Дисертації з теми "Battery optimisation"
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Hunter, Phillip M. "VRLA battery float charge : analysis and optimisation." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2003. http://hdl.handle.net/10092/5594.
Повний текст джерелаYee, Timothy. "Remote Area Power System (RAPS) Battery Lifecycle Cost Optimisation." Thesis, University of Canterbury. Engineering Management, 2014. http://hdl.handle.net/10092/8952.
Повний текст джерелаGreen, Susan. "The optimisation of lithium sulphuryl chloride cells." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/27797.
Повний текст джерелаKhanaki, Razieh. "Integration of non-isolated converters in battery storage systems: Topology development, evaluation and optimisation." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208259/1/Razieh_Khanaki_Thesis.pdf.
Повний текст джерелаMariani, Alessandro. "Optimisation of valve regulated lead acid battery design for high power applications." Thesis, University of South Wales, 2017. https://pure.southwales.ac.uk/en/studentthesis/optimisation-of-valve-regulated-lead-acid-battery-design-for-high-power-applications(f8316110-ebc1-4f0b-9e1b-4a66d7e50564).html.
Повний текст джерелаEl, Hage Ranine. "Etude et optimisation d'une batterie à circulation tout vanadium." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30101.
Повний текст джерелаThis research focuses on the redox flow batteries (RFBs) conception and optimization. RFBs are devices performing the electrochemical conversion of electric energy to chemical energy (to store); the reverse process allows recovering the stored energy in the form of electricity according to demand. RFBs are well adapted to energy storage from intermittent renewable energy sources. The battery studied is the all-vanadium RFB (VRFB) which was introduced in the 1980's. Owing to the nature of the electrolytes used in the VRFB, the effect of the irreversible cross-contamination, usually encountered in other RFBs such as the Fe-Cr system, is thus overcome. However, the energy density of this system remains lower than 40 Wh.kg-1 (compared to ~ 150 Wh.kg-1 for Li-ion stationary batteries) because of the low solubility (< 2 mol.L-1) of the vanadium salts in sulfuric acid, used as supporting electrolyte. An objective of this thesis is to optimize the formulation of the electrolytes in order to increase the stored energy density. This consists of: i) preparing, analyzing and characterizing the electrolytes (posolyte V(IV)/V(V) and negolyte V(II)/V(III) ), thus expecting to find their optimal composition and ii) understanding the physico-chemical phenomena occurring during the charge-discharge cycling and thus determining the laws governing these processes to overcome any eventual limitation. These aspects were studied using a classical three electrodes cell, enabling to operate with one electrochemical system at a time (the half of the battery). The presence of particles seems to negatively affect the current of the battery even if it enables to increase the stored energy density. On the another hand, the presence of carbon nanoparticles in the posolyte appears to have a beneficial effect on the current due to the increase of the electrode surface area by the formation of aggregates (electronic percolation in the suspension). This part also includes various physical measurements, such as conductivity, density, viscosity and flow rate, as well as powder characterization techniques (SEM, laser diffraction). Another objective is to conceive and elaborate a VRFB (at the laboratory scale) providing an energy density higher than 100 Wh.kg-1, and optimizing as much as possible the power density of the reactor. Mass and charge balances are performed for charge/discharge cycles, to establish correlations that link the response of the system (current, voltage, energy and reversibility) to the (influencing) operating parameters. Conversions, faradic and energy yields were evaluated and optimized
Abdelhedi, Riadh. "Optimisation d’un système de stockage hybride de l’énergie électrique avec batterie et supercondensateurs pour véhicule électrique." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1347/document.
Повний текст джерелаThis work contributes to the optimization of a hybrid storage system that combines lithium-ion batteries with supercapacitors used for electric vehicles. This hybridization structure was chosen due to the complementarity between both used storage devices. Our study focuses on the implementation of advanced energy control and management techniques. Using better the storage system represents the goal of this thesis. Our approach is to develop a real time algorithm of energy management taking into account battery electrical and thermal behaviors. A comparative study evaluates the benefits and the drawbacks of each proposed strategy in order to offer various choices between low cost power sharing solutions and control strategy with high performances. An experimental bench was implemented to apply the theoretical concept
Khawaja, Danial. "Modeling and optimisation of a rotary kiln reactor for the processing of battery materials." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302460.
Повний текст джерелаRotary kilns are cylindrical vessels used to raise materials temperature in a continuous process known as calcination. Rotary kilns find application in various processes such as reduction of oxide ore and hazardous waste reclamation. The advantage of the rotary kiln lies in its ability to handle feedstock ranging from slurries to granular materials with a variety of particle size, thereby maintaining distinct environments such as a bed of solid particles coexisting with an oxidising freeboard. Six different bed behaviours within the kiln have been documented with respect to the filling degree and Froude number. The aim of this study was to develop a two-dimensional suspension model with CFD by using the commercial software COMSOL 5.5 to simulate the two phases, gas and solid, as a mixed phase, following the works of Philips et. al., Physics of Fluids A: Fluid Dynamics 4.1 (1992) 30-40 and Acrivos & Zhang., International Journal Multiphase Flow 20.3 (1994) 579-591. This model was investigated by comparing it against the documented flow regimes as well as through parameters such as particle size, particle density and viscosity of gas in the flow regime known as rolling mode. In addition, the temperature profile of the rotary kiln was investigated by exploring how the mixture variation of the solid bed within the rotary kiln affects the heat transfer when heat is supplied from the wall during a rolling mode. The results of the two-dimensional suspension model showed that it was only possible to simulate the slipping mode accurately; others mode could not be described as documented in literature. It is indicated that the angle of repose and viscous forces within the rotary kiln were low resulting in the suspension model not being able to accurately depict the remaining flow regimes as documented. For instance, the rolling mode was depicted more as a cataracting mode due to the free fall of particles after elevation of the bed. The particle size and the particle density were found to have a significant impact on the suspension model as the viscous forces became low for a particle size and particle density below 0.4 mm and 1500 kg/m3 respectively. As for the viscosity of gas it was found that the closer it got to the value 2.055e-3 (Pa*s) the sedimentation flux became too large resulting in the bed particles being pulled down and remaining there. Thus, the suspension model could simulate a solid and liquid phase and not a gas phase as intended. Lastly, the temperature analysis revealed that the impact of the thermal conductivity was more significant than the specific heat capacity in the range of 1 - 50 (W/(m*K)) and 300 - 800 (J/(kg*K)) respectively, due to the time it took to reach a homogeneous temperature profile.
