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Modelo de gerenciamento para as micro e pequenas empresas da região central do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2006-02-13)
The success of MPE's (small companies) are intimately linked to the success of the national economy, and it is one of the determinant variables of the maintenance and the growth of a country. In that context, it was noticed ...
Método de sincronização aplicado a conversores PWM trifásicos
(Universidade Federal de Santa Maria, 2006-07-17)
In the last decade, disturbances in the electrical system have been increased, mainly due to proliferation of nonlinear loads. As a result harmonic distortion, voltage unbalance and frequency variations are becoming a ...
Desenvolvimento e implementação de uma micro-rede avançada de alta freqüência para integração de fontes alternativas de energia
(Universidade Federal de Santa Maria, 2006-03-17)
This Thesis presents a distributed generation system, which works as a Microgrid, suitable to integrate alternative energy sources, using a high frequency AC link (HFAC) as a means of connecting sources and loads. The ...
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 ...
Avaliação da habitação de interesse social na cidade de São Gabriel
(Universidade Federal de Santa Maria, 2006-12-15)
The present work aims at analyzing the development f conjuntos habitacionais of social interest built in the city of São Gabriel, R/S, through the methodology of post occupation assessment, APO , including the elaboration ...
Novos métodos para reconfiguração das redes de distribuição a partir de algoritmos de tomadas de decisão multicriteriais
(Universidade Federal de Santa Maria, 2007-12-14)
The electric networks reconfiguration has as purpose: to reduce the energy losses, to improve the voltage profile for the customers, to increase the reliability levels or to re-establish the energy supply in contingency ...
Microestrutura do cobrimento de concretos com altos teores de escória e cinza volante ativadas por cimento portland e cal hidratada
(Universidade Federal de Santa Maria, 2007-03-08)
In the history of the concrete structures there was a time in which the mechanical resistance was the most important property for the designers. However due to amount of pathologies in the concrete structures and your ...
Análise dos parâmetros do modelo SWMM para avaliação do escoamento em duas bacias periurbanas em Santa Maria - RS
(Universidade Federal de Santa Maria, 2007-03-14)
The objective of this research was to evaluate SWMM model for the urban drainage basins Alto da Colina and Sítio do Tio Pedro at Santa Maria-RS, through the variation of the parameters involved in the calibration, searching ...
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. ...