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Browsing Doutorado em Engenharia Elétrica (Teses) by Title

Browsing Doutorado em Engenharia Elétrica (Teses) by Title

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  • Pereira, Dênis de Castro; http://lattes.cnpq.br/ (Universidade Federal de Juiz de Fora (UFJF)BrasilICE – Instituto de Ciências ExatasPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2019-03-28)
    This work is focused on the theoretical and experimental evaluation of extra-high current (EHC) chip-on-board (COB) light emitting diodes (LEDs), which feature extra-high luminous flux (up to 60 klm). The conception of ...
  • Vieira, Felipe de Alcântara; http://lattes.cnpq.br/5809346528945460 (Universidade Federal de Juiz de Fora (UFJF)BrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2019-02-27)
    This work presents contributions to the voltage security analysis of unbalanced distribution systems, considering multiphase networks, the influence of neutral cables and grounding. Impacts of connecting star or delta ...
  • Oliveira, André Diniz de; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4776383D6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-05-27)
    This thesis proposes two methods to estimate the phasor of the fundamental frequency component. The first one estimates the phasor in the presence of harmonic, decaying DC, and noise. The second one estimates the phasor ...
  • Peralva, Bernardo Sotto-Maior; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4276258H4 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-09-11)
    This thesis presents data processing techniques of signal detection and energy estimation for high energy calorimetry. Modern calorimeters have thousands of readout channels and operate at high event rate conditions. ...
  • Pereira, Luiz Eduardo de Souza; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4426000Y1 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-06-12)
    The analysis of the deterministic power flow is restricted to a single time instant. However, the active and reactive load powers, among others, vary constantly and affect the voltage profiles and line flows throughout ...
  • Valente, Wander Antunes Gaspar; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4734362U1 (Universidade Federal de Juiz de ForaBrasilICH – Instituto de Ciências HumanasPrograma de Pós-graduação em HistóriaUFJF, 2015-02-09)
    This work is based on the method of successive geometric segmentations (SGSM) for the construction of an artificial neural network capable of generating both the network topology as the weight of neurons without specifying ...
  • Oliveira, Thiago Rodrigues; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4484001E1 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-03-24)
    This work outlines initially a methodology to be applied to the characterization of electric power grids for data communication purposes. This methodology englobes all the procedures and required signal processing tools ...
  • Ramos, Tales Pulinho; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4283072U4 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-02-23)
    The National Interconnected Power System (NIPS) presents around 150 hydraulic plants and the medium term planning contemplates between 5 to 10 years of study, the representation of the system to individualized plants ...
  • Rosseti, Gustavo José Santiago; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4422432D8 (Universidade Federal de Juiz de ForaBrasilICE – Instituto de Ciências ExatasPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-08-31)
    This thesis presents a methodology for maximizing the load restoration in power distribution system after simultaneous occurrence of contingency. Therefore, a heuristic constructive algorithm is proposed to determine ...
  • Menezes, Alam Silva; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4739597J6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2014-09-01)
    This dissertation aims at discussing solutions to deal with spectral analysis of stationary and non-stationary processes for frequency estimation, power spectral density estimation and spectral monitoring applications. ...
  • Almeida, Pedro Santos; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4206164D6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2014-12-11)
    This work presents a study regarding the driving of light-emitting diodes (LEDs) fed from mains power. This study involves an analysis of the thermal, electrical and photometrical characteristics of the LEDs, aiming an ...
  • Peres, Wesley; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4419994P7 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2016-03-28)
    Power system stabilizers have been used for decades in order to provide the necessary damping of power system oscillations through generators excitation control. In this thesis, methodologies for stabilizers design (gain ...
  • Rodrigues, Cláudio Roberto Barbosa Simões; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4757197T6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2012-12-17)
    In order to present contributions to the use of light emitting diodes (LEDs) in public lighting systems, covering gaps on the national scenario, this work encompasses abroad analysis related to this issue. Basic concepts ...
  • Amaral, Marcelo Batista do; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785728U6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2012-12-17)
    This work presents a new methodology for static load modeling using direct field measurement procedures and optimization techniques. For this purpose, a new field measurement procedure was developed based on a specific ...
  • Brandi, Rafael Bruno da Silva; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4283072P3 (Universidade Federal de Juiz de ForaBrasilICB – Instituto de Ciências BiológicasPrograma de Pós-graduação em Ciências Biológicas: Imunologia e Doenças Infecto-Parasitárias/Genética e BiotecnologiaUFJF, 2016-02-29)
    The Brazilian National Grid (BNG) presents peculiar characteristics due to its huge territory dimensions and hydro-generation predominancy. As the water inflows to these plants are stochastic and a pluriannual regularization ...
  • Schettino, Bruno Montesano; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4214370U3 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2015-12-08)
    This work proposes a method for detecting the saturation of the current-transformer cores used in the protection of electric power systems and promote the compensation for its effects by correcting the secondary current ...
  • Castro, Cristina Márcia Barros de; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4775099H3 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2012-12-27)
    Aiming to match the long term load demand with a low cost in power generation, it is very important to improve more and more the operation planning of the Brazilian electric sector. The operation planning of medium/long ...
  • Colen, Guilherme Ribeiro; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4426286Z6 (Universidade Federal de Juiz de ForaBrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2016-03-31)
    This dissertation focuses on the computational complexity reduction and on the need for network bandwidth associated with the use of resource allocation techniques in power line communication (PLC) system based on ...
  • Fogli, Gabriel Azevedo; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4470461H1 (Universidade Federal de Juiz de Fora (UFJF)BrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2018-03-26)
    This document presents a study on dispatchable source based on Diesel Gen-set connected to AC microgrid. The Diesel generator is connected to network grid through two-stage converter composed of two Voltage-sourced converters ...
  • Monteiro, Henrique Luis Moreira; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4366279J9 (Universidade Federal de Juiz de Fora (UFJF)BrasilFaculdade de EngenhariaPrograma de Pós-graduação em Engenharia ElétricaUFJF, 2018-04-04)
    This work proposes a method to estimate the power grid impedance in an invasive form, using a disturbance control structure, a filter to eliminate the harmonic components contained in the power grid and an interpolator in ...