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1st International Conference on Cyber-energy Systems and Intelligent energy, ICCSIE 2022

作者： Li, Zibin Tan, Mao Ren, Yuling Jiang, Hongwei Xiangtan University School of Automation and Electronic Information Xiangtan China Xiangtan University Hunan Engineering Research Center of Multi-energy Cooperative Control Technology Xiangtan China Xiangtan University Hunan National Center for Applied Mathematics Xiangtan China

ISBN: (纸本)9781665452151

The strong uncertainty of renewable energy output and load demand makes the stable operation of microgrids a challenging and important issue. However, the scheduling methods based on deterministic models cannot accurately describe the influence of uncertainties on operation of microgrids. To address this problem, this paper proposes a two-stage adaptive robust optimal scheduling model (TSARO) that considers both source and load uncertainties. The model first adopts the dirichlet process mixture model (DPMM) to perform cluster analysis and parameter estimation on massive historical data, and constructs a data-driven uncertainty set of source and load. Then, based on the uncertainty set, the TSARO model aiming at minimizing the microgrid operation cost is developed under the worst-case scenario. Finally, this paper solves the optimization model using column constraint generation algorithm (C&CG) to obtain the day-ahead power dispatching plan. Simulation results show that the proposed model in this paper has better economic benefits compared with several classical optimization models. © 2023 IEEE.

关键词： Cluster analysis

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A non-intrusive load identification method considering unknown loads 1

A non-intrusive load identification method considering unkno...

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1st International Conference on Cyber-energy Systems and Intelligent energy, ICCSIE 2022

作者： Xiao, Jun Tan, Mao Gong, Yaqing Liao, Chengchen Xiangtan University School of Automation and Electronic Information Xiangtan China Xiangtan University Hunan National Center for Applied Mathematics Xiangtan China Xiangtan University Hunan Engineering Research Center of Multi-energy Cooperative Control Technology Xiangtan China

ISBN: (纸本)9781665452151

The current non-intrusive recognition model has complex input features and model structure. In addition, it usually can only identify known loads in training dataset and cannot identify unknown loads that are outside the training dataset, which makes it difficult to be applied to dynamic user-side monitoring environment. To this end, we propose a non-intrusive load identification method considering unknown loads - One Class Load Identification Network(OC-LIN), which can accurately identify both known and unknown loads. The proposed method consists of two main parts: (1) a load identification network that accurately identify loads using fusion V-I trajectory feature and odd harmonic amplitude feature;(2) an one class method in deep support vector data description (DSVDD) to identify unknown loads. Through the validation of the PLAID 2018 dataset, the proposed method not only identifies the unknown loads efficiently, but also improves the identification precision among the known loads. © 2023 IEEE.

关键词： Data description

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Fire Status Sensing of Oil-immersed Power Transformers Based on TOPSIS Method and Combination Weighting of Game Theory 8

Fire Status Sensing of Oil-immersed Power Transformers Based...

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8th IEEE International Conference on energy Internet, ICEI 2024

作者： Pi, Xinyu Feng, Tao Xu, Xunjian Ouyang, Yi Wang, Yahui Su, Xingren State Grid Hunan Electric Power Company Disaster Prevention and Reduction Center State Key Laboratory of Disaster Prevention and Reduction for Power Grid Transmission and Distribution Equipment Changsha China Xiangtan University Hunan Engineering Research Center of Multi-Energy Cooperative Control Technology College of Automation and Electronic Engineering Xiangtan China

ISBN: (纸本)9798331523558

The oil-immersed power transformer plays a crucial role in ensuring the safe and stable operation of the entire power system, highlighting the significance of enhancing the precision of its fire detection Aiming at the problems of difficulty in status sensing and inaccurate sensing results of traditional oil-immersed transformer status sensing models, a fire status sensing model for oil-immersed power transformers based on TOPSIS (Technique for order preference by similarity to an ideal solution) method and combination weighting of game theory is proposed in this paper. The model combines subjective weighting with objective weighting, while using game theory to determine the subjective and objective weight coefficients, eliminating human influence, and the TOPSIS method determines the final status sensing results. The test data of oil-imm supplied by a power company serves as the verification and analysis sample. This paper focuses on the oil-immersed power transformer, a key equipment in the power system, and carries out research on fire state sensing, which promotes the progress of state sensing technology and is of great significance to ensure the safe and stable operation of the power system and the normal life of residents, and providing early warning of potential fires, which holds significant practical implications in engineering. © 2024 IEEE.

