Дисертації з теми "Electrical energy transmission, networks and systems"
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Clegg, Stephen. "Integrated modelling of electrical and gas transmission networks in multi-energy systems." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/integrated-modelling-of-electrical-and-gas-transmission-networks-in-multienergy-systems(e1b07a2b-8bd2-472d-8274-8d54978e9770).html.
Повний текст джерелаQiao, Wei. "Integrated control of wind farms, facts devices and the power network using neural networks and adaptive critic designs." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29716.
Повний текст джерелаCommittee Chair: Ronald G. Harley; Committee Member: David G. Taylor; Committee Member: Deepakraj M. Divan; Committee Member: Ganesh Kumar Venayagamoorthy; Committee Member: Thomas G. Habetler. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Lazaro, Orlando. "CMOS inductively coupled power receiver for wireless microsensors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51874.
Повний текст джерелаYow, Thiam Poh. "Tunneled data transmission over wireless sensor networks." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FYow.pdf.
Повний текст джерелаThesis Advisor(s): McEachen, John C. ; Tummala, Murali. "December 2007." Description based on title screen as viewed on January 24, 2008. Includes bibliographical references (p. 73-74). Also available in print.
Condò, Marco. "Electrical characterization of innovative insulating materials for HVDC energy transmission cable systems." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Знайти повний текст джерелаChen, Chao. "Energy-efficient electrical and silicon-photonic networks in many core systems." Thesis, Boston University, 2014. https://hdl.handle.net/2144/10962.
Повний текст джерелаDuring the past decade, the very large scale integration (VLSI) community has migrated towards incorporating multiple cores on a single chip to sustain the historic performance improvement in computing systems. As the core count continuously increases, the performance of network-on-chip (NoC), which is responsible for the communication between cores, caches and memory controllers, is increasingly becoming critical for sustaining the performance improvement. In this dissertation, we propose several methods to improve the energy efficiency of both electrical and silicon-photonic NoCs. Firstly, for electrical NoC, we propose a flow control technique, Express Virtual Channel with Taps (EVC-T), to transmit both broadcast and data packets efficiently in a mesh network. A low-latency notification tree network is included to maintain t he order of broadcast packets. The EVC-T technique improves the NoC latency by 24% and the system energy efficiency in terms of energy-delay product (EDP) by 13%. In the near future, the silicon-photonic links are projected to replace the electrical links for global on-chip communication due to their lower data-dependent power and higher bandwidth density, but the high laser power can more than offset these advantages. Therefore, we propose a silicon-photonic multi-bus NoC architecture and a methodology that can reduce the laser power by 49% on average through bandwidth reconfiguration at runtime based on the variations in bandwidth requirements of applications. We also propose a technique to reduce the laser power by dynamically activating/deactivating the 12 cache banks and switching ON/ OFF the corresponding silicon-photonic links in a crossbar NoC. This cache-reconfiguration based technique can save laser power by 23.8% and improves system EDP by 5.52% on average. In addition, we propose a methodology for placing and sharing on-chip laser sources by jointly considering the bandwidth requirements, thermal constraints and physical layout constraints. Our proposed methodology for placing and sharing of on-chip laser sources reduces laser power. In addition to reducing the laser power to improve the energy efficiency of silicon-photonic NoCs, we propose to leverage the large bandwidth provided by silicon-photonic NoC to share computing resources. The global sharing of floating-point units can save system area by 13.75% and system power by 10%.
Khan, Nabeel Pervaiz. "Energy efficient communication and rate control algorithms for wireless sensor networks." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 114 p, 2009. http://proquest.umi.com/pqdweb?did=1818417511&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Повний текст джерелаLopes, Luiz Antonio Correa. "On the utilization of force-commutated AC controllers in AC power transmission systems." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40387.
