxidation silicon solar cells tunnel oxide passivation contact(TOPCon)

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A New Device Concept of Magnetic Confinement Deuterium-Deuterium Fusion

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Chinese Physics Letters 2023年第10期40卷 39-43页

作者：潘垣武松涛王之江陈志鹏许敏饶波朱平杨勇张明丁永华夏冬辉 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 430074China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Southwestern Institute of Physics Chengdu 610041China

A two-stage cascade magnetic compression scheme based on field reversed configuration plasma is *** temperature and density of plasma before and after magnetic compression are *** addition,the suppression of the two-fluid effect and the finite Larmor radius effect on the tilting mode and the rotating mode of major magnetic hydrodynamic instability is studied,and finally,the key physical and engineering parameters of the deuterium-deuterium fusion pulse device are *** analysis shows that the fusion neutrons can be produced at an energy flux of more than 2 MW/m^(2)per year,which meets the material testing requirements for the fusion demonstration reactor(DEMO).If the recovery of magnetic field energy is taken into account,net energy outputs may be achieved,indicating that the scheme has a potential application prospect as a deuterium-deuterium pulse fusion energy.

关键词： scheme reversed rotating

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

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

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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

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Stretchable polymer composites with ultrahigh piezoelectric performance

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National Science Review 2023年第8期10卷 203-210页

作者： Tongxiang Tang Zhonghui Shen Jian Wang Shiqi Xu Jiaxi Jiang Jiahui Chang Mengfan Guo Youjun Fan Yao Xiao Zhihao Dong Houbing Huang Xiaoyan Li Yihui Zhang Danyang Wang Long-Qing Chen Ke Wang Shujun Zhang Ce-Wen Nan Yang Shen State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Center for Flexible Electronics Technology Tsinghua University School of Materials Science and Engineering University of New South Wales Department of Materials Science and Engineering The Pennsylvania State University State College Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of Wollongong

Flexible piezoelectric materials capable of withstanding large deformation play key roles in flexible electronics. Ferroelectric ceramics with a high piezoelectric coefficient are inherently brittle, whereas polar polymers exhibit a low piezoelectric coefficient. Here we report a highly stretchable/compressible piezoelectric composite composed of ferroelectric ceramic skeleton, elastomer matrix and relaxor ferroelectric-based hybrid at the ceramic/matrix interface as dielectric transition layers, exhibiting a giant piezoelectric coefficient of 250 picometers per volt, high electromechanical coupling factor keff of 65%,ultralow acoustic impedance of 3MRyl and high cyclic stability under 50% compression strain. The superior flexibility and piezoelectric properties are attributed to the electric polarization and mechanical load transfer paths formed by the ceramic skeleton, and dielectric mismatch mitigation between ceramic fillers and elastomer matrix by the dielectric transition layer. The synergistic fusion of ultrahigh piezoelectric properties and superior flexibility in these polymer composites is expected to drive emerging applications in flexible smart electronics.

关键词： polymer composites piezoelectric materials structure design flexible electronics

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Model Predictive Direct Power Control of Grid-connected Converters Considering Unbalanced Filter Inductance and Grid Conditions

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1279-1288页

作者： Weichen Yang Shihong Miao Zhiwei Liu Ji Han Yulong Xiong Qingyu Tu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key LaboratorySchool of Electrical and Electronic EngineeringHuazhong University of Science and Technology

The grid-connected converter(GCC) is widely used as the interface between various distributed generations and the utility grid. To achieve precise power control for GCC, this paper presents a model predictive direct power control(MPDPC)with consideration of the unbalanced filter inductance and grid conditions. First, the characteristics of GCC with unbalanced filter inductance are analyzed and a modified voltage control function is derived. On this basis, to compensate for the power oscillation caused by unbalanced filter inductance, a novel power compensation method is proposed for MPDPC to eliminate the DC-side current ripple while maintaining sinusoidal grid current. Besides, to improve the control robustness against mismatched filter inductance, a filter inductance identification scheme is proposed. Through this scheme, the estimated value of filter inductance is updated in each control period and applied in the proposed MPDPC. Finally, simulation results in PSCAD/EMTDC confirm the validity of the proposed MPDPC and the filter inductance identification scheme.

关键词： Inductance identification grid-connected converter model predictive control power oscillation elimination unbalanced grid conditions

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Pt single atoms coupled with Ru nanoclusters enable robust hydrogen oxidation for high-performance anion exchange membrane fuel cells

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Nano Research 2024年第7期17卷 6147-6156页

作者： Jianmei Wang Bingxing Zhang Xiaozhong Zheng Xuerui Liu Wei Guo Zhouxin Luo Yongfeng Liu Mingxia Gao Jian Chen Zhongbin Zhuang Hongge Pan Wenping Sun School of Materials Science and Engineering Zhejiang UniversityHangzhou 310058China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Lab of Organic–Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

The sluggish reaction kinetics of alkaline hydrogen oxidation reaction(HOR)is one of the key challenges for anion exchange membrane fuel cells(AEMFCs).To achieve robust alkaline HOR with minimized cost,we developed a single atom-cluster multiscale structure with isolated Pt single atoms anchored on Ru nanoclusters supported on nitrogen-doped carbon nanosheets(Pt1-Ru/NC).The well-defined structure not only provides multiple sites with varied affinity with the intermediates but also enables simultaneous modulation of different sites via interfacial *** addition to weakening Ru–H bond strength,the isolated Pt sites are heavily involved in hydrogen adsorption and synergistically accelerate the Volmer step with the help of Ru ***,this catalyst configuration inhibits the excessive occupancy of oxygen-containing species on Ru sites and facilitates the HOR at elevated *** Pt1-Ru/NC catalyst exhibits superior alkaline HOR performance with extremely high activity and excellent *** AEMFC with a 0.1 mg·cmPGM^(−2)loading of Pt1-Ru/NC anode catalyst achieves a peak powder density of 1172 mW·cm^(−2),which is 2.17 and 1.55 times higher than that of Pt/C and PtRu/C,*** work provides a new catalyst concept to address the sluggish kinetics of electrocatalytic reactions containing multiple intermediates and elemental steps.

关键词： nanoclusters multiscale structure hydrogen oxidation reaction electrocatalysis anion exchange membrane fuel cells

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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...

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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

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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...

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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

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