Rodrigues, Daniel Lionel. "Battery energy storage design optimisation sizing within a peer-to-peer energy sharing community." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/73324.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2019.
Electrical, Electronic and Computer Engineering
MEng
Unrestricted
Perin, Igor. "Techno-economical optimisation of 50kV AC railway networks." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/204187/1/Igor_Perin_Thesis.pdf.
Повний текст джерелаArbeltier, Steven. "Optimisation de dépôts de LIPON par pulvérisation magnétron RadioFréquence pour la fabrication de micro-batteries. Modélisation de l'interaction plasma-surface." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS170/document.
Повний текст джерелаThe scale reduction of batteries is a real technological challenge for the near future. These micro-batteries, about ten micrometers thick, are used to supply the power for small sized systems. LIPON is one of the most suitable electrolytes considered for industrial scale production. It is deposited in thin-film by radiofrequency magnetron sputtering of Li₃PO₄ in nitrogen plasma. This thesis is focused on particles behavior in plasma and during deposition. Optical emission spectroscopy and electron density measurements have been performed, to provide data used as input or validation for several numerical models. The first model describes plasma kinetics in the magnetron reactor, as 0D global model, and helps to identify the main chemical species and important reactions. This information has been useful to define a simplified kinetics for the second model, 2D, dealing with the charged species behavior in the plasma and describing target sputtering by ion bombardment. It provides the sputtered areas, ion energy and impinging angle onto the target. These obtained results have been employed in a 3D model that simulates sputtered atoms transport from the target to the substrate and predicting the thin-film features. Some characteristics of the target during sputtering have been highlighted and confirmed by the direct comparison between numerical and experimental results
Marino, Cyril. "Optimisation de nouvelles électrodes négatives énergétiques pour batteries lithium-ion : caractérisation des interfaces électrode/électrolyte." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20175/document.
Повний текст джерелаThe thesis is devoted to the study of two negative electrode materials for Li-ion batteries: NiSb2 and TiSnSb. These conversion type materials have high capacities greater than graphite electrode used in current devices. However, these compounds suffer from i) a low cyclability caused by volumetric variations which are characteristic of this type of electrode, and ii) a loss of lithium (irreversible process) during the 1st insertion due to the reduction of the liquid electrolyte on the surface of active material.The mechanisms have been studied by X-Ray Diffraction, Mössbauer Spectroscopy (119Sn and 121Sb). The in situ and ex situ X-ray Absorption Spectroscopy analysis have allowed identifying both the formation of highly reactive Ti and Ni nanoparticles and a relaxation effect in the discharged electrode at 0V. The improvement of performances is based on the composite electrodes formulation using carbon fibers as conductive additive and Carboxymethyl cellulose CMC as binder. A cyclability of 250 cycles at C and 4C rate is reached for TiSnSb electrodes. The addition of Fluoro Ethylene Carbonate (FEC) in the electrolyte is another way to increase the life span of electrodes.The electrode/electrolyte interface has been analyzed by Nuclear Magnetic Resonance, X-ray Photoelectron Spectroscopy and Infrared Spectroscopy. During the discharge, among the species produced from the reduction of electrolyte Li2CO3 is in the majority because new surfaces are created (volumetric expansion). On charge, a fragmentation of the Solid Electrolyte Interphase (SEI) deposited on the surface of the active material grains is observed. Moreover, first XPS investigations have shown that the SEI thickness continuously increases on cycling
Carter, Rebecca C. "An assessment of different optimisation schemes for hybridising a battery electric vehicle with a supercapacitor pack." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14358.
Повний текст джерелаSarban, Singh Ranjit Singh. "A design scheme of energy management, control, optimisation system for hybrid solar-wind and battery energy storages system." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/13788.
Повний текст джерелаAbdilla, Analiza. "Optimisation of small multi-rotor unmanned aerial vehicle capabilities through battery sub-division and the deployment of communication nodes." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715816.
Повний текст джерелаTrippe, Annette Erika [Verfasser], Thomas [Akademischer Betreuer] Hamacher, Andreas [Gutachter] Jossen, Hoay Beng [Gutachter] Gooi, and Thomas [Gutachter] Hamacher. "Optimisation Model of Intelligent Charging Strategies for Battery Electric Vehicles Considering the Power System and Battery Ageing / Annette Erika Trippe ; Gutachter: Andreas Jossen, Hoay Beng Gooi, Thomas Hamacher ; Betreuer: Thomas Hamacher." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1153122235/34.
Повний текст джерелаCharbonnier, Véronique. "Optimisation de la composition en terres rares pour des hydrures métalliques utilisés comme électrodes dans les accumulateurs Ni-MH." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1147.
Повний текст джерелаNi-MH batteries are used in both stationary (solar panels) and mobile (hybrid vehicles) applications. The active material of negative electrodes currently on the market is an AB5-type alloy (A = rare earth, B = transition metal). The continuously increasing demand for energy requires improving the mass capacity of these batteries. For this reason, we study new type of electrode materials ABy (y Æ 3.5 or 3.8). The particular stacking structure of these alloys composed of [AB5] and [A2B4] units give them more capacity. Indeed, [A2B4] unit is able to absorb more hydrogen than [AB5] unit. However, stability in cycling is lowered. In this phD work we have, at first, conducted a study of binary compounds type ANi 3.5 and ANi3.8 (A = Gd, Sm ou Y), then we studied the evolution of the thermodynamic properties, electrochemical and corrosion after successive substitutions of the rare earth (or yttrium) with magnesium and lanthanum
Neiström, Linda. "Characterisation of Used Lead-Acid Batteries for Feed Optimisation in Secondary Lead Production." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70740.
Повний текст джерелаBasma, Hussein. "Energy management strategies for battery electric bus fleet." Thesis, Université Paris sciences et lettres, 2020. http://thesesprivees.mines-paristech.fr/2020/2020UPSLM036_archivage.pdf.
