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Análise e projeto de conversores estáticos para sistemas fotovoltaicos parcialmente sombreados
(Universidade Federal de Santa Maria, 2016-08-29)
This work presents a study and analysis of photovoltaic systems subject to partial
shading, where the main consequence is the reduction of its energy production. To mitigate
this problem, it is proposed a new photovoltaic ...
Problemas de roteamento de veículos com dependência temporal e espacial entre rotas de equipes de campo
(Universidade Federal de Santa Maria, 2016-08-26)
This thesis presents two new routing problems, both with objective functions focused on
relative positioning of teams during the routing horizon. The relative positioning results in
temporal and spatial dependencies among ...
Processador inteligente de alarmes e modelos de programação matemática para diagnóstico de faltas em sistemas elétricos de potência
(Universidade Federal de Santa Maria, 2016-06-24)
This thesis proposes an Intelligent Alarm Processor for fault diagnosis in electrical power systems. The objective is to develop a methodology for automatic fault analysis using reported alarms from Supervisory Control and ...
Topologia híbrida e métodos de controle aplicados à regulação de tensão de geradores de indução auto-excitados
(Universidade Federal de Santa Maria, 2016-05-23)
This doctoral thesis deals with the study, analysis and development of a new hybrid
topology for voltage regulation of stand-alone microgeneration systems employing
self-excited induction generators. The hybrid topology ...
Detecção de ilhamento em sistemas de distribuição com geração síncrona distribuída
(Universidade Federal de Santa Maria, 2016-02-26)
Nowadays due to the increase of renewable energy sources, Distributed Generations (DGs) assumed an important role in distribution and sub transmission systems. However, abnormal operating conditions of the distribution ...
Intervalos de predição no modelo beta autorregressivo de médias móveis
(Universidade Federal de Santa Maria, 2016-02-25)
Usual point and interval forecasting based on the autoregressive integrated moving average
models (ARIMA) may not be suitable for modelling variables defined over the interval
(0, 1). In fact, such forecasting effect ...
Gráficos de controle para dados do tipo taxas e proporções autocorrelacionados
(Universidade Federal de Santa Maria, 2016-03-28)
This work discusses one of the areas for quality improvement, defined as statistical process
control (SPC). One of the most used tools in SPC is the control chart, which is used to
monitor parameters of a process. In ...
Impactos operacionais da complementariedade de fontes de geração solar fotovoltaica e a biogás em sistemas de distribuição
(Universidade Federal de Santa Maria, 2016-03-04)
The current scenario of micro and mini distributed generation (micro and mini DG) in Brazil has been developing steadily and the power injection through the Distributed Generation (DG) regarding the development of small-scale ...
Inversor fotovoltaico não isolado NPC intercalado
(Universidade Federal de Santa Maria, 2016-03-04)
Throughout the twentieth century, the supply of electricity, mainly obtained from
fossil fuels like oil and coal, it has supported the growth and transformation of the world
economy. In the early years of this century, the ...
Análise da viabilidade técnica da operação de sistemas com geração distribuída no modo ilhado intencional
(Universidade Federal de Santa Maria, 2016-03-22)
The increasing demand for energy, coupled with the difficulties inherent in the
implementation of large generation projects, significantly increased the use of energy
resources from renewable energy sources, in order to ...