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Itens para a visualização no momento 201-210 of 229
Desenvolvimento de um inversor fotovoltaico trifásico não isolado conectado à rede elétrica
(Universidade Federal de Santa Maria, 2015-03-09)
This Master Thesis presents the development of a grid-connected transformerless
three-phase photovoltaic inverter. The Neutral Point Clamped (NPC) three-level inverter was
chosen for implementation. The grid connection ...
Despacho ótimo de pequenas centrais hidrelétricas para minimização da contratação do suprimento
(Universidade Federal de Santa Maria, 2013-09-13)
This Master s Dissertation presents the development of a methodology to optimize the modulation of dispatch of Small Hydro Power Plants (SHPs). The main objective is to minimize the cost of supplying contracts, which ...
Estudo e desenvolvimento de uma fonte CA de potência híbrida baseada em conversor multinível modular
(Universidade Federal de Santa Maria, 2013-08-30)
This Master Thesis presents an AC Power Source (ACPS) study contribution through the
proposal, design and implementation of a novel hybrid ACPS topology. In general, the
proposed hybrid topology is defined from the series ...
Análise da estabilidade de pequenas centrias hidrelétricas em operação isolada
(Universidade Federal de Santa Maria, 2016-03-21)
Islanding occurs when a part of the electrical system is supplied solely by a unit or group of distributed generators isolated from the main electrical network. When the center of Distributed Generation (DG) operates ...
Desenvolvimento de um sistema de controle e supervisão de inversor para turbinas eólicas
(Universidade Federal de Santa Maria, 2017-01-20)
The worldwide interest in renewable energy has increased, with a large emphasis on wind energy. In this sense, this work presents the supervision and control of an inverter for wind turbines. It uses a three-phase PWM ...
Modelagem de uma curva diária equivalente anual de geração fotovoltaica aplicando em um cenário
(Universidade Federal de Santa Maria, 2019-02-27)
In this study there will be presented an evaluation methodology and scaling of a photovoltaic system with credit compensation. For the validation of the data the computational tool Radiosol 2 was used for the scenery of a ...
Sistema fotovoltaico autônomo utilizando configuração multi-string e inversor multinível
(Universidade Federal de Santa Maria, 2011-08-11)
The continuous economic development of many countries and the emerging environmental
issues (gas emissions and the greenhouse effect) observed in the last decades forced an intense
research in renewable energy sources. ...
Projeto e implementação de um conversor módulo integrado para conexão de geração fotovoltaica à rede elétrica
(Universidade Federal de Santa Maria, 2018-02-27)
This Master Thesis presents the analysis, design and implementation of a grid-connected
module integrated converter, or, simply, microinverter, for photovoltaic applications. The
system is composed of two stages: a ...
Uma metodologia de otimização para sistemas de iluminação que empregam LEDs
(Universidade Federal de Santa Maria, 2015-03-09)
This work presents an optimization methodology for lighting systems that employ LED.
Initially, this work brings a calculation methodology capable of obtaining a thermal resistance
of heat sink from their dimensions of ...
Controle escalar sensorless para sistemas de conversão de energia eólica com gerador síncrono de ímãs permanentes
(Universidade Federal de Santa Maria, 2015-08-21)
This master thesis proposes a control method of scalar direct torque control and
a technique of current control to maximize the aerodynamic efficiency of wind energy
conversion systems (WECS) using permanent magnets ...