Повний текст джерелаThis thesis deals with the use of force-commutated Pulse Width Modulated (PWM) ac controller technology in phase-shifting and var compensation applications. The proposed technology employes as the building block a 4-switch PWM ac controller, which is controlled by means of duty cycle variation. The difficulties of using PWM in high power applications are overcome with a new multi-module PWM ac controller operated with symmetrically phase shifted carriers. This solution results in harmonic cancellation and consequently in high quality (less distortion) waveforms with the power switches (GTO) switching at low frequencies, thus keeping the communication losses low. The resulting power controllers can be considered as intermediate FACTS devices in terms of performance and flexibility.
An application of one phase-shifter and two var compensators in a tie line is also proposed for suppressing inter-area power oscillations. In this scheme the inter-area mode is deactivated if the FACTS devices keep constant the active and reactive power that flow in the tie line. Furthermore, the two interconnected subsystems were virtually decoupled with the proposed approach, in the sense that the small signal disturbances that occur in one side of the tie line do not affect the machines of the other side.
Farhat, Jamil de Araujo. "Eficiência energética e throughput seguros em decode-and-forward seletivo com alocação de potência distribuída." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1368.
Повний текст джерелаWe investigate the secure energy efficiency and throughput in cooperative wireless communications systems, in which a pair of legitimate users (Alice and Bob) are assisted by a relay node and the communication occurs in the presence of a passive eavesdropper (Eve). Several cooperative protocols are compared with respect to these measures and we use of an iterative and distributed algorithm, based on Dinkelbach algorithm, to allocate power between Alice and the relay. The power allocation is performed in order to increase the secure energy efficiency, measured in secure bits/J/Hz, or secure throughput, measured in secure bits/s/Hz. About the protocols, we consider the case where Alice has perfect knowledge only about the instantaneous channel state of the legitimate channel. So, we employ a Selective Decode-and-Forward (SDF) protocol, which chooses the best type of communication between Alice and Bob (direct or cooperative communication) in order to improve security. For comparison, we consider other classical cooperative schemes such as the Amplify-and-Forward (AF), the Fixed Decode-and-Forward (DF) and the Cooperative Jamming (CJ). Our results show that SDF outperforms AF, DF and CJ in most situations. However, when the transmit rate increases or when Eve is close to the legitimate nodes, CJ has a better performance.
Okumu, Elizabeth Mukhwana. "Performance evaluation of cross-layer energy-efficient transmit antenna selection for spatial multiplexing systems." Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28111.
Повний текст джерелаKailas, Aravind. "Toward perpetual wireless networks: opportunistic large arrays with transmission thresholds and energy harvesting." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34720.
Повний текст джерелаMilla, Ximena M. "Building Energy Management Systems Technology for HVAC, Lighting and Outlets with Smart Sensor Networks." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10978010.
Повний текст джерелаThis study was conducted as part of California State University of Long Beach (CSULB) Research Foundation project tittle “Internet of Things (IoT) and Ubiquitous Sensing in University Building Energy Management: Design, Optimization and Technology Demonstration” funded by the California Energy Commission (CEC) EEETD grant and led by Dr. Massoud Nazari. The Emerging Energy Efficient Technology Demonstrations (EEETD) grant of the CEC is aimed to demonstrate and market the deployment of innovative pre-commercial energy efficiency technologies in existing buildings to promote early adoption of energy efficiency systems that will reduce energy consumption as well as costs for the building owner.
Despite the technological advancements for building management systems the actual market penetration is still relatively small in the commercial sector. One of the reasons for not investing on upgrades includes informational awareness. In the hopes to aid in that particular aspect, the following study provides a breakdown of the process for the commissioning of the new management system and demonstrates the scalability of the overall project by first focusing on the existing building such as identifying the building’s energy end uses and circuit configuration for lighting, HVAC, and plug loads. Second, it details the customization for the new EMS, and the interoperability of the new smart devices and network architecture.
Liu, Jiashang. "Resource Allocation and Energy Management in Green Network Systems." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587577356321898.