Повний текст джерелаInitiatives to decrease emissions from the transport sector are increasing worldwide by seeking alternative technologies to replace oil-based mobility. Battery Electric Buses (BEB) present a promising solution thanks to their high energy efficiency, low greenhouse gas emissions and the absence of local pollutant emissions. However, this technology still faces many challenges, especially its high total cost of ownership (TCO) and other operational factors such as the limited bus driving range, the high energy refueling time, and the required charging technologies and strategies. In this context, this thesis presents a systematic methodology that aims at developing solutions to help overcoming these challenges by providing optimal battery sizing and charging strategy for BEB. First, a comprehensive multi-physical bus energy model is developed to evaluate its energy needs considering all the energy systems encountered within. The energy consumption of the bus is then evaluated at a variety of operating conditions. Then, a techno-economic model of an entire bus line is developed in order to assess the impact of different battery sizing and charging strategies on the costs and operation of BEB. A TCO model is introduced considering the BEB unit costs, battery purchase and replacement costs, energy and power costs, infrastructure, and maintenance costs. A case study in Paris city is presented and the analysis reveals the resulting tradeoff between the TCO and BEB schedule disruptions and delays as function of different battery sizes and charging strategies. A methodology to minimize the TCO of BEB deployment is presented providing the optimal battery sizing and charging strategy for BEB, while respecting the BEB operation constraints. The methodology is a 2-step optimization algorithm that utilizes both Dynamic programming and Genetic Algorithm optimization routines. The results show that the proposed methodology could reduce the BEB TCO between 15-25% compared to the currently adopted approaches to deploy BEB
Zhao, Jianning. "Co-Optimisation du Dimensionnement et du Contrôle des Groupe Motopropulseurs Innovants." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC057/document.
Повний текст джерелаAdvanced technologies are highly demanded in automotive industry to meet the more and more stringent regulations of fuel consumption. Cooptimization of design and control for vehicle propulsion systems with an enhanced computational efficiency is investigated in this thesis.Powertrain components, such as internal combustion engines, batteries, and electric motor/generators, are analytically modeled at descriptive and predictive level correspondingly for the development of fastrunning control optimization and for the scalability of design optimization. The minimal fuel consumption of a hybrid-electric vehicle is evaluated through novel optimization methods. These methods – including the Selective Hamiltonian Minimization, and the GRaphical-Analysis-Based energy Consumption Optimization – are able to evaluate the minimal energy consumption with the enhanced computational efficiency. In addition, the Fully-Analytic energy Consumption Evaluation method approximates the minimal energy consumption in closed form as a function of the mission characteristics and the design parameters of powertrain components.A few case studies are presented in details via the bi-level and uni-level co-optimization approaches, showing an effective improvement in the computational efficiency for the overall co-optimization process
N'Goran, Arnold. "Contrôle optimal et gestion énergétique d'une station d'énergie autonome par optimisation robuste." Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLM050.
Повний текст джерелаPower microgrid control involves solving a complex optimisation problem when it must deal with the intermittent, poorly forecasted production of renewable energy sources and with the short-term dynamics of the storage devices used to address intermittency issue. This thesis aims to shed light on the compared practical performance of optimization methods in control with the implementation of different strategies, exact or approximated, analytical or numerical, deterministic, stochastic or robust
Houbbadi, Adnane. "Optimisation multicritère de la gestion de la recharge d'une flotte de bus électriques." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE1014.
Повний текст джерелаElectro-mobility is increasing significantly in the urban public transport and continues to face important challenges. Electric bus fleets require high performance and extended longevity of lithium-ion battery in highly variable temperature and operating conditions. On the other hand, bus operators are more and more concerned in reducing operation and maintenance cost, which is sensitive to battery aging cost and represents a significant economic parameter for the deployment of electric bus fleets. This thesis presents a methodological approach for optimizing the overnight charging of an electric bus fleet to the depot. This approach is based on both charging scheduling and power modulation in order to minimize a given criterion or several criteria at the same time (e.g. the charging cost, the effective power, battery aging ...). This approach uses an exact optimization methods or Metaheuristics methods according to the type of optimization (mono-objective or multi- objective) and according to the criterion while taking into account the constraints related to bus operating conditions, charging infrastructure and the power grid. This approach has been developed to take into account several battery’s technologies as well as different types of recharging. An electro-thermal and aging model of lithium-ion batteries was developed based on existing models, literature as well as experimental tests. This allowed us to take into account the dynamics of the battery and predict the evolution of its performance when it is subject to variable conditions of use. To illustrate this methodology, a case study was presented in the last chapter and allows a smart managing of large-scale fleet of electric buses that try to maximize in particular the battery lifetime
Duverger, Emilien. "Réseau électrique intelligent pour les nouveaux usages." Thesis, Perpignan, 2019. http://www.theses.fr/2019PERP0027/document.
Повний текст джерелаWith the transformation of the energy landscape due to the development of renewable energies, electric vehicles and storage systems, the current grid needs to be modernized. Microgrid concept is a promising solution based on information and communication technologies to improve the management and efficiency of electricity generation, transmission, distribution and consumption. However, the technical and economic challenges associated with their deployment are numerous. The thesis aims to provide contributions on several key points: production and consumption forecasting, equipment modeling, and microgrid management optimization.Rivesaltes-grid is a microgrid demonstrator on the scale of an industrial building consisting of 60 kWp photovoltaic array, 85 kWh lithium-ion batteries and an electric vehicle. It has enabled the development of an innovative energy management system (EMS) to optimize the microgrids energy efficiency. This EMS, based on predictive control management and the resolution of a constrained optimization problem, reduces operation cost by 6.2%. This microgrid management requires as input: (1) the production prediction based on a random forest algorithm and a modeling of the PV field by 1-diode model, (2) the consumption prediction from partitioning algorithm k-means++ and (3) dynamic modeling of the storage system with its constraints
Marx, Neigel. "Gestion énergétique et dimensionnement des systèmes hybrides multi-pile à combustible et batterie pour application au transport automobile." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD053/document.
Повний текст джерелаThe electrification of the transportation industry is on the rise. This rise drives the development of new technologies. Although the fuel cell is not a recently developed technology, it benefits from it. However, it is still too expensive and not durable enough compared to the market's expectations. Scientific research has been focused primarily on their management and its ancillaries. Nevertheless, the interest in multistack fuel cell systems has been rising in the community.The energy management and the sizing of multistack system hybrized with a battery is the focus of this thesis. First, the performances of such systems is compared to that of single stack systems. To that end, a study based on the determination of the optimal management strategy depending on the sizing has been completed. The main tool used in this study was optimization through dynamic programming. Results show a significant increase in performance in favor of multistack systems. Then, an online energy management strategy is designed based on Bayesian decision theory. Its goal is to optimize consumption and lifetime by using driver behavior knowledge. This approach has been compared to other energy management strategies and enables performances gains in consumption and lifetime for the multistack system
Benmouna, Amel. "Gestion énergétique reconfigurable d'un véhicule électrique basée sur l'identification en ligne des sources embarquées." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCA020.
