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Itens para a visualização no momento 11-20 of 148
Proteção contra perda de excitação em geradores síncronos: uma nova proposta utilizando o método do cálculo contínuo da impedância aparente
(Universidade Federal de Santa Maria, 2015-10-16)
This work presents a new Loss-of-Excitation in synchronous generators protection scheme based on the Continuous Apparent Impedance Calculation. This methodology aiming to improve security and dependability to the ANSI 40 ...
Método de carga para banco de baterias em fontes ininterruptas de energia que busca garantir o estado de carga completa: corrente pulsada modificado
(Universidade Federal de Santa Maria, 2015-02-15)
This Master s Dissertation is proposes the development of a charge management system of a bank of 16 lead-acid batteries with 7Ah load capacity, commonly used in Uninterruptible Power Supplies (UPS). This system aims to ...
Comparação de funções objetivo para seleção de PSS pelo amortecimento de oscilações em sistemas multimáquinas
(Universidade Federal de Santa Maria, 2015-12-15)
Small disturbances occur continuously in electrical systems mainly due to load and generation
variations. This ends up causing low frequency voltage fluctuations that are usually observed
in systems whose lines have weak ...
Caracterização hidrossedimentométrica de uma pequena bacia hidrográfica e balanço sedimentométrico no reservatório do Vacacaí Mirim
(Universidade Federal de Santa Maria, 2015-08-20)
The sediment yield causes a number of problems, and among them stands out silting of rivers and reservoirs, and contamination of surface water. Sediments result from the processes of erosion, transport, storage and ...
Interceptação da chuva em floresta estacional decidual em Santa Maria, RS
(Universidade Federal de Santa Maria, 2015-01-29)
In areas of native forests, interception of rain precipitation trhough the vegetation is an important variable of the water balance. This research analyzed the interception process in two areas of deciduous forest at Santa ...
Disponibilidade hídrica de pequenas bacias hidrográficas na região central do Rio Grande do Sul - indicadores regionais
(Universidade Federal de Santa Maria, 2015-08-31)
The natural water availability in a small hydrographic basin can be represented by its maximum, average and minimum flow. The knowledge of these values has a great importance for a proper planning of shared use and management, ...
Estudo da eficiência energética pneumática no sistema de abertura de portas de veículos de transporte de passageiros "ônibus"
(Universidade Federal de Santa Maria, 2015-03-30)
In pneumatics, the path to greater energy efficiency will careful engineering to configure the solutions based on real needs, the implementation of consistent energy efficiency targets in applications. The aim of this study ...
Dimensionamento e análise de desempenho de um sistema de reaproveitamento de vapor flash proveniente de uma fábrica de farinha e gordura animal para aquecimento de água
(Universidade Federal de Santa Maria, 2015-02-23)
This objective of the work is the project and performance analysis of a recovery system / flash steam generated by meat meal factory . The great demand for animal feed in Brazil caused a great need to look for more efficient ...
Análise de eficiência energética de uma central de microgeração fotovoltaica em um edifício residencial em Santa Rosa - RS
(Universidade Federal de Santa Maria, 2015-02-25)
This paper aims to analyze a power compensation system in the brazilian electric power system through a micro distributed system installed in Santa Rosa - RS. An electric power-saving projection on the grid is performed ...
Desafios e oportunidades dos projetos de energia renovável registrados no primeiro período do protocolo de Quioto
(Universidade Federal de Santa Maria, 2015-07-03)
10 years ago it entered into force global climate agreement Kyoto Protocol, as an attempt to
curb emissions of greenhouse gases (GHG) with the help of three flexibility mechanisms,
including the Clean Development Mechanism ...