Повний текст джерелаMARTINS, Cláudio Roberto Medeiros de Azevedo Braga. "ALOCAÇÃO DOS CUSTOS DO SISTEMA DE TRANSMISSÃO DE ENERGIA ELÉTRICA CONSIDERANDO A SEGURANÇA." Universidade Federal do Maranhão, 2013. http://tedebc.ufma.br:8080/jspui/handle/tede/1776.
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CNPQ
After implantation of the new economic model for power systems, a fair remuneration strategy of transmission companies has become a matter of great importance. This remuneration should be performed by system users, who must pay proportionally to its network usage. However, there is still no consensus about wich is the best criterion to be adopted to allocate these costs. The most widely used methods take into account the power ows only at normal operating conditions. however, it is recognized that the transmission system is planned and operated to accommodate power also at contingency scenarios, which requires additional transmission capacity. Moreover, part of the idle capacity is due to the characteristics of network investments and uncertainty in relation to demand. Thus, the costs allocated by these methods may not re ect the actual usage of the system. In this context, this work presents a transmission cost allocation method that takes into consideration all these network characteristics. The total costs are decomposed into three components, each of these associated with a part of the transmission capacity of the system and its function. These costs are then allocated based on their system usage in diferent operating scenarios. To validate the proposed method, tests are performed on small and medium power systems. Comparisons are established with some methods more used in the literature, where it is observed that the proposed method provides complete consistency with the expected results for the problem. It was also found that this method offers subsidies to consumers allowing them to define their security requirements.
Com a implantação do novo modelo econômico nos sistemas de potência, a adequada remuneração das empresas provedoras de serviços de transmissão tem se tornado um assunto de grande importância. Esta remuneração deve ser realizada pelos usuários do sistema, que devem pagar proporcionalmente ao seu grau de utilização da rede. No entanto, ainda não há um consenso do melhor critério a ser adotado para alocar estes custos. Os métodos mais utilizados levam em consideração os uxos de potência apenas quando a rede opera em condições normais. No entanto, sabe-se que o sistema de transmissão é planejado e operado para acomodar os uxos também em cenários de contingência, o que exige capacidade adicional de transmissão. Além disso, parte da capacidade ociosa é devido às características dos investimentos no setor e à incerteza em relação à demanda. Desta forma, os custos alocados por estes métodos pode não re etir a real utilização do sistema. Neste contexto, este trabalho apresenta um método de alocação dos custos pelo uso da transmissão que leva em consideração todas estas características da rede. Os custos totais são decompostos em três componentes, cada uma destas relacionada com parte da capacidade de transmissão do sistema e sua função. Estes custos são então alocados aos usuários da rede com base no seu grau de utilização do sistema em diversos cenários de operação. Para validar o método proposto, são realizados testes em sistemas de potência de pequeno e médio porte. Comparações são estabelecidas com alguns dos métodos mais aplicados na literatura, onde constata-se que o método proposto apresenta total coerência com os resultados esperados pelo problema. Veri ca-se ainda que este método oferece subsídios aos consumidores para que estes possam de nir quais seus requisitos de segurança.
Das, Choton Kanti. "Smart management strategies of utility-scale energy storage systems in power networks." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2209.
Повний текст джерелаNatarajan, Sriram. "SURGNET an integrated surgical data transmission system over collaborative networks /." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/257/.
Повний текст джерелаNajafi, Syed Ahmed Ali. "Energy Harvesting From Overhead Transmission Line Magnetic Fields." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548448189459464.
Повний текст джерелаPagonis, Meletios. "Electrical power aspects of distributed propulsion systems in turbo-electric powered aircraft." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9873.
Повний текст джерелаAguilera, Miguel. "Semantic and Physical Modeling and Simulation of Multi-Domain Energy Systems: Gas Turbines and Electrical Power Networks." Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214532.