关键词： Fires

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Interactive Power Oscillation and Its Suppression Strategy for VSG-DSG Paralleled System in Islanded Microgrid

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Chinese Journal of Electrical engineering 2022年第4期8卷 113-124页

作者： Zhiyong Yuan Xia Shen Yingjie Tan Zhenhua Tan Jinyong Lei Electric Power Research Institute CSGGuangzhou 510663China National Electrical Energy Conversion and Control Engineering Technology Research Center Hunan UniversityChangsha 410082China

A virtual synchronous generator(VSG)can provide inertial support through renewables and energy *** generally operates in parallel with a diesel generator(DSG)in an islanded ***,unforeseen interactive power oscillations occur in the paralleled system when loads *** may also burn out the VSG owing to its low overcurrent *** mechanism and suppression strategy of the power oscillation of a VSG-DSG paralleled system are *** reveals that the interactive power oscillation is caused essentially by the physical difference and parameter mismatch between the VSG and ***,the elimination condition of oscillation generation is ***,a comprehensive suppression control strategy based on virtual inductance and dynamic mutual damping technology is ***,the experimental results verify the effectiveness of the proposed method.

关键词： Islanded microgrid VSG-DSG paralleled system oscillation mechanism virtual inductance dynamic mutual damping suppression strategy

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A method for establishing a bearing residual life prediction model for process enhancement equipment based on rotor imbalance response analysis

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Chinese Journal of Chemical engineering 2024年第2期66卷 203-215页

作者： Feng Wang Haoran Li Zhenghui Zhang Yan Bai Hong Yin Jing Bian National Foundation Research Laboratory of Fault Prevention and Control in Hazardous Chemicals Production System Engineering Research Center of Chemical Technology SafetyBeijing University of Chemical TechnologyBeijing 100029China China Nuclear Power Engineering Co. LtdBeijing 100840China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin Key Laboratory of Energy and Chemical Explosion SafetyAcademician Expert Collaborative Innovation CenterTianjin 300131China

A rotating packed bed is a typical chemical process enhancement equipment that can strengthen micromixing and mass *** the operation of the rotating packed bed,the nonreactants and products irregularly adhere to the wire mesh packing in the rotor,thus resulting in an imbalance in the vibration of the rotor,which may cause serious damage to the bearing and material *** study proposes a model prediction for estimating the bearing residual life of a rotating packed bed based on rotor imbalance response *** method is used to determine the influence of the mass on the imbalance in the vibration of the rotor on bearing *** major influence on rotor vibration was found to be exerted by the imbalanced mass and its distribution radius,as revealed by the results of orthogonal *** implementing finite element analysis,the imbalance response curve for the rotating packed bed rotor was obtained,and a correlation among rotor imbalance mass,distribution radius of imbalance mass,and bearing residue life was established via data *** predicted value of the bearing life can be used as the reference basis for an early safety warning of a rotating packed bed to effectively avoid accidents.

关键词： Rotating packed bed Mass imbalance Harmonic response analysis Residual life Prediction model

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research on equivalent ice thickness monitoring model of overhead transmission lines based on representative span 3

Research on equivalent ice thickness monitoring model of ove...

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2024 3rd International Conference on New energy, energy Storage and Power engineering, NESP 2024

作者： Yin, Weihua Luo, Guocai Jian, Lingyun Liao, Tingjian Xiao, Qian Hunan Provincial Key Laboratory of Grids Operation and Control on Multi-Power Sources Area Shaoyang University Shaoyang422000 China Hunan Spec. Equipment Electric Energy Conversion and Control Engineering Technology Research Center Shaoyang University Shaoyang422000 China State Grid Hunan Province Electric Power Company Shaoyang Power Supply Branch Shaoyang422000 China

This paper aims to enhance the precision and efficiency of the calculation model for the equivalent icing thickness of tangent towers. The current calculation model for equivalent icing thickness of transmission lines lacks consideration of the influence of representative spans and controlled meteorological conditions. It also overlooks the impact of the concentrated load of the tension insulator string on the suspension shape of the conductor, as well as the compensatory capability of the suspension insulator string to counteract stress on the overhead transmission lines when deflected, resulting in calculation deviations. To resolve these issues, this paper investigates the dynamic characteristics of transmission line parameters and proposes a calculation model for equivalent icing thickness based on the representative span. The improved model demonstrates enhanced efficiency and accuracy in measuring the equivalent icing thickness for on-line icing-monitoring of transmission lines. Experimental results confirm a reduction in relative error compared to reference values, with the relative error gradually decreasing as ice thickness increases, indicating enhanced accuracy. The efficacy of this model is substantiated through experiments, offering a more efficient and precise method for monitoring ice thickness in engineering applications. © Published under licence by IOP Publishing Ltd.

