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Itens para a visualização no momento 131-138 of 138
Metodologia para geração e uso de energia elétrica de fontes renováveis com foco em tecnologias disruptivas e valores socioculturais locais
(Universidade Federal de Santa Maria, 2018-08-24)
This thesis was carried out with the purpose of creating a methodology to define the composition of the local energy use and to generate electric energy through the complementarity of the sources of renewable energies, ...
Estimação da seção em falta e processamento de alarmes em sistemas de potência utilizando um sistema híbrido fundamentado na heurística construtiva e na programação inteira
(Universidade Federal de Santa Maria, 2012-09-21)
This work proposes a methodology which is able to accomplish alarms processing and to
estimate fault section in electrical power systems. The purpose is to filter alarms generated
during a shutdown and indicate which ...
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 ...
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 ...
Sistemas eletrônicos para iluminação de exteriores empregando diodos emissores de luz (LEDs) alimentados pela rede elétrica e por baterias
(Universidade Federal de Santa Maria, 2012-11-30)
This work presents a design methodology and analysis of electronic circuits applied to
outdoor lighting systems using light emitting diodes (LEDs). The goal of topologies developed
here is to supply the LEDs from the ...
Gerador de indução com excitação estática, filtro ativo e armazenamento de energia para sistemas eólicos isolados
(Universidade Federal de Santa Maria, 2013-03-01)
The growing global demand for electricity, increasing scarcity of the conventional
energy sources and the need to reduce environmental impacts contributed to the pronounced
development of new technologies based on clean ...
Sistemas eletrônicos de iluminação baseados nos conversores CA/CA
(Universidade Federal de Santa Maria, 2011-08-23)
This thesis proposes to improve the efficiency of public illumination systems by means of AC chopper based power converters. A comparative study of high performance AC/AC converters feeding high pressure sodium lamps on ...
Processos adsortivos aplicados à desfluoretação de água subterrânea para abastecimento humano
(Universidade Federal de Santa Maria, 2019-04-26)
Fluoride (Fˉ) is an element that is commonly present in groundwater, and that in excessive
concentrations may make it unfit for consumption. Contamination of groundwater by fluoride
ions may occur through natural processes ...