Повний текст джерелаProjektet ITEA3 OpenCPS (Öppen, certifierad modelldriven utveckling för cyberfysiskasystem) fokuserar på interoperabilitet mellan standarderna för Modelica, Unified ModelingLanguage (UML) och Functional Mock-up Interface (FMI), förbättring av tidsåtgångenför (sam-)simulering, samt verifierad kodgenerering. Projektet syftar till att utveckla enplattform för modellering och simulering av cyberfysiska system och system somrepresenteras av olika sorters fysikaliska modeller (eng. multi-domain modeling). Ett av defrämsta användningsområdena för plattformen är ekvationsbaserad modellering ochsimulering av detaljerade gasturbinmodeller i elkraftverk (inklusive explicitekvationsbaserad modellering av dynamiken mellan termiska och roterande komponenter)som är sammankopplade med kraftsystemet.I detta examenarbete används klassdiagram i UML baserade på standarden för CommonInformation Model (CIM) och komponentdiagram från SysML för att beskrivakraftsystemet. En utvidgning baserat på ISO 15926-standarden föreslås för att härledasemantiken för modeller som integrerar både kraftsystemet och detaljerad dynamik förgasturbiner.Vidare så har Modelica, ett språk för modellering och simulering av olikartade fysikaliskasystem, utnyttjats för att skapa ekvationsbaserade modeller som utvecklats i detta projekt.En komparativ analys har genomförts för en detaljerad modell med termodynamik och enförenklad modell genom undersökning av både frekvenssvar och tidssimuleringar.Resultaten visar att skillnader uppstår mellan den detaljerade modellen och den ikraftsystemsammanhang allmänt använda modellen GGOV1, vilket kan förklaras medförenklingar i den snareSlutligen kan modeller från olika fysikaliska domäner utbytas mellan intressenter med s.k.Functional Mock-Up Units (FMU-enheter), som definieras av FMI-standarden. Lovanderesultat uppnåddes med simuleringsverktyg som stöder FMI-standarden vilket visarmöjligheten till ett otvetydigt utbyte av detaljerade gasturbinmodeller och elkraftsmodeller.Detta visar potentialen i FMI-standarden för modellutbyte mellan olikamodelleringsdomäner, vilket skulle kunna låta tillverkare att dela ekvationsbaserademodeller utan att ge upp immateriella tillgångar.
Zhou, Lin. "Energy efficient transmitter design with compact antenna for future wireless communication systems." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33104.
Повний текст джерелаSudhakaran, Sujith. "Impact of Renewable Energy Installations and Utilisation of Smart Energy Management Systems on low-voltage networks- a study case at Östergarnslandet, Gotland." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396208.
Повний текст джерелаFernandez, Irma Becerra. "Encryption-based security for public networks : technique and application." FIU Digital Commons, 1994. http://digitalcommons.fiu.edu/etd/3296.
Повний текст джерелаLim, Kok Seng. "Analysis of network management protocols in optical networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FLim%5FK.pdf.
Повний текст джерелаKrishnan, Narayanan. "Analysis of energy efficiency of cooperative MIMO schemes." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1427.
Повний текст джерелаHariharan, Srikanth. "Communication-Efficient Convergecasting for Data Fusion in Wireless Sensor Networks." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1317672795.
Повний текст джерелаSuzuki, Nayara Yuko. "Estudo de controle e proteção para sistemas de transmissão HVDC multiterminais baseados em conversores modulares multiníveis." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-20092018-112205/.
Повний текст джерелаThe growing interest in VSC-based HVDC (VSC-HVDC) transmission systems as an alternative to the current ones has required studies about the the main challenge associated with its application, which is the development of a protection scheme that is able to both fast and efficiently determine the protection zone where a fault may have happened so as to achieve selectivity. In order to study a protection system that complies with those requirements, a High-Voltage Direct Current (HVDC) transmission system with four terminals implemented with Modular Multilevel Converter (MMC) converters was simulated under contingency condition. Electrical quantities measured in one of the terminal\'s Direct Current (DC) links were used to determine the occurrence of a fault event in the system, as well as to decide whether that event belonged to the protection zone considered in the analysis. Spectra obtained via Fast Fourier Transform (FFT) over a window of the DC voltage measured in one of the terminals were observed in order to discriminate between internal and external fault events. From these observations, it was noticed that a certain characteristic, named here \"center of mass frequency\", varies according to the distance between the fault location and the terminal, fault resistance, as well as whether that the fault is either internal or external to the analysed protection zone. By using this characteristic, it was possible to tell internal faults with low resistance fault from other events. Considering this parameter only, it was not possible to correctly classify internal faults with high fault resistance.
