Buscar
Itens para a visualização no momento 311-320 of 326
Análise das relações das tensões de entrada de inversores multiníveis híbridos conectados em cascata para minimizar a THD da tensão de saída
(Universidade Federal de Santa Maria, 2012-04-27)
This Master Thesis presents a study considering multilevel inverters formed from two and three level cascaded inverters.
The literature presents several papers on asymmetric multilevel inverters and most studies are related ...
Reator eletrônico para lâmpadas de descarga em alta pressão baseado no conversor biflyback inversor
(Universidade Federal de Santa Maria, 2011-07-26)
The study of the best utilization of high intensity discharge lamps deals with the great global concern with energy efficiency. Electronic ballasts are the current devices that can make the good use of high luminous efficacy ...
Análise comparativa da energia injetada na rede por inversores módulos CA utilizados em sistemas fotovoltaicos
(Universidade Federal de Santa Maria, 2013-05-29)
This Master's Dissertation aims to compare two topologies of AC Module converters, applied in photovoltaic systems. The principles of operation, the characteristic equations, the parameters found are detailed for both ...
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 ...
Modelagem e controle de um reator eletrônico para lâmpadas HPS baseado na conexão diferencial de conversores CC
(Universidade Federal de Santa Maria, 2012-02-28)
This paper presents the development of an electronic ballast for high intensity discharge lamps, using the differential connection technique applied to Flyback converters. The power factor correction stage was implemented ...
Método de controle e supervisão para grupos motores geradores com velocidade variável
(Universidade Federal de Santa Maria, 2013-02-27)
Motor generator sets are widely used to generate electricity in case of grid failure or to
supply part of the demand for commercial and industrial consumers. The vast majority of
motor generator sets work with constant ...
Controle adaptativo de corrente aplicado a conversores estáticos conectados à rede elétrica
(Universidade Federal de Santa Maria, 2013-02-28)
This thesis addresses the design of adaptive current controllers applied for voltagesource
grid-connected converters with LCL-filter. Due to the grid equivalent impedance
uncertainty and/or variation at the point of ...
Projeto e validação experimental de um controlador robusto H2 aplicado a conversores Boost
(Universidade Federal de Santa Maria, 2011-07-25)
This dissertation presents as the main contribution the design and experimental
validation of a robust H2 controller applied to boost converters with variations on the
parameters load resistance, input voltage and operating ...
Metodologia para despacho de fontes de GD a biogás em redes de distribuição utilizando lógica fuzzy
(Universidade Federal de Santa Maria, 2012-03-19)
The aim of this work is determine the most appropriated period for connection of a
particular generation source fueled by biogas on a distribution network. The biogas is
produced through anaerobic reactions that occur ...
Algoritmo de alto desempenho para proteção numérica de linhas de transmissão imune a oscilações de potência
(Universidade Federal de Santa Maria, 2012-05-04)
This Doctoral Thesis proposes a new methodology for transmission line protection
tolerant to power swings. The algorithm developed has the ability to detect, classify and
locate all fault types with and without power ...