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Optimal Scheduling of Distribution Network Incorporating Topology Reconfiguration,Battery Energy System and Load Response

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CSEE Journal of Power and Energy Systems 2022年第3期8卷 743-756页

作者： Xuebo Qiao Yuyao luo Juanxia Xiao Yong Li Li Jiang Xia Shao Jiazhu Xu yi Tan yijia Cao College of Electrical and Information Engineering Hunan UniversityChangsha410082China State Grid Shaoyang Customer Service Center State Grid Shaoyang Power Supply CompanyShaoyang422000China

Distributed generation(DG)is becoming increasingly important due to the serious environmental pollution caused by conventional fossil-energy-based generation and the depletion of non-renewable *** the flexible resources in the active distribution network(ADN),battery energy system(BES)and responsive load(RL)are all able to assist renewable DG integration in day-ahead *** addition,the security and economic level can be significantly improved by adjusting network ***,in this paper,a coordinated day-ahead scheduling method incorporating topology reconfiguration,BES optimization and load response is presented to minimize the total day-ahead operational costs in the *** current injection models are presented for renewable DG,RL and BES based on the linear power flow model,and an extensible linear switching operations calculation(ELSOC)method is proposed to address the network ***,a mixed integer linear programming(MILP)model is proposed for optimal coordinated operation of an *** correctness and effectiveness of the proposed method are demonstrated by simulations on a modified test *** addition,the combined scenario and Monte-Carlo method is used to handle the uncertainties of loads and DGs,and the results of different uncertainties can further verify the feasibility of the proposed model.

关键词： Active distribution network battery energy system linearized current injection models mixed integer linear programming network topology reconfiguration responsive load

城市群绿色技术创新对碳排放的影响——基于人力资本的调节效应

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自然资源学报 2024年第9期39卷 2121-2139页

作者：吴康耿一睿郭涛首都经济贸易大学城市经济与公共管理学院北京100070 城市群系统演化与可持续发展的决策模拟北京市重点实验室北京100070

“双碳”目标下,绿色技术创新在权衡经济高质量发展与降碳目标方面发挥重要作用。基于2006—2021年中国19个城市群地区的209个地级市面板数据,在刻画绿色技术创新与碳排放时空演变格局基础上,实证探究了绿色技术创新对碳排放的非线性影... 详细信息

“双碳”目标下,绿色技术创新在权衡经济高质量发展与降碳目标方面发挥重要作用。基于2006—2021年中国19个城市群地区的209个地级市面板数据,在刻画绿色技术创新与碳排放时空演变格局基础上,实证探究了绿色技术创新对碳排放的非线性影响,并讨论了人力资本对该影响的调节效应。研究发现:(1)2006—2021年中国城市群绿色技术创新水平整体呈上升趋势,碳排放增速先增后降,且绿色技术创新水平较高的城市群碳排放增速明显低于创新水平较低的城市群;(2)绿色技术创新影响碳排放呈先促进后抑制的倒“U”型关系,且受城市群等级、地理区位、低碳政策、城市产业结构以及城市规模的影响;(3)人力资本对绿色技术创新影响碳排放存在显著调节作用,人力资本的增加一方面强化了倒“U”型曲线拐点前的正向作用和拐点后的负向作用,另一方面使绿色技术创新水平的降碳阈值右移。研究结论为“双碳”目标下以提升人力资本为抓手,充分发挥绿色技术创新的降碳效应,贯彻绿色低碳发展理念提供了理论支撑和经验证据。

关键词：绿色技术创新人力资本碳排放城市群

Electrodeposited transparent PEDOT for inverted perovskite solar cells:improved charge transport and catalytic performances

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Rare Metals 2021年第9期40卷 2402-2414页

作者： Cong-Tan Zhu ying Yang Fei-Yu Lin Yuan luo Shu-Peng Ma Liu Zhu Xue-yi Guo School of Metallurgy and Environment Central South UniversityChangsha 410083China First Rare Materials Co. LtdQingyuan 511517China

