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Multi-objective energy management in microgrids with hybrid energy sources and battery energy storage systems

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Protection and Control of Modern Power systems 2020年第1期5卷 1-20页

作者： v.v.s.N.Murty Ashwani Kumar Electrical Engg Department NIT KurukshetraKurukshetraHaryanaIndia

Microgrid with hybrid renewable energy sources is a promising solution where the distribution network expansion is unfeasible or not *** of renewable energy sources provides energy security,substantial cost savings and reduction in greenhouse gas emissions,enabling nation to meet emission *** energy management is a challenging task for microgrid operator(MGO)for optimal energy utilization in microgrid with penetration of renewable energy sources,energy storage devices and demand *** this paper,optimal energy dispatch strategy is established for grid connected and standalone microgrids integrated with photovoltaic(Pv),wind turbine(WT),fuel cell(FC),micro turbine(MT),diesel generator(DG)and battery energy storage system(Ess).Techno-economic benefits are demonstrated for the hybrid power *** far,microgrid energy management problem has been addressed with the aim of minimizing operating cost ***,the issues of power losses and environment i.e.,emission-related objectives need to be addressed for effective energy management of microgrid *** this paper,microgrid energy management(MGEM)is formulated as mixedinteger linear programming and a new multi-objective solution is proposed for MGEM along with demand response *** response is included in the optimization problem to demonstrate it’s impact on optimal energy dispatch and techno-commercial *** interface has been developed for optimal scheduling of *** results are obtained for the optimal capacity of Pv,WT,DG,MT,FC,converter,BEs,charging/discharging scheduling,state of charge of battery,power exchange with grid,annual net present cost,cost of energy,initial cost,operational cost,fuel cost and penalty of greenhouse gases *** results show that CO_(2) emissions in standalone hybrid microgrid system is reduced by 51.60%compared to traditional system with grid *** results obtained with the proposed method is comp

关键词： Microgrid energy management Renewable energy sources storage system Demand response

Multifunctional A356 alloy/PKsAnp composites:Microstructure and mechanical properties

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Defence Technology（防务技术） 2020年第3期16卷 731-736页

作者： v.s.Aigbodion I.C.Ezema Department of Metallurgical and Materials Engineering University of NigeriaNsukkaNigeria

Mechanical properties and microstructure of multifunctional composites produced with palm kernel shell ash nano particle(PKsAnp)-A356 alloy composites was *** composites were produced using Double layer feeding stir casting method(DLF-sCM) by adding 1 wt%-4 wt.% *** microstructure,density,electrical and mechanical properties were *** results shows that there was a uniform distribution of the PKsAnp in A356 *** mismatch at the interface between the PKsAnp and A356 alloy was 4.26%.Improvement of 30.47%,41.91%,49.52%,40.90% and 65.09% were obtained for hardness values,tensile,yield strength,%elongation and impact energy at 4 wt% *** work has established that the developed composites can be used for multifunctional applications where combination of toughness and strength is vital.

关键词： PKsAnp A356 alloy Microstructure Electrical and mechanical properties

High-strength Nanostructured Cold-Resistant steels for Continental shelf Development

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Journal of Iron and steel Research International 2011年第S1期18卷 66-71页

作者： Oryshchenko A s Khlusova E I Orlov v v FsUE CRIsM PROMETEY St.PetersburgRussia

The article describes principles of developing steels for maritime structures and main *** scientific approach lies in forming an ultra fine-grained and submicrocrystal structure through thermomechanical treatment of low-carbon low-alloyed steels,providing higher strength and resistance to brittle *** article presents results of assessing the operability characteristics and introducing new steels.

关键词： low-alloyed steels microstructure mechanical properties thermomechanical treatment

structural evolution-enabled BiFeO3 modulated by strontium doping with enhanced dielectric,optical and superparamagnetic properties by a modified sol-gel method

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Chinese Physics B 2023年第3期32卷 521-530页

作者： sharon v s veena Gopalan E Malini K A Department of Physics vimala College Thrissur-9 KeralaIndia

