Dissertationen zum Thema „Electrical sizing“
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Chauveau, Clément. „Sizing of the French secondary sources“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285575.
Der volle Inhalt der QuelleDe studier som genomförts i detta examensarbete kommer från ett större projekt, frånENTSO-E (gathering of the European Transmission System Operators (TSO)) med fokus på enpresentation av en europeisk plattform för utbyte av balanserad energi från frekvensåterställnings reserven. Frekvens återställnings reserven är kraftreserver som gör det möjligtför en TSO (systemansvarig) att balansera förbrukningen och produktionen. Behandlingen avdessa reserver är därför strategisk för en TSO. RTE (den franska TSOn) deltar i dettaeuropeiska projekt och detta har medfört att RTE ifrågasätter sin nuvarande sekundäramätmetod. Målsättningen för mätmetoden är att veta vilket krav på reserven som behövsför nästa dag. Syftet med detta examensarbete är att utvärdera en ny mätmetod. För att nåmålet identifieras två deluppgifter. Den första är anpassningen av den mätmetod somföreslås av ENTSO-E. Denna nya mått metod bör tillämpas på det franska kraft systemet ochdess förutsättningar. Detta kräver vissa ändringar från den ursprungligt föreslagna metoden.Vi kommer att använda metoden i olika scenarier och med olika parametrar.Den andra deluppgiften fokuserar på utvärderingen av de olika scenarierna och jämförelsenmed den aktuella mätmetoden. Utvärderingen kommer att undersöka tre aspekter för varjescenario: - Den statiska aspekten som undersöker de statiska egenskaperna för scenariots krav. - Den dynamiska aspekten som utvärderar effekterna av scenariots krav på elnätet. - Den ekonomiska som undersöker scenariots kostnad. Slutsatsen är att RTE kommer att kunna använda ett par uppsättningar av de scenarier somär tillämpliga på det franska systemet med tillfredsställande resultat till att kunna välja detbästa scenariot med tanke på dess kostnad och effektivitet.
Gregory, Peter. „Analysis of sedimenting Kaolin suspensions by miniaturised Electrical Resistance Tomography“. Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302456.
Der volle Inhalt der QuelleCoppez, Gabrielle. „Optimal sizing of hybrid renewable energy systems for rural electrification“. Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10274.
Der volle Inhalt der QuelleThis project has the objective of creating a tool for feasibility assessment and recommendations of sizing of hybrid renewable energy systems in rural areas in South Africa. This involves the development of a tool which would analyse information input about the climate of the area and the load demand.
Kuo, Irene Y. (Irene Yunchia) 1976. „A methodology for sizing components in a dual-voltage automotive electrical system“. Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80198.
Der volle Inhalt der QuelleIncludes bibliographical references (p. 113).
by Irene Y. Kuo.
S.B.and M.Eng.
Wills, William Noah. „A General Method for Sizing Battery Energy Storage Systems for Use in Mitigating Photovoltaic Flicker“. Thesis, University of Missouri - Columbia, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13850758.
Der volle Inhalt der QuelleA method for sizing battery energy storage (BES) systems for use in mitigating voltage flicker caused by solar intermittency in photovoltaic generation was developed. The method creates a “design day” from existing solar data and designs the power and energy requirements for a BES system that can help a photovoltaic facility mitigate flicker caused by solar activity associated with the design day. An economic analysis of lead-acid and lithium-ion options for the BES was also developed. The method was then applied to a proposed photovoltaic project in the Midwestern United States.
Bagheri, Rajeoni Alireza. „ANALOG CIRCUIT SIZING USING MACHINE LEARNING BASED TRANSISTORCIRCUIT MODEL“. University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1609428170125214.
Der volle Inhalt der QuelleCameron, Grant Arthur 1960. „A model and algorithm for sizing and routing DCS switched telecommunications networks“. Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282772.
Der volle Inhalt der QuelleKlasson, Alexander, und Philip Melin. „Battery Sizing and Placement in the Low Voltage Grid including Photovoltaics“. Thesis, Linköpings universitet, Fordonssystem, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-166795.
Der volle Inhalt der QuellePanagiotou, Konstantina. „Design recommendations and sizing guidelines for small scale grid-connected decentralised energy systems“. Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55365/.
Der volle Inhalt der QuelleTan, Chin Hwee. „Optimization of power and delay in VLSI circuits using transistor sizing and input ordering“. Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35979.
Der volle Inhalt der QuelleNaziri, Moghaddam Iman. „Optimal Sizing and Operation of Energy Storage Systems to Mitigate Intermittency of Renewable Energy Resources“. Thesis, The University of North Carolina at Charlotte, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10791200.
