Electrical Power System Analysis
Mostrando 13-24 de 83 artigos, teses e dissertações.
-
13. Study and characterization of indium oxynitride photoconductors
Multifunctional materials are a new class of thin films and coatings. These materials show interesting characteristics for application in many scientific areas, in special electronic and photonic technologies. These characteristics include sensitivity for thermal, light, mechanical, chemical and other influences, high resistivity, high electrical isolation a
Mat. Res.. Publicado em: 03/12/2013
-
14. Study of indium nitride and indium oxynitride band gaps
This work shows the study of the optical band gap of indium oxynitride (InNO) and indium nitride (InN) deposited by magnetron reactive sputtering. InNO shows multi-functionality in electrical and photonic applications, transparency in visible range, wide band gap, high resistivity and low leakage current. The deposition processes were performed in a magnetro
Mat. Res.. Publicado em: 07/05/2013
-
15. ESTUDO DE UM REATOR SOLAR HÍBRIDO PARA CURA ACELERADA DO CONCRETO EM ÁGUA MORNA. / STUDY OF A HYBRID SOLAR REACTOR FOR ACCELERATED CURING OF CONCRETE IN WARM WATER.
The Portland cement concrete material is the most consumed after the water worldwide due to their versatility molding, strength and durability as a structural material. The curing is the procedure that aims to keep the concrete saturated with water in their early ages and it is essential to ensure the reactions of cement hydration, promoting its consolidatio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/11/2012
-
16. Uma proposta de modelagem de condicionadores de ar split visando a análise de pedidos de ressarcimento por danos elétricos
The large number of refunding request for electrical and electronic equipment damages has attracted the attention of the electric utilities, consumers, regulatory and other government agencies. Such concerns are not associated only with the financial contents involved, but especially with the social impacts associated to requests, decisions, conflicts and ot
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
-
17. Desenvolvimento de modelos e algoritmos sequenciais e paralelos para o planejamento da expansão de sistemas de transmissão de energia elétrica / Development of mathematical models, sequential and parallel algorithms for transmission expansion planning
The main objective of this study is to propose a new methodology to deal with the long-term transmission system expansion planning with multiple generation dispatch scenarios problem (TEP-MDG). With the methodology proposed in this thesis we aim to build expansion plans with minimum investment cost and also capable of meeting the new demands of modern electr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
-
18. Análise do comportamento eletroaeroelástico de uma seção típica para geração piezelétrica de energia / Electroaeroelastic behavior analysis of a typical section for piezoelectric energy harvesting
Converting aeroelastic vibrations into electricity for low power generation has received growing attention over the past few years. In addition to potential applications for aerospace structures, the goal is to develop alternative and scalable configurations for wind energy harvesting to use in wireless electronic systems. The use of a typical airfoil sectio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
-
19. Desafios e oportunidades da geração eólica e termelétrica a gás natural no Sistema Elétrico Peruano. / Challenges and opportunities of the wind generation and to natural gas thermal in the Peruvian Electricity System.
Several countries around the world have increasingly sought to diversify their electrical matrix in order to reduce dependence on fossil fuels and reduce emissions of gases responsible for worsening greenhouse effect in the atmosphere. As a result, has grown the participation of some renewable energy sources that until two decades ago did not occupied a prom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012
-
20. Monitoramento de temperatura do motor de aerogeradores de pequeno porte utilizando Power Line Communication -PLC
The control system and supervision have been revealed very important in product systems. To guarantee the function with quality, industrial process requires a permanent control being necessary keeping stable some variables. One important factor to point using remote monitoring is the possibility to centralize the control of one process in distinct place, man
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
21. PROPOSTA DE UM SISTEMA HÍBRIDO COMPOSTO POR REDES NEURAIS ARTIFICIAIS E ALGORÍTMOS GENÉTICOS PARA O TRATAMENTO DE ALARMES E O DIAGNÓSTICO DE FALTAS EM SISTEMAS ELÉTRICOS DE POTÊNCIA / PROPOSAL OF A HYBRID SYSTEM COMPOSED OF ARTIFICIAL NEURAL NETWORKS AND GENETIC ALGORITHMS FOR THE TREATMENT OF ALARMS, AND FAULT DIAGNOSIS IN ELECTRICAL POWER SYSTEM
This work proposes a hybrid system for alarm processing and fault diagnosis in electrical networks which use two methods of computational intelligence: Generalized Regression Neural Network and Genetic Algorithms. The neural network has the function of processing the set of received alarms and present as a response the characteristic(s) event(s), using for t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
-
22. Análise do comportamento de uma linha de um pouco mais de meio comprimento de onda sob diferentes condições de operação em regime permanente e durante a manobra de energização / Analysis of the behavior of an isolated transmission line with a little more than half wave lenght for different operating conditions in steady state and during the energization manouver
This work presents an analysis of the behavior of an isolated transmission line with a little more than half-wave length (2600 km) on fundamental frequency, 60 Hz, connected to an infinite busbar for different operating conditions. The voltage and current profiles for different loading conditions are monitored along the line. An analysis of the influence of
Publicado em: 2010
-
23. STOCHASTIC DYNAMIC PROGRAMMING AND CONVEX HULL ALGORITHM IN THE HYDROTHERMAL SYSTEMS OPERATION PLANNING / PROGRAMAÇÃO DINÂMICA ESTOCÁSTICA E ALGORITMO DE FECHOS CONVEXOS NO PLANEJAMENTO DA OPERAÇÃO DE SISTEMAS HIDROTÉRMICOS
This thesis presents a new approach for the expected-cost-to-go functions modeling used in the stochastic dynamic programming (SDP) algorithm. The proposed technique is applied to the long-term operation planning of electrical power systems. Using state space discretization, the convex hull algorithm is used for constructing a series of hyperplanes that comp
Publicado em: 2010
-
24. Study of optical and electro-optical properties of diamond-like carbon films - DLC. / Estudo das propriedades ópticas e eletro-ópticas de filmes de carbono amorfo tipo diamante - DLC.
In this work it was studied electrical and optical characteristics of diamond-like carbon (DLC) films deposited in a reactive RF magnetron sputtering system on silicon and glass substrates. Samples were deposited at different process conditions in each type of substrate at two pressure conditions (5 mTorr and 10 mTorr) and four conditions of RF power (100 W,
Publicado em: 2010