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Strategy for Enhancing the Available Capacity of Distribution Networks Considering Electric Vehicle Charging Modes

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Dianwang Jishu/Power System Technology 2025年第1期49卷 177-186页

作者： Chen, Peng Liu, Youbo Yuan, Chuan Tang, Donglai xiang, yue Liu, Junyong College of Electrical Engineering Sichuan University Sichuan Province Chengdu 610065 China State Grid Sichuan Electric Power Company Sichuan Province Chengdu 610041 China Aostar Information Technology Co. Ltd. Sichuan Province Chengdu 610067 China

The available capacity of distribution networks represents the maximum load capacity that can be accommodated under the existing conditions of the distribution network. It is an essential indicator for evaluating distribution networks' planning and operational effectiveness. This paper proposes a grid transformation method for distribution networks considering electric vehicle charging modes to address the significant decrease in available capacity caused by the large-scale disorderly charging of electric vehicles. By optimizing the grid topology and the optimal number, location, and type of line expansion and energy storage investment within the limited investment., the optimal enhancement of available capacity is achieved. Firstly, the Monte Carlo method is employed to generate scenarios of disorderly charging of electric vehicles, and an orderly electric vehicle charging model based on optimizing charging schedules is constructed. Secondly, a transformation model for enhancing the available capacity of distribution networks is developed based on the coordination of network reconfiguration, line expansion, and energy storage investment. Then, the complexity of the model is reduced using the Benders decomposition algorithm, and a commercial solver is employed for the solution. Finally, a case study based on a city's actual distribution network grid is conducted to validate the effectiveness of the proposed strategies for enhancing the available capacity. © 2025 Power System Technology Press. All rights reserved.

关键词： Monte Carlo methods

双阻尼模型调谐质量阻尼器在随机激励下的减震性能研究

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Efficient dynamic pruning on largest scores first (LSF) retrieval

工程力学 2025年第1期42卷 103-115页

作者：向越谭平贺辉陈倩敏广州大学土木工程学院广东广州510006 广州大学工程抗震减震与结构安全教育部重点实验室广东广州510006 湖南工学院土木与建筑工程学院湖南衡阳421002

该文提出黏滞阻尼与滞变阻尼共同作用的双阻尼模型调谐质量阻尼器(Dual Damping Tuned Mass Damper, DD-TMD)，并对白噪声作用下DD-TMD进行减震优化研究。讨论了DD-TMD的构成、优势和应用范围，并总结了DD-TMD的力学机理。提出适用于DD-... 详细信息

该文提出黏滞阻尼与滞变阻尼共同作用的双阻尼模型调谐质量阻尼器(Dual Damping Tuned Mass Damper, DD-TMD)，并对白噪声作用下DD-TMD进行减震优化研究。讨论了DD-TMD的构成、优势和应用范围，并总结了DD-TMD的力学机理。提出适用于DD-TMD的H2优化方法，并通过数值寻优得到了最优参数和基于稳定区域的DD-TMD参数优化方法。此外，通过DD-TMD的H2优化方法进一步得到了DD-TMD的等效附加黏滞阻尼比，为工程设计奠定应用基础。以变摩擦摆式调谐质量阻尼器(Variable Friction Pendulum Tuned Mass Damper, VFP-TMD)为DD-TMD的实际应用算例，通过20条地震波检验所提出的优化方法对地震激励的减震性能影响。结果表明：H2优化下的DD-TMD可以提供与常规黏滞阻尼TMD相当的控制效果。采用DD-TMD可以通过随机理论成功模拟与常摩擦阻尼等效的黏滞阻尼，并为带有初始摩擦的VFP-TMD提供有效可靠的优化设计方法。相较于前人所做的数值寻优方法，按照DD-TMD模型优化的VFP-TMD可以提供更加优异的减震控制效果且阻尼耗能能力提高了16.6%。

关键词：结构减震控制调谐质量阻尼器双阻尼模型 H2优化等效附加黏滞阻尼比

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Frontiers of Information Technology & Electronic Engineering 2016年第1期17卷 1-14页

作者： Kun JIANG yue-xiang YANG College of Computer National University of Defense Technology

