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Review of Networked Microgrid Protection:Architectures,Challenges,Solutions,and Future Trends

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 448-467页

作者： Jorge de la Cruz Ying Wu John E.Candelo-Becerra Juan C.Vasquez Josep M.Guerrero Center for Research on Microgrids(crom) Department of Energy TechnologyAalborg University9220 AalborgDenmark Facultad de Minas Departamento de Energia Eléctrica y AutomaticaUniversidad Nacional de ColombiaSede MedellinCarrera 80 No.65-223RobledoMedellin 050041Colombia. Center for Research on Microgrids at UPC(UPC crom) Department of Electronic EngineeringTechnical University of Catalonia(UPC)08019 Barcelona Spain ICREA Pg.Lluis Companys 2308010 BarcelonaSpain Center for Research on Microgrids at AAU(AAU crom) AAU EnergyAalborg University(AAU)9220 Aalborg EastDenmark

Design and selection of advanced protection schemes have become essential for reliable and secure operation of networked *** protection schemes that allow correct operation of microgrids have been proposed for individual systems in different topologies and ***,protection schemes for networked microgrids are still in devel-opment,and further research is required to design and operate advanced protection in interconnected *** of these microgrids in different nodes with various intercon-nection technologies increases fault occurrence and complicates protection *** paper aims to point out challenges in developing protection for networked microgrids,potential solutions,and research areas that need to be addressed for their ***,this article presents a systematic analysis of different microgrid clusters proposed since 2016,including several architectures of networked microgrids,operation modes,components,and utilization of renewable sources,which have not been widely explored in previous review ***,the paper presents a discussion on protection systems currently available for microgrid clusters,current challenges,and solutions that have been proposed for these ***,it discusses the trend of protection schemes in networked microgrids and presents some conclusions related to ***—Adaptive eprotection,microgrid cluster,microgrid,multiple microgrid,networked microgrid,real-time simulation,smart grid.

关键词： Adaptive eprotection microgrid cluster microgrid multiple microgrid networked microgrid real-time simulation smart grid

A shoe-box-sized 3D laser nanoprinter based on two-step absorption

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Light(Advanced Manufacturing) 2024年第2期5卷 115-122页

作者： Tobias Messer Michael Hippe Jingya(Lilyn)Gao Martin Wegener Institute of Applied Physics(APH) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Institute of Nanotechnology(int) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany

State-of-the-art commercially available 3D laser micro-and nanoprinters using polymeric photoresists based on two-or multi-photon absorption rely on high-power pico-or femtosecond lasers,leading to fairly large and expensive ***,we have introduced photoresists based on two-step absorption instead of two-photon absorption,allowing for the use of small and inexpensive continuous-wave 405 nm wavelength GaN semiconductor laser diodes with light-output powers below 1 ***,using the identical photoresist system and similar laser diodes,we report on the design,construction,and characterization of a 3D laser nanoprinter that fits into a shoe *** shoe box contains all optical components,namely the mounted laser,the collimation-and beam-shaping optics,a miniature MEMS xy-scanner,a tube lens,the focusing microscope objective lens(NA=1.4,100×magnification),a piezo slip-stick z-stage,the sample holder,a camera monitoring system,LED sample illumination,as well as the miniaturized control electronics employing a *** present a gallery of example 3D structures printed with this *** achieve about 100 nm lateral spatial resolution and focus scan speeds of about 1 mm/***,our shoe-box-sized system can be made orders of magnitude less expensive than today’s commercial systems.

关键词： Two-step absorption Direct laser writing 3D laser nanoprinters Micro-electro-mechanical-systems scanner 3D nanostructures

The Therapeutic Effects of Baicalein on the Hepatopulmonary Syndrome in the Rat Model of Chronic Common Bile Duct Ligation

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Journal of Clinical and Translational Hepatology 2024年第5期12卷 496-504页

作者： Ziyang Zeng Yuhao Lei Chunyong Yang Xianfeng Wu Liang Zhang Zhiyong Yang Lin Chen Xiaobo Wang Karine Belguise Yujie Li Bin Yi Department of Anesthesiology Southwest HospitalThird Military Medical UniversityChongqingChina Department of Anesthesiology Chongqing Traditional Chinese Medicine HospitalChongqingChina MCD Center de Biologie IntégrativeUniversitéde ToulouseCNRSUPSToulouseFrance