The acidic, corrosive effect of sodium polystyrene sulfonate(PSS) in poly 3,4-ethylenedioxythiophene:sodium polystyrene sulfonate(PEDOT:PSS) limits the stability of inverted perovskite solar cells(PSCs) based on the ITO/PEDOT:PSS/perovskite/PCBM/BCP/Ag structure. In this work, a poly 3,4-ethylenedioxythiophene(PEDOT) hole transport layer(HTL) with high hole mobility and good catalytic performance was prepared by electrochemical cyclic voltammetry(CV) method for inverted PSCs. By controlling the CV cycles(from 1 to 5 cycles) and EDOT monomer solution concentration(from0.5 to 2.0 mmol·L^(-1)) of electrochemical deposition, the thickness, morphology, optical and electrochemical properties of PEDOT could be accurately adjusted. The optimal photovoltaic performance with current density(J_(sc)) of 22.19 mA·cm^(-2), open circuit voltage(V_(oc)) of 0.94 V, fill factor(FF) of 0.65 and photoelectric conversion efficiency of 13.56% was obtained when deposition of PEDOT with 1 CV cycle and EDOT concentration of 0.5 mmol·L^(-1). At this point, the perovskite showed good crystallization,optimal optical, charge transport and recombination performance, resulting in better V_(oc)and photoelectric conversion efficiency(PCE) compared to the devices with higher CV cycle numbers and 3,4-ethylenedioxythiophene(EDOT) concentration. For comparison with spin-coated PEDOT:PSS, the device with electrodeposited PEDOT showed improved J_(sc)and comparable V_(oc), which may result from its better charge transport and catalytic *** device with spin-coated PEDOT:PSS showed photoelectric conversion efficiency of 12.25%, which was lower than that based on electrodeposited PEDOT(13.56%) with1 CV cycles and 0.5 mmol·L^(-1) EDOT concentration. And the device with electrodeposited PEDOT as HTLs showed more excellent air stability. In ambient air((32 ± 5) ℃ and RH: 70% ± 20%), it still maintained more than 80%of the initial photoelectric conversion efficiency after1000 h. In comparison, the photoe

关键词： Electrochemically cyclic voltammetry Inverted perovskite solar cells Electrodeposited PEDOT Hole mobility Tafel analysis

高亚洲冰川消融季遥感反照率与年际物质平衡相关性评估及分析

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遥感学报 2024年第6期28卷 1465-1479页

作者：刘易江利明张志敏李超中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室武汉430077 中国科学院大学北京100049 河南城建学院测绘与城市空间信息学院平顶山467036

冰川消融季反照率是表征冰川年际物质平衡变化的重要参数之一。高海拔亚洲地区(以下简称高亚洲)冰川类型多样且变化机制复杂,冰面反照率对不同类型冰川的年际物质平衡的表征能力及其区域特征还有待进一步认识。本文基于2000年—2019年MO... 详细信息

冰川消融季反照率是表征冰川年际物质平衡变化的重要参数之一。高海拔亚洲地区(以下简称高亚洲)冰川类型多样且变化机制复杂,冰面反照率对不同类型冰川的年际物质平衡的表征能力及其区域特征还有待进一步认识。本文基于2000年—2019年MODIS冰雪反照率产品和物质平衡时间序列观测数据,分析了高亚洲23条冰川4种消融季反照率参数的变化特征,评估了不同反照率参数与年际物质平衡的相关性,并探讨了反照率变化对不同地区和不同类型冰川的年际物质平衡的影响。结果表明近20年内除喜马拉雅西段和祁连山地区的冰川外,其他冰川的反照率均呈下降趋势,消融季最小反照率波动大于平均反照率,后者在相同冰川子区内的年际变化和长期趋势较为一致;共计13条冰川的反照率与年际物质平衡呈现显著线性正相关关系(P<0.05),4种反照率参数中8天合成产品的平均反照率相关性最优;反照率与年际物质平衡线性关系在不同冰川子区和冰川类型中均无明显的区域性分布规律。本文研究可为加深认识冰雪反照率对高亚洲冰川物质平衡的影响规律提供有益参考。

关键词：遥感冰川反照率冰川物质平衡 MODIS冰雪反照率高亚洲

高速道岔组装式滑床台板传力特征及服役性能研究

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铁道学报 2024年第2期46卷 131-139页

作者：易强王树国杨东升谷永磊中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 京沪高速铁路股份有限公司北京100038

