Дисертації з теми "Virtual Power System"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Virtual Power System".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Li, Qiong. "Developing Modeling and Simulation Methodology for Virtual Prototype Power Supply System." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/27462.
Повний текст джерелаPh. D.
Fu, Hao. "Market-oriented micro virtual power prosumers operations in distribution system operator framework." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7516/.
Повний текст джерелаEdwall, Bill. "Virtual Power Plant Optimization Utilizing the FCR-N Market : A revenue maximization modelling study based on building components and a Battery Energy Storage System. Based on values from Sweden's first virtual power plant, Väla." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279520.
Повний текст джерелаDå förnyelsebara energiresurser antas omfatta en större roll av den svenska elproduktionen inom kommande år, så kan detta leda till att frekvensfluktueringar i elnätet ökar. Detta sker på grund av att den oregelbundna elproduktionen från förnyelsebara energiresurser inte matchas med konsumtion. Om dessa fluktueringar inte hanteras kan det i sin tur leda till skadliga störningar inom elnätet. För att motverka detta och således stabilisera elnätet används diverse lösningar. Ett sätt att åstadkomma ökad stabilisering i elnätet är att låta privata aktörer kraftreglera. De privata aktörerna som står för kraftregleringen gör detta i utbyte mot ekonomisk kompensation, genom att delta i reservmarknader. Den reservmarknad som studerades inom detta examensarbete kallas Frequency Containment Reserve – Normal (FCR-N). I nuläget står vattenkraft för nästan all reglerad kraft inom den här marknaden. Men då behovet av kraftreglering antas öka inom kommande år så behövs nya teknologier studeras som kan bistå med kraftregleringen. Den studerade teknologin inom detta examensarbete var ett virtuellt kraftverk. Då inga virtuella kraftverk var i bruk i Sverige då denna uppsats skrevs fanns det osäkerheter kring hur man optimalt styr ett virtuellt kraftverk och de ekonomiska fördelarna som detta skulle kunna leda till. Detta examensarbete modellerade och optimerade ett virtuellt kraftverk ur ett vinstperspektiv. Det virtuella kraftverket var uppbyggt utav kylmaskiner, ljus, ventilationsfläktar och ett batterisystem. Deras kraftkonsumtion styrdes på ett sådant sätt som lätt de bidra till kraftreglering på reservmarknaden. För att kunna analysera de ekonomiska resultaten från det optimerade virtuella kraftverket, så byggdes en jämförelsemodell. Denna jämförelsemodell är baserad på en semistatisk linjär modell, vilket är det som examensarbetets industripartner Siemens använder. Den ekonomiska jämförelsens resultat påvisade att inkomsten från den optimerade modellen var minst 85% högre än den semistatiskt linjära modellen, inom de studerade scenarierna. Denna inkomstökning skulle potentiellt kunna öka användningen av virtuella kraftverk på den svenska reservmarknaden vilket i sin tur skulle medföra högre stabilitet på elnätet. Genom att öka stabiliteten på elnätet kan således förnyelsebara energiresurser i sin tur lättare implementeras.
Liu, Xiao. "Power control of single-stage PV inverter for distribution system volt-var optimization." UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/36.
Повний текст джерелаGold, Brian. "Balancing Performance, Area, and Power in an On-Chip Network." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34137.
Повний текст джерелаMaster of Science
Zou, Ming. "Industrial Decision Support System with Assistance of 3D Game Engine." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2082.
Повний текст джерела+46 7695 23408
Anzalchi, Arash. "Advanced Solutions for Renewable Energy Integration into the Grid Addressing Intermittencies, Harmonics and Inertial Response." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3506.
Повний текст джерелаBernardinello, Martina. "Optimization of a high performance engine GDI Wet System and its control via virtual analysis and experimental tests." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24587/.
Повний текст джерелаSmugala, Ondrej. "Řízení a monitoring decentralizovaných zdrojů energie a akumulačních zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377033.
Повний текст джерелаDarle, Maria, and Saga Lindqvist. "Identification of AdvantagesConnected to Aggregation of SeveralBattery Energy Storage Systems." Thesis, Uppsala universitet, Elektricitetslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448432.
Повний текст джерелаGOMES, JUNIOR Daniel Lima. "Visualização de sistemas de potência com dados georreferenciados." Universidade Federal do Maranhão, 2010. http://tedebc.ufma.br:8080/jspui/handle/tede/1812.
Повний текст джерелаMade available in DSpace on 2017-08-14T17:46:24Z (GMT). No. of bitstreams: 1 DanielGomesJunior.pdf: 2504797 bytes, checksum: 884299d9ce4456c07e4e57e87a6a36d9 (MD5) Previous issue date: 2010-07-15
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
This paper presents a study about the electric power systems visualization presenting as results: the implementation of the main visualization techniques used in the operation and control of these systems; a new representation of electrical magnitudes with the use of Thiessen polygons; and finally, the presentation of a new paradigm in information management and manipulation of the power system graphics in a three-dimensional environment. Moreover, it presents the architecture used in the construction of this threedimensional viewing environment, which in our work, enabled the creation of a virtual control room where operators can build and add to the virtual environment the wanted and available visualization in the management of the electric system, enabling the analysis of the problem from several di erent aspects.
Este trabalho apresenta um estudo sobre visualização de sistemas elétricos de potência e tem como resultados: a implementação das principais técnicas de visualização utilizadas no controle e operação destes sistemas; uma nova representação de grandezas elétricas com a utilização dos polígonos de Thiessen; e por fim, a apresentação de um novo paradigma no gerenciamento das informações e manipulação dos gréficos dos sistemas de potência em um ambiente tridimensional. Ademais, apresenta-se a arquitetura utilizada na construção deste ambiente de visualização tridimensional que, em nosso trabalho, possibilitou a criação de uma sala virtual de controle, na qual os operadores podem construir e adicionar ao ambiente virtual as visualizações desejadas e disponíveis no gerenciamento do sistema elétrico, possibilitando a análise do problema sob vários aspectos diferentes.
Pereira, Alison Willian. "Fully-automated load-pull system based on mechanical tuners." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17027.
Повний текст джерелаPor razões de potência, linearidade e e ciência o ampli cador é um componente limitador de performance em qualquer tipo de aplicações relacionadas com estações base de voz e dados, motivando a indústria das telecomunica ções a investir em sistemas capazes de ajudar o projetista de Ampli cador de Potência (AP) a obter o máximo deste elemento ativo. O sistema de 'load-pull' é uma ferramenta essencial para auxiliar o projeto de ampli cadores de potência, permitindo determinar as condições ideais de impedância que maximizam a sua performance. Esta dissertação insere-se na área de caracterização e projeto de AP, em rádio frequência e visa a concepção, implementação e validação de um sitema automático de 'load-pull' passivo. Neste trabalho, realizou-se um estudo sobre os mais diversos tipos de sistemas de 'load-pull' utilizados na caracterização de transistores de alta potência. De modo a cumprir a nalidade desta dissertação, construí-se um sistema passivo automatizado de 'load-pull' capaz de lidar com potência 250W forma de onda contínua (CW) e 2.5 kWde potência de pico em relação a envolvente de modulação (PEP), onde a repetibilidade da malha de saída deste sistema é -60dB a uma frequência correspondente de 1.8GHz, garantindo uma boa precisão das impedâncias apresentadas ao transístor de microondas.
