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Itens para a visualização no momento 11-20 of 20
Proteção de transformadores de potência eclassificação de transitórios elétricos por meio da transformada wavelet discreta
(Universidade Federal de Santa Maria, 2014-02-20)
This dissertation presents the development of an algorithm for classifying
electrical transients in power transformers for protection. Initially the main transient
involving power transformers were analyzed, with a special ...
Metodologia para análise da tarifa branca e da geração distribuída de pequeno porte nos consumidores residenciais de baixa tensão
(Universidade Federal de Santa Maria, 2014-02-28)
This Master s Dissertation presents the development of a methodology that analyzes the impact of the White Tariff considering the distributed generation to low voltage residential consumers. The White Tariff has the aim ...
Estimação fasorial aplicada a relés de proteção numéricos utilizando os métodos de ajuste de curvas e redes neurais artificiais
(Universidade Federal de Santa Maria, 2014-02-21)
This dissertation proposes two methodologies for the phasor estimation on protective relays in Electrical Power Systems. Firstly, a theoretical introduction of signal processing, the structure of a protective relay and ...
Uma metodologia para a identificação de perdas não técnicas em grandes consumidores rurais
(Universidade Federal de Santa Maria, 2014-09-26)
Irrigation of large agricultural areas represents a significant portion of energy consumption in food producing countries. The electric power of irrigation pumps in rice crops, for example, may exceed 800 HP, while these ...
Emulação dos regimes permanente e transitório das turbinas de eixo horizontal incluindo o modelo estático da turbina Magnus
(Universidade Federal de Santa Maria, 2014-01-24)
The lodgment of wind sites is in a visible growing demand not only in Brazil, but all over the
world. The wind energy, even though consolidated, still hosts many scientific researches and
industrial development in several ...
Sistema de geração distribuida de energia fotovoltaica integrado a um sistema de iluminação pública à base de LEDs
(Universidade Federal de Santa Maria, 2014-02-24)
This work presents the development of an electronic topology to supply an LED-based
street lighting system, which is integrated to a grid-connected photovoltaic distributed
generation system. The lighting systems need ...
Nova metodologia para a estimação da seção em falta em sistemas elétricos de potência com foco nos alarmes dos relés de distância e busca de seções isoladas
(Universidade Federal de Santa Maria, 2014-02-25)
This works proposes a novel methodology for Fault Section Estimation in Power Systems. This document describes a computational tool to assist operators of electrical system in decision-making, thus ensuring the reliability ...
Rastreamento do ponto de máxima potência de turbinas magnus acionando geradores elétricos
(Universidade Federal de Santa Maria, 2014-01-24)
The constant human need for electricity, as well as the increasing demand for energy causes the use of finite sources, as oil and coal. The search for alternative energy sources as wind harvesting is the motivation for ...
Metodologia de projeto de inversores para redução do custo de sistemas fotovoltaicos
(Universidade Federal de Santa Maria, 2014-02-25)
In photovoltaic systems, the lowest energy cost is not always achieved by an inverter with minimized cost or maximized efficiency. It is important to adopt methodologies that optimize the balance between system losses and ...
Reconfiguração de redes de distribuição considerando multivariáveis e geração distribuída
(Universidade Federal de Santa Maria, 2014-02-28)
The new design of electric power system, called Smart Grid, has emerged as a new challenge
especially for power distribution networks, which need to promote greater functionality such
as real-time monitoring of the ...