Der volle Inhalt der QuelleIncreased share of Renewable Energy Sources (RES) in the generation mix requires higher flexibility in power system resources. The intermittent nature of the RES calls for higher reserves in power systems to smooth out the unpredictable power fluctuations. Grid-tied energy storage systems are practical solutions to facilitate the massive integration of RES. The deployment of Battery Energy Storage Systems (BESS) on the power grids is experiencing a significant growth in recent years. Thanks to intensive research and development in battery chemistry and power conversion systems, BESS costs are reducing. However, much more advancements in battery manufacturing as well as additional incentives from the market side are still needed to make BESS a more cost-effective solution. Planning and operation of the BESS significantly influence its profitability. It is quite important to find optimal sizes of batteries and inverters. Sizing of the BESS for two different applications is addressed in this work. In the first application, the BESS is co-located with Pumped Storage Hydro (PSH) to meet the Day-Ahead (DA) schedule of wind generation. In the second application, a method for BESS sizing in the presence of PV-induced ramp rate limits is proposed. In this thesis, two methods based on Receding Horizon Control (RHC) for the optimal operation of the BESS are introduced. A co-located BESS and wind farm is considered in both methods. In one method, electricity market participation is not considered, and the goal is solely meeting the DA schedule utilizing the BESS. A novel predictive control method is proposed in this part and the efficiency of the method is evaluated through long-run simulations using actual historical wind power.
In the second scenario, market participation of the BESS is taken into account. The deviation from the DA schedule can be compensated through the BESS, or by purchasing power from the real-time electricity market. The optimization problem based on physical and operational constraints is developed. The problem is solved through an RHC scheme while using updated wind power and electricity price forecasts. In this thesis, a Ridge-regression forecast model for electricity price and an ARIMA forecast model for wind power are developed. Simulation results using actual historical data for wind power and electricity price demonstrate that the proposed algorithm increases the average daily profit. In order to evaluate the impact of the BESS lifetime and price on average daily profit, different scenarios are defined and simulated. Although they increase the complexity of the problem, much more realistic result might be obtained when all details and constraints are considered.
Kross, Cory Kenneth. „A Method for Evaluating Aircraft Electric Power System Sizing and Failure Resiliency“. DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1709.
Der volle Inhalt der QuelleChanda, Soumendu. „Powertrain Sizing and Energy Usage Adaptation Strategy for Plug-in Hybrid Electric Vehicles“. University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1208385855.
Der volle Inhalt der QuelleGebresilassie, Yosef. „Sizing and modeling a microgrid containing renewable energy production, energy storage, electrical vehicles and other green technologies“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289328.
Der volle Inhalt der QuelleEtt mikronät som innehåller olika förnyelsebara energikällor behöver designas optimalt för kunna ha en både ekonomisk och teknisk genomförbar investering. I detta projekt studerades ett mikronät för en bostadsförening i Hudiksvall. Syftet med detta projekt var att studera hur elbilar kommer att kunna försörja nätet vid olika tillgänglighetstider hos bilarna. Utöver det syftade det här projektet också på att uppskatta den optimala effekten på solceller och solfångare för bostadsföreningen samt möjligheterna för energilagring för att utöka konsumtionen av närproducerad el och värme. En simulering i MATLAB/SIMULINK utfördes för att studera elbilarnas roll i att försörja mikronätet. För att få en bild av den optimala effekten på solcellerna utfördes en livscykelkostandsanalys. Den optimala effekten för solfångarna har beräknats genom f -chart metoden. Resultaten från denna studie visar att högre batterikapacitet på elbilar kommer att krävas när elbilarna är kopplade till mikronätet för längre perioder. Detta beror på den höga effektproduktionen från solcellerna samt den begränsade nivån för laddning/urladdning av elbilarnas batteri. Livcykelkostnadsanalysen gav ett lägre nuvärde samt längre återbetalningsperioder då en högre kapacitet på solcellerna installerades. Känslighetsanalysen som utfördes visar att nuvärdet av investeringen är mest känslig för investeringskostnaden. Med f -chart metoden kunde slutsatser gällande optimal solfångare och termisk energilagring dras.
Nonaka, Alan. „Boost Converter Inductor Sizing Effects on the Performance of MPPT Algorithms“. DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2229.
Der volle Inhalt der QuelleKhasawneh, Hussam Jihad. „Sizing Methodology and Life Improvement of Energy Storage Systems in Microgrids“. The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429638668.
Der volle Inhalt der QuelleMehra, Varun S. M. Massachusetts Institute of Technology. „Optimal sizing of solar and battery assets in decentralized micro-grids with demand-side management“. Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108959.
Der volle Inhalt der QuelleThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 199-209).
Solar-based community micro-grids and individual home systems have been recognized as key enablers of electricity provision to the over one billion people living without energy access to-date. Despite significant cost reductions in solar panels, these options can still be cost-prohibitive mainly due over-sizing of generation assets corresponding with a lack of ability to actively manage electricity demand. The main contribution shared is the methodology and optimization approach of least-cost combinations of generation asset sizes, in solar panels and batteries, subject to meeting reliability constraints; these results are based on a techno-economic modeling approach constructed for assessing decentralized micro-grids with demand-side management capabilities. The software model constructed is implemented to represent the technical characteristics of a low-voltage, direct current network architecture and computational capabilities of a power management device. The main use-case of the model presented is based on serving representative, aggregated, household-level load profiles combined with simulated power output from solar photovoltaic modules and the kinetic operating constraints of lead-acid batteries at hourly timesteps over year-long simulations. The state-space for solutions is based on available solar module and battery capacities from distributors in Jharkhand, India. Additional work presented also extends to real-time operation of such isolated micro-grids with requisite local computation. First, for load disaggregation and forecasting purposes, clustering algorithms and statistical learning techniques are applied on quantitative results from inferred load profiles based on data logged from off-grid solar home systems. Second, results from an optimization approach to accurately parametrize a lead-acid battery model for potential usage in real-time field implementation are also shared. Economic results, sensitivity analyses around key technical and financial input assumptions, and comparisons in cost reductions due to the optimization of solar and battery assets for decentralized micro-grids with demand-side management capabilities are subsequently presented. The work concludes with insights and policy implications on establishing differentiated willingness-to-pay, tiers of service, and dynamic price-setting in advanced micro-grids.
by Varun Mehra.