Background and Aims:Hepatopulmonary syndrome(HPS)is characterized by arterial oxygenation defects due to pulmonary vascular dilation in liver *** date,liver transplantation remains the only effective treatment for *** study aimed to explore the preventative role of baicalein in HPS ***:Sixty male rats were randomly assigned to three groups:sham,common bile duct ligation(CBDL),and baicalein,receiving intraperitoneal injections of baicalein(40 mg·kg􀃭1·d􀃭1,diluted in saline)for 21 *** rate,liver and kidney function,and bile acid metabolism levels were *** and lung angiogenesis and hepatic glycogen staining were assessed,and the expression of relevant proteins was evaluated by ***:Baicalein improved survival rates and hypoxemia in rats post-CBDL,reducing angiogenic protein levels and enhancing glucose *** to the untreated group,baicalein suppressed the expression of vascular endothelial growth factor,placental growth factors,matrix metalloprotease 9 and C-X-C motif chemokine 2,and it increased the expression of glycemic regulatory proteins,including dipeptidyl peptidase-4,sirtuin 1,peroxisome proliferatoractivated receptor gamma co-activator 1􀄮,and 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase ***:Baicalein significantly improves hepatic function and hypoxia in HPS rats by attenuating pathological angiogenesis in the liver and lungs,showing promise as a treatment for HPS.

关键词： Baicalein Hepatopulmonary syndrome Common bile duct ligation Angiogenesis Glucose metabolism Liver fibrosis Glycolysis

A multi-photon(7×7)-focus 3D laser printer based on a 3D-printed diffractive optical element and a 3D-printed multi-lens array

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Light(Advanced Manufacturing) 2024年第1期5卷 26-39页

作者： Pascal Kiefer Vincent Hahn Sebastian Kalt Qing Sun Yolita M.Eggeler Martin Wegener DMM2O-Cluster of Excellence Karlsruhe Institute of Technology(KIT)and Heidelberg University76128 KarlsruheGermany Institute of Applied Physics(APH) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Institute of Nanotechnology(int) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Laboratory for Electron Microscopy(LEM) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany

One of the challenges in the field of multi-photon 3D laser printing lies in further increasing the print speed in terms of voxels/***,we present a setup based on a 7×7 focus array(rather than 3×3 in our previous work)and using a focus velocity of about 1 m/s(rather than 0.5 m/s in our previous work)at the diffraction limit(40×/NA1.4 microscope objective lens).Combined,this advance leads to a ten times increased print speed of about 108 voxels/*** demonstrate polymer printing of a chiral metamaterial containing more than 1.7×10^(12) voxels as well as millions of printed microparticles for potential pharmaceutical *** critical high-quality micro-optical components of the setup,namely a diffractive optical element generating the 7×7 beamlets and a 7×7 lens array,are manufactured by using a commercial two-photon grayscale 3D laser printer.

关键词： 3D laser printing Direct laser writing Multi-photon absorption Multi-focus optics Diffractive optical element Lens array

NICKEL-BASE ALLOY SHEET ALLOYS USED IN AEROSPACE APPLICATIONS

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 423-432页

作者： J.H. Tundermann(Inco Alloys international,Inc.,Huntington,WV 25705,USA ) Inco Alloys int Huntington United States

Many gas turbine components are made from nickel alloy sheet. Most are used for directing or containing gases at high temperatures and pressures where metal temperatures can be as high as 1090℃ (2000°F). These applications included combustor systems, casings and liners, transition and exhaust ducting, afterburners, and thrust reversere. Light weight components and sub-assemblies call for alloy sheet with high levels of stength and oxidation resistance. Complex component design calls for excellent ductility and ease of *** wide range of nickel alloy sheet alloys presently used in aircraft and land-based gas turbines is briefly described and typical properties presented. New sheet alloy developments, involving INCONEL￣* alloys 625LCF, 718SPF and MA754, are presented including the process routes involved and material properties.