Multiferroic(BFO)nanoparticles doped with strontium with the general formula Bi1-xsrx FeO3(x=0,0.3,0.5,0.7)were synthesized using a modified sol-gel auto-combustion *** structural,electrical,optical,and magnetic properties of the samples are *** structural analysis,carried out using the x-ray powder diffraction technique,shows a structural transition from rhombohedral(R-3c)to cubic(Pm-3m)for the doping amount of strontium(sr)equal to x=*** analysis of the prepared samples were carried out using scanning electron microscopy(sEM).Frequency-dependent dielectric constant and ac conductivity were *** doped samples,with improved dielectric properties,can be used to fabricate different optoelectronic *** dielectric dispersion and broad relaxation were exhibited by all the ***–Cole plots were employed as an effective tool to study the dispersion parameters,namely,the optical dielectric constant,static dielectric constant,relaxation time,and spreading *** activation energy was calculated from the relaxation peaks and Cole–Cole plots,which were found to be compatible with each *** bandgap of the samples was calculated using diffuse reflectance spectral(DRs)*** and strong photoluminescence in the IR region was observed in the samples,similar to ZnO,which was reported for the first ***-temperature and low-temperature magnetization studies point towards the superparamagnetic nature of the samples,with an improvement in magnetic properties with *** antiferromagnetic behavior of bulk bismuth ferrite transforms to superparamagnetic in nature for both pure and sr-substituted bismuth ferrite nanoparticles due to the close dimensions of crystallite size with magnetic domains leading to the break-down of the frustrated spin cycloidal moment.

关键词： multiferroics sol-gel process x-ray spectra optical and dielectric properties

Optical Emission spectroscopic study During the Evaporation of Aluminium in the Thermal Plasma Reactor

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Plasma science and Technology 2010年第1期12卷 27-30页

作者： I.BANERJEE N.v.KULKARNI s.KARMAKER v.L.MATHE s.v.BHORAsKAR A.K.DAs Applied Physics Department Birla Institute of Technology Department of Physics University of Pune Department Bhabha Atomic Research Center

The oxidation of aluminium was studied using optical emission spectroscopy （OEs） during the evaporation of aluminium in traces of oxygen in a thermal plasma reactor. The ratio of the measured line intensities of Al-O with that of Al follows the exact trend as of that obtained from the corresponding line intensities in X-ray diffraction spectra of the synthesized samples. In this paper the inherent capacity of emission spectroscopy in evaluating the growth processes under plasma induced reactions is presented.

关键词： thermal plasma reactor aluminium oxidation optical emission spectroscopy,X-ray diffraction

Effect of hydrogen plasma treatment on the growth and microstructures of multiwalled carbon nanotubes

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Nano-Micro Letters 2010年第1期2卷 42-48页

作者： s.K.srivastava v.D.vankar v.Kumar Department of Physics Indian Institute of Technology Delhi National Physical Laboratory Dr.K.S.Krishnan Marg

The effect of hydrogen plasma treatment of iron oxide films on the growth and microstructure of carbon nanotubes(CNTs)by microwave plasma enhanced chemical vapor deposition process has been *** plasma was characterized in-situ using optical emission *** of the films was examined by scanning electron *** analysis was carried out by high resolution transmission electron microscopy(HRTEM)equipped with energy dispersive X-ray spectroscopy(EDs)and micro-diffraction *** is found that oxide films without H_2 plasma pretreatment or treated for lesser time resulted in CNT films with high percentage of carbonaceous particles and with embedded particles/nanorods distributed discontinuously in the cavity of the *** embedded particles were found to be of iron carbide(Fe-C)as confirmed by HRTEM,EDs and micro-diffraction *** observations suggested that the iron oxide particles had poor catalytic action for CNT growth and in-situ reduction of oxide clusters to Fe by hydrogen plasma plays a key role in discontinuous filling of the nanotubes by the catalytic particles.

关键词： Carbon nanotubes Chemical vapor deposition Iron carbide MPECvD

A photometric study of two neglected eclipsing binaries

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Research in Astronomy and Astrophysics 2021年第7期21卷 192-198页

作者： v.Kudak M.Fedurco v.Perig s.Parimucha Laboratory of space Researches Uzhhorod National UniversityUzhhorodDaleka Str.2A88000Ukraine Institute of Physics Faculty of ScienceUniversity of P.J.SafarikKosicePark Angelinum 904001Slovakia

We present the first BvR photometry,period variation and photometric light curve analysis of two poorly studied eclipsing binaries,v1321 Cyg and CR *** were carried out from November 2017 to January 2020 at the observatory of Uzhhorod National *** variations were studied using all available early published as well as our minima *** used the newly developed ELIs a code for the light curve analysis and determination of photometric parameters for both *** found that v1321 Cyg is a close detached eclipsing system with a low photometric mass ratio of q=0.28 which suggests that the binary is a post-mass transfer *** significant period changes in this system are *** Tau is,on the other hand,a semi-detached system where the secondary component almost fills its Roche *** detected a long-term period increase at a rate of 1.49 × 10^(-7) d yr^(-1),which supports mass transfer from the lower mass secondary component to the more massive primary.