Due to power, linearity and e ciency reasons the PA is the performance limiting component in any state-of-the-art mobile voice and data base station, motivating the telecommunications industry to invest in systems capable of helping the designer of PA to get the most of the active devices. The load-pull system is an essential tool to assist the design of PA, allowing to determine the optimum matching conditions that maximizes the PA performance parameters. This dissertation ts in the area of radio frequency characterization and PA design, aiming the artful conception, implementation and validation of an automated passive load-pull system. In this work a study was also performed on the most diverse types of load-pull systems that are used in the characterization of high power transistors. In order to ful ll the purpose of this dissertation, an automated load-pull system was built, being capable to handle 250W of power in continuous wave (CW) and 2.5kW in peak-to-envelope (PEP), where the system repeatability of its output network is -60dB at a frequency of 1.8GHz, granting a good accuracy of impedances presented to the microwave transistor.
Cabala, Ľuboš. "Spolupráce mikro zdrojů v rámci malé smart grid." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220153.
Повний текст джерелаTai, Sio Un. "Power quality study in Macau and virtual power analyzer." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586277.
Повний текст джерелаDong, Xuzhu. "Study of Power Transformer Abnormalities and IT Applications in Power Systems." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26034.
Повний текст джерелаPh. D.
Sen, Ramen. "A framework for the development of generic virtual reality systems." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327650.
Повний текст джерелаKusic, Dara Kandasamy Nagarajan. "Combined power and performance management of virtualized computing environments using limited lookahead control /." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2999.
Повний текст джерелаEvans, Paul Leonard. "Fast multidisciplinary analysis and virtual prototyping of multi-chip power module based systems." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555336.
Повний текст джерелаMUSIO, MAURA. "Management and modelling of battery storage systems in microGrids and virtual power plants." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266749.
Повний текст джерелаRakhshani, Elyas. "Analysis and control of multi–area HVDC interconnected power systems by using virtual inertia." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/404614.
Повний текст джерелаEl concepto de inercia virtual se está convirtiendo en una parte imprescindible de los sistemas de energía modernos y en la actualidad hay diferentes líneas de investigación orientadas a estudiar diferentes métodos de emulación de inercia virtual en diferentes partes del sistema.Esta tesis doctoral se centra en el modelado, análisis y aplicación del concepto de inercia virtual en el control de frecuencia y en el control automático de generación (AGC), los cuales son elementos clave en el control de alto nivel de los sistemas eléctricos interconectados AC / DC.Dada la evolución tanto en las topologías, como en las prestaciones de control de los convertidores electrónicos de potencia, los enlaces HVDC y el control a alto nivel de los dispositivos implicados para emular inercia constituirán el foco principal de esta tesis doctoral.El AGC es un mecanismo muy útil en un sistema de potencia multi-zona durante, sobre todo cuando hay variaciones en la carga o en la generación, ya que puede facilitar diversas tareas como: la restauración de frecuencia, control de potencia de líneas de enlace entre las áreas y el despacho económico de los sistemas de generación. En este contexto en AGC, dada su condición de control a alto nivel, generará las consignas para todos los elementos locales, tales como generadores o estaciones de conversión de energía, que están bajo el control de sus controladores locales.En esta tesis se proponen dos métodos diferentes para emular inercia virtual, los cuales se introducirán, se modelarán y se aplicarán al control de sistemas de potencia AC / DC interconectados. El primer método, que es uno de los métodos más comunes para la emulación de inercia en otras aplicaciones, es la técnica del control derivativo. En esta tesis, esta técnica se utiliza para llevar a cabo la emulación de inercia a alto nivel. Éste método de emulación de inercia se ha desarrollado para un sistema AGC de dos área que está interconectado mediante líneas de transmisión de CA / CC en paralelo. Sobre la base de la técnica propuesta, el efecto dinámico de la inercia emulada sobre el control de frecuencia y potencia activa será formulado y evaluado. Los efectos del retardo mediciones de frecuencia y los efectos del bucle de sincronización (PLL) también se consideran en el análisis y posterior ensayo. Las simulaciones llevadas a cabo demostrarán cómo la emulación de inercia virtual puede mejorar efectivamente el rendimiento del sistema de potencia.Dado que el primer método se basa en la derivación de la frecuencia de red, la medición de la frecuencia es muy importante y la aplicación de los métodos de medida de la misma, como las PLL, conlleva algunas limitaciones en la aplicación y respuesta del mismo. Por lo tanto, como una solución definitiva, se introduce el segundo método para la emulación de inercia virtual en esta tesis. El segundo método se basa en el concepto de energía síncrona virtual (VSP). El concepto de VSP, el cual permite simular los efectos dinámicos de las emulaciones de inercia por enlaces HVDC, se presentará y aplicará en sistemas de control de alto nivel, aplicándolo finalmente en el modelo AGC multi-zona. Tal y como se demostrará, mediante el uso de esta combinación propuesta en el modelo de AGC, el comportamiento dinámico de los sistemas muestra una mejora significativa. El control de bucle de potencia activa en el enlace HVDC basado en el VSP tiene una característica de segundo orden que genera una respuesta instantánea y permite controlar la amortiguación y la inercia en el sistema. La eficacia de concepto propuesto en las mejoras dinámicas se probará en plataformas de simulación que representarán un sistema multi-zona. Por último, se demostrará que la inercia virtual añade un grado de libertad adicional a la dinámica del sistema, lo cual ayuda a controlar el sobre pico así como el amortiguamiento en los transitorios en los enlaces HVDC.