关键词： Ice

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Pyrometallurgical recycling of spent lithium-ion batteries from conventional roasting to synergistic pyrolysis with organic wastes

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Journal of energy Chemistry 2023年第10期85卷 547-561,I0014页

作者： Chao Pan Yafei Shen China Energy Science and Technology Research Institute Co.Ltd. Nanjing 210023JiangsuChina Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC) Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044JiangsuChina

The synergistic pyrolysis has been increasingly used for recycling spent lithium-ion batteries(LIBs)and organic wastes(hydrogen and carbon sources),which are in-situ transformed into various reducing agents such as H_(2),CO,and char via carbothermal and/or gas thermal *** with the conventional roasting methods,this“killing two birds with one stone”strategy can not only reduce the cost and energy consumption,but also realize the valorization of organic *** paper concluded the research progress in synergistic pyrolysis recycling of spent LIBs and organic *** the one hand,valued metals such as Li,Co,Ni,and Mn can be recovered through the pyrolysis of the cathode materials with inherent organic materials(e.g.,separator,electrolyte)or graphite *** the pyrolysis process,the organic materials are decomposed into char and gases(e.g.,CO,H_(2),and CH_(4))as reducing agents,while the cathode material is decomposed and then converted into Li_(2)CO_(3) and low-valent transition metals or their oxides via in-situ thermal *** formed Li_(2)CO_(3) can be easily recovered by the water leaching process,while the formed transition metals or their oxides(e.g.,Co,CoO,Ni,MnO,etc.)can be recovered by the reductant-free acid leaching or magnetic separation *** the other hand,organic wastes(e.g.,biomass,plastics,etc.)as abundant hydrogen and carbon sources can be converted into gas(e.g.,H_(2),CO,etc.)and char via *** cathode materials are decomposed and subsequently reduced by the pyrolysis gas and *** addition,the pyrolysis oil and gas can be upgraded by catalytic reforming with the active metals derived from cathode ***,great challenges are proposed to promote this promising technology in the industrial applications.

关键词： Synergistic pyrolysis Spent LIBs Biomass Recycling Reduction roasting

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The Thrust Fluctuation Resistance Weakend of Single-Stage Convex Stepped Auxiliary Tooth Structure PMLSM 13

The Thrust Fluctuation Resistance Weakend of Single-Stage Co...

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13th International Symposium on Linear Drives for Industry Applications, LDIA 2021

作者： Lan, Zhiyong Bin, Xie Hua, Luo Xun College of Automation and Electronic Information Xiangtan University XiangTan China Multi-Energy Collaborative Control Technology Hunan Engineering Research Center XiangTan China

ISBN: (纸本)9781728172101

Resistance is one of the reasons that causes the thrust fluctuation of the permanent magnet synchronous linear motor, and it has a significant impact on the application of the motor in the field of precision driving. For this reason, this paper proposes a permanent magnet linear synchronous motor with a single-stage convex stepped auxiliary tooth structure to reduce the thrust fluctuation caused by the end effect. First, the end magnetic resistance of SSC-PMLSM is analyzed based on the lateral force method, and the auxiliary tooth width when the motor magnetic end force is minimized and derived. Then, auxiliary tooth combined with the dislocation method to further reduce the thrust fluctuation of the motor. Finally, taking 6-slot 7-pole PMLSM as an example and, using finite element simulation and experiments, the results prove that this method can effectively weaken the magnetic resistance fluctuation. © 2021 IEEE

关键词： Permanent magnets

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Sulfhydryl-modified zeolite A with exceptional strontium adsorption selectivity

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Science China Chemistry 2025年第5期68卷 1847-1858页