S.M. in Technology and Policy
S.M.
Collin, Philippe. „Design, taking into account the partial discharges phenomena, of the electrical insulation system (EIS) of high power electrical motors for hybrid electric propulsion of future regional aircrafts“. Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30116.
Der volle Inhalt der QuelleReducing CO2 emissions is a major challenge for Europe in the years to come. Nowadays, transport is the source of 24% of global CO2 emissions. Aviation accounts for only 2% of global CO2 emissions. However, air traffic is booming and concerns are emerging. For instance, CO2 emissions from air traffic have increased by 61% in Sweden since the 1990s. This explains the emergence of the "Flygskam" movement which is spreading in more and more European countries. It is in this context that the European Union launched in September 2016 the project Hybrid Aircraft Academic research on Thermal and Electrical Components and Systems (HASTECS). The consortium brings together different laboratories and Airbus. This project is part of the program "Clean Sky 2" which aims to develop a greener aviation. The ambitious goal is to reduce CO2 emissions and the noise produced by aircraft by 20% by 2025. To do that, the consortium is studying a serial hybrid architecture. Propulsion is provided by electric motors. Two targets are defined. In 2025, the engines must reach a power density of 5kW/kg, including the cooling system. In 2035, the power density of the engines will be doubled to reach 10kW/kg. To reach these targets, the voltage level will be considerably increased, beyond one kilovolt. The risk of electric discharges in the stators of electric motors is considerably increased. The objective of this thesis is to develop a tool to assist in the design of the primary Electrical Insulation System (EIS) of the stator of an electric motor controlled by a converter. It is organized in 5 parts. The first part begins by clarifying the issues and challenges of a greener aviation. The electric motor stator EIS is developed. Finally, the constraints that apply to the EIS in the aeronautical environment are identified. The second part presents the different types of electric discharges that can be found. The main risk comes from Partial Discharges (PD) which gradually deteriorate the EIS. The main mechanism for explaining the appearance of PD is the electronic avalanche. The Paschen criterion makes it possible to evaluate the Partial Discharge Inception Voltage (PDIV). Different techniques are used to detect and measure the activity of PD. Numerical models are used to evaluate the PDIV. The third part presents an original method for determining the electric field lines in an electrostatic problem. It only uses a scalar potential formulation. The fourth part presents an experimental study to establish a correction of the Paschen criterion. An electric motor winding is very far from the hypotheses in which this criterion was originally defined. Finally, the fifth part is devoted to the development of the SIE design aid tool. Graphs are generated to provide recommendations on the sizing of the various insulators in a stator slot. A reduction in the PDIV due to a combined variation in temperature and pressure is taken into account
Sergent, Aaronn. „Optimal Sizing and Control of Battery Energy Storage Systems for Hybrid-Electric, Distributed-Propulsion Regional Aircraft“. The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595519141013663.
Der volle Inhalt der QuelleNanewortor, Xoese Kobla [Verfasser], Harald [Akademischer Betreuer] Schwarz und Przemyslaw [Akademischer Betreuer] Janik. „A concept of renewable energy plant-storage capacity sizing for integration into electrical distribution network / Xoese Kobla Nanewortor ; Harald Schwarz, Przemyslaw Janik“. Cottbus : BTU Cottbus - Senftenberg, 2016. http://d-nb.info/1114666890/34.
Der volle Inhalt der QuelleYelamarthi, Kumar. „Process Variation-Aware Timing Optimization with Load Balance of Multiple Paths in Dynamic and Mixed-Static-Dynamic CMOS Logic“. Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1213880942.
Der volle Inhalt der QuelleTamimi, Ala. „Voltage stability limits for weak power systems with high wind penetration“. Diss., Kansas State University, 2011. http://hdl.handle.net/2097/13100.