Moreira, Alexandre Candido 1981. "Uso de instrumentação virtual para a analise da qualidade da energia eletrica." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259913.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e Computação
Made available in DSpace on 2018-08-07T06:01:54Z (GMT). No. of bitstreams: 1 Moreira_AlexandreCandido_M.pdf: 4879981 bytes, checksum: 6aa206d50e7569915efea8d3f32bd2c3 (MD5) Previous issue date: 2006
Resumo: O presente trabalho avalia a possibilidade da aplicação de instrumentação virtual para a análise de problemas da qualidade da energia elétrica (QEE). Aproveitando-se da grande flexibilidade, elevada capacidade de processamento e da facilidade de reconfiguração oferecida por tal tipo de instrumento, são desenvolvidos algoritmos para medição digital e análise de grandezas elétricas. No modo de medição, é feita uma análise comparativa entre os dois principais métodos apresentados na literatura, para o cálculo de potência e fator de potência em sistemas trifásicos com condutor de retorno (neutro). Para comparar esses métodos, foram implementadas sub-rotinas para identificação das componentes fundamentais, de seqüência positiva das tensões e correntes, potências ativa e não-ativa, além de algoritmos para calcular o fator de desequilíbrio da componente fundamental e o nível de distorção harmônica total. No modo de análise, foi implementado um algoritmo que realiza uma varredura nos indicadores de QEE, calculados de minuto em minuto e salvos em arquivos, através do instrumento de medição para uma análise estatística diária (baseada na função de distribuição de amostras).Tal algoritmo permite identificar os principais distúrbios que ocorrem em determinada instalação como também permite avaliar a duração das violações dos limites pré-fixados
Abstract: This work explores the possibility of applying virtual instrumentation to analyze power quality problems. Based on the great flexibility, increased processing capacity and the possibility of reconfiguration, offered by such type of instrumentation, several digital algorithms have been developed for digital measurement and analysis of electrical quantities. In the case of measurement mode, a comparison is made between the two main methods reported in the literature concerning power and power factor calculation in three-phase systems with return conductor (neutral). To compare those methods, sub-routines have been implemented to identify the fundamental components, positive sequence of voltages and currents, active and non-active powers, as well as to calculate the unbalanced factor of the fundamental component and the total harmonic distortion. In the case of analysis mode, an algorithm was implemented that realizes a sweeping of the power quality indices, obtained minute by minute, and automatically stored in files by the instrument, for daily statistical analysis (based on distribution function). Such algorithm helps to identify the main disturbing causes in a specific installation, and permits to evaluate the violation time of the prescribed limits
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica
Silva, Carlos Henrique de Castro. "Desenvolvimento de um LaboratÃrio Virtual para capacitaÃÃo TecnolÃgica a DistÃncia em ProteÃÃo de Sistemas ElÃtricos." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10880.
Повний текст джерелаCom o aumento na demanda de energia elÃtrica e a exigÃncia de maior confiabilidade, seguranÃa e eficiÃncia na operaÃÃo de sistemas elÃtricos de potÃncia por parte dos ÃrgÃos reguladores, aumentou a necessidade por profissionais cada vez mais qualificados em planejamento e operaÃÃo dos sistemas de potÃncia. No entanto, com a necessidade de atualizaÃÃo tÃcnica continuada e em decorrÃncia da polÃtica de racionalizaÃÃo de custos e de disponibilizaÃÃo de pessoal, as tÃcnicas de ensino a distÃncia tÃm evoluÃdo e alcanÃado abrangÃncia nas mais diferentes Ãreas do conhecimento. Este trabalho apresenta um Simulador para Treinamento Presencial e a DistÃncia em OperaÃÃo e ProteÃÃo de Sistemas ElÃtricos (STOP). O simulador STOP à desenvolvido em Java, podendo ser utilizado em ambientes: Unix, Linux, Windows, MacOS. O STOP pode ser aplicado em treinamento presencial e a distÃncia e està voltado à capacitaÃÃo de estudantes de engenharia, tÃcnicos e profissionais da Ãrea de sistemas elÃtricos de potÃncia. O STOP està integrado a um Ambiente Virtual de Aprendizagem (AVA), o Moodle. A integraÃÃo enriquece o ensino-aprendizado tornando-o mais efetivo com o uso de uma ferramenta capaz de simular situaÃÃes reais. Os simuladores em ambientes virtuais sÃo alternativas para a reduÃÃo de custos em empresas e instituiÃÃes de ensino. O simulador STOP à um software composto de diagramas unifilares, com a representaÃÃo dos principais componentes do sistema de proteÃÃo, tornando possÃvel ao usuÃrio simular faltas e reconfigurar o sistema elÃtrico, por meio de ajustes de relÃs para coordenaÃÃo da proteÃÃo e redefiniÃÃo de parÃmetros.
As the demand for electrical energy increases and requirements from regulatory agencies for improved reliability, security and efficiency on the operation of electric power systems, the need for professionals ever more qualified on planning and operation power systems also increases. However, with the need for continued technical update and as a result of rationalization policies of costs and provision of personnel for training, the distance learning techniques have evolved and reached different areas of knowledge. This work presents a Simulator for Presence and Distance Learning about Operation and Protection of Electric Systems (STOP). The STOP Simulator is developed in Java, which enables it to be used in the following systems: Unix, Linux, Windows, MacOS. The STOP can be applied in class as well as distance training and is directed to the training of engineering students, technicians and professionals specialized on electric power systems. The STOP is integrated to a Learning Virtual Environment (AVA), the Moodle. The integration enhances the teaching-learning process making it more effective by using a tool able to simulate real life situations. Simulators in virtual environments are an alternative to reducing costs in companies and educational institutions. The STOP is a software tool featuring one-line diagrams with the main components of the protection system, short-circuits simulation and reconfiguration of the system by setting relays for coordination of the system protection and redefinition of parameters.
Paquette, Andrew Donald. "Power quality and inverter-generator interactions in microgrids." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51803.
Повний текст джерелаCvetkovic, Igor. "Modeling and Control of Voltage-Controlling Converters for Enhanced Operation of Multi-Source Power Systems." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/85850.
Повний текст джерелаPh. D.
Perez, Filipe. "Control of AC/DC Microgrids with Renewables in the Context of Smart Grids : Including Ancillary Services and Electric Mobility." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG011.
Повний текст джерелаMicrogrids are a very good solution for current problems raised by the constant growth of load demand and high penetration of renewable energy sources, that results in grid modernization through “Smart-Grids” concept. The impact of distributed energy sources based on power electronics is an important concern for power systems, where natural frequency regulation for the system is hindered because of inertia reduction. In this context, Direct Current (DC) grids are considered a relevant solution, since the DC nature of power electronic devices bring technological and economical advantages compared to Alternative Current (AC). The thesis proposes the design and control of a hybrid AC/DC Microgrid to integrate different renewable sources, including solar power and braking energy recovery from trains, to energy storage systems as batteries and supercapacitors and to loads like electric vehicles or another grids (either AC or DC), for reliable operation and stability. The stabilization of the Microgrid buses’ voltages and the provision of ancillary services is assured by the proposed control strategy, where a rigorous stability study is made. A low-level distributed nonlinear controller, based on “System-of-Systems” approach is developed for proper operation of the whole Microgrid. A supercapacitor is applied to deal with transients, balancing the DC bus of the Microgrid and absorbing the energy injected by intermittent and possibly strong energy sources as energy recovery from the braking of trains and subways, while the battery realizes the power flow in long term. Dynamical feedback control based on singular perturbation analysis is developed for supercapacitor and train. A Lyapunov function is built considering the interconnected devices of the Microgrid to ensure the stability of the whole system. Simulations highlight the performance of the proposed control with parametric robustness tests and a comparison with traditional linear controller. The Virtual Synchronous Machine (VSM) approach is implemented in the Microgrid for power sharing and frequency stability improvement. An adaptive virtual inertia is proposed, then the inertia constant becomes a system’s state variable that can be designed to improve frequency stability and inertial support, where stability analysis is carried out. Therefore, the VSM is the link between DC and AC side of the Microgrid, regarding the available power in DC grid, applied for ancillary services in the AC Microgrid. Simulation results show the effectiveness of the proposed adaptive inertia, where a comparison with droop and standard control techniques is conducted
Zine, Elabidine Khouloud. "Méthode de prototypage virtuel permettant l'évaluation précoce de la consommation énergétique dans les systèmes intégrés sur puce." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066669/document.
