Flexible Transmission Systems
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Algoritmo híbrido para projeto de controladores de amortecimento de sistemas elétricos de potência utilizando algoritmos genéticos e gradiente descendente / Hybrid algorithm for damping controller design in electric power systems via genetic algorithms and gradient descent
Os sistemas elétricos de potência são frequentemente submetidos a perturbações causadas, por exemplo, por um aumento súbito de carga ou por um curto-circuito em uma linha de transmissão. Estas perturbações podem gerar oscilações eletromecânicas no sistema, uma vez que a velocidade dos geradores oscila. Para reduzir tais oscilações, controladore
Publicado em: 2011
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2. A influência do IPFC na estabilidade de pequenas perturbações de sistemas elétricos de potência / The influence of IPFC on small-signal stability of power systems
Neste trabalho é avaliada a influência do controlador IPFC (Interline Power Flow Controller ) no desempenho de sistemas elétricos de potência quanto à estabilidade a pequenas perturbações. Foi utilizado um modelo de injeção de potência para inclusão do IPFC em programas de fluxo de carga, considerando a representação das fontes de tensão do dis
Publicado em: 2010
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3. Proposta de melhoria de tempo de resposta para o protocolo FTT-CAN : estudo de caso em aplicação automotiva
Embedded computing systems have become widely used in many areas. The greater part of those systems has time constraints and therefore they can be characterized as real time embedded systems. Nowadays, distributed computing has reached the embedded application, where some fieldbuses are already being used as communication platforms. Some important researches
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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4. Desenvolvimento e teste de protótipos de brincos para identificação eletrônica em suínos / Development and testing of prototypes of ear tags for electronic identification in swine
Is the more relevant subject in tariffs around the world, where the need for food safety and consumer concern about the product consumed leading to the vision of the need to ensure the health, quality and origin of the product. With increasing computing power at a cost flexible techniques of digital signal processing systems coupled to electronic instrumenta
Publicado em: 2010
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5. An approach to design feedback controllers for flight control systems employing the concepts of gain scheduling and optimization.
The role of feedback in the design of aircraft stability and control is becoming increasingly important. The basic reason driving this trend is the necessity to cope with a growing number of more stringent requirements, which are sometimes conflicting. This work presents a design methodology applicable to flight control laws, which can be either a control an
Publicado em: 2009
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6. Distribution system FACTS (flexible AC transmission systems) application - performance simulation. / Aplicação do dispositivo FACTS (Flexible AC Transmission Systems) em sistema de distribuição -simulação de desempenho.
The new FACTS technologies applied to the transmission system, based on power electronics, can also be useful to the distribution. For that, it is necessary to drive a procedure to consolidate the use and the performance for their application without risks. In this work two aspects will be approached. The first refers to the application of a FACTS device act
Publicado em: 2006
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7. A influencia de controladores FACTS na estabilidade de angulo a pequenas pertubações de sistemas eletricos de potencia
This master s dissertation presents an assessment of Flexible AC Transmission Systems (FACTS) controllers performance on power system small-signal angle stability improvement. The potential of the Power Sensitivity Model (PSM), an alternative approach to the classical Heffron-Phillips model (HPM) for study and analysis of poorly damped low frequency electrom
Publicado em: 2005
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8. Um modelo de espaço de estados com representação de segunda ordem para a analise das oscilações de modo interarea em sistemas de energia eletrica / A space state model including second order representation for the analysis of power systems inter-area mode oscillations
In this work, the analysis of power systems inter-area mode oscillations is performed by the application of two different methodologies: first, the linear modal analysis, and then the analysis including second order nonlinear terms from a Taylor series expansion, with the application of the method of normal forms of vector fields. In this case, the method of
Publicado em: 2005
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9. A comparison of flexible coupling models for updating in rotating machinery response
This paper analyzes the effects of the mathematical models of flexible couplings in rotating mechanical systems in terms of their vibrational behavior. The residual unbalance of the coupled shafts is considered to be the main source of vibration in the rotating system. The moments and the frequencies of the forces, which result from these effects, are close
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-09
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10. Otimização da expansão conjunta da geração e transmissão em sistemas hidrotermicos de potencia atraves do algoritmo de decomposição de benders e equacionamento das incertezas relativas as vazoes afluentes aos reservatorios, das usinas hidroeletricas, previsões do mercado e custo de instalação das novas usinas
A new approach is developed in this work for the joint generationltransmission expansion planning of hydrothermal electric power systems. The goal is to determine the generating capacity of the candidate plants, the commissioning dates of their generating units, their production scheduling, the new transmission lines and their voltage levels, as well as the
Publicado em: 1995
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11. Study of novel rosin-based biomaterials for pharmaceutical coating
The film forming and coating properties of Glycerol ester of maleic rosin (GMR) and Pentaerythritol ester of maleic rosin (PMR) were investigated. The 2 rosin-based biomaterials were initially characterized in terms of their physicochemical properties, molecular weight (Mw), and glass transition temperature (Tg). Films were produced by solvent evaporation te
Springer-Verlag.