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Compostagem de efluente suíno como proposta de tratamento de fármacos de uso veterinário
(Universidade Federal de Santa Maria, 2018-08-09)
The need for a technological solution for the treatment of swine effluents containing veterinary drugs is related to the highlight of the activity in Rio Grande do Sul, with approximately 7 million head. These effluents ...
Fundamentos para concepção, controle e automação de uma planta armazenadora de energia utilizando hidrogênio
(Universidade Federal de Santa Maria, 2017-02-20)
Electrical generation with renewable sources is intermittent due to the characteristics of the primary energy (sun, wind, run of water, etc.). This feature can cause fluctuations and distortions on the voltage levels ...
Controle sem sensores mecânicos para gerador síncrono a ímã permanente
(Universidade Federal de Santa Maria, 2015-07-29)
This Thesis proposes sensorless vector control schemes that combine designed
observers in the discrete-time domain to estimate the rotor position and speed for a
permanent magnet synchronous generator of non-salient ...
Estudo e comparação de sistemas de acionamento para aplicações de alta potência e média tensão
(Universidade Federal de Santa Maria, 2010-08-24)
This Ph.D. Thesis proposes a comparison of modulation techniques, semiconductors devices technologies and topologies for multilevel inverters, in order to point out the multilevel drive system that presents the best ...
Um controlador adaptativo robusto aplicado a conversores estáticos conectados à rede elétrica através de filtro LCL
(Universidade Federal de Santa Maria, 2014-08-26)
This Thesis deals with the development of a novel robust model reference adaptive
controller (RMRAC), in discrete-time applied to grid-connected systems using LCL
filter. This controller uses a modified robust parameters ...
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 ...