Thanayankizil, Lakshmi. "Opportunistic large array (OLA)-based routing for sensor and adhoc wireless networks." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50374.
Повний текст джерелаQu, Yipeng. "Wireless Sensor Network Deployment." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/854.
Повний текст джерелаChen, Sheng. "Future development trends of optical transport network infrastructure an infrastructural framework for metropolitan-based optical transport networks : a field test of a Chinese ISP and a case study of a Chinese electrical power company /." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070822.115714/index.html.
Повний текст джерелаHa, Rick Wan Kei. "A Sleep-Scheduling-Based Cross-Layer Design Approach for Application-Specific Wireless Sensor Networks." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/918.
Повний текст джерелаParvez, Imtiaz. "Spectrum Sharing, Latency, and Security in 5G Networks with Application to IoT and Smart Grid." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3879.
Повний текст джерелаNilsson, Martin. "On Efficient Transmission Balancing Operation : Capturing the Normal State Frequency and Active Power Dynamics." Licentiate thesis, KTH, Elkraftteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221221.
Повний текст джерелаQC 20180116
Tonin, Fabianna Stumpf. "Caracterização de sistemas fotovoltaicos conectados à rede elétrica na cidade de Curitiba." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2876.
Повний текст джерелаIn the search for new options for the establishment of the energy matrix of Brazil, the Grid-Connected Photovoltaic Systems (SFVCR) are configured as an alternative to urban centers, because they allow the power generation at distributed mode, that is, generate energy at the place where it will be consumed and inject the surplus energy into the network. Faced with the prospect of installing Grid-Connected Photovoltaic System, the objective of this research is to characterize this type of photovoltaic system and also, analyze the results in terms of productivity parameters, such as Yield, Performance Ratio and Capacity Factor of six grid-connected systems that are installed in Curitiba. The radiation data used to calcute those parameters has been acquired from Instituto Nacional de Meteorologia (INMET). This paper highlight that the Parana state has 810 SFVCR (until April 2017) in operation, which stands for 5MW and Curitiba has 170 SFVCR, 865 kW in operation, and 80% of them are installed in residences. In addition, 98% of those systems use multicrystalline modules, 75% use single phase inverters and 95% of these use inverters transformerless, because the losses in the conversion process are reduced and the equipments are more compact and have more technology than the inverters with transformer. So, the main trend of photovoltaic energy market is to use transformerless inverters. The results obtained shows that the inverters’choice and the installation mode of the photovoltaic modules are important factors to maximize the photovoltaic system’s performance. In the end, the results demonstrates that the SFVCR contribute to distributed power generation and should be use in the elaboration of public policies with the purpose of encouraging projects and research in the photovoltaic energy’s area, aiming the dissemination of this renewable source of energy in Brazil.
He, Shengyang. "Modeling power system load using intelligent methods." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/12036.
Повний текст джерелаDepartment of Electrical Engineering
Shelli K. Starrett
Modern power systems are integrated, complex, dynamic systems. Due to the complexity, power system operation and control need to be analyzed using numerical simulation. The load model is one of the least known models among the many components in the power system operation. The two different load models are the static and dynamic models. The ZIP load model has been extensively studied. This has widely applied to composite load models that could maintain constant impedance, constant current, and/or constant power. In this work, various Neural Networks algorithms and fuzzy logic have been used to obtain these ZIP load model coefficients for determining the percentage of constant impedance, current, or power for the various load buses. The inputs are a combination of voltage, voltage change, and power change, or voltage and power, and the outputs consist of the ZIP load model coefficients for determining the type and the percentage of load at the bus. The trained model is used to predict the type and percentage of constant load at other buses using simulated transient data from the 16-generator system. A small study was also done using a dynamic induction machine model in addition to the ZIP load model. As expected, the results show that the dynamic model is more difficult to determine than the static model.
