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Projeto e implementação de um controle modular HCC para integração de fontes alternativas de energia
(Universidade Federal de Santa Maria, 2006-02-24)
The experience of electric energy shortage in 2001 demonstrated that our dependence almost exclusively on hydroelectricity could fetch great problems to Brazil. Thus being, the existence of trustworthy alternatives of ...
Aplicação de uma rede Fieldbus ao controle de reatores eletrônicos para lâmpadas HPS
(Universidade Federal de Santa Maria, 2004-02-27)
This work describes the application of a control fielbus that transmits data
over the power lines to control eletronic ballast for high-pressure sodium lamps.
Initially, a power line transceiver has been designed, so it ...
Desenvolvimento de uma rede Fieldbus para gerenciamento do sistema de distribuição de energia elétrica
(Universidade Federal de Santa Maria, 2004-01-26)
This work describes the design and implementation of a Fieldbus
dedicated to energy management using a power modem with FSK
modulation. The main characteristics of Fieldbus commonly accepted in
the market are presented ...
Reator eletrônico auto-oscilante com alto fator de potência para alimentação de quatro lâmpadas fluorescentes independentes
(Universidade Federal de Santa Maria, 2004-02-27)
This work describes a high-power-factor electronic ballast to supply four
fluorescent lamps independently. Fluorescent lamp operational aspects are
discussed, and a mathematical model to simulate the fluorescent lamp ...
Análise, projeto e implementação de um inversor PWM monofásico aplicado a UPS utilizando células de comutação suave
(Universidade Federal de Santa Maria, 2002-09-23)
This thesis presents an analysis, design and implementation soft
switching inverters for UPS applications. The inverters considered are constituted
of soft switching cells, which provide zero voltage switching (ZVS) for ...
Contribuição ao estudo da máquina assíncrona trifásica duplamente alimentada aplicada a aerogeradores de velocidade variável
(Universidade Federal de Santa Maria, 2006-07-28)
This work presents the analysis and implementation of a vector control applied to Doubly-Fed Induction Generators (DFIG) used in grid connected wind turbines. DFIG s are
nowadays the more widely used concept for grid ...
Sistema para aproveitamento de energia vibracional baseados em transdutores acústicos piezelétricos de baixo custo
(Universidade Federal de Santa Maria, 2006-03-08)
This dissertation presents the development of a system for converting the mechanical energy from vibrations into electrical energy. The conversion is performed in a low-cost piezoelectric transducer, commonly known as ...
Metodologia para a análise dos efeitos da geração distribuída sobre as características operacionais dos sistemas de distribuição utilizando técnicas multicriteriais
(Universidade Federal de Santa Maria, 2007-11-08)
Nowadays, the Brazilian electric systems need the development of new researches and tools, in order to obtain a logic solution to maintain and improve the reliability and the quality of the power delivered to customers. ...
Metodologia de projeto de conversores boost para correção de fator de potência apliocada a sistemas ininterruptos de energia
(Universidade Federal de Santa Maria, 2006-04-20)
This Master Thesis presents a design methodology to a boost PFC converter operating as an Uninterruptible Power Supply rectifier input stage. This methodology defines, making use of a group of current ripples and switching ...
Contribuições ao estudo de conexão de geração eólica à rede elétrica
(Universidade Federal de Santa Maria, 2007-08-24)
Distribution systems have not been designed to receive distributed generation (DG) units. The electric energy injection in these systems is safe and reliable if the characteristics regarding of DG interconnection in ...