Повний текст джерелаTechnological trends towards high-level integration combined with the increasing operating frequencies, made embedded systems design become more and more complex.The increase in number of computing resources in integrated circuit (IC) led toover-constrained systems.In fact, SoC (System on Chip) designers must reduce overall system costs, including board space, power consumption and development time.Although many researches have developed methodologies to deal with the emerging requirements of IC design, few of these focused on the power consumption constraint.While the highest accuracy is achieved at the lowest level, estimation time increases significantly when we move down to lower levels.Early power estimation is interesting since it allows to widely explore the architectural design space during the system level partitioning and to early adjust architectural design choices.EDPE estimates power consumption at the system levels and especially CABA (Cycle Accurate Bit Accurate) and TLM (Transaction Level Modelling) levels.The EDPE have been integrated into SoCLib library.The main goal of EDPE (Early Design Power Estimation) is to compare the power consumption of different design partitioning alternatives and chooses the best trade-off power/ performance.Experimental results show that EDPE (Early Design Power Estimation) method provides fast, yet accurate, early power estimation for MPSoCs (MultiprocessorSystem on Chip).EDPE uses few parameters per hardware components and is based on homogeneous and easy characterization method.EDPE is easily generalized to any virtual prototyping library
Mendon?a, Luciano Pessoa. "Impactos da ado??o de sistemas de informa??o no judici?rio: pesquisa com usu?rios do sistema processual virtual em um juizado especial federal." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12094.
Повний текст джерелаThe Information Technology (IT) is increasing his applicability to business, both private and public companies. It is necessary the adequate use of the new technologies and get cooperation and technology acceptance of the system. People tend to resist to the changes, contributing so that the technology is rejected or even it is not recognized as promoting of the changes. This study is relevant and aim to evaluate the impacts of new technologies, considering their users as fundamental factors in the change process. The survey analyzed the advantages and the barriers of the system use in three federal special judicial of Rio Grande do Norte, with data collected in May of 2007, through the application of questionnaires to thirty eight users of the virtual system CRETA. The users' perception was evaluated, under the optics of five variables: efficiency, image, agility, ease of use and quality. Starting from the obtained results, it was evidenced that the implementation of the system felt accordingly the expected and it reached the objectives intended that were: the velocity and efficiency in the path of the lawsuits, larger productivity, resulting in a better quality of the final work introduced to the citizen and proportionate an improvement in the organizational image of the judiciary power
A Tecnologia da Informa??o (TI), frente aos constantes avan?os tecnol?gicos e sua aplicabilidade ?s t?cnicas de gest?o, se apresenta como uma grande aliada na busca pelo sucesso organizacional, tanto no ?mbito das empresas privadas quanto p?blicas. Uma das estrat?gias diferenciadoras utilizadas pelas organiza??es prov?m de usos inovadores de tecnologias, com ?nfase em TI. No entanto, ? necess?rio avaliar a percep??o dos usu?rios quanto aos impactos do uso das novas tecnologias. Por mais avan?ada que seja a tecnologia implantada, poder? haver resist?ncia das pessoas ?s mudan?as, contribuindo para que a tecnologia n?o seja plenamente aceita ou mesmo n?o seja reconhecida como fomentadora de mudan?as. Justifica-se, assim, a relev?ncia de estudos que busquem avaliar os impactos de novas tecnologias, considerando os seus usu?rios como fatores fundamentais no processo de mudan?a. Partindo desse princ?pio, esse estudo analisou os impactos, as vantagens e as limita??es da implanta??o de um sistema virtual de controle processual, denominado CRETA, no Juizado Especial Federal do Rio Grande do Norte. Por meio da aplica??o de question?rios a 38 usu?rios, foi avaliada a percep??o dos impactos do uso do CRETA sob a ?tica de cinco vari?veis: efici?ncia/produtividade, imagem, agilidade, facilidade e qualidade. A partir dos resultados obtidos, foi evidenciado que a implementa??o do sistema se deu conforme o esperado e atingiu os objetivos pretendidos, tais como celeridade e efici?ncia no tr?mite dos processos judiciais, maior produtividade, resultando numa melhor qualidade do trabalho final apresentado ao cidad?o e proporcionado uma melhora na imagem organizacional do poder judici?rio. No entanto, alguns impactos negativos foram destacados, principalmente ligados aos fatores humanos
Paniah, Crédo. "Approche multi-agents pour la gestion des fermes éoliennes offshore." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112067/document.