Der volle Inhalt der QuelleDepartment of Electrical and Computer Engineering
Anil Pahwa
Shelli K. Starrett
Analysis of power system voltage stability has practical value in increasing wind penetration levels. As wind penetration levels increase in power systems, voltage stability challenges arise due to locating wind resources far away from load centers. This dissertation presents several different voltage stability methods for sizing new wind farms. Power system wind penetration levels depend on the available voltage stability margins (VSMs) of the existing power system and system load characteristics. Three new iterative methods have been developed to maximize wind penetration level in weak power systems based on systems’ VSMs. The first two methods use an iterative approach for increasing the size of each wind farm until reaching the collapse point. Wind farms with less negative impact on system VSMs are sized larger than others. A third wind farm sizing method has been developed using modal analysis in conjunction with the traditional voltage stability method (Q-V method). Wind farms are placed at buses in the power system which have the lowest negative impact on voltage instability modes (strong wind injection buses). By placing the wind farms at the strongest wind injection buses, higher amounts of wind power can be injected into the power system. To further increase wind penetration in weak power systems, two additional techniques are introduced and applied to the western Kansas power system. The first technique uses modes of voltage instability to place voltage support equipment like static var compensators at locations in the power system where they provide the needed reactive power support for increasing levels of wind penetration. The second technique uses the fact that wind patterns at a wind farm site may rarely allow the wind farm to produce its maximum capacity during the peak loading hours. Wind farm maximum sizes can be increased above their maximum voltage stable size limit without driving the power system into becoming voltage unstable. Preventing voltage collapse for the additional increases in wind farm sizes is accomplished by disconnecting some wind turbines inside the wind farm during critical times to reduce its power output to a voltage stable level.
Davis, Joseph P. „Electronic Interface for an Inductive Wear Debris Sensor for Detection of Ferrous and Non-Ferrous Particles“. University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1380998832.
Der volle Inhalt der QuelleMoisson, franckhauser Nicolas. „Development of methods and tools for the design and optimisation of Brushless Doubly-Fed Induction Machines for variable speed application in Hydro-generation“. Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT031/document.
Der volle Inhalt der QuellePumped-hydro storage plants (PSP) are important assets to stabilize electric grids.Variable speed technologies can improve the cycle efficiency and the power adjustability of PSPs. Current technologies such as fully-fed machines or Doubly-Fed Induction Machines (DFIM) have drawbacks. In this work, the focus will be on an unconventional design of variable speed machine: the Brushless Doubly-Fed Induction Machine (BDFM). The objectives are to better understand the working principles of this machine so as to size it, optimize it, and compare it to other types of variable speed machines.Following a review of sizing and optimization techniques for conventional machines, similar approaches are investigated for BDFMs. Two different methods for faster Finite-Element (FE) simulations of the BDFM are presented: a fast one without saturation considerations and another one based on the principle of magneto-harmonic simulations. A careful harmonic analysis combined with a comparison of cross-coupling tests between FE simulations and results of equivalent circuit found in the literature will lead to a modification of the BDFM equivalent circuit. A new method to determine the parameters of thisequivalent circuit from electrical tests is presented. The parameters determination from the geometry will also be considered for the elaboration of a derivable semi-analytical model. Such a model, paired with a 1st order optimization algorithm could be extremely powerful during the sizing of a BDFM. The potential of such an approach is shown in this work with the optimization of an Induction Machine
Gopalakrishnan, Harish. „Energy Reduction for Asynchronous Circuits in SoC Applications“. Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1324264498.
Der volle Inhalt der QuelleBoukir, Anass. „Outils pour l’optimisation du dimensionnement des infrastructures d’alimentation électrique de tramway ou de métro“. Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS668.
Der volle Inhalt der QuelleThe electrification of urban public transportation, such as trams, represents a major environmental challenge. The technical and financial studies for these projects cover various aspects of the infrastructure, such as excavation, civil engineering structures, railway track platforms, passenger buildings, electrical technology, and more. The objective of these studies is to propose technical solutions while evaluating costs, both in terms of investment and operation. The electric traction infrastructure is an important element in this equation, presenting a significant cost. It must meet transportation needs while adhering to financial and environmental goals. The sizing of this infrastructure aims to ensure the line's availability while optimizing costs. Technical studies for designing an electrical power supply system involve the selection and sizing of components that transport energy from the public grid to rolling stock, including traction substations, overhead contact lines, ground-level power supply, and connecting elements. These choices are based on simulation studies that require precise models and tools to avoid over-sizing the infrastructure due to uncertainties in simulation results. Moreover, compromises must be made between investment and operational costs on one hand and the infrastructure's capacity to handle traffic uncertainties on the other. The thesis's objective is to develop a multi-objective optimization approach to improve the sizing of electrical infrastructure, focusing on two main aspects: i/ the development of a railway electrical simulator with precision and execution speed compatible with optimization loop usage, and ii/ the development of a dimensioning optimization method that considers competing objectives. The thesis is structured into six chapters. After an initial general introduction, the second chapter delves into the issue of railway electrical infrastructure sizing and provides a review of the subject. The third chapter focuses on the railway simulator developed as part of the thesis. It covers the general principles, models, resolution methods, and post-processing of simulation results. The fourth chapter discusses the proposed infrastructure optimization approach, detailing the transformation of the business problem into a bi-objective optimization problem and the choice of the NSGA2 genetic algorithm for resolution. The implementation choices for this method are then presented. In the fifth chapter, the proposed optimization approach is applied to two case studies. The first is a simple test case with intuitive results, allowing for testing and refining the choice of crossover and mutation operators. The second case study involves a more complex real-project. The optimization results outperform those obtained through trial-and-error. Specifically, the optimizer can suggest a range of solutions that strike different balances between cost and reliability, providing engineers with objective decision-making criteria. In summary, the ultimate goal is to create a tool capable of optimizing the sizing of tramway electrical infrastructure while respecting technical specification
Audoit, Jérémie. „Optimisation de la conductivité électrique transverse de composites structuraux PAEK-fils submicroniques d'argent/fibres de carbone continues avec ensimage conducteur“. Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30001/document.