Повний текст джерелаThis thesis deals with the study of the reconfigurable energy management of an electric vehicle based on the online identification of embedded sources. In recent years, the energy management of a hybrid system for automotive applications has been the subject of a great number of research. In this study, the energy chain considered consists of a fuel cell as the main source, storage sources such as batteries and/or supercapacitors, converters for each source and finally a load emulating the power demand. Indeed, the problem in hybrid systems is to find a strategy for a better distribution of electrical power between the different embedded sources, which is the added value of this research work. As well as defining energy management laws by considering real-time measurements in order to increase the lifespan and reliability of sources on the one hand, and the availability of the electric vehicle on the other hand. In this thesis, the nonlinear control called IDA-PBC (Interconnection and Damping assignment-Passivity Based Control) is used with the PCH (Port Controlled Hamiltonian) structure which allows to present structural properties of the system namely total system energy, damping and state interconnections. The IDA-PBC method is a powerful nonlinear technique, it is considered as a general means to stabilize a large class of physical systems. In a second part of this work, an optimal energy management strategy is proposed for the hybrid system under study, which is the combination of IDA-PBC and Hamiltonian's Jacobi Bellman method. Proof of stability is provided and the effectiveness of the proposed strategy is demonstrated. Several experimental validations are presented
Paireau, Cyril. "Optimisation de la cyclabilité de composites Si/C pour électrodes négatives d'accumulateurs Li-ion." Phd thesis, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00802436.
Повний текст джерелаLahmani, Fatine. "Conception et optimisation de circuits électroniques communicants pour une intégration au format carte bancaire : application à une serrure de vélo à assistance électrique." Phd thesis, Université de Cergy Pontoise, 2014. http://tel.archives-ouvertes.fr/tel-01023711.
Повний текст джерелаArcaya, Jordan Alexis. "Optimisation de la consommation énergétique sous contrainte de QoS pour des lunettes connectées intelligentes." Thesis, Université Côte d'Azur, 2021. http://www.theses.fr/2021COAZ4027.
Повний текст джерелаA growing number of physical objects are being connected to the Internet at an unprecedented rate realizing the idea of the Internet of Things (IoT). Wearables are a class of IoT devices worn on the body that can detect and process physiological signals. A wearable can then give bio-feedback to the wearer or send information to the cloud for further analysis. In this context, the Ellcie-Healthy start-up is developing an intelligent and connected eyewear solution with the aim at improving the user’s quality of life and to prevent risks for their health and safety. To do so, several sensors are integrated into the wearable eyeglass to collect and send physical, physiological and environmental information towards a gateway, typically a smartphone. Designing wearable devices deals with numerous challenges such as the energy consumption, the quality of service (QoS) and the scalability, to cite only a few. Several design constraints, such as the autonomy and QoS, must be addressed early in the design flow to ensure the wearable device will meet the user requirements. In this PhD thesis, we propose a simulation flow based on a system-level modeling approach to help designers making the best choices of hardware/software settings early in the design phase. To do so, we have first developed analytical power models for the Ellcie Healthy smart glasses. These models, built from data measured on the real platform, allow estimating the average power consumption of the system, and so the battery lifetime, for different application scenarios. Then, performance constraints have also been considered in our system-level approach. The drowsiness detection application, developed at Ellcie Healthy, has been profiled to identify the hardware and software configurations impacting the most the energy consumption and the application QoS, i.e. the detection performance. A solution based on a Convolutional Neural Network (CNN) has been proposed to further improve the drowsiness detection QoS. We have also demonstrated that it is possible to execute this CNN at the edge (i.e. on a micro-controller). A battery testbench has also been developed to evaluate battery safety conditions as well as the aging phenomenon. Using this experimental platform, a significant amount of information on the battery charge/discharge process has been collected. A data-driven battery model has been proposed and validated. All these models have been integrated into a simulation framework which allows modeling and simulating existing or future versions of the smart connected glasses. Using this framework, designers can rapidly investigate trade-offs between hardware and/or software settings, as well as study system autonomy and application QoS. In addition, this simulation flow can be used to evaluate power management strategies from a high-level point of view
Tonnelier, Gilles. "Contribution à la conception et à l'optimisation multi-physique de batterie mécaniques pour les applications mobiles." Thesis, Besançon, 2011. http://www.theses.fr/2011BESA2048.
Повний текст джерелаTo improve its tram offer, ALSTOM Transport has decided to develop a mechanical batterythat provides energy of a vehicle between two stations. But even if the flywheels are essentiallydevelopped since the 1950s for mobile applications, none of them is designed to ensure 100%of energy for mobile applications. The battery must be light, weigh as little as possible, besafe and respect the specifications.Following a bibliographic data analysis, we undertook to develop a method of pre-sizingmechanical battery by taking into account interactions between different major organs, whereaspreviously, methods were concentrated on developing mechanical batteries part by part.For this, we developed an integrated design tool that takes into account the energy (energyand power), mechanic (strength of materials, rotor dynamics), electromagnetic (electric motor)and geometric (template integration, creation of volumes). We also develop a method forselecting the right materials for flywheels, from which we have compiled a list of relevantmaterials.We have shown that the integrated design is more efficient in terms of integration andbalance between the mechanical and electromagnetic.We also showed that composite materialsare not necessarily the best design choices and materials such as high performance steels areexcellent candidates according to the study area of interest (the threshold being the criticalrotational speed 30000 rpm). We have shown that it is possible to achieve stable areas ofoperation, although it will probably be inevitable to pass critical speeds at startup. The designmethod we developed ensures that the only modes excited are the dynamic modes of bearings,which can be treaten quite easily. It can also represent the system configuration, make a staticstress analysis, study the dynamic phenomena of a mechanical battery, and finally, this methodallows an overall system optimization by the Kohonen method.The results are significant because the systematic method we developed can be applied toevery cases. It helps to know what materials to choose, the configuration you want, presentsgraphically the results of behavioral systems studied and brings a knowledge of the systemunder development. This allows us to anticipate potential changes in design. It is therefore atool for understanding and making during the design process.The scientific path that we have taken is the one advocated by Professor Giancarlo Genta,Italian specialist in the field, at the end of his own studies. This evolutionary approach hasled to increased knowledge of batteries and better mechanical design.Keywords
Djemal, Fathi. "Analyse et optimisation des batteurs dynamiques non linéaires." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0007/document.
