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Avaliação da segurança da operação de sistemas elétricos de potência considerando os limites de estabilidade angular e de tensão
(Universidade Federal de Santa Maria, 2008-02-22)
This work presents new analytical and computational methods for operation security assessment of electric power systems by considering Angle and Voltage Stability Limits. In the context of Angle Stability, it was developed ...
Inversores ZCZVT com acoplamento magnético: síntese e análise
(Universidade Federal de Santa Maria, 2008-03-10)
This Ph. D. Thesis presents a in deep study of the mechanism of resonant transition soft-switching techniques. By means of the principles that rules the PWM resonant transition converters, a novel tool for analysis and ...
Desenvolvimento de uma família de reatores eletrônicos para lâmpadas fluorescentes sem eletrodos empregando a técnica de integração de conversores
(Universidade Federal de Santa Maria, 2012-11-30)
This paper presents the design and development of an electronic ballasts family
obtained through the use of the integration technique of converters for feeding the
electrodeless fluorescents lamps (EFL). This type of lamp ...
Caracterização física e biológica do solo após aplicação de herbicidas em plantios de acácia-negra (Acacia mearnsii De Wild.) no Rio Grande do Sul
(Universidade Federal de Santa Maria, 2008-01-25)
The study of soil quality biological indicators in areas classified as forest production units is important to understand the ecological processes that occur in these systems. Monitoring the soil fauna in modified environments, ...
Novo conversor CC-CC integrado full-bridge-forward aplicado a uma microrrede residencial
(Universidade Federal de Santa Maria, 2013-02-07)
This Ph.D. Dissertation focuses on the proposal of a novel converter topology applied
to the connection of an energy storage system, composed of a supercapacitor bank and a
battery bank, to the dc bus of a residential ...
Projeto de conversores estáticos fazendo uso de uma metodologia de minimização de volume/perdas/custo
(Universidade Federal de Santa Maria, 2013-08-29)
This thesis presents a new optimization design methodology for power electronics
converters with volume, cost and efficiency objectives. The optimization methodology,
achieved by mathematical interactions, is based on the ...
Algoritmo de localização de nodos para redes de sensores móveis
(Universidade Federal de Santa Maria, 2009-12-21)
This thesis presents contributions to node localization in mobile sensor networks. Considering the importance of localization algorithms in identifying the location of an
event in order to better determine the action to ...
Utilização de conversores eletrônicos que alimentam leds de alto brilho na aplicação em tecido humano e sua interação terapêutica
(Universidade Federal de Santa Maria, 2009-08-31)
This paper presents a study on the application of high-brightness LED (Light Emitting Diode)to health care. The LEDs are supplied by electronic converters, proposed in order to analyze the light emitted by the LEDs and ...
Processamento de sinais analógicos amostrados utilizando técnicas de chaveamento a capacitor e a corrente aplicados à conversão AD sigma delta
(Universidade Federal de Santa Maria, 2009-08-27)
Circuits for sampling and retention of analogue signals are commonly implemented with techniques such as switched capacitors (SC). SC circuits employing the storage of charge in a linear capacitor to represent a signal in ...
Utilização avançada da capacidade excedente de sistemas de transmissão CCAT para produção de oxigênio e hidrogênio
(Universidade Federal de Santa Maria, 2008-04-02)
This PhD thesis discusses the use of the power plant capacity in HVDC transmission systems during inactive periods of the main converters to feed local loads, aiming at a better AC power quality and DC transmission. The ...