Der volle Inhalt der QuelleThis PhD thesis deals with the optimization of transverse electrical conductivity of Thermoplastic Carbon Fiber Reinforced Polymer. The influence of an electrically conductive sizing has been investigated. Silver nanoplates (AgNpts) have been successfully synthesized by a soft chemical reduction, with trisodiumcitrate (TSC) as surfactant. Silver nanoplates have been dispersed into a model matrix, percolation threshold has been determined near 5.9 % in volume fraction. This value is consistent with their moderate aspect ratio (between 12 and 28). Size and morphology of silver nanoplates are suitable for their dispersion in the sizing. Carbon fiber has been coated with conductive sizing. Carbon fiber will be further impregnated by a PAEK thermoplastic matrix. A higher conductivity level has been achieved by introducing silver nanowires in the PAEK matrix. Structural composites consisting of matrix-silver nanowires / continuous carbon fiber sized with conductive sizing have been elaborated. Their electrical conductivity reached 7 S.m-1 for a total silver volume fraction of 1 %.vol
Barnawi, Abdulwasa. „Hybrid PV/Wind Power Systems Incorporating Battery Storage and Considering the Stochastic Nature of Renewable Resources“. University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470357709.
Der volle Inhalt der QuelleChakraborty, Imon. „Subsystem architecture sizing and analysis for aircraft conceptual design“. Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54427.
Der volle Inhalt der QuelleBurton, Michael S. M. (Michael J. ). Massachusetts Institute of Technology. „Solar-electric and gas powered, long-endurance UAV sizing via geometric programming“. Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112414.
Der volle Inhalt der QuelleCataloged from PDF version of thesis.
Includes bibliographical references (pages 83-85).
Fueled by telecommunication needs and opportunities, there has been a recent push to develop aircraft that can provide long-endurance (days to weeks) persistent aerial coverage. These aircraft present a complicated systems engineering problem because of the multifaceted interaction between aerodynamics, structures, environmental effects, and engine, battery, and other component performance. Using geometric programming, models capturing the interaction between disciplines are used to analyze the feasible limits of solar-electric and gas powered, long-endurance aircraft in seconds to a level of detail and speed not previously achieved in initial aircraft sizing and design. The results show that long-endurance, gas powered aircraft are generally more robust to higher wind speeds than solar-powered aircraft, but are limited in their endurance by the amount of fuel that they can carry. While solar-electric powered aircraft can theoretically fly for months, they are operationally limited by reduced solar flux during the winter and wind speeds at higher latitudes. A detailed trade study between gas-powered and solar-powered aircraft is performed to discover which architecture is best suited to meet a given set of requirements, and what is the optimum size and endurance of that platform.
by Michael Burton.
S.M.
Geiß, Ingmar [Verfasser]. „Sizing of the Series Hybrid-electric Propulsion System of General Aviation Aircraft / Ingmar Geiß“. München : Verlag Dr. Hut, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021100123334382521757.
Der volle Inhalt der QuelleChoi, Tayoung Gabriel. „Modeling, Sizing and Control of Plug-in Light Duty Fuel Cell Hybrid Electric Vehicle“. The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1230712944.
Der volle Inhalt der QuelleHusain, Tausif. „DESIGN, ANALYSIS AND IMPLEMENTATION OF A NOVEL DOUBLE SIDED E-CORETRANSVERSE FLUX MACHINE WITH AXIAL AIRGAP“. University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500561964286682.
Der volle Inhalt der QuelleZenginis, Ioannis. „Optimal sizing and operation planning of microgrids and operation analysis of charging stations for electric vehicles“. Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/664711.
Der volle Inhalt der QuelleCondron, Ewell D. „Cost Savings Realized Through Proper Sizing of an Excessive Instrument Air System“. Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4428/.
Der volle Inhalt der QuelleOzden, Burak Samil. „Modeling And Optimization Of Hybrid Electric Vehicles“. Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615583/index.pdf.
Der volle Inhalt der QuelleZimmerman, Nathan. „Vanadium Redox Flow Battery : Sizing of VRB in electrified heavy construction equipment“. Thesis, Mälardalens högskola, Framtidens energi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-26918.
Der volle Inhalt der QuelleMALAGA, MANOLO MIGUEL PINTO. „DEVELOPMENT OF A METHODOLOGY FOR SIZING AN ELECTRIC ENERGY SUPPLY HIBRID SYSTEM FOR PEAK SHAVING AND COMMERCIAL SECTOR“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=16719@1.