Повний текст джерелаVibrations are usually undesired phenomena as they may cause discomfort, disturbance, damage, and sometimes destruction of machines and structures. It must be reduced or controlled or eliminated. For this reason, the vibrations attenuation became a major issue for scientists and researchers in order to develop effective solutions for these problems. Many technologies have been developed. Among these technologies, the nonlinear vibration absorbers have significant performance in the vibration attenuation over a wide frequency band. In this context, this thesis focuses on the analysis and optimization of nonlinear vibration absorbers. The objective of the thesis is to analyze the nonlinear dynamic behavior of systems with nonlinear vibration absorbers. For this, a dynamic model of a two degrees of freedom system is developed. The Asymptotic Numerical Method (ANM) is used to solve the nonlinear equations of motion. The performance of this method is shown via a comparison with the Newton-Raphson method. The nonlinear modal analysis system with cubic nonlinearity is made by an explicit formulation of the nonlinear Frequency Response Functions (FRFs) and Nonlinear Normal Modes (MNNs). An experimental study is performed to validate the numerical results
Kerzreho, Corentin. "Caractérisation et optimisation d'une batterie électromécanique sous chargement cyclique." Cachan, Ecole normale supérieure, 2002. http://www.theses.fr/2002DENS0002.
Повний текст джерелаYouard, Timothy John. "Feasibility of an Electric Jetpack." Thesis, University of Canterbury. Electrical and Computer Engineering, 2010. http://hdl.handle.net/10092/5293.
Повний текст джерелаBendjedia, Bachir. "Gestion et optimisation d’énergie électrique avec tolérance aux défauts d’un système hybride PàC/ batterie." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS229.
Повний текст джерелаThe work of this thesis is part of a theme that concerns the optimal sizing and energy management resilient to the faults of a multi-source system (hybrid) for the power supply of an electric vehicle. In our case, the storage system consists of a fuel cell as the main source and a secondary source based on a Li-ion battery. The study carried out on the sizing shows the interest of the hybridization compared to a mono-source single battery or fuel cell only system. The interest of this hybridization in terms of weight, volume and cost becomes more and more important by increasing the autonomy of the vehicle. After scaling the hybrid source for a 700 km drive range, we investigated the influence of battery technology and management methods on the performance of the source (volume, mass, cost, electrical stress applied to the components and the hydrogen consumption of the Fuel Cell / Battery system).The sizing part is followed by the development of an original energy management strategy based on the state of charge of the battery (SOC) to adapt the operating limits of the fuel cell. The results obtained with this method are compared with two other online energy management strategies namely, the frequency division method and the use of a fuzzy supervisor. The strategy developed gave good experimental results in terms of constraints seen by cells and hydrogen consumption. Despite a good sizing of the on-board source and a good optimization of the energy management method, the system is not immune from the fault and can be the seat of several faults that can appear at voltage sensors. and current. In order to ensure the service continuity of the hybrid system in the presence of these faults, a fault-tolerant control strategy has been developed in order to guarantee the stability of the hybrid Fuel Cell/ Battery system and to ensure acceptable performance in degraded mode
Abada, Sofiane. "Étude et optimisation d'un générateur photovoltaïque pour la recharge d'une batterie avec un convertisseur Sepic." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28486/28486.pdf.
Повний текст джерелаChartrel, Thibaut. "Optimisation de liants polymères pour électrodes négatives à base de silicium d'accumulateurs Li-ion." Thesis, Amiens, 2019. http://www.theses.fr/2019AMIE0005.
Повний текст джерелаBall milling impact into polymeric binder for Li-ion silicon-based negative electrode slurry was for the first time investigated. The poly(acrylic acid) degradation characterization is carried out and a solution is proposed in the form of new milling-free formulation development. [(Si+C)SPEX+B]MAG formulation then allows a capacity retention increase from 65 to 84 % at the 20th cycle for silicon rich electrode thanks to the polymeric binder ball milling deleterious absence. A polymer, poly(fumaric acid), is synthetized and used for the first time as silicon-based negative electrode binder. Its modest performance is improved by increasing its average molecular mass and the formulation developed during this work. Altough the electrochemical results of the electrodes based on this polymer are lower than those using PAA but optimizations are possible to improve its performance as a binder. Finally, the transposition of these works was carried out on two other negative electrode materials for Li-ion batteries: TiSnSb and silicon-graphite composite. As described in the literature, the silicon-based electrodes improvements are not strictly transposable to TiSnSb and the electrodes based on this material do not benefit from a significant improvement in their lifetime thanks to the formulation developed. The study of various weight ratios of Si:Gr shows that the silicon content should not be higher than 30 % in mass in the active material to allow interesting capacity retentions
Russo, Patrice. "Contribution à l'amélioration de la gestion de l'énergie dans les applications audio embarquées." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00918487.
Повний текст джерелаReisberg, Steeve. "Biocapteur electrochimique à ADN à base de polymère conducteur : optimisation et étude du mécanisme de transduction." Paris 7, 2006. http://www.theses.fr/2006PA077220.
Повний текст джерелаThis work deals with the design and optimisation of a DNA biosensor based on a multi-functional conducting polymer: the pol(5-hydroxy-1,4-naphtoquinone-co-3-thioacetic acid-1,4-naphtoquinone) or poly(Jug-co-Juga). This "easy-to-make" and "intelligent" device allows the direct electrochemical detection of hybridization via the square wave voltammetry (SWV) technique. It is different from the devices presented in the literature due to its original « signal-on » operating mode, i. E. An electrical signal increase following hybridization. It exhibits very good performance: its high selectivity allows the detection of one target strand among a complex mix of non-specific strands (discrimination), or the detection of only two or even one single base mismatches. Its sensitivity (25 nmol) is comparable to the best results achieved with direct electrochemical detection. An original model has been developed to explain the sensor's transduction mechanism. It has shown that with hybridization, the oligonuclotides (ODN) conformational change leads to a surface "un-blocking" and therefore a signal increase. Finally this architecture has been extended to the use of a new nucleic probe, the PNA
Feybesse, Adeline. "Développement et optimisation par simulation de transistors MOS verticaux de puissance adaptés au secteur automobile (batterie 42V)." Toulouse 3, 2003. http://www.theses.fr/2003TOU30252.