关键词： aerospace sheet products nickel-base alloys,INCONEL alloy 625LCF,INCONEL alloy 718SPF INCONEL alloy MA754,low cycle fatigue,superplastic forming,oxide dispersion strengthened

DEVELOPMENT　OF　INCONEL~　ALLOY　783，A　LOW　THERMAL　EXPANSION，CRACK　GROWTH　RESISTANT　SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 503-507页

作者： J.H.Thndermann(Inco Alloys international, Inc., Huntington, WV 25705, USA ) Inco Alloys int Inc. Huntington United States

Low thermal expansion superalloys have been used for a number of years in a variety of applications, including gas turbine engines. The low thermal expansion characteristics of the most widely used class of materials are derived from the ferromagnetic characteristics of Ni, Fe, and Co-based austenitic matrices containing little or no *** developments have been aimed at improving the oxidation resistance and stress accelerated grain boundary oxygen (SAGBO) *** alloy 783 is an oxidation resistant, low coefficient of thermal expansion superalloy developed for gas turbine applications. Alloy 783 represents a culmination in the development, of an alloy system with very high alumtnum content that, in addition to forming γ′,causes βaluminide phase precipitation in the austenitic *** type of structure can be processed to resist both SAGBO and general oxidation,while providing low thermal expansion and useful mechanical properties up to 700℃.Key aspects of the alloy's development are presented.

关键词： coefficient of thermal expansion oxidation resistance crack growth resistance,SAGBO INCONEL alloy 783,alloy 718,gamma prime phase beta phase

PERIODIC SOLUTIONS FOR HAMILTONIANSYSTEMS IN A NONCONVEX POTENTIAL WELL

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Acta Mathematica Scientia 1992年第2期12卷 171-178页

作者：李树杰 int. Cent. for Theo. Phys. Trieste Italy Scuola int. Superiore di Studi Avanzati Trieste Italy

Recently there has been a considerable amount of work on the existence of Tperiodic solutions for Hamiltonian systems with singular potentials, (see [1]—[7],[10], [11], [13], [14]). In this paper we will study the ex... 详细信息

关键词： PERIODIC SOLUTIONS FOR HAMILTONIANSYSTEMS IN A NONCONVEX POTENTIAL WELL 门刀 Pro

RISK ANALYSIS OF JACKET PLATFORMS DURING INSTALLATION ON SEA

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China Ocean Engineering 1990年第2期5卷 199-207页

作者： Li, Jianchao Hu, Ruihua China Jilin int Engineering Designing Inst Changchun China

In this paper, the uncertainty of environmental loads and soil resistance is analyzed, and the wave and current loads acting on a jacket during the unpiled installation phase are converted to its foundation loads. With a probability model of soil resistance, risk applied to the design of temporary seafloor support of a platform and the risk of failure, or probability of horizontal sliding, tilting and ovrturning can be pridicted. Thereby, optimum design and installation procedure may be chosen according to safety and economical factors. A Fortran program based on the model is developed. The application of the program to a jacket in South China Sea is described.

关键词： Economics Foundations Soil Structure interaction Probability

A chemical oscillating reaction in NaBrO_3-pyruvic acid-H_2SO_4-[Ni(Me_2[14]1,3-diene N_4)]^(2+) system

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Chinese Journal of Chemistry 1997年第2期15卷 97-101页

作者： ZHAO,Liang XU,Zhi-Qiang WU,Chang-Chun XIE,Fu-Xin NI,Shi-ShengDepartment of Chemistry,Anhui University,Hefei,Anhui 2S0039,ChinaLUO,Yiinternational Programs,Anhui University,Hefei,Anhui 230039,China ANHUI UNIV INT PROGRAMSHEFEI 230039ANHUIPEOPLES R CHINA

In this paper we report a chemical oscillation catalyzed by [Ni(Me2[14]1,3-diene N4)]2+ (Me2[14]l,3-diene N4 denotes 2,3-dimethyl-l,4,8,ll-tetraazacyclotetradeca-1,3-diene) in BrO3--pyruvic acid-H2SO4 *** domain of the existence of the oscillation was *** effects of initial concentration of the components on the oscillation were *** features of the oscillations were described in *** also examined the effects of Ag+,Hg2+,CCl4,free radical inhibitors,*** the osillations.

关键词： Chemical oscillation catalysis initial concentration