Der volle Inhalt der QuelleQualquer atividade em uma sociedade moderna só é possível com o uso intensivo e eficiente de uma ou mais formas de energia. Das diversas formas de energia interessam, em particular, aquelas que são processadas e colocadas à disposição dos consumidores, tais como a energia elétrica. Neste trabalho é apresentado o desenvolvimento de duas metodologias que permitem gerar curvas de Capacidade de Carga a partir de (i) dados aleatórios de perfil de consumo de energia elétrica da PUC – Rio (ii) as contas (Faturas) da concessionária local. A seguir, faz-se uma analise econômica de investimentos que possa dimensionar o número ótimo de geradores de energia elétrica necessários para diminuir o custo deste investimento, tudo isto no setor comercial e no horário de ponta. As duas metodologias se ajustam a perfis reais de consumo, nos quais não se têm acesso a todos os dados desejados. Para validar as duas metodologias, utilizaram-se dados reais de consumo de energia elétrica cada 15 minutos e durante quatro anos da PUC - Rio. A primeira metodologia mostra a geração das curvas de Capacidade de Carga fazendo uso da Função Densidade de Probabilidade, com dados de um mês qualquer. A segunda metodologia mostra como gerar a curva de Capacidade de Carga somente com as faturas fornecidas pela concessionária. Utilizou-se um programa computacional para a solução de sistemas de equações polinomiais de terceiro grau.
Any activity in modern society is only possible with intensive and efficient use of energy. Among the various forms of energy the most important are those that are processed by companies and distributed to consumers, such as electricity. This work presents the development of two methodologies that will allow us to generate load capacity curves from (i) Random data obtained from power consumption of the PUC - Rio (ii) Bills (invoices) from the local utility company. With this data we will do an economic analysis of investment performed. This analysis can help us choose the optimum number of generators of electrical energy required to reduce the cost of the electricity supplied, all within the framework of the commercial sector and at peak hours. Both methods will be validated with the real power consumption, every fifteen minutes during four years from the energy profile of the PUC - Rio. The first method shows how we can generate load capacity curves making use of a statistic function called Probability Density, using data of any month. The second method shows how one can create the load capacity curves with only the invoices obtained from the local utility company. For this second methodology the program EES (Engineering Equation Solver) was used to solve systems of polynomial equations of the third degree.
Grahn, Pontus. „Utilization of a tailormade condition monitoring device for third party motors“. Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235281.
Der volle Inhalt der QuelleSammhället rör sig idag mot digitalisering och industrin är ej ett undantag. Siemens harutvecklat en trådlös underhållsmätare kallad Simotics Connect för att hjälpa dem strävamot en värld inom digitalisering. Simotics Connect hat tre inbyggda sensorer. En för temperatur,en för vibrationer och en för magnetisk flödestäthet, vilket är nytt på marknaden.Detta masterprojekt har undersökt användningen av Simotics Connect för tredjepartsmotorer,vilket ej har gjorts tidigare.Fyra områden undersöktes, statusen på den nuvarande marknaden, en motorgeometriuppskattningmodellbaserad på namnskylsdata, en temperaturmodell för att beräknamotorns tvärsnittstemperatur och, slutligen, en statorströmmodell som använder sig avmagnetiska flödestäthetsmätningen.Marknadsundersökningen har visat att det finns ett utrymme för Simotics Connectatt blomstra inom på den nuvarande marknaden.Motorns geometriska uppskattning, som är baserad i preliminär elektromagnetiskgeometribestämning, skapar en digital tvilling av motorn som är tillräckligt noggrann föratt aggera som ett verktyg vid t.ex. temperatursberäkningar men saknar noggrannhet förmer avancerade och känsliga beräkningar, t ex för användbarhet inom magnetisk flödestäthetsberäkningar.Temperaturmodellen som presenteras visar stor noggrannhet vid beräkning av statornstvärsnittstemperatur, men noggrannheten minskar för rotorns tvärsnittstemperatur.En statorströmmodell föreslås med ett proportionellt förhållande mellan magnetflödesdensitetenoch statorströmmen. Resultaten indikerar ett linjärt förhållande, men användandetav den digitala tvillingen för att beräkna proportionell konstant konstateras attinte vara tillräckligt noggrann metod.
Nguyen, Huy Cuong. „Modélisation électrothermique de système électrique électronique automobile et pilotage de mosfet intelligents pour protéger les faisceaux, éviter les courts circuits aggravés et diminuer la masse de câblage“. Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14776/document.
Der volle Inhalt der QuelleOn various vehicles Electronic Control Unit (ECU), more and more members are controlled bya MOSFET circuits instead of a relay. In addition to the power switching function, the MOSFET maymeasure the current to the steering control of the body and / or to ensure that a diagnostic function. Wecall this type of component a smart power switch or Smart Switch. It is also provided in the SmartSwitch device power failure, if the internal heating caused by electrical current. With the latesttechnology, these components can also integrate control logic and an interface for connection to adigital microprocessor. This last characteristic motivates the subject of study in order to defineimproved protection laws against overheating caused by an electrical current.Indeed, from the point of view of electrical protection, the MOSFET has been designed toachieve the same characteristics as a fuse, with the additional possibility to be reset as a circuit breaker.The aim is to study the control laws that could lead to better monitor the thermal limits of an electricalconductor, especially in low current, so as to reduce the diameter (hence the cost) of son while ensuringbetter protection against short-circuit-impedance (short circuit resistance of a little less than thenominal resistance of the circuit, in a ratio between 1 and 3 for example)
Pornet, Clément [Verfasser], Mirko [Akademischer Betreuer] Hornung, Mirko [Gutachter] Hornung und Manfred [Gutachter] Hajek. „Conceptual Design Methods for Sizing and Performance of Hybrid-Electric Transport Aircraft / Clément Pornet ; Gutachter: Mirko Hornung, Manfred Hajek ; Betreuer: Mirko Hornung“. München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1162621184/34.