为探明高速铁路道岔基本轨轨底疲劳伤损原因,开展组装式滑床台板传力特征及服役性能研究。建立转辙器基本轨受力分析模型,研究两点与平面扣压式滑床台板条件下基本轨轨底应力特征,结合基本轨轨底材质疲劳试验与转辙器组装疲劳试验,评估... 详细信息

为探明高速铁路道岔基本轨轨底疲劳伤损原因,开展组装式滑床台板传力特征及服役性能研究。建立转辙器基本轨受力分析模型,研究两点与平面扣压式滑床台板条件下基本轨轨底应力特征,结合基本轨轨底材质疲劳试验与转辙器组装疲劳试验,评估两点与平面扣压式滑床台板对基本轨服役性能的影响。结果表明:两点扣压式滑床台板使得基本轨轨底形成应力集中,且扣压点对应的轨底下表面以受拉为主;130~190 kN疲劳荷载条件下,两点扣压式滑床台板可使得基本轨轨底最大应力达611.2 MPa,已经超出基本轨轨底疲劳极限,而平面扣压式滑床台板对应的基本轨轨底最大应力为237.5 MPa,相对两点扣压结构降低50%~60%;转辙器结构组装状态对基本轨服役性能影响显著,基本轨轨底应力与尖轨-滑床台接触状态密切相关。

关键词：高速道岔基本轨疲劳滑床台板传力特征疲劳试验

Kinetics, thermodynamics, and equilibrium of As(Ⅲ),Cd(Ⅱ), Cu(Ⅱ) and Pb(Ⅱ) adsorption using porous chitosan bead-supported MnFe_(2)O_(4) nanoparticles

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International Journal of Mining Science and Technology 2021年第6期31卷 1107-1115页

作者： Hongxia Li Hongbing Ji Xinglan Cui Xiaokui Che Qidong Zhang Juan Zhong Rongzhen Jin Lei Wang yi luo National Engineering Research Center for Environment-friendly Metallurgy in Producing Premium Non-ferrous Metals GRINM Resources and Environmental Technology Corporation LimitedBeijing 101407China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing 100083China GRINM Group Corporation Limited Beijing 100088China GRIMAT Engineering Institute Corporation Limited Beijing 100088China

A novel porous nanocomposite,cross-linked chitosan and polyethylene glycol(PEG) bead-supported MnFe_(2) O_(4) nanoparticles(CPM),was developed as an efficient adsorbent to remove metalloid(As(Ⅲ))and heavy metals(Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ)).The characteristics of CPM showed a porous structure,well dispersed MnFe_(2) O_(4),and several of hydroxyl and amino groups(-OH,-NH_(2)).Batch experiments demonstrated that the best adsorption property of As(Ⅲ),Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ) was achieved within 8 h with maximum adsorption capacities of 9.90,9.73,43.94,and 11.98 mg/g,*** and synergistic effects(particularly precipitation) were included in the co-adsorption mechanism of As(Ⅲ) and heavy ***,As(Ⅲ) was partly oxidized by MnFe_(2) O_(4) to As(V),and both were coordinated on MnFe_(2) O_(4) ***(Ⅱ) could also bind to MnFe_(2) O_(4) by ion exchange and electrostatic ***,Cd(Ⅱ) and Cu(Ⅱ) tended to be coordinated on ***,CPM can serve as a remediation material for water and soil co-contaminated with As(Ⅲ) and heavy metals.

