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Itens para a visualização no momento 81-90 of 100
Gerenciamento da climatização de células a combustível do tipo PEM para integração com a rede de energia elétrica visando à eficiência energética
(Universidade Federal de Santa Maria, 2010-03-29)
Fuel cells (FCs) offer a friendly environmental way to generate energy. Specifically, these
devices require only a fuel (generally, hydrogen) and an oxidizer (pure oxygen or air) to
produce electricity, water and heat. ...
Análise, projeto e implementação de um arranjo flexível de conversores estáticos para sistemas de conversão de energia eólica conectados à rede
(Universidade Federal de Santa Maria, 2013-07-29)
This Thesis deals with the analysis, design and implementation of a flexible arrangement
of static converters for grid connected Wind Energy Conversion Systems (WECS). The
main features of the proposed flexible arrangement ...
Análise e controle de aerogeradores com conversor pleno durante afundamentos de tensão
(Universidade Federal de Santa Maria, 2012-09-28)
This thesis addresses the main issues regarding the operation of full power converters
wind turbines connected to the grid under balanced and unbalanced voltage sags.
In the past, the grid codes allowed wind turbines to ...
Compensação das formas de onda distorcidas pela saturação de transformadores de corrente com auxílio da estimação de frequência
(Universidade Federal de Santa Maria, 2015-03-02)
This work presents innovative methods for detection and correction of the distorted portions of the secondary current waveforms, which occur due to the core saturation of current transformers (CTs). The detection technique ...
Co-projeto de perspectiva completa para conversores CC-CC com controlador digital
(Universidade Federal de Santa Maria, 2017-03-20)
Cyber-physical systems performance are dependents of cyber and physical domains. This work
applied a cyber-physical approach in digitally controlled power converter. This thesis proposes
a new full perspective co-design ...
Estratégias de modulação para conversores multiníveis com capacitores flutuantes
(Universidade Federal de Santa Maria, 2019-01-30)
This Thesis contributes to the modulation of the multi-level three-phase converter with
flying capacitors, for which simulations were performed to validate three different
modulation algorithms. The first one is a phase ...
Aproveitamento da energia geotérmica superficial para aumentar a eficiência de condicionadores de ar e reduzir o pico de demanda
(Universidade Federal de Santa Maria, 2018-09-12)
This doctoral thesis is a contribution to reduce the electric load in thermal conditioning of residences in order to mitigate its influence on the duck curve. It is proposed the use of air conditioning units driven by ...
Metodologia para detecção e classificação de faltas em transformadores de potência por meio da Transformada Wavelet Discreta
(Universidade Federal de Santa Maria, 2018-08-28)
This thesis presents the development of a methodology for the detection and
classification of electrical transients in power transformers, for protection purposes. For this,
we analyzed several electrical transients ...
Reconfiguração automáticas das redes de distribuição de energia elétrica com monitoramento em tempo real
(Universidade Federal de Santa Maria, 2013-09-13)
In normal operation, the reconfiguration of distribution network can reduce losses,
balance loads and improve quality indicators. The increasing use of remote controlled
equipment in power systems leads the development ...
Fontes CA de potência: contribuição ao estudo e ao desenvolvimento de topologias híbridas
(Universidade Federal de Santa Maria, 2012-12-20)
In this thesis an study of AC Power Source (ACPS) topologies that guarantee the synthesis
of high quality voltage waveforms (in comparison to the reference signal) without
penalizing the system efficiency is carried out. ...