Повний текст джерелаRenewable Energy Sources (RES) has grown remarkably in last few decades. Compared to conventional energy sources, renewable generation is more available, sustainable and environment-friendly - for example, there is no greenhouse gases emission during the energy generation. However, while electrical network stability requires production and consumption equality and the electricity market constrains producers to contract future production a priori and respect their furniture commitments or pay substantial penalties, RES are mainly uncontrollable and their behavior is difficult to forecast accurately. De facto, they jeopardize the stability of the physical network and renewable producers competitiveness in the market. The Winpower project aims to design realistic, robust and stable control strategies for offshore networks connecting to the main electricity system renewable sources and controllable storage devices owned by different autonomous actors. Each actor must embed its own local physical device control strategy but a global network management mechanism, jointly decided between connected actors, should be designed as well.We assume a market participation of the actors as an unique entity (the coalition of actors connected by the Winpower network) allowing the coalition to facilitate the network management through resources aggregation, renewable producers to take advantage of controllable sources flexibility to handle market penalties risks, as well as storage devices owners to leverage their resources on the market and/or with the management of renewable imbalances. This work tackles the market participation of the coalition as a Cooperative Virtual Power Plant. For this purpose, we describe a multi-agent architecture trough the definition of intelligent agents managing and operating actors resources and the description of these agents interactions; it allows the alliance of local constraints and objectives and the global network management objective.We formalize the aggregation and planning of resources utilization as a Markov Decision Process (MDP), a formal model suited for sequential decision making in uncertain environments. Its aim is to define the sequence of actions which maximize expected actual incomes of the market participation, while decisions over controllable resources have uncertain outcomes. However, market participation decision is prior to the actual operation when renewable generation still is uncertain. Thus, the Markov Decision Process is intractable as its state in each decision time-slot is not fully observable. To solve such a Partially Observable MDP (POMDP), we decompose it into a classical MDP and an information state (a probability distribution over renewable generation errors). The Information State MDP (IS-MDP) obtained is solved with an adaptation of the Backwards Induction, a classical MDP resolution algorithm.Then, we describe a common simulation framework to compare our proposed methodology to some other strategies, including the state of the art in renewable generation market participation. Simulations results validate the resources aggregation strategy and confirm that cooperation is beneficial to renewable producers and storage devices owners when they participate in electricity market. The proposed architecture is designed to allow the distribution of the decision making between the coalition’s actors, through the implementation of a suitable coordination mechanism. We propose some distribution methodologies, to this end
Rezgui, Abir. "Interopérabilité de modèles dans le cycle de conception des systèmes électromagnétiques via des supports complémentaires : VHDL-AMS et composants logiciels ICAr." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00858315.
Повний текст джерелаGOMES, JÚNIOR Daniel Lima. "Metodologia para construção de aplicações de rv e ra com marcadores naturais em cenários industriais." Universidade Federal do Maranhão, 2017. https://tedebc.ufma.br/jspui/handle/tede/tede/2011.
Повний текст джерелаMade available in DSpace on 2017-11-23T14:52:48Z (GMT). No. of bitstreams: 1 DanielGomesJúnior.pdf: 8247020 bytes, checksum: ccc1a51b78a0a368f50ca5393fa8d97c (MD5) Previous issue date: 2017-08-25
This research proposes a methodology for development of Virttual Reality (VR) and Augmented Reality (AR) aplications, using natural markers for industrial scenarios. The proposed methodology uses the object annotation concept and visualization proposals are presented both for development of VR as for AR environments. In VR environments, the methodology is applied for object detection step of the semi-automatic environment development. On the other hand, in AR environments, is presented the concept of georreferenced natural markers, which use the georreferenced data integrated with object detection process using image processing techniques. The energy substations scenarios were used as case study for both approaches. Architectures are presented for construction and data visualization in industrial environments. Both for VR as for AR approaches, this work proposes using 3D natural markers based in Haar-like features for object training and detection process. The results enable the equipment detection at different points of view, within the operating scenario. Besides that, in AR, it enables the pose estimation in real-time using ORB features, while in VR it enables the semi-automatic object detection, which are used as information points for inclusion of virtual information. Several industrial scenarios, and especially the energy sector, has a high degree of complexity in the information processing and visualization. In this sense, beyond the 3D natural markers methodology, this work presents new visualization applications for industrial scenario visualization in VR and AR approaches.
Esta pesquisa propõe uma metodologia para construção de aplicações de Realidade Virtual (RV) e Realidade Aumentada (RA) com uso de marcadores naturais em cenários industriais. A metodologia usa o conceito de anotação de objetos e são apresentadas propostas de visualização para ambientes industriais tanto em formato de RV quanto de RA. Nos ambientes de RV, a metodologia é aplicada através da detecção de objetos no processo de construção semiautomática dos ambientes. Por outro lado, nos ambientes de RA, apresenta-se o conceito de marcadores naturais georreferenciados, que associam dados georreferenciados ao processo de detecção de objetos com técnicas de processamento de imagens. O cenário de subestações de energia elétrica foi utilizado como estudo de caso para as duas abordagens. São apresentadas arquiteturas para construção e visualização de dados em ambientes industriais. Tanto sob a forma de RV quanto de RA, este trabalho propõe o uso de marcadores naturais 3D baseados em Haar-like features para o processo de treinamento e detecção de objetos. Os resultados permitem a detecção de equipamentos a partir de diferentes pontos de vista no cenário de operação. Além disso, em RA, esta abordagem permite a estimativa de pose em tempo real com uso de ORB features e permite, em RV, a detecção semiautomática de objetos que são utilizados como pontos de informação para adição de informações virtuais. Diversos cenários industriais, principalmente o setor elétrico, possuem grau elevado de complexidade no tratamento e visualização das informações. Nesse sentido, além da metodologia de marcadores naturais 3D, este trabalho apresenta novas aplicações de visualização no cenário industrial com abordagens em RV e RA.
Hägg, Martin. "Theoretical analysis and simulation of microwave-generation from a coaxial vircator." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316595.
Повний текст джерелаSastry, Jyoti. "Direct AC control of grid assets." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41109.
Повний текст джерелаHernández, Tannia Karina Vindel. "Uma proposta de integração da geração distribuída, por meio das usinas virtuais, ao sistema elétrico do Estado de São Paulo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/106/106131/tde-21052015-164508/.
Повний текст джерелаThis Thesis presents contributions for the planning of the electrical system of São Paulo State Brazil, emphasizing benefits obtained with a better integration of renewables (mainly solar photovoltaics, wind energy, from municipal solid waste and sugarcane vinasse) aiming energy security and independence, loss reduction and environmental benefits. For this, the concept of VPP Virtual Power Plant is introduced, in which a better and broader use of energetic resources, geographically dispersed, including distributed microgeneration, autoproduction, cogeneration, and even nonrenewable sources, is facilitated. Those disperse energy resources, in general located near the consumer, are grouped and jointly managed, in order of to satisfy the demand requirements, using Smart Grid and Information and Telecommunication Technologies, and making the VPP to act, for the transmission or distribution system point of view, as a conventional large electrical power plant. An analysis and forecasts of the operation of the Brazilian Southeast/Center West (SE/CO) subsystem, with special focus on São Paulo State electrical system, and its interactions with the Brazilian Interconnected Electrical System (SIN), is presented.
Федорчук, Станіслав Олегович. "Забезпечення заявлених графіків генерації відновлюваних джерел енергії на основі концепції віртуальних електричних станцій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42334.
