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Itens para a visualização no momento 31-40 of 294
Método para detecção de oscilação de potência no domínio do tempo
(Universidade Federal de Santa Maria, 2018-03-09)
This work proposes two techniques for the detection of power swings and blocking of distance
relays on transmission lines to prevent undue shutdowns. If a fault occurs during power swing,
it must be immediately detected ...
Aumento da eficiência total de armazenadores de energia compostos por eletrolisadores, células a combustível e hidretos metálicos
(Universidade Federal de Santa Maria, 2018-03-26)
The growing global energy consumption, the search for reduction in carbon emissions and
climate problems highlight the importance of investment in low environmental impact energy
systems. In this sense, the Generation ...
Paradigmas da participação pública: uma análise da efetividade dos comitês de bacia do RS por meio da proposição de indicadores de desempenho
(Universidade Federal de Santa Maria, 2018-09-04)
The increase in environmental degradation, as well as its consequent control in the quality and quantity of water, leads to the search for efficient management, which aims at sustainable development. Increasingly, society ...
Redução de micropoluentes por sistema de tanque séptico e wetland construído vertical com recirculação
(Universidade Federal de Santa Maria, 2018-09-17)
Constructed wetlands are well-established systems known worldwide for the treatment of domestic effluents. In Brazil they are still little used, and in-depth studies are needed on the removal of carbonaceous and nitrogenous ...
Sistema de comunicação e controle para múltiplos conversores aplicados em transformador de estado sólido
(Universidade Federal de Santa Maria, 2017-09-05)
This PhD Dissertation proposes a communication and control structure for multiple
converters systems, with emphasis on modular structures applied in solid state transformers
(SST) with three power stages. The SST under ...
Estudo da rigidez, da deformação permanente e da fadiga de misturas asfálticas com ligantes convencionais e modificados
(Universidade Federal de Santa Maria, 2018-11-22)
In Brazil, there are two most recurrent defects found on highways: permanent deformation and cracking due to fatigue. Among the most varied causes, the formation and propagation of cracks in the asphalt coating occurs as ...
Determinação de arranjos regulatórios e econômicos para viabilizar investimentos em sistemas de armazenamento de energia em redes de distribuição de energia elétrica
(Universidade Federal de Santa Maria, 2018-12-17)
In this work, it is presented a methodology for analyzing the insertion of energy
storage systems in electric energy distribution networks. This methodology consists
of modeling the current regulatory policy with its ...
Inversores fotovoltaicos trifásicos não isolados conectados à rede com técnicas para redução da corrente de fuga
(Universidade Federal de Santa Maria, 2018-12-18)
This doctoral dissertation presents contributions related to transformerless grid-connected
three-phase photovoltaic systems, focusing on the leakage current reduction. Among the
leakage current reduction techniques, the ...
Projeto e implementação de uma lâmpada led bulbo em conformidade com aspectos elétricos, térmicos e ópticos exigidos pelas normativas brasileiras
(Universidade Federal de Santa Maria, 2018-08-31)
This work presents an LED bulb lamp conception aiming to replace traditional lighting technologies such as incandescent and compact fluorescent lamps. The LED lamp manufacture and sale requirements based on INMETRO Ordinance ...
Priorização da manutenção em subestações com foco na confiabilidade e na remuneração da função transmissão
(Universidade Federal de Santa Maria, 2016-11-21)
Transmission companies, in Brazilian electricity sector, are paid by the facilities available to the National Interconnected System - SIN. The different equipment on the transmission system are subject to the occurrence ...