关键词： Equilibrium Adsorption Arsenic Cadmium Chitosan MnFe_(2)O_(4)nanoparticles

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液相电子显微镜解析高分子动态过程

高分子学报 2024年第2期55卷 235-254页

作者：张德逸李佳烨许准王欢北京大学化学与分子工程学院北京分子科学国家研究中心教育部高分子化学与物理重点实验室北京100871

电子显微镜被广泛用于表征高分子的形态、晶态结构、机械性质及组装行为,其在溶液态高分子的动态过程研究的应用中刚刚起步.近年来,由于在电镜真空腔中能稳定封存液体样品的纳米技术的发展以及对电子束与样品的作用机制的逐渐清晰,液相... 详细信息

电子显微镜被广泛用于表征高分子的形态、晶态结构、机械性质及组装行为,其在溶液态高分子的动态过程研究的应用中刚刚起步.近年来,由于在电镜真空腔中能稳定封存液体样品的纳米技术的发展以及对电子束与样品的作用机制的逐渐清晰,液相电镜实验实现了对溶液态高分子的高时空分辨、原位、实时、时空的“分子录影”.单分子原位成像实验提供了新的机遇去探索被传统系综测量掩盖的分子动力学行为.我们总结了液相电镜技术在高分子单链物理性质、单分子反应、组装体与组装行为、相分离等领域的研究进展,阐述了其中实验难点以及核心技术突破,详细讨论了电子束与样品相互作用和单分子成像实验揭示的关于高分子科学的新现象、新问题和新思考.最后,展望了突破目前纳米级空间分辨率和百毫秒时间分辨率可行的方案、面临的挑战和所需的技术支持,以及该目标实现后将给我们带来新的研究机遇.

关键词：液相电镜高分子动力学单分子成像图像处理

Electron density measurement by the three boundary channels of HCOOH laser interferometer on the HL-3 tokamak

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Plasma Science and Technology 2024年第3期26卷 88-93页

作者：牟俊任李永高李远王再宏丁宝钢王浩西易江石中兵 Southwestern Institute of Physics Chengdu 610041People's Republic of China East China Normal University Shanghai 200241People's Republic of China

Far-infrared(FIR)interferometer is widely used to measure the electron density in the magnetically confined fusion plasma devices.A new FIR laser interferometer with a total of 13 channels(8 horizontal channels and 5 oblique channels)is under development on the HL-3tokamak by using the formic-acid laser(HCOOH,f=694 GHz).In order to investigate the boundary electron density activity during the divertor discharge,three horizontal interferometry channels located at Z=-97,-76,76.5 cm have been successfully developed on HL-3 in 2023,and put into operation in recent experimental campaign,with a time resolution of1.0μs and lineintegrated electron density resolution of~7.0×10^(16) m^(-2).This paper mainly focuses on the optical design of the three-channel interferometry system,as well as optical elements and recent experimental result on HL-3.

关键词： electron density interferometer HL-3

附加用水量对再生砂混凝土工作性和力学性能的影响

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材料导报 2024年第1期38卷 98-104页

作者：李北星陈鹏博殷实易浩武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070

再生砂掺量和附加用水量对新拌和硬化再生砂混凝土的性能有重要影响。本工作制备了再生砂掺量(γRFA)为30%、50%、70%、100%(质量分数,下同),附加用水量补偿系数(kwa)为0.6、0.75、0.9、1.0的16组再生砂混凝土,测试了这些再生砂混凝土... 详细信息

再生砂掺量和附加用水量对新拌和硬化再生砂混凝土的性能有重要影响。本工作制备了再生砂掺量(γRFA)为30%、50%、70%、100%(质量分数,下同),附加用水量补偿系数(kwa)为0.6、0.75、0.9、1.0的16组再生砂混凝土,测试了这些再生砂混凝土的工作性(坍落度、扩展度与扩展时间)与力学性能(抗压、劈拉强度与弹性模量),分析了kwa和γRFA对再生砂混凝土性能的影响规律,获得了kwa的合理取值范围。结果表明,随着kwa的降低,再生砂混凝土的工作性下降,力学性能增大;γRFA对混凝土力学性能的影响与附加用水量有关,在中低附加用水量(kwa=0.6、0.75)条件下,随着γRFA的增加,再生砂混凝土的部分力学性能指标增大且其值高于天然砂混凝土,而在高附加用水量(kwa=0.9、1.0)下,再生砂混凝土的力学性能随着γRFA的增加呈线性降低。γRFA低于50%对再生砂混凝土力学性能的影响较小,kwa值在0.75~0.9范围变化对再生砂混凝土工作性能与力学性能的影响均相对较小。

关键词：再生混凝土再生砂附加用水量工作性能力学性能