Yan, Zhaohui. "Performance Analysis of A Banyan Based ATM Switching Fabric with Packet Priority." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5199.
Повний текст джерелаRamadhani, Umar Hanif. "Uncertainty and correlation modeling for load flow analysis of future electricity distribution systems : Probabilistic modeling of low voltage networks with residential photovoltaic generation and electric vehicle charging." Licentiate thesis, Uppsala universitet, Byggteknik och byggd miljö, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434951.
Повний текст джерелаBarbosa, Carlos David Franco 1956. "Impactos do desempenho das emendas dos cabos de linhas de transmissão na confiabilidade de redes elétricas." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258416.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: Esta tese tem como objetivo estudar métodos de planejamento da expansão da transmissão de energia elétrica em mercados de eletricidade re-estruturados, tanto em um ambiente tradicional quanto com a adoção de inovações tecnológicas. No trabalho são estudados procedimentos de campo para as linhas de transmissão, considerando economia e confiabilidade, principalmente em emendas a compressão para cabos ACSR (Aluminum Core Steel Reinforced). O trabalho descreve os resultados de pesquisas efetuadas com fabricantes e concessionárias usuárias das emendas a compressão e ainda sugere alguns procedimentos e rotinas de inspeções para melhorar a confiabilidade do sistema. Os resultados dos testes com as emendas, realizados em laboratório, serviram para dar suporte para a analise de falhas, subsidiando a avaliação das causas de falhas mais frequentes no ambiente competitivo. Por fim foram apresentadas tecnologias emergentes com possibilidade de redução da taxa de falhas nos sistemas de transmissão de energia elétrica bem como as recomendações de boas praticas para o setor
Abstract: This thesis has as objective to study electricity transmission expansion planning In re-structured markets, both traditional as well as with technological innovations. In the work are studied transmission lines field procedures considering economy and reliability, mainly ACSR (Aluminum Core Steel Reinforced) compression splices. The work describes compression splices field surveys with suppliers and users concessionaries and also suggest some procedures and inspections routines to improve system reliability. The results of laboratory splice tests helped the failure analysis and frequently failure causes on competitive environment. Finally it is presented emerging technologies with failure reduction possibilities for the electricity transmission systems and good practices recommendations for sector
Doutorado
Recursos Hidricos, Energeticos e Ambientais
Doutor em Engenharia Civil
Ruiz, Gomez Lina Maria. "Intégration de la production éolienne aux réseaux électriques : approches techniques et économiques." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT089/document.
Повний текст джерелаThe development of Renewable Energy for electricity production has increased due to theEuropean policies and directives to prevent climate change. This political context is promoting amassive insertion of intermittent wind electricity production into electrical networks. There are stilldoubts about the limitations of integrating wind power into the electrical networks. For this reason,we focus on the study technical and economic aspects to approach these limitations. The firstpurpose of this research is to determine the effectiveness of the economical incentives policies inorder to stimulate growth in the wind power production. The second one is to evaluate the technicalproblems in the short and long term caused by the intermittency of wind power. In the short-term,the problems of power systems as well as the adjustments in the electricity market are discussed. Inthe long term, the impact of wind power reliability (in the network) is evaluated by using an algorithmto calculate the capacity credit of wind power
Hajimiragha, Amirhossein. "Sustainable Convergence of Electricity and Transport Sectors in the Context of Integrated Energy Systems." Thesis, 2010. http://hdl.handle.net/10012/5153.
Повний текст джерелаBalibani, Siva Kumar. "Small Signal Stability Analysis of a Power System with a Grid Connected Wind Powered Permanent Magnet Synchronous Generator (PMSG)." Thesis, 2015. http://etd.iisc.ernet.in/2005/3835.