Повний текст джерелаDissertation for the degree of candidate of technical sciences (doctor of philosophy) in specialty 05.14.02 - Electric power stations, networks and systems (141 - Power engineering, electrical engineering and electromechanics). – National Technical University "Kharkiv Polytechnic Institute", Ministry of Education and Science of Ukraine, Kharkiv, 2019. Annotation content. The dissertation is devoted to solving the actual scientific and applied problem in the providing the stated schedules of power generation at renewable energy sources (RES) through the use of storage systems and the concept of virtual power plants. According to the legislation of Ukraine, the Guaranteed Buyer must purchase all energy from renewable energy producers operating under the Green Tariff. The peculiarity of the operating modes of power plants on renewable sources is almost a direct dependence on weather conditions, which leads to deviations of the power value at the points of generation from the declared values. Therefore, there is a need to compensate for emerging imbalances. Using the concept of virtual power plants that combine RES, active consumers and storage systems into a single station with a common control system, it is possible to reduce imbalances at the generation point. This requires the creation of methods for selecting the optimal layout of the accumulation systems; control systems algorithms for virtual power plants and distributed storage systems; recommendations for their application to power grids that are just beginning to transition from traditional to intelligent and have a lack of maneuverability. The development of technical measures to ensure the declared schedules of solar power plants (SPP) and wind power plants (WPP) will allow them to be integrated into the generation schedule as base stations. This will make it possible to fulfill the obligations of all participants of the process and not violate the planned operating modes of other stations. The purpose and tasks of the study. The purpose of the study is to provide the stated schedules of power generation at the generation site of renewable energy sources through the use of storage systems and the concept of virtual power plants. To achieve the goal, the research objectives are defined: – to analyze the basic methods and means of providing the schedules of power outputs of renewable energy sources in Ukraine and the world and the factors that influence them; – to develop a mathematical model for the study of operating modes of hybrid power plants based on solar and wind power plants and to check the adequacy of the developed mathematical model; – clarify the methodology for calculating the cost of electricity from storage systems at the generation site, taking into account losses in energy transmission and conversion; – improve the method of optimization of the configuration of accumulation systems for balancing the generation of SES and WPP, while minimizing the specific cost of electricity; – carry out computer simulation of the operation of renewable energy power plants based on the weather data of the selected administrative district of Ukraine in order to determine the required configuration of the accumulation system based on the developed methodology; – to develop a computer model of a virtual power plant that combines advanced mathematical models of SES and WPP power generation, computer models of energy storage systems, imitation of active consumers and the energy market, as well as elements of hardware and computer modeling. – to develop an algorithm of operation of the information and control system of the virtual power plant, based on the specified method of calculating the cost of electricity, and to test it on a computer model of the virtual power plant. – explore the possibility of applying the concept of virtual power plants to provide daily generation schedules, taking into account the requirements of the Guaranteed Buyer. The object of research is the electromagnetic processes in grids with power plants based on renewable energy sources. Subject of research – electrical and information parameters of modes of equipment of power plants on renewable energy sources. Scientific novelty: 1) The mathematical model of the virtual power plant has been further developed, which differs from the existing ones by adding elements for communication with the real programmable logic controller OVEN 110-60 and based on the regression analysis the additional coefficient of the ratio of incoming weather conditions and the resulting power is taken into account the real characteristics of the equipment, which allowed to apply hardware and software modeling, to increase the accuracy of the calculation of the output active power of solar panels at 5% and conduct simulations of wind power station at wind speeds greater than nominal. 2) The method of calculating the cost of electricity, which is used to provide daily schedules of generation of RES on the basis of accumulation within one virtual power station, which differs from the known costs related to the location, installation and operation of additional equipment, which improves the accuracy of calculations, was further developed. and to increase the energy efficiency of such systems by utilizing their most relevant elements. 3) It is scientifically and technically grounded to use the concept of virtual power plants for providing daily schedules of generation of solar and wind power plants in the conditions of the energy market of Ukraine, which will allow to ensure the functioning of the Guaranteed Buyer mechanism with minimal use of additional maneuvering capacities. Practical value: The practical value of the work lies in the fact that methods of optimization of modes of operation of power plants on renewable energy sources by means of accumulation are determined on the basis of the performed researches. This approach will allow to establish the correspondence between the current and the predicted value of power at the point of generation, to form a schedule of load for traditional power plants without the need for additional maneuvering for compensation of power plants on renewable energy sources. In addition, research findings will help to increase the accuracy of electricity cost calculations at the point of generation from storage systems. The developed method of choosing the configuration of accumulation systems allows to determine the minimum required capacity of energy storage and their capacity, which will minimize the cost of equipment. The proposed algorithm for managing a distributed accumulation system allows to solve the problem of distributed balancing, and also takes into account the possibility of involving active consumers and the energy market in the balancing process. The results of the dissertation work were introduced: - at LEO LLC to calculate the minimum required volume of energy storage systems that will be recommended to provide the stated generation schedules of power plants than work based on green tariff; - in the educational process of the National Technical University "Kharkiv Polytechnic Institute" for students of specialties 141 specialties in specialization: 141- 01 "Power Plants" and 141-05 "Energy Management and Energy Efficient Technologies" during the teaching of lectures on disciplines "Electrical part of stations and substations "," ACTSP of stations and substations "," Renewable energy systems and secondary energy resources ", during writing of diploma projects, final qualification works. The dissertation is executed according to the plans of scientific researches of the National Technical University "Kharkiv Polytechnic Institute" of the Department of Power stations and general electrical engineering in accordance with the economic agreement « Methods of improvement of power systems» (state registration number - 0116U000885).
Федорчук, Станіслав Олегович. "Забезпечення заявлених графіків генерації відновлюваних джерел енергії на основі концепції віртуальних електричних станцій". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/42333.
Повний текст джерелаDissertation for the degree of candidate of technical sciences in specialty 05.14.02 - power plants, networks and systems. - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. The thesis is devoted to the solution of the current scientific and applied problem in the field of providing the declared schedules of generating power plants with renewable energy sources based on the concept of virtual power plants. In the dissertation work, the methods of providing the declared schedules of generating power plants on renewable energy sources are investigated. The expediency of using the concept of virtual power plants to solve the problem is justified. The use of various types of accumulation systems as one of the elements of a virtual power plant is investigated. The analysis of existing methods and state-of-the-art-practices of implementing intelligent networks was carried out, which made it possible to select the Smart Grid Architecture Model pattern as the basis for creating the necessary infrastructure. The analysis of existing methods for determining the optimal capacity of accumulation systems and their layout has been carried out that was used to calculate minimal capacity for providing the declared schedules of generation of PV and wind power plant each 1 MW for one of the administrative centers of Ukraine. The developed computer model for studying the operation of virtual power plants that include PV and wind power with energy storage and connections to PLC allows assessing potential unbalances during generation, checking the sufficiency of the capacity of accumulation systems for various tasks, as well as testing the operation of the control system. The methodology for calculating the cost of electrical energy from storage systems has been refined, taking into account the cost of energy losses during transmission and transformation, as well as additional factors associated with renting and servicing. An algorithm for managing a virtual power plant was developed, implemented and tested with real PLC connected to mathematical model, based on using the cheapest energy source for balancing taking into account the limitations of electrical networks, power lines and transforming equipment, access to the energy market for buying and selling energy and the ability to attract active consumers. The possibility of providing the declared schedules of generation of power plants based on the concept of virtual power plants on the example of conditions of one of the administrative centers of Ukraine is shown.