关键词： binaries:close binaries:eclipsing stars:individual(v1321 Cyg CR Tau)

Design of self-healing PEO-based protective layers containing in-situ grown LDH loaded with inhibitor on the MA8 magnesium alloy

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Journal of Magnesium and Alloys 2023年第10期11卷 3688-3709页

作者： A.s.Gnedenkov s.L.sinebryukhov A.D.Nomerovskii v.s.Filonina A.Yu.Ustinov s.v.Gnedenkov Institute of Chemistry of FEB RAs 159 Pr.100-letiya VladivostokaVladivostok690022Russia

The high corrosion rate of magnesium and its alloys in chloride-containing solution significantly reduces the potential of this material for diverse ***,the formation of a smart protective coating was achieved in this work to prevent degradation of the MA8 magnesium alloy.A porous ceramic-like matrix was obtained on the material by plasma electrolytic oxidation(PEO).Further surface functionalization was performed using layered double hydroxides(LDH) served as nanocontainers for the corrosion *** methods of LDH intercalation with benzotriazole(BTA) were *** composition and morphology of the formed coating were studied using sEM-EDX analysis,XRD,XPs,and Raman *** corrosion behavior of the coated samples was evaluated using electrochemical impedance spectroscopy and potentiodynamic *** corrosion rate was estimated using volumetry and gravimetry *** formed composite coating provides the Mg alloy with the lowest corrosion activity(|Z|_(f)=0.1 Hz)=8.48·10^(5) Ω·cm^(2),I_(c)=1.4·10^(-8)A/cm^(2),P_(H)=0.21 mm/year) and improves the protective properties of the PEO-coated sample(|Z|_(f)=0.1 Hz)=8.37·10^(3) Ω·cm^(2),I_(c)=4.1·10^(-7)A/cm^(2),P_(H)=0.31 mm/year).The realization of the self-healing effect of the inhibitor-containing LDH/PEO-coated system was studied using localized electrochemical methods(svET and sIET) with two artificial defects on the surface.A mechanism involving three stages for the active corrosion protection of the alloy was *** findings contribute to the follow-up work of developing modified LDH/PEO-based structures that promote the Mg alloy with high corrosion resistance,superior electrochemical performance for applications in various fields of industry and medicine.

关键词： Magnesium alloy Plasma electrolytic oxidation Layered double hydroxides Corrosion inhibitor Electrochemistry Corrosion rate

Antibacterial HA-coatings on bioresorbable Mg alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1965-1985页

作者： K.v.Nadaraia D.v.Mashtalyar M.A.Piatkova A.I.Pleshkova I.M.Imshinetskiy M.s.Gerasimenko E.A.Belov v.v.Kumeiko D.N.Kozyrev K.A.Fomenko v.v.Mostovaya B.R.Torpanov A.R.Biktimirov I.s.Osmushko s.L.sinebryukhov s.v.Gnedenkov Institute of Chemistry FEB RAs 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal University 10 Ajax BayRussky IslandVladivostok 690922Russia A.v.Zhirmunsky National scientific Center of Marine Biology FEB RAs 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical Dermatovenerological Dispensary 18 V St.GamarnikaVladivostok 690033Russia NMIC“Treatment and Rehabilitation Center” 3 Ivankovskoe highwayMoscow 125367Russia

In this study,a calcium-phosphate coating was formed on a Mg-Mn-Ce alloy by the plasma electrolytic oxidation(PEO).The antibiotic vancomycin,widely used in the treatment of infections caused by staphylococcus aureus(***),was impregnated into the *** with vancomycin showed high bactericidal activity against *** mechanical and electrochemical properties of the formed coatings were studied,as well as in vitro cytotoxicity tests and in vivo tests on mature male rats were *** to sEM,EDs,XRD and XPs data,coatings had a developed morphology and contained hydroxyapatite,which indicates high *** analysis of roughness of coatings without and with vancomycin did not reveal any differences,confirming the high roughness of the *** electrochemical tests,an increase in corrosion resistance by more than two times after the application of PEO coatings was *** to the results of an in vivo study,after 28 days of the implantation of samples with calcium phosphate PEO coating and vancomycin,no signs of inflammation were observed,while an inflammatory reaction developed in the area of implantation of bare alloy,followed by *** release tests from the coatings show a sharp decrease in the concentration of the released antibiotic on day 7 and then a gradual decrease until day *** the experiment,no significant deviations in the condition and behavior of the animals were observed;clinical tests did not reveal a systemic toxic reaction.

关键词： Bioactive coatings Biocompatibility Mg alloy Plasma electrolytic oxidation Hydroxyapatite vancomycin