Inverted index traversal techniques have been studied in addressing the query processing performance challenges of web search engines, but still leave much room for improvement. In this paper, we focus on the inverted index traversal on document-sorted indexes and the optimization technique called dynamic pruning, which can efficiently reduce the hardware computational resources required. We propose another novel exhaustive index traversal scheme called largest scores first(LSF) retrieval, in which the candidates are first selected in the posting list of important query terms with the largest upper bound scores and then fully scored with the contribution of the remaining query terms. The scheme can effectively reduce the memory consumption of existing term-at-atime(TAAT) and the candidate selection cost of existing document-at-a-time(DAAT) retrieval at the expense of revisiting the posting lists of the remaining query terms. Preliminary analysis and implementation show comparable performance between LSF and the two well-known baselines. To further reduce the number of postings that need to be revisited, we present efficient rank safe dynamic pruning techniques based on LSF, including two important optimizations called list omitting(LSF_LO) and partial scoring(LSF_PS) that make full use of query term importance. Finally, experimental results with the TREC GOV2 collection show that our new index traversal approaches reduce the query latency by almost 27% over the WAND baseline and produce slightly better results compared with the Max Score baseline, while returning the same results as exhaustive evaluation.

关键词： Inverted index, Index traversal, Query latency, Largest scores first (LSF) retrieval, Dynamic pruning

MECHANISM FOR VISCOELASTIC POLYMER SOLUTION PERCOLATING THROUGH POROUS MEDIA

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Journal of Hydrodynamics 2007年第2期19卷 241-248页

作者： ZHANG Li-juan yue xiang-an Ministry of Education Key Laboratory of Petroleum Engineering China University of Petroleum Beijing 102249 China

The pore throat of porous media is modeled as a constricted channel or expanded channel. The flow of viscoelastic polymer solution in pore throat model is studied by numerical method. Relationship between pressure drop and flow rate is developed, viscoelasticity and throat size are found to be two main factors in high flow resistance. According to pore throat model, 2-D stochastic channel bundle is put forward to model porous media, which is composed of pore throat models in series - parallel connection with size and length accord to Hating Greenkorn stochastic distribution. Percolation model of viscoelastic fluid is developed on the basis of Darcy equation and pressure drop vs. flow rate relation in 2-D stochastic channel bundle. Results indicate that the seepage ability of viscoelastic polymer solution decreases with the increase of viscoelasticity, injection rate, and heterogeneity as well as the decrease of mean pore size of porous media. The high pressure drop of viscoelastic fluid at the connection of pore to throat plays a great role in its anomalous high flow resistance through porous media.

关键词： polymer flooding viscoelastic fluid,flow resistance percolation pore throat

Edge-cloud Computing Systems for Smart Grid: State-of-the-art, Architecture, and Applications

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 805-817页

作者： Junlong Li Chenghong Gu yue xiang Furong Li Department of Electronic and Electrical Engineering University of BathBathUK College of Electrical Engineering Sichuan UniversityChengduChina

The quantity and heterogeneity of intelligent energy generation and consumption terminals in the smart grid are increasing drastically over the *** edge devices have created significant pressures on cloud computing(CC)system and centralised control for data storage and processing in realtime operation and *** integration of edge computing(EC)can effectively alleviate the pressure and conduct real-time processing while ensuring data *** paper conducts an extensive review of the EC-CC computing system and its application to the smart grid,which will integrate a vast number of dispersed *** first comprehensively describes the relationship among CC,fog computing(FC),and EC to provide a theoretical basis for the *** then introduces the architecture of the EC-CC computing system in the smart grid,where the architecture consists of both hardware structure and software platforms,and key technologies are introduced to support ***,the application to the smart grid is discussed across the whole supply chain,including energy generation,transportation(transmission and distribution networks),and ***,future research opportunities and challenges of EC-CC while being applied to the smart grid are *** paper can inform future research and industrial exploitations of these new technologies to enable a highly efficient smart grid under decarbonisation,digitalisation,and decentralisation transitions.

