Short Circuit In Transmission Line
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Calculo dos parametros de linhas de transmissão trifasicas atraves das tensões e correntes em seus terminais / Calculation of parameters of thress-phase transmission lines through voltages and currents in their terminals
The objective of this work is to calculate the longitudinal and transversal transmission line parameters using phase currents and voltages. Developed equations are used, in the modal domain, considering current and voltages found between a line terminal and an open line terminal, and a short-circuit terminal. . Initially, the basic transmission line theory i
Publicado em: 2009
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2. Adaptação do método de Wiszniewski para agregar maior exatidão à localização de faltas em linhas de transmissão com dados de um terminal
Transmission line automatic fault location using data from only one terminal (local terminal) takes into consideration some simplifications to allow the estimation without data from other terminal (remote terminal). The use of these methods, when the fault has high fault resistance, generally produces estimative with inacceptable high errors intended to prac
Publicado em: 2008
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3. Classificação e localização de faltas em linhas de transmissão usando diferentes arquiteturas de redes neurais artificiais. / Classification and location faults in transmission lines, using different artificial neural networks architectures.
This work presents the development of algorithms for determination of the estimate of the distance of occurrence of fault in a high voltage transmission line, in relation to a local terminal, and also the classification of the fault type, using techniques based on artificial neural networks. The tests and the validation of the proposed algorithms are made us
Publicado em: 2008
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4. Localização de faltas em linhas de transmissão: desenvolvimento de novos algoritmos e implementação de sistema computacional para aplicações práticas
Transmission line automatic fault location allows to estimate the approximate point at the line where the short-circuit occurs, using voltage and current data from one or more of its ends. The maintenance team can reach the fault local and restore the operational conditions fast and more efficiently, increasing the reliability of the power electric system an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2007
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5. The thin wires modeling using the transmission line modeling method (TLM) / Modelagem de condutores finos utilizando o mÃtodo de modelagem por linhas de transmissÃo (TLM)
Numeric methods have been a very attractive alternative in the analysis and solution of problems in electromagnetic fields. Those are applicable to a high variety of problems involving complex geometry, heterogenic material composition and boundary condition diversities. This research has the objective of studying the modeling of thin wires using the numeric
Publicado em: 2006
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6. Design, development and implementation of a solid-state pulse modulator for high-power pulse transmitters / Projeto, desenvolvimento e construção de um modulador de pulso estado-solido para transmissores pulsados de alta potencia
This work describes the development of a modular line-type solid-state pulse modulator topology to be applied in magnetron pulsed power radar transmitters, commonly found on tracking, weather and air traffic management radars. This research includes the design, development and assembling of a pulsed modulator for the Barreira do Inferno Launching Center (CLB
Publicado em: 2005
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7. SISTEMA DE IDENTIFICAÇÃO E LOCALIZAÇÃO DE FALTAS EM LINHAS DE TRANSMISSÃO BASEADO EM REDES NEURAIS / IDENTIFICATION SYSTEM OF FAULTS IN TRANSMISSION LINES BASED ON NEURAL NETWORKS
Quando ocorre algum tipo de falta em uma Linha de Transmissão (LT), sua localização exata é essencial para uma rápida recomposição do Sistema Elétrico. Métodos que utilizam tensão e corrente de apenas um terminal contêm simplificações que podem acarretar erros. Esta dissertação investiga a aplicação de Redes Neurais Artificiais (RNA) na obte
Publicado em: 2002
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8. Simulação analogica de linhas de transmissão utilizando-se circuitos integrados
The main goal of this work was the development of a didatic tool, based on integrated circuits, for the analog simulation of transmission lines. The obtained results allow for a quantitative analysis of the currents and voltages along the line. Initially, a study of transmission line models were carried out. As the circuit was implemented with operational am
Publicado em: 1994
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9. g-Factor of electron centered in symmetric cavity
The cyclotron frequency of an electron localized in the center of a cylindrical microwave cavity differs slightly from that in free space. To see this, the system is modeled by a series resonant lc circuit for the cyclotron motion connected across the center of a section of two-wire transmission line (the cavity). When the transmission line is infinitely lon