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Itens para a visualização no momento 111-120 of 434
Controle inteligente do despacho de geração distribuída para atendimento dos limites de demanda de uma microrrede
(Universidade Federal de Santa Maria, 2018-03-28)
The use of distributed generation (DG) allied to smart grids offers a series of benefits for the electrical system and, consequently, the society that makes use of it. Specifically in the economic and planning context, ...
Análise de sensibilidade na metodologia nodal para o cálculo da tarifa de uso do sistema de transmissão
(Universidade Federal de Santa Maria, 2018-07-19)
The reform of the 90s resulted in a vast impact on the Brazilian electrical system, mainly due to privatizations that occurred in that decade. The opening in the energy market has de-verticalized the four sectors of the ...
Modulação phase disposition com algoritmo de sorting para conversores multiníveis simétricos em cascata
(Universidade Federal de Santa Maria, 2018-08-03)
This master thesis presents a modulation technique with sorting of the command
signals of semiconductor devices, applied to symmetric cascaded multilevel converters.
This technique, referenced here as Phase Disposition ...
Modelagem e controle de um conversor CUK isolado com célula R2P2 e multiplicador de tensão
(Universidade Federal de Santa Maria, 2018-07-27)
In recent years, there is an increasing energy demand due to the use of fossil fuels and it
has caused very large impacts on nature. As scientists and industries are aware that this
type of production uses limited reserves, ...
Ensaio automatizado de medição da eficiência energética de inversores fotovoltaicos conectados à rede
(Universidade Federal de Santa Maria, 2018-07-16)
The objective of this work is the development of an automated test bench to measure the energy efficiency of grid connected photovoltaic inverters. A detailed study of the energy efficiency measurements standards for ...
Contribuições ao acionamento e controle dos motores de relutância variável e síncrono de relutância
(Universidade Federal de Santa Maria, 2019-02-15)
This master thesis presents contributions to the driving and control of switched
reluctance motors and synchronous reluctance motors. The main characteristics of the
switched reluctance machine are the low production ...
Metodologia de projeto de um inversor ressonante auto-oscilante operando em alta frequência para aplicações a LED.
(Universidade Federal de Santa Maria, 2019-02-05)
In this dissertation, a design methodology is proposed for the Self Oscillating Resonant Converter operating in high frequency for LED lighting aplications. The high-frequency operation of electronic circuits has, as the ...
Técnicas para otimização de conversores da família boost com alto ganho de tensão e alto rendimento aplicados à célula a combustível
(Universidade Federal de Santa Maria, 2019-02-28)
In this work, it is proposed methodologies for design optimization of high gain boost static converters
applied to fuel cells. In this aplication, two types of boost converters are evaluated.
The first one is based on ...
Concepção de um conversor DC-DC auto-oscilante aplicado a um sistema energy harvesting
(Universidade Federal de Santa Maria, 2015-09-01)
This thesis aims to present the design and development of a self-oscillating DC-DC converter applied to an Energy Harvesting (EH) system. The relevance of this study is caracterized by the proposed standard analysis with ...
Controle individual de passo para turbinas eólicas utilizando controlador adaptativo
(Universidade Federal de Santa Maria, 2019-02-26)
This Master Thesis deals with the problem of reducing the resulting asymmetrical
mechanical loads on the structure of large wind turbines, with horizontal axis and three
blades, by means of individual pitch control of ...