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Monitoramento e acionamento remoto da movimentação e arrefecimento de painéis fotovoltaicos para maximização da potência e eficiência
(Universidade Federal de Santa Maria, 2019-03-07)
The world's electricity consumption increases every day along with concerns about the
environment. In order to supply the increase in the demand for electric power in Brazil there
has been in recent years a great expansion ...
Estratégias de controle para grupo motor-gerador a etanol operando com velocidade variável
(Universidade Federal de Santa Maria, 2019-02-28)
This master thesis presents two strategies for speed control and power generation
by a variable speed ethanol generator set (genset), where the power generated is reflected
in the current of the battery bank. Initially, ...
Otimização, seleção e apontamento de arranjos lineares de antenas através da técnica de otimização por enxame de partículas
(Universidade Federal de Santa Maria, 2017-02-24)
The Particle Swarm Optimization Technique has been widely studied by researchers,
since they act as a stochastic optimization process which can be applied in many areas, for
instance in electromagnetism. Researches have ...
Modelagem e comparação da potência elétrica e do coeficiente de potência de turbinas magnus segundo o comportamento dos perfis cilíndricos
(Universidade Federal de Santa Maria, 2017-02-20)
This thesis presents the model of Magnus turbines based on the forces produced by the cylindrical airfoils, resulting in the curves of net mechanical power and power coefficient, besides demonstrating the effects of the ...
Análise da transferência de ondulação de baixa frequência em drivers de LEDs
(Universidade Federal de Santa Maria, 2019-03-01)
This work presents the analysis of low frequency ripple transmission from the bus voltage to the output current in LED drivers, in the power control stage. The buck, boost and buck-boost converters, operating in discontinuous ...
Modelagem e controle do conversor DAB para interface entre banco de baterias e sistema elétrico de potência
(Universidade Federal de Santa Maria, 2017-08-07)
This Master's Dissertation presents the development of a Dual Active Bridge (DAB) converter for charging a battery bank, which is connected to a DC bus, which is connected to the electric power system by means of an inverter. ...
Projeto e análise de observadores adaptativos aplicados ao controle sensorless de máquinas síncronas de ímãs permanentes
(Universidade Federal de Santa Maria, 2018-08-06)
This master dissertation presents contributions to the study, development, and design
of adaptive observers applied to the estimation of rotor speed of permanentes magnet
synchronous machines. The rst proposed technique ...
Controle de demanda e formação de microrredes com grupos moto-geradores distribuídos
(Universidade Federal de Santa Maria, 2019-04-16)
The present work developed a methodology that was applied in a study that had as a starting point the peak shaving of an electrical installation, aiming at the reduction of costs with the energy bill. To achieve this, the ...
Avaliação do desempenho dos métodos de proteção contra a perda de excitação em geradores síncronos: uma contribuição para a melhoria da técnica baseada em combinações de sinais
(Universidade Federal de Santa Maria, 2019-07-19)
This work aims to evaluate the behavior of synchronous generators against total (TLOE)
and partial (PLOE) loss of excitation, to demonstrate the behavior of the main electrical variables
involved, to analyze the performance, ...
Circuito para monitoramento e restabelecimento da tensão elétrica em células a combustível tipo PEM usando curtos-circuitos controlados
(Universidade Federal de Santa Maria, 2019-03-31)
Electricity generation from renewable sources can contribute significantly to mitigate the impacts that non-renewable sources have on nature. Of these, hydrogen power generation is of great interest and can be easily ...