Electrical Distribution Systems
Mostrando 13-24 de 68 artigos, teses e dissertações.
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13. Technique applied in electrical power distribution for Satellite Launch Vehicle
Abstract: The Satellite Launch Vehicle electrical network, which is currently being developed in Brazil, is sub-divided for analysis in the following parts: Service Electrical Network, Controlling Electrical Network, Safety Electrical Network and Telemetry Electrical Network. During the pre-launching and launching phases, these electrical networks are associ
J. Aerosp. Technol. Manag.. Publicado em: 2010-12
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14. Estudo do aumento do desempenho de um sistema de tomografia de impedância elétrica através do método de otimização topológica. / Increasing electrial impedance tomography system performance through the topology optimization method.
Electrical Impedance Tomography images the interior of a body based on electrical quantities measured on the surface of it. Mathematically, the technique finds the electric admittivity distribution in a given body model which reproduces the boundary measurements of electric currents and potentials on electrodes attached to that body. Therefore, the admittivi
Publicado em: 2010
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15. Estudo de viabilidade de um sistema de monitoramento de baixo custo para os sistemas de distribuição reticulados subterrâneos / Viability Study of a Low Cost Monitoring System for Underground Power Distribution
This work presents a viability study for a Low-cost Monitoring System (SMBC), through the examination of the operational improvements on electrical network distribution systems when new functions are added to network protectors relays allowing remote monitoring and control using typical automation protocols. The improvements on energy supply quality by reduc
Publicado em: 2010
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16. Obtenção de uma porcelana dielétrica a partir de matérias-primas do Rio Grande do Norte
The dielectric porcelain is usually obtained by mixing various raw materials proportions and is used in the production of electronic equipment for various applications, from capacitors of high and low Power to insulators for low, medium, high and extra high voltage, which are used in distribution lines and transmission of electricity.This work was directed t
Publicado em: 2010
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17. ASPECTOS TÉCNICOS E OPERACIONAIS DO USO DE MICROTURBINAS CONECTADAS AOS SISTMAS ELÉTRICOS PARA GERAÇÃO DISTRIBUÍDA DE ENERGIA / TECHNICAL AND OPERATIONAL ASPECTS OF THE USE OF MICROTURBINES CONNECT TO THE ELECTRICAL SYSTEM FOR DISTRIBUTED ENERGY GENERATION
The considerable increase in energy demand has increased the interest in reducing costs, improving reliability, quality and stability of power generation systems. The connection of distributed generation (DG) can be used as a strategic element to improve the voltage levels in power system. Microturbines (MT) have certain advantages over other models of GD, s
Publicado em: 2010
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18. Optimal reconfiguration of the electric power distribution systems using a modified ant colony system algorithm / Reconfiguração ótima de sistemas de distribuição de energia elétrica baseado no comportamento de colônias de formigas
O objetivo deste trabalho é apresentar uma nova abordagem para obtenção de configurações para sistemas de distribuição de energia elétrica com o intuito de minimizar o valor de perdas ativas sem violar as restrições operacionais. Para isso, considera-se que os sistemas de distribuição estão operando em regime permanente e que suas fases estão e
Publicado em: 2010
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19. Electrical system fault based on the resulting magnetic signature by Wavelet. / Análise da assinatura magnética resultante de faltas em sistemas elétricos via wavelets.
A methodology based on the analysis of magnetic fields for monitoring the quality of energy in electrical systems is presented herein. Aspects referring to fault detection in electrical systems in particular are evaluated. Contrary to the traditional monitoring process, in which sensors must be physically linked to the circuits under analysis, the results ar
Publicado em: 2009
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20. On board sensing system to control variable rate agricultural inputs / Sistemas de sensoriamento embarcado para uso em controle de aplicações de insumos agrícolas à taxa variável
The development of systems able to join different technological tools is very important in order to provide support for Precision Agriculture and it stimulates the creation of interdisciplinary teams to obtain favorable results to increase agricultural productivity. The main goal of this work is to study applications of embedded sensing systems in agricultur
Publicado em: 2009
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21. MÉTODOS PARA OTIMIZAÇÃO DOS AJUSTES DOS REGULADORES DE TENSÃO E ZONAS DE TAP EM SISTEMAS DE DISTRIBUIÇÃO / METHODS FOR OPTIMIZATION OF THE VOLTAGE REGULATORS AND TAP ZONES IN DISTRIBUTION SYSTEMS
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy supplied. Electrical equipments quality, efficiency and useful life depend directly of the power quality supplied. In addition to operation of equipments, supply of energy within the limits must b
Publicado em: 2009
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22. Metodo baseado em logica nebulosa para alocação de geradores distribuidos sob a optica do perfil de tensão / Method based on fuzzy logic for allocating distributed generators from the viewpoint of the voltage profile
This work consists in proposing a methodology based on Fuzzy Logic to obtain an index, which classifies the buses more suitable to install a distributed generator in an electric power distribution system. Themethodologywas developed taking into consideration the difficulty tomaintain a suitable voltage profile in distribution systems, so the methodology resu
Publicado em: 2009
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23. Relationship between physical properties convective clouds and cloud-ground lightining / Relações das propriedades físicas das nuvens convectivas com as descargas elétricas
The knowledge of physical and microphysical properties associated to cloud-ground lightning occurrence is very important for determination of potential forecast parameters of electrical discharges activity. The identification of these parameters could give valuable contribution for different segments of society, such as the sectors of electric energy distrib
Publicado em: 2009
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24. Analise dos sistemas de proteção e controle de instalações industriais com geradores sincronos durante operação ilhada / Protection and control systems analysis of industrial plants with synchronous generators during islanded operation
Modern industrial systems are very sophisticated installations with a high number of automatic processes and capability of isolated (islanded) operation after contingences by using onsite generators composed mainly by synchronous machines and steam turbines. Such installations, in the presence of generators, are generically called autoproducers. Since many o
Publicado em: 2009