Повний текст джерелаZia, Muhammad Fahad. "On energy management optimization for microgrids enriched with renewable energy sources Microgrids energy management systems: a critical review on methods, solutions, and prospects, in Applied Energy 222, July 2018 Optimal operational planning of scalable DC microgrid with demand response, islanding, and battery degradation cost considerations, in Applied Energy 237, March 2019 Energy management system for an islanded microgrid with convex relaxation, in IEEE Transactions on Industry Applications 55, Nov.-Dec. 2019 Microgrid transactive energy: review, architectures, distributed ledger technologies, and market analysis, in IEEE Access, January 2020." Thesis, Brest, 2020. http://theses-scd.univ-brest.fr/2020/These-2020-SPI-Genie_electrique-ZIA_Muhammad_Fahad.pdf.
Повний текст джерелаThe current electric power system isfacing the challenges of environmental protection,increasing global electricity demand, high reliability requirement, cleanliness of energy, and planning restrictions. To evolve towards green and smart electric power system, centralized generating facilities are now being transformed into smaller and more distributed generations. As a consequence, the concept of microgrid emerges, where a microgrid can operate as a single controllable system and can be assumed as a cluster of loads and distributed energy resources, which may include many renewable energy sources and energy storage systems. The energy management of large numbers of distributed energy resources is needed for reliable operation of microgrid system. Therefore, energy management is the fundamental part of the microgrid operation for economical and sustainable development. In this regard, this thesis focuses on proposing energy management optimization models for optimal operation of microgrid system that include proposed practical Li-ion battery degradation cost model. These different energy management models include objective functions of operating cost of distributed generators, emission cost of conventional generation source, maximum utilization of renewable energy sources, battery degradation cost, demand response incentives, and load shedding penalization cost, with microgrid component and physical network constraints. A comprehensive conceptual seven layer model is also developed to provide standardized insights in implementing real transactive energy systems
Duffiet, Marie. "Compréhension des mécanismes structuraux limitant les performances de LiCoO2 à haut potentiel dans des batteries Li-ion et optimisations des matériaux par dopage Al." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0083.
Повний текст джерелаLithium cobalt oxide (LCO) is widely used as positive electrode material for Li-ion batteries. In order to achieve higher energy density, significant improvement of LCO’s packing density has been recently done by controlling the particles morphology and electrode processing. However, the upper charge cutoff voltage of LCO has barely changed, and would be a way to further enhance the energy density.In this PhD, we focus first in a careful preparation of different LCO samples with an accurate control of the Li stoichiometry (1.00 ≤ Li/Co ≤ 1.04) and particles size to characterize their electrochemical properties. For some selected samples, we study the phase transition mechanisms involved at high voltage during Li de intercalation using in situ synchrotron X-ray diffraction (SXRD): more phase transitions than previously reported have been evidenced for the stoichiometric LCO (Li/Co = 1.00) charged up to 5.2 V. In particular, while the formation of the H1 3 and O1 phases is confirmed, intermediate intergrowth structures are also stabilized. The existence of defects in overlithiated LCO (Li/Co > 1.00) does not hinder, but delay the formation of the high voltage of H1 3 and O1 phases, although structurally modified.In a second part, we focus on the material optimization though 4% Al-doping using a solid state route. Several compounds were prepared using various Li/(Al+Co) stoichiometries, with different particles sizes. Our efforts were dedicated to accurately characterize the Al doping homogeneity in the samples that affects the electrochemical properties. Using SXRD and 7Li, 27Al and 59Co MAS NMR as complementary tools, we show that homogeneous Al-doping in stoichiometric LCO can be achieved using Li-excess in a first step of the synthesis followed by a stoichiometry readjustment to Li/(Co+Al) = 1.00
Dahmane, Yassir. "Gestion d'énergie optimisée étendue véhicules infrastructures." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0047.
Повний текст джерелаThis PhD thesis is part of the Renault/Centrale Nantes chair on improving the performance of electric vehicles (EV/PHEV). It is dedicated to the problem of the charging management of electric vehicles, using optimization algorithms and smart charging strategies. In this framework, several contributions have been proposed on the topics of smart charging of an EV and the smart energy management of an EV fleet, considering the mobility constraints (desired SOC at the end of the charging and departure time), the temperature of the Li-ion bat teries, the charging infrastructures, and the power grid. On the subject of smart charging of an EV, the contributions focused on the development of embedded algorithms allowing the scheduling of the charging power profile in order to reduce the charging cost. The proposed algorithms take into account the mobility needs of electric vehicle users, and the effect of temperature on the charging power of Li-ion batteries. On the subject of fleet energy management, the contributions focus on centralized algorithms in electric vehicle charging stations. An unidirectional recharging algorithm has been proposed in or der to evaluate the optimal number of electric vehicles to be recharged with a good level of satisfaction of mobility constraints and without any infrastructure reinforcement. The switch to the bidirectional algorithm is due to the exploitation of the V2G functionality, which will allow the participation of electric vehicles in frequency regulation. The proposed contributions on the first topic have the advantage of increasing the estimation accuracy of final SOC in very low temperature, and to be embedded on the EV due to the low computational capacity of the algorithms and the speed of execution. On the other hand, the EV fleet charging manage ment algorithms allow the possibility of large-scale integration of electric vehicles on the grid and show the potential of EVs in contributing to the stability of the power grid by offering ancillary services such as frequency regulation. The algorithms and strategies developed have been tested in simulation and will be tested on an EV charging system. The results obtained have highlighted the benefits of smart charg ing on cost reduction and grid benefits and the importance of electric vehicle fleet charging management in the development of grid services
Düllmann, Vasques Pereira Joana Lena. "Decarbonizing Public Bus Transport – a case study on Curitiba, Brazil." Thesis, KTH, Energi och klimatstudier, ECS, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226560.