关键词： Smart grid edge computing fog computing cloud computing Internet of Things data fusion container technology

An Improved Fuzzy Method for Characterizing Wind Power

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 459-462页

作者： yue xiang Shuai Hu Junyong Liu Rui Wang College of Electrical Engineering Sichuan UniversityChengdu 610065China State Grid Ningxia Electric Power Eco-Tech Research Institute Yinchuan 750004China State Grid Hongguozi Power Supply Company Shizuishan 753204China

An improved fuzzy method is proposed to derive a fuzzy number for characterizing uncertain wind *** input measurement data are firstly converted into nested sets,and the fuzzy number is further obtained based on neste... 详细信息

关键词： Wind power fuzzy method uncertainty nested set

Agricultural Load Modeling Based on Crop Evapotranspiration and Light Integration for Economic Operation of Greenhouse Power Systems

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1113-1121页

作者： Zeming Li Junyong Liu yue xiang Xin Zhang Yanxin Chai College of Electrical Engineering Sichuan UniversityChengdu 610065China. Energy and Power Theme School of WaterEnergy and EnvironmentCranfield UniversityCranfield MK430ALUK.

The threat of environmental degradation attracts great attention to clean energy production and ***,the limited scope of energy consumption causes the large-scale of clean energy sources to be abandoned in Sichuan *** the meantime,the development of modern greenhouse cultivation has transformed the agriculture industry to develop a brand-new type of electrical load in the ***,the agricultural load can be used to consume the clean energy while facilitating plant *** this paper,an innovative agricultural load model is proposed based on crop evapotranspiration and daily light ***,the proposed agricultural load model is also applied to investigate the electricity consumption of five types of crop *** results illustrate that the power consumption is primarily driven by an artificial lighting compensation system.

关键词： Agriculture load model crop evapotranspiration model daily light integration model power consumption

Asymmetric Electrolytes Design for Aqueous Multivalent Metal Ion Batteries

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Nano-Micro Letters 2024年第3期16卷 227-253页

作者： Xiaochen Yang Xinyu Wang yue xiang Longtao Ma Wei Huang Frontiers Science Center for Flexible Electronics Institute of Flexible ElectronicsNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510641People’s Republic of China

With the rapid development of portable electronics and electric road vehicles,high-energy-density batteries have been becoming front-burner ***,homogeneous electrolyte cannot simultaneously meet diametrically opposed demands of high-potential cathode and low-potential anode,which are essential for high-voltage ***,homogeneous electrolyte is difficult to achieve bi-or multi-functions to meet different requirements of *** comparison,the asymmetric electrolyte with bi-or multi-layer disparate components can satisfy distinct requirements by playing different roles of each electrolyte layer and meanwhile compensates weakness of individual ***,the asymmetric electrolyte can not only suppress by-product sedimentation and continuous electrolyte decomposition at the anode while preserving active substances at the cathode for high-voltage batteries with long cyclic *** this review,we comprehensively divide asymmetric electrolytes into three categories:decoupled liquid-state electrolytes,bi-phase solid/liquid electrolytes and decoupled asymmetric solid-state *** design principles,reaction mechanism and mutual compatibility are also studied,***,we provide a comprehensive vision for the simplification of structure to reduce costs and increase device energy density,and the optimization of solvation structure at anolyte/catholyte interface to realize fast ion transport kinetics.

关键词： Asymmetric electrolyte Aqueous multivalent metal ion batteries Electrochemical stability windows Electrolyte interface

Active energy management strategies for active distribution system

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Journal of Modern Power Systems and Clean Energy 2015年第4期3卷 533-543页

作者： yue xiang Junyong LIU Wei YANG Cheng HUANG School of Electrical Engineering and Information Sichuan UniversityChengdu 610065China College of Electronics and Information Engineering Sichuan UniversityChengdu 610065China

Active energy management is an effective way to realize the flexible utilization of distributed energy resources to suit the characteristics of active distribution *** active energy management strategies need to be designed to coordinate the optimization of‘generation,network,load’.An active management model is built for the local distribution system integrated with the generation curtailment mechanism and the charging/discharging management of plug-in electric ***,different strategies based on the energy management model are *** model and strategies are tested and discussed in a modified distribution system,and the impacts with different load profiles are also analyzed.

关键词： Active distribution system Renewable generation Plug-in electric vehicles Active management