Charles, Alexandre. "Dynamique des systèmes de solides rigides avec impacts et frottement." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4738/document.
Повний текст джерелаIn the view of robotics or granular media mechanics, we question the statement of the dynamical evolution problem for multibody systems with contacts and friction. The usual approach is event driven and does not allow to state an evolution problem in a systematic way. This matter of fact gave rise to a new approach in the frictionless case we generalize to the case with friction. Sticking to the point of view of Lagrange on the equation of the dynamics, we emphasize the systematic use of virtual powers and duality. This bias suggests to put emphasis on generalized reaction forces in the statement of the evolution problem and not on local reaction forces of the real world, as it is usual in practice. This point of view allows to escape from pathologies known as Painlevé paradox
Shiu, Hwei-Dong, and 許暉東. "Virtual Reality Application - A Simulation System for Power Machine Operation." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/81948543078100202594.
Повний текст джерела國立成功大學
機械工程學系
86
In recent years, virtual reality (VR) is sprouting as a particular computer technology, which is applied in many aspects such as engineering, science, business applications, entertainment, and so on. In this dissertation, we develop a simulation system for power machine operation which integrated digital controller, computer network and virtual reality techniques. This system consists of three main parts: an operation platform, a monitor platform and a VR platform. The operation platform provides the user the sense of presence. The monitor platform controls the signal transmission. The VR platform illustrates overall simulations that combine virtual scenes and the virtual power machine operation. A forklift operation system is built for simulation in the dissertation. The virtual forklift machine is controlled by the operation platform. By using the helmet display, the user would immerse himself in the virtual environment. Finally, we discuss incomplete parts and unsolved programs of this dissertation for the future work.
Wu, Shang-Qing, and 吳尚慶. "System Operation Support by Virtual Power Plant in Distribution Network." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/99q2tb.
Повний текст джерела國立中山大學
電機工程學系研究所
107
With the increase of power demand, rising concern of environment protection and decommission of nuclear and fossil fuel power plants, the utility companies are facing with various challenges. Renewable energy, such as solar photovoltaic, wind power in conjunction with energy storage system are integrated to the network in a rapid speed. Effective Coordination of these distributed energy resources could not only reduce the impacts to the system but also provide supports to system operations. This research uses the concept of virtual power plant to integrate the distributed resources in the distribution system to provide ancillary services to distribution system operator. Mathematical formulations of several ancillary services, including line losses optimization, congestion relief, voltage regulation and service restoration support, are presented. The dispatch of virtual power plant resources in a feeder level network during normal and emergency situations are studied and the enhancement of system efficiency and reliability due to the dispatch of the distributed energy resources is demonstrated.
Lo, Kuo-Yuan, and 羅國源. "A Low Power Multi-Node Wearable Monitoring System with Virtual Reality." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/13946424663007115187.
Повний текст джерела國立臺灣科技大學
電子工程系
105
Many diseases or accidents lead to physical disabilities, for example, stroke, sport injuries, or traffic accidents. Those whom suffered from physical disabilities may have to go to the hospital for rehabilitation to recover from sequela of diseases or injuries. However, the place for rehabilitation is limited to the hospital may leads to patient’s inconvenience, and the results of the range of motion obtained from the goniometry may diverse from different therapists. To improve the inconvenience and disadvantages above, a wearable movement monitoring system is derived in this study to monitor user’s range of motion. The system can automatically provide the information about the range of motion and allows users to conduct the physical treatment at home. Besides, four benefits also come out: the extension of multi-node to extend the monitoring for more limbs, small and light-weighted low-power wearable device to improve the portability and the endurance, a fast calibration of the sensor to increase the accuracy under different environmental conditions, and a virtual-reality based real-time application to provide feedbacks of the movement information. The results of the proposed wearable monitoring device have been compared to the optical motion capture system (Qualisys). In the motor-based experiment, a maximum mean error of 0.44°±0.161°, 0.368°±0.338°, and 0.193°±0.287° is obtained in the rotation of X-, Y-, and Z-axes, respectively. Furthermore, the power consumption of our device is about 5.44mA based on the power consumption test, which is much smaller than the commercial device x-IMU of 50mA ~ 150mA.
Jhang, Jhih-Yuan, and 張志遠. "Applications of data mining techniques to an power scheduling system for renewables-based virtual power plant." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/nckmz3.
Повний текст джерела國立東華大學
資訊工程學系
105
With the rapid development of the emerging technologies and significant cost reduction of the deployment for solar energy and wind power, the replacement of traditional power generation by renewable energy becomes feasible in the future. However, different from currently deployed centralized power sources, renewables are categorized as one kind of intermittent energy sources, and the scale of renewables is small and scattered. In the recent literature, the architecture of virtual power plant was proposed to replace the current smart grid in the future. However, the energy sharing concept and the uncertainties of intermittent energy sources will cause the short-term energy management for the future virtual power plant much more complicated than current centralized control energy management for traditional power generation system. To the best of our knowledge, no researcher has addressed on the above-mentioned short-term energy management problems for the future virtual power plant so far. Accordingly, a hierarchical day-ahead energy management system based on the architecture of virtual power plant is proposed in this work to tackle the complex energy management problems. We first collect electricity consumption data from smart appliances used in households and predict power-generating capacity of renewable energy sources at the prosumer level. Then, the proposed hierarchical energy management system is employed to schedule the usage of electricity for the customers by considering the efficiency of the use of distributed renewables. Notably, a reallocation mechanism is presented in this work to allocate excess electricity generated in a community virtual power plant to others facing with power supply shortage, and the maximal usage of renewables and reduction of the burden on community virtual power plants during time period of peak load can be achieved accordingly. The experimental results show that the hierarchical day-ahead energy management system proposed in this work can mitigate the dependency on community virtual power plants effectively, and balance peak and off-peak period load of electricity market.
Adhip, *. "Active Power Flow Tracing for Preventive Control in Deregulated Power Systems." Thesis, 2017. http://etd.iisc.ernet.in/2005/3633.
Повний текст джерелаTang, Sheng-Hsien, and 唐盛賢. "Machine Learning Based Intelligent Gateway for Collaboration System of Virtual Green Power Generation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/63v4x3.