Повний текст джерелаLee, Chulhan. "Energy efficient transmission in wireless communication networks." 2008. http://hdl.handle.net/2152/17927.
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Ramasubbu, Priya. "Sensors and neural networks to supervise integrated renewable energy systems (IRES)." 2008. http://digital.library.okstate.edu/etd/Ramasubbu_okstate_0664M_10069.pdf.
Повний текст джерелаSankar, Lalitha. "Relay cooperation in multiaccess networks." 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.16762.
Повний текст джерелаMorais, Rodrigo Gonçalves de. "CONGRATS - Convolutional Networks in GPU-based Reliability Assessment of Transmission Systems." Master's thesis, 2021. https://hdl.handle.net/10216/135306.
Повний текст джерелаMorais, Rodrigo Gonçalves de. "CONGRATS - Convolutional Networks in GPU-based Reliability Assessment of Transmission Systems." Dissertação, 2021. https://hdl.handle.net/10216/135306.
Повний текст джерела"Transmission Expansion Planning for Large Power Systems." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.18820.
Повний текст джерелаDissertation/Thesis
Ph.D. Electrical Engineering 2013
LANNA, ANDREA. "Control strategies for the integration of renewable energy sources in distribution and transmission networks." Doctoral thesis, 2016. http://hdl.handle.net/11573/875275.
Повний текст джерелаThis PhD thesis presents an innovative control strategy for the integration of renewable energy sources in distribution and transmission networks. This work is based on a multilevel control approach that takes into account the current technology, state of the art and legislative limits and considering the most promising trends. The outer loop control is based on a real time strategy for optimal power flow in presence of storage devices and wind turbine driven by Doubly Fed Induction Generators. These elements work in cooperation defining a dy- namic bus where the generated power is subject to temporal constraints, which establish a coupling between traditional power flow problems related to consecutive time periods; further the uncertainty in wind power genera- tion forecasts requires a continuous update of the planned power profiles, in order to guarantee a dynamic equilibrium among demand and supply. Model predictive control is used for this purpose, considering the dynamic equations of the storage and the wind turbine rotor as prediction models. A proper target function is introduced in order to find a trade-off between the need of minimizing generation costs and the excursions of the storage state of charge and the wind turbine angular speed from reference states. In the case study under consideration storage, wind turbines and a traditional synchronous generator are operated by the Transmission System Operator in the form of a Virtual Power Plant to cover network losses. The inner loop control is based on a real time control strategy for dy- namically balancing electric demand and supply at local level, in a scenario characterized by a HV/MV substation with the presence of renewable energy sources in the form of photovoltaic generators and an electric energy storage system. The substation is connected to the grid and is powered by an equiv- alent traditional power plant playing the role of the bulk power system. A model predictive control approach is proposed to decide in time the storage setpoint, based on the storage state of charge, the forecast demand and the forecast output of renewable plants. The two loops allow to obtain an overall control system able to minimize the generation of traditional power systems during the day-ahead market in an hand, and to respect the local load forecasts in other hand thanks the introduction of non-dispatchable renewable energy system and the energy storage ones as well as an innovative predictive control strategy. Theoretical results are reported on the stability of the proposed control scheme, which is then validated also on a simulation basis. Simulations show the effectiveness of the proposed approach in managing fluctuations of network demand and renewable generation under realistic conditions.
Kadrolkar, Abhijit. "Energy Aware Signal Processing and Transmission for System Condition Monitoring." 2010. https://scholarworks.umass.edu/theses/457.
Повний текст джерелаLiu, Ke. "Peak-to-average power ratio reduction in WCDMA systems and cooperative group transmission in sensor networks." 2007. https://scholarworks.umass.edu/dissertations/AAI3289256.
Повний текст джерелаLiu, Hongbo. "Cross-layer design for reliable and efficient data transmission over multiple antenna mobile infostation networks." 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17151.
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