Повний текст джерелаA poluição atmosférica é um problema sério em praticamente todas as grandes cidades do mundo, sendo a sua origem mais comum, o uso de combustíveis fósseis em motores de combustão, tanto em veículos de uso privado como em veículos de transporte coletivo. No entanto, tecnologias alternativas, tais como o uso de biocombustíveis, e a utilização de veículos híbridos e elétricos, estão em expansão. Esta tese tem como objectivo avaliar a configuração ideal do sistema, utilizando, num subgrupo da rede de transportes de Curitiba, uma combinação de tração elétrica e de uso de biocombustíveis. Esta avalição é feita através da aplicação de dois modelos de optimização: menor consumo energético e menor custo global. Com base nestes dois modelos, o consumo energético e os custos globais, bem como as emissões de gases de efeito de estufa (GEE), podem ser calculados para os diferentes cenários, de modo a se identificarem as vantagens da transição para um sistema de baixo carbono. Acresce que estes dois modelos podem ser usados por planeadores e decisores, como ponto de partida na definição do caminho a seguir para a transição para um sistema de transporte mais ecológico. Os resultados da otimização do consumo energético, indicam que a eletrificação é fundamental para reduzir o consumo total de energia, pois esta tecnologia é, de longe, a mais eficiente em termos energéticos. Uma redução do consumo total de energia em 12% poderá ser alcançada em relação ao cenário actual (que use apenas o diesel B7) e as emissões de CO2 poderão ser reduzidas em 74%. Na otimização de custos, os resultados mostram que a eletrificação ainda não é competitiva em termos de custos, quando comparada com o uso de biocombustíveis (biodiesel, bioetanol e biogas), uma vez que o biodiesel é a única tecnologia selecionada pelo modelo por ter menores custos associados. No entanto, se os custos da eletricidade forem reduzidos, nomeadamente, através da diminuição ou supressão de impostos, a eletrificação torna-se uma solução atrativa. Numa situação de redução do preço da energia elétrica em 40 %, o consumo de energia é reduzido em 5% e as emissões de GEE são reduzidas para 30%. Vontade política e estratégias destinadas a diminuir o custo dos veículos elétricos, tornam-se essenciais para promover a eletrificação dos transportes públicos. Acresce que, a adaptação dos horários e a organização dos principais terminais de transporte, são necessários para possibilitar a operacionalidade dos ônibus elétricos. De acordo com os resultados dos dois modelos, o número de estações de recarga rápida é aproximadamente igual ao número de rotas de ônibus a serem eletrificadas. A redução de custos alcançada, partilhando um carregador entre rotas electrificadas com paragens inicial/final comuns, é crucial para garantir a atratividade da mobilidade eléctrica. Isto sublinha a importância dos benefícios de uma análise holística da infrastrutura de recarga nas redes de transporte público coletivo.
Luftföroreningar är en stor utmaning i städer runt om i världen. Den gemensamma orsaken är användningen av förbränningsmotorer med fossila bränslen i både privata och kollektiva transportsätt. Dock alternativt teknik, såsom biobränslen, hybrid- och batterielektriska fordon, har uppmärksammats och deras användning ökar. Syftet med denna avhandling är att bedöma det optimala systemets konfiguration - en kombination av elektrisk drivkraft och användningen av biobränslen - i Curitibas allmänna bussnät genom tillämpning av två optimeringsmodeller – en som minimiserar energiförbrukning och en som minimizerar kostnader. Baserat på dessa modeller, de totala utsläpp och energiförbrukningen, samt deras respektiva kostnader kan beräknas för olika scenarier. På detta sätt fördelarna med att byta till ett kolfrisystem identifieras. Dessutom kan dessa modeller användas av planerare och beslutsfattare som utgångspunkt för att definiera strategier mot en renare transportsystem. Resultaten från energioptimering indikerar att elektrifiering är nyckeln till att minska systemets energiförbrukning, eftersom denna teknik är överlägset mest energieffektiv. En minskning på 12% skulle kunna uppnås, jämfört med det utgångsscenariot (endast med diesel B7) och koldioxidutsläppen skulle kunna minska med 74%. Kostnadsoptimeringen visar att elektrifiering ännu inte är kostnadseffektiv jämfört med andra biobränslen (biodiesel, bioetanol och biogas). I detta scenario är biodiesel den enda tekniken som valts av modellen på grund av dess lägre kostnad. Men om elkostnaderna minskas blir elektrifiering ett attraktivt alternativ till biobränslen. Detta skulle kunna uppnås, till exempel, genom skattebefrielse. Under dessa förutsättningar (40% lägre elpris) minskas energiförbrukningen med 5% och utsläppen minskar med30%. Politisk vilja och strategier för att minska fordonskostnaden visar sig vara avgörande för att stödja elektrifiering av kollektivtrafiken i Curitiba. Dessutom anpassningar av tidstabellerna och organisationen av de viktigaste bytespunkter är nödvändiga. Antalet snabba laddstationer är vanligtvis i linje med antalet busslinjer som ska elektrifieras. Kostnadssynergier uppnås genom att dela kostnaden för en laddare bland elektrifierade linjer med ett gemensamt start / slutstopp. Det är avgörande för att säkerställa e-mobilitetens attraktivitet. Det visar också vikten av att analysera infrastrukturbehoven i kollektivtrafiknätet holistiskt.
Yamegueu, Nguewo Daniel. "Experimentation et optimisation d'un prototype de centrale hybride solaire pv/diesel sans batterie de stockage : validation du concept "flexy energy"." Ouagadougou, 2012. http://www.theses.fr/2012PERP0001.
Повний текст джерелаAn original ‘‘Flexy Energy’’ concept of hybrid solar PV/Diesel power plant, without battery storage has been developed by the Solar Energy and Energy Saving laboratory (SEESL) of 2iE foundation. This concept consists of decentralized electricity generation trough hybrid solar PV/Diesel generators systems without energy storage in batteries and with a smart management of the energy production and loads in the system. This thesis joins in the framework of the validation of this concept. In this sense, an experimental prototype based on this concept has been set up. This facility consists of a PV array of 2. 85 kWp coupled with a diesel generator rated at 9. 2 kW via a single phase inverter of 3. 3 kW. First, the experimental study of the “Flexy Energy” prototype shows that the system is efficient for periods of higher solar radiations and for higher loads. Indeed, this situation allows each generator (PV and Diesel) to operate in optimal way. This part of the study has pointed out the importance of a smart management of the energy production and loads in such a facility, in order to enhance its efficiency whatever are load conditions. A second aspect of the experimental study has concerned the impact of the PV generator on the grid electrical parameters. The voltage and current harmonic distortions, voltage unbalance and voltage rise are studied. Finally, this work concerns the modeling of hybrid PV/Diesel systems without storage. The model developed is a first stage for numerical applications (software or software package), useful in the sizing and the optimization of such systems with a smart management of energy production and loads
Mesbahi, Tedjani. "Influence des stratégies de gestion d’une source hybride de véhicule électrique sur son dimensionnement et sa durée de vie par intégration d’un modèle multi-physique." Thesis, Ecole centrale de Lille, 2016. http://www.theses.fr/2016ECLI0004/document.