Повний текст джерела遠東科技大學
機械工程研究所
105
In the thesis, a machine learning based intelligent gateway for the collabration system of virtual green power generation is proposed. It works for power dispatching of virtual green power plants. The intelligent gateway for the collabration system is developed by using supervising machine learning method. It can reduce the risk of power supply instability caused by poor loading distribution of green power plants. So it will effectively improve the performance of power dispatching. The intelligent gateway for the collaboration system contains: (1) Communication Module (2) Coordination Module (3) Cooperation Module (4) Shared Creation Module. Multiclass decision jungle algorithm is choosed for machine learning in the communication module and the coordination module. And supervised neural network regression algorithm is choosed for machine learning in the cooperation module and the shared creation module. These modules are integrated into the intelligent gateway for the collaboration system. Finally, the design of the intelligent gateway for the collabration system is verified by the results of simulation and implementation. The experimental results of the system showed the good performance and feasibility of power dispatching for virtual green power plants.
Hung, Kun-Hong, and 洪昆宏. "A low-cost power quality measurements system realized by virtual instruments with Arduino ADC." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/33131366834234608472.
Повний текст джерела亞洲大學
資訊工程學系
103
This thesis aims to propose a simple way to develop a low-cost and high-efficiency frequency estimation system for power signal. Arduino DAQ is utilized to extract the power signal and then perform the analysis by using a virtual-instrument software, LabVIEW. First , the analysis is performed by using Fourier algorithm as a digital filter to fetch the fundamental signal of the acquired signals, and then a zero crossing algorithm technology is applied to sine or cosine signal of the fundamental signal to calculate the frequency of the fundamental signal. The RMS algorithm is also implemented to monitor the voltage variation of the power signal so as to monitor the power quality. LabVIEW is implemented to simulat a signal source with high-order harmonics and noise signal combined together, and the program can be used to estimate the frequency of fundamental sinusoidal signals with high accuracy. Experiments show Arduino can be utilized to complete the task of the data acquisition.
Chou, Hsin-Wei, and 周芯瑋. "Virtual-Physical Integration Teaching Method─ A Case Study of Wind and Solar Hybrid Power Generating System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/apd2d4.
Повний текст джерела國立臺北教育大學
數位科技設計學系(含玩具與遊戲設計碩士班)
102
With the advanced developments recently made in all kinds of technology, teaching material has become more and more diversified. Many studies have been done on the application of virtual reality to interactive learning and it is seen as a most effective teaching technique. However, this learning only involves “watching” and “imagining” and visual stimulation can be over emphasized in a virtual reality environment. The importance of “learning by doing” or by “hands-on experience” is often neglected. This study proposes a concept of physical-virtual integration in teaching where a virtual reality environment is integrated with physical material, including a 3D printer, and applied in energy education. To evaluate the proposed teaching method, tests were carried out in a study involving elementary school students. Three classes, selected at random, participated in the research, and three different teaching methods were used in each: the virtual reality teaching method, a physical materials method, and a virtual-physical integration method. After the teaching sessions written tests completed by the students were used to assess the learning outcome. The results showed that students from the virtual reality class performed the worst with an average score of 73.1, the physical material group was better with an average score of 78.5, and students who were exposed to integrated virtual-physical teaching were the best performers with an average score of 89.6. The virtual-physical integration teaching method was also found to effectively improve learning motivation, extend the attention span, and enhance the overall learning process. If the method is adopted for general use, with a combination of virtual and physical material, this will maximize the student’s learning outcome.
Hong, Jia-Bin, and 洪佳賓. "The Development of Non-Intrusive Virtual-Instrument Power Monitoring System Based On Universal Serial Bus Interface." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/t375ye.
Повний текст джерела中原大學
電機工程研究所
91
Following the grown of the industry, it is increase in use of the any kinds of the load equipment, so the large power system will become more complication, and it will be increase in cost of the load monitoring. The virtual instrument (VI) application, which integrates all data acquisition, processing, display, and database management in one metering system, enhances the convenience, efficiency, flexibility, and economy of the power monitoring task. Because the power systems become more complication, how to ensure that the data of power waveform transfer is fast and correct, the chosen of the transfer interface is more important. However, the overall performance of the VI system is specifically limited by the bandwidth of the communication interface between the power meters and the host computer, when conventional serial communications are applied. The distributed VI power monitoring system will significantly enhance its real-time performance by interfacing the VI host computer via the universal serial bus (USB). LOW-COST power monitors are in great demand for industrial and commercial applications to assess power quality and manage demand and energy. Observing the energy consumption of electric loads, convectional load monitoring system needs to install hardware circuit on each load to be monitored. However, non-intrusive load monitoring system (NILMS) only needs to install a monitoring device on the electric power entrance point to collect the data for energy consumption of the loads by analyzing the signal waveforms collected and identifying the loads accordingly. And non-intrusive load monitoring system can be combined with the virtual instrument power monitoring system, so the cost is less than those of the conventional one. The thesis aims at developing the virtual instrument power monitoring meter, which transferred the data or command via universal serial bus (USB) interface. However, the techniques needed for load identification are more sophisticated as compared with the convectional one. So, how to choose the load feature is very important. In the convectional feature extraction method, one of the statistics method is principal component analysis(PCA), the PCA method can solve the linear problem. Nevertheless, to solve the nonlinear problem, we should use nonlinear method, like nonlinear principal analysis(NLPCA). The decision boundary feature extraction(DBFE) method is available for the nonlinear problem. In the thesis, we will compare with three kinds of feature extraction method, and which method can identify the load combination the highest, and the computer time and floats is the minimization, the method we will be proposed.
Danese, Alessandro. "System-level functional and extra-functional characterization of SoCs through assertion mining." Doctoral thesis, 2018. http://hdl.handle.net/11562/979447.
Повний текст джерелаSurendra, S. "Development Of Algorithms For Improved Planning And Operation Of Deregulated Power Systems." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2336.
Повний текст джерелаLarsson, Erik, and Jesper Sundin. "Optimization of a large scale solar installation through virtual storage : Profitability of using the refrigeration system in a grocery store as energy storage." Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388393.
Повний текст джерелаΘεοτόκης, Εμμανουήλ. "Χαρακτηριστικά και ρυθμίσεις Α.Π.Ε. σύμφωνα με τις απαιτήσεις σύνδεσης στο δίκτυο". Thesis, 2014. http://hdl.handle.net/10889/7515.
Повний текст джерелаIn the first chapter, there is a general description about renewable energy resources and more specific, about the wind energy. We present the current worldwide electrical power production and the future requirements for electrical power production in Europe and Greece. In the second chapter, we study the features of the wind performance and the equations that allows us to drain energy from the wind ,using a wind turbine. The third chapter presents the components, the kinds of control and the categories of wind turbines that are in use in industry nowadays. The fourth chapter presents the technical requirements for the wind farms in the Greek System of Electrical Energy. In the fifth chapter we use the program Matlab - Simulink in order to simulate a non-linear direct power control of DFIG wind turbines for Virtual Power Plant (V.P.P.) integration.
Nordlund, Edvard, and Emil Lind. "Determining the Technical Potential of Demand Response on the Åland Islands." Thesis, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-451184.
Повний текст джерела