Der volle Inhalt der QuellePutra, Wing Hendroprasetyo Akbar. „Use of alternating current field measurement (ACFM) technique for sizing internal surface defects on thin-walled austenitic stainless steel pipes“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0030/MQ47469.pdf.
Der volle Inhalt der QuelleBasma, 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.
Der volle Inhalt der QuelleInitiatives 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
Devillers, Nathalie. „Caractérisation et modélisation de composants de stockage électrochimique et électrostatique“. Phd thesis, Université de Franche-Comté, 2012. http://tel.archives-ouvertes.fr/tel-00838733.
Der volle Inhalt der QuelleKovaltchouk, Thibaut. „Contributions à la co-optimisation contrôle-dimensionnement sur cycle de vie sous contrainte réseau des houlogénérateurs directs“. Thesis, Cachan, Ecole normale supérieure, 2015. http://www.theses.fr/2015DENS0033/document.
Der volle Inhalt der QuelleThe work of this PhD thesis deals with the minimization of the per-kWh cost of direct-drive wave energy converter, crucial to the economic feasibility of this technology. Despite the simplicity of such a chain (that should provide a better reliability compared to indirect chain), the conversion principle uses an oscillating system (a heaving buoy for example) that induces significant power fluctuations on the production. Without precautions, such fluctuations can lead to: a low global efficiency, an accelerated aging of the fragile electrical components and a failure to respect power quality constraints. To solve these issues, we firstly study the optimization of the direct drive wave energy converter control in order to increase the global energy efficiency (from wave to grid), considering conversion losses and the limit s from the sizing of an electrical chain (maximum force and power). The results point out the effect of the prediction horizon or the mechanical energy into the objective function. Production profiles allow the study of the flicker constraint (due to grid voltage fluctuations) linked notably to the grid characteristics at the connection point. Other models have also been developed to quantify the aging of the most fragile and highly stressed components, namely the energy storage system used for power smoothing (with super capacitors or electrochemical batteries Li-ion) and power semiconductors.Finally, these aging models are used to optimize key design parameters using life-cycle analysis. Moreover, the sizing of the storage system is co-optimized with the smoothing management
Konate, Lamine Boubacar. „Modélisation de la tenue diélectrique dans les grands intervalles d'air : application aux intervalles complexes“. Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC040.
Der volle Inhalt der QuelleThis thesis is devoted to the study of the positive discharge in large air gaps. The initial goal is to develop a model able to determine the voltage U50 and the k-factor, two important factors involved in the design of high voltage structures in complex geometries. To do this, a review of the discharge models available in the literature was done. We chose the circuit model developed by Professor Beroual’s group and applied to the positive discharge and also to the negative discharge. This model is based on an equivalent circuit diagram, his parameters varying with time according to the leader channel characteristics and the geometry of the discharge. The spread of the leader is based on a criterion related to the calculation of the field at its head and where the randomness of the discharge path is taken into account. As most of models found in the literature, this model applies only to the point-plane type interval. Part of this work was to extend the domain of applicability of this model to complex geometries. A detailed study of the rod-rod gap allowed us to validate our model in its ability to simulate an example of complex geometry. Moreover, experimental tests allowed us to compare the value of the U50 voltage determined using our model and the one from experiments for to this rod-rod geometry. The results are in good agreement with a margin of error of less than 5%. Given the good agreement resulting from the confrontation model - laboratory experience and the great similarity, large spark - atmospheric discharge, a positive lightning model was developed. This model allowed us to use for the first time the circuit model to model the lightning attachment process. The results obtained allow to validate the feasibility to find, to the standard methods of protection against lightning, digital alternative based on a simulation of lightning. An estimate of the field radiated by the leader channel was performed. This opens a way for the study of the interaction of these fields radiated with engineering systems
Allali, Nicolas. „Convertisseur haut rendement à dimensionnement réduit pour batterie hybridée puissance/énergie de véhicule électrique : Principe de source de courant contrôlée“. Thesis, Ecole centrale de Lille, 2016. http://www.theses.fr/2016ECLI0018/document.
Der volle Inhalt der QuelleThis thesis deals with the development of a power conversion solution, allowing for the coupling of two similar voltage sources. Applied to a combined battery storage sys-tem power/energy for electric vehicles, the proposed solution presents a compromise between production costs, mass and energy performance, providing a better solution than those currently in existence. As such, the two voltage sources are coupled in series with a controlled current source. A structure of the converter allowing the coupling is studied and compared to a classic structure. Finally a demonstrator on a reduced voltage scale has been realized and shows advantages of this converter solution
Sadoun, Redha. „Intérêt d’une Source d’Energie Electrique Hybride pour véhicule électrique urbain – dimensionnement et tests de cyclage“. Thesis, Ecole centrale de Lille, 2013. http://www.theses.fr/2013ECLI0009/document.