Повний текст джерелаThis thesis contributes to the improvement of hybrid embedded source performances supplies an electric vehicle. The studied solution is composed of Li-ion batteries and supercapacitors hybridization, with an aim to achieve improved performances in terms of weight and lifetime over traditional solutions. Our main goal is to take the best advantage of new energy management strategies of the hybrid embedded source and quantify obtained improvements. A multi-physic model including electric, thermal and aging behaviors is developed and integrated into the algorithm of energy management in order to evaluate the gradual degradation of storage components performances during driving cycles and implemented control strategy. New energy management strategies intended to act on the lifetime of hybrid embedded source have been evaluated. Their impact on the performances of the source in terms of weight, cost and lifetime has been quantified and clearly shows that it is possible to make better use of hybrid embedded source thanks to a good power sharing, thus opening the way to new approaches of energy management for these systems
Abdelghani-Idrissi, Soufiane. "La charge rapide d'une batterie métal-air par la maîtrise de la fluidique diphasique." Electronic Thesis or Diss., Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLS013.
Повний текст джерелаThe fast charge of metal-air batteries represent one of the main scientific and technical challenges facing this technology. Oxygen bubbles formed during the charge process has a negative impact on the performances of the cells. Using flowing electrolyte for the evacuation of oxygen bubbles leads to a decrease of the electric potential of the gas evolving electrodes. For a given current, the electrode has more active surface, decreasing its potential. Optical measurement under microscope shows the bimodal distribution of the bubbles sizes. This repartition trends to a uni-modal distribution when the flow rate of the electrolyte increases. Those electrochemical and optical characterizations bring information to develop an analytical modelling for the predictions of the dynamic behavior of these systems. A numerical simulation is also proposed to complete the analytical model. This simulation is able to reproduce the oscillatory behavior at high currents. The optimization of the energy efficiency of the process is done by calculating and choosing an optimal flow rate, corresponding to the best balance between the power gained and the hydraulic power consumed by the flow. The decrease of the hydraulic power needed is done by the adaptation of the geometry of the flow cells. Triangular configuration for the inlet and outlet zones of the flow are tested and shows better characteristics for natural and forced evacuation of the bubbles. A preliminary study and outlooks of the effect of flowing electrolyte on zinc dendrites are presented. Flowing electrolyte increase the time before a short-circuit occurs
Lagorce, Jérémy. "Modélisation, dimensionnement et optimisation des systèmes d'alimentation décentralisés à énergie renouvelable - application des systèmes multi-agents pour la gestion de l'énergie." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2009. http://tel.archives-ouvertes.fr/tel-00604024.
Повний текст джерелаKaroui, Fathia. "Optimisation de stratégies de gestion des batteries au plomb utilisées dans les systèmes photovoltaïques." Phd thesis, Grenoble INPG, 2007. http://tel.archives-ouvertes.fr/tel-00723068.
Повний текст джерелаSemassou, Guy Clarence. "Aide à la décision pour le choix de sites et systèmes énergetiques adaptés aux besoins du benin." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14450/document.
Повний текст джерелаThe analysis of the wind sites and the solar possibilities of Benin led the works towards the energy systems, of the autonomous photovoltaic type, coupled with batteries of storage. These appropriate energy systems were analyzed, modelled and optimized. The criteria of optimization arise from a survey realized in near the persons in charge who take care of questions of electrification in rural areas, of selected professionals who play a major role in the decision-making of the projects of electrification in rural areas, local associations which benefited from these projects in Benin, from technicians and from users of these systems. These criteria are organized into a hierarchy according to the method AMDEC. A method of adapted optimization was realized; she appeals to an original vision of level-headedness
Savard, Christophe. "Amélioration de la disponibilité opérationnelle des systèmes de stockage de l'énergie électrique multicellulaires." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI111/document.
Повний текст джерелаHigh-capacity electrical energy storage system (EESS) are often matrix-organized system with a large number of elementary storage cells. Due to manufactoring tolerances and their individual use, the electrical characteristics of these cells do not evolve in the same way. These imbalances reduce operative dependability, in the short term by contributing to a decrease of the charge-discharge capacity, in the long-term by shortening lifetime. To improve storage performance, redundant cells can be added. It is also possible, in order to increase efficiency of stored energy restitution, to balance electrical characteristics by using energy exchange forced by an adequate configuration. It should therefore be possible to increase long-term operative dependability by reconfiguring internal connections in dynamic mode. Parallel-series (PS) architecture EESS consists of the series association of blocks, made up of several cells connected in parallel. Series-Parallel dual solution (SP) associates strings of cells in parallel. If other architectures are being studied, often requiring several switches per cell to reconfigure the matrix, we propose in this thesis a new architecture, called C3C, satisfying an acceptable level of reliability and distributing current flows. We then compare the classic solutions and the C3C in terms of reliability and the long-term operative dependability and propose a reflection on the possibilities to discrete control aspects to pilot architecture with a suitable control algorithm. The reliability of any structure can be improved by redundancy, with additional cells that will be used either to replace failing cells or temporarily supplemeting the weak ones. The system may also be designed to tolerate the defect of a portion of the cells. We demonstrate by modeling reliability diagrams and Markov chains that the C3C and PS architectures have a much eigher level of reliability than a SP architecture. The sustainability of these structures can also be improved by piloting activating and rest of the available resources according to different strategies in a choice algorithm based on SoC (State of Charge) or SoH (State of Health) of each cell. To do this, we model a cell on Matlab, precisely simulating the aging parameters and their dynamic evolution. It emerges that, whatever the architecture, if it includes a minimal share of redundant cells, an adequate differentiated management of the cells allows an improvement of the long-term operative dependability of nearly 40% on average. In order to study the reconfigurability control of architectures, we propose a model based on Discrete Event Systems through a colored Petri net. Simulation of this model has reinforced the behaviors already identified
Debert, Maxime. "Stratégies optimales multi-critères, prédictives, temps réel de gestion des flux d'énergie thermique et électrique dans un véhicule hybride." Phd thesis, Université d'Orléans, 2011. http://tel.archives-ouvertes.fr/tel-00867007.
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