作者： Lingyi Li Lanxing Ren Dong Wang Junchang Chen Qi Guo Yuting Zhao Fuqiang Zhao Linwei He Jie Li Wenqi Zhang Lijuan Song Long Chen Lixi Chen Bin Wang Lin Zhu Tao Duan Zhifang Chai Shuao Wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University School of Science Harbin Institute of Technology (Shenzhen) School of Chemistry and Chemical Engineering Hunan Province Key Laboratory for the Design and Application of Actinide ComplexesUniversity of South China Radioactive Waste Technology and Radiochemistry Research Department China Nuclear Power Technology Research Institute Co.Ltd. State Key Laboratory of Environment-Friendly Energy Materials School of National Defence Science & TechnologySouthwest University of Science and Technology

Efficient removal of trace radiostrontium from contaminated highly saline wastewater,such as seawater,remains a critical but challenging task due to the coexistence of large excess of hard cations like Na+,K+,Mg2+and particularly Ca2+,which shares similar physicochemical properties with Sr2+.Herein,we successfully boosted the selectivity by a sulfhydryl-functionalized NaA zeolite（SH-NaA） via ion exchange coupled with reinforced soft-soft interactions between sulfhydryl groups and Sr2+.Remarkably,SH-NaA achieved a 99.8%removal efficiency of Sr2+in the presence of a tenfold excess of Ca2+,with a distribution coefficient（Kd） of 4.98×10～5mL/*** effectiveness of SH-NaA in accurately capturing Sr2+was further validated by its superior dynamic adsorption performance in natural seawater compared to pristine NaA *** experiments highlighted SH-NaA’s exceptional Sr2+removal efficiency（qm=233.36 mg/g）,rapid adsorption kinetics（1 min）,superior decontamination depth（Kd=6.71×10～5mL/g）,and robust irradiation stability（400 kGy γ-ray）.X-ray photoelectron spectroscopy（XPS） and in situ Fouriertransform infrared（FTIR） analyses underscored the pivotal role of sulfhydryl groups in Sr2+*** functional theory（DFT） calculations revealed that the sulfhydryl-functionalized NaA zeolite exhibits the best selectivity toward Sr2+,with an interaction energy of-2.55 *** findings demonstrate that organic group functionalized zeolites hold significant promise for environmental remediation applications.

关键词： strontium selectivity adsorption seawater sulfhydryl NaA zeolite

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Bright and tunable emissive monodisperse CsPbI3@Cs4PbI6 nanocomposites via a precise and controllable dissolution−recrystallization method

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Nano research 2023年第1期16卷 1586-1594页

作者： Luyu Cao Bomei Liu Lin Huang Zhi Zhou Chong-Geng Ma Jian Zhang Jing Wang Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China College of Science Hunan Optical Agriculture Engineering Technology Research CenterHunan Agricultural UniversityChangsha 410128China CQUPT-BUL Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Engineering Research Center of Electronic Information Materials and Devices(Ministry of Education) Guangxi Key Laboratory of Information MaterialsGuangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China

Nowadays,due to uncontrolled synthesis and lack of more direct and systematic evidences,the photoluminescence origin of“zero-dimensional”Cs4PbI6 remains great controversy and the luminescence cannot be *** we propose a controllable dissolution-recrystallization method to synthesize“emissive”and“non-emissive”Cs4PbI6 nanocrystals(NCs)*** comparing“emissive”and“non-emissive”Cs4PbI6 NCs,it is clearly proved that the visible emission in“emissive”Cs4PbI6 NCs comes from embedded CsPbI3 quantum dots(QDs).It is found for CsPbI3@Cs4PbI6 nanocomposites,methyl acetate(MeAC)and cyclohexane play an important role in dissolution and recrystallization respectively to obtain Cs4PbI6 matrix and CsPbI3 *** from this two-step method,the as-synthesized CsPbI3@Cs4PbI6 nanocomposites with CsPbI3 QDs uniformly distributed in Cs4PbI6 matrix are bright with photoluminescence quantum yield(PLQY)up to 71.4%and exhibit improved stability than CsPbI3 ***,utilizing its formation mechanism,the size of embedded CsPbI3 QDs can be controlled by reasonable designing the“dissolution”process,so that the luminescence of this CsPbI3@Cs4PbI6 nanocomposites can be adjusted in a wide range from green to red(554–630 nm).Our finding not only provides a novel method for synthesizing tunable“emissive”Cs4PbI6 NCs,but also makes clear the photoluminescence origin of“emissive”Cs4PbI6.

关键词： CsPbI3@Cs4PbI6 dissolution-recrystallization nanocomposites tunable emission

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