Der volle Inhalt der QuelleCurrently, the main embedded storage system supplying the electric vehicles is composed of Li-ion batteries. This thesis is one of the common themes of work that ESTACA leads in collaboration with L2EP. The objective of this work is to study the interest of a hybrid source composed of Li-ion batteries and supercapacitors to supply an urban electric.Firstly, an energy management strategy based on deterministic rules is developed to control the power between the battery and supercapacitor. To demonstrate the combination utility, different Li-ion battery technologies (Li-ion high power, high-Li-ion energy) are used on the sizing step. Through this study, we could propose an optimal solution (masses, volumes, costs...) consisting of battery and supercapacitor. In the second part, we have followed the evolution of capacity and the internal resistance losses of high power and high energy batteries type in, respectively, single-source and hybrid configurations. For this study, a test bench, developed for cycling and characterization of storage systems, was used. The results obtained provide the opportunity to choose Li-ion battery technology that could be the most interesting for the supply of electric vehicles
Cortez, Ernest. „Aportaciones al dimensionamiento y gestión de energía de un tren de potencia eléctrico híbrido para vehículos industriales con ciclos de conducción repetitivos y agresivos“. Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/668254.
Der volle Inhalt der QuelleActualmente, se ha incrementado el interés por mitigar la emisión de gases de efecto invernadero que se produce por un elevado consumo de combustible en vehículos industriales. Con la intención de contribuir en la reducción del consumo de combustible de un vehículo industrial, se ha propuesto incorporar al tren de potencia un sistema capaz de almacenar y suministrar energía eléctrica. En consecuencia, surge la necesidad de realizar el diseño de un tren de potencia eléctrico híbrido, a partir de la interconexión de los elementos (topología), el dimensionamiento de los elementos y/o la estrategia de gestión de energía del tren de potencia. En el presente trabajo se presenta una metodología para realizar el diseño de un vehículo eléctrico híbrido de recolección de basura, que presenta un ciclo de conducción repetitivo y agresivo como resultado de la actividad laboral. La metodología propuesta consiste en modelar el comportamiento de un tren de potencia eléctrico híbrido, considerando el comportamiento eléctrico de diversos elementos de acumulación de energía híbrido (baterías y supercapacitores). Se emplea un sistema embebido para realizar la caracterización experimental de una celda y un supercapacitor comercial, con el propósito de aproximar el comportamiento a través de un modelo eléctrico. En función de un ciclo de conducción real de un vehículo de recolección de basura se determina la demanda de energía para un vehículo eléctrico híbrido de recolección de basura. Por otra parte, se calcula el consumo de combustible a partir de un tren de potencia eléctrico híbrido que integra un sistema de almacenamiento de energía o un sistema de almacenamiento de energía híbrido. Se desarrolla una metaheurística bio-inspirada basada en una población estocástica) para determinar un espacio de soluciones óptimas. Posteriormente, se realiza el dimensionamiento óptimo de un sistema de almacenamiento de energía (baterías) y un sistema de almacenamiento de energía híbrido (baterías y supercapacitores), considerando diferentes problemas de optimización mono-objetivo y multi-objetivo. Con base en los resultados de cada problema de optimización, se procede a realizar un análisis comparativo con un elemento de acumulación comercial. Considerando un tren de potencia eléctrico híbrido que integra un sistema de almacenamiento de energía híbrido (baterías y supercapacitores), se desarrolla una estrategia de gestión de energía basada en lógica difusa, que incluye la identificación del estado del vehículo a partir de un ciclo de conducción real. Finalmente, se realiza la validación de la estrategia de gestión de energía a través del modelo de un vehículo eléctrico híbrido de recolección de basura.
Mkahl, Rania. „Contribution à la modélisation, au dimensionnement et à la gestion des flux énergétiques d’un système de recharge de véhicules électriques : étude de l’interconnexion avec le réseau électrique“. Thesis, Belfort-Montbéliard, 2015. http://www.theses.fr/2015BELF0264/document.
Der volle Inhalt der QuelleThe strong dependence on oil and ecological and environmental constraints force many car manufacturers to develop new research programs for the promotion of electric vehicles (EVs) and associated infrastructures. The embedded batteries into the EVs can be charged by the electrical network or by another source of renewable energy. In this context, the work presented in this thesis aims to study a system of EVs charging using solar energy through photovoltaic panels. To do so, a sizing study of the system has been proposed in order to evaluate the energy needs for an EV and determine the quantity of required energy for its propel. The key elements of the system have been sized: photovoltaic panels, storage battery (Lead-acid) and traction battery (Li-ion). From this sizing study and considering the EV characteristics, we determined the energy quantity required for itspropel. With the aim to study the behavior of each system component and analyze its adequacy with the charging process, a modeling study was conducted, and each element is represented by a mathematical model. The performed analysis and comparison of obtained results (simulation results and experimental results) allowed us to validate the developed models. In addition, this modeling study, allowed the validation of the choice of all components of charging system. In fact, the problem was formalized by a linear program with the aim to assign each EV to an adequate charging station. The assignment takes into account various constraints and characteristics of EVs, as well as those of charging stations, traffic conditions, interest points of drivers, etc. The proposed approach allowed to assign adequately and optimally EVs to charging stations while satisfying all constraints