A5071714053- Lightning and Electromagnetic Phenomena
- Thermal Analysis in Power Transmission
- High voltage insulation and dielectric phenomena
- Power Line Communications and Noise
- Electromagnetic Compatibility and Noise Suppression
- Soil Management and Crop Yield
- Information Science and Libraries
- Power Systems Fault Detection
- Public Health in Brazil
- Health, Nursing, Elderly Care
- Education Pedagogy and Practices
- Youth, Drugs, and Violence
- Millimeter-Wave Propagation and Modeling
- Advancements in PLL and VCO Technologies
- Education and Digital Technologies
- Information Architecture and Usability
- Plasma Applications and Diagnostics
- Electrical Fault Detection and Protection
Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais
2018-2020
Universidade Federal de Minas Gerais
2015-2019
Serviço Nacional de Aprendizagem Comercial
2010
Universidade Federal do Rio de Janeiro
2010
Este manuscrito tem como objetivo investigar os discentes de cursos técnicos integrados ofertados pela rede federal ensino percebem o processo ensino, a avaliação da aprendizagem e atuação docente dentro seus cursos. Para isso, desenvolveu-se uma pesquisa empírica caráter quali-quantitativa, por meio aplicação um questionário, com do IFMG matriculados nos terceiros anos quatro dois campi diferentes. Constatou-se que avaliam, em média, mais difíceis conteúdos das disciplinas técnicas básicas....
This paper presents preliminary results related to the impulse breakdown characteristics of XLPE-covered cables. Tests with standard lightning voltages (1.2/50 μs) applied a typical single-phase structure employed in compact distribution lines used Brazil were performed. Results terms voltage, time and pinhole location are presented.
This paper investigates the influence of XLPE-covered cables on impulse withstand voltage a typical structure used in single-phase compact distribution lines Brazil. For comparison purposes, two different procedures are adopted for estimating this under standard positive lightning impulses. One considers bare cable and other assumes XPLE-covered cable. analysis considering cable, up-and-down method is determining critical flashover overvoltage (CFO) structure. The corresponding Vxt curve...
This paper presents a theoretical study on the influence of multi-grounded neutral transmission narrowband power-line communication (PLC) signals through two-wire medium-voltage distribution line. Three different methods are proposed to calculate transfer function line in 3-500 kHz range: (i) nodal admittance method; (ii) travelling wave (iii) electrically-short approach. The validity, advantages and shortcomings each method presented discussed. It is shown that improving grounding impedance...
Results of experiments performed with positive and negative standard lightning impulse voltages to determine breakdown voltage values pinhole location on XLPE- HDPE-covered cables used in compact distribution lines Brazil are presented. It is shown that present a better performance terms the resulting withstand voltage. Also, damages HDPE covered due processes occur wider range along cable length compared ones observed XLPE cables.
This paper presents a comparison of two statistical methodologies that can be used to derive lightning withstand parameters from high-voltage laboratory tests performed on self-restoring insulation. These are determine the 10%, 50%, and 90% probabilities insulation breakdown associated with three-phase structure in compact distribution lines Brazil. In tests, bare cables were assumed order simulate critical case which XLPE insulating layer cable is completely deteriorated. It shown...
Este trabalho tem como objetivo determinar o numero de desligamentos em 100 km linha por ano devido a tensoes induzidas descargas atmosfericas indiretas, considerando as estruturas basicas da rede distribuicao compacta com cabos nus. A utilizacao nus visa descrever situacao critica operacao que se supoe cobertura isolante dos fase esteja completamente deteriorada. suportabilidade das avaliadas e determinada partir testes realizados laboratorio. Utilizando um modelo calculo simplificado,...
Esse projeto pretende, a partir do contedo da pesquisa Pioneiros Moderno Design Brasileiro, desenvolver um site adaptativo, fim de melhor atender seu pblico, facilitando sua aprendizagem e otimizando o processo usurio. Esta refere-se ao trabalho, em desenvolvimento, Guilherme Cunha Lima, no qual relatada histria design brasileiro perodo moderno. Para tal, divide os designers trs grupos: precursores, pioneiros contemporneos, segundo uma ordem cronolgica. No site, ser abordado dos pioneiros....
This paper is dedicated to estimating the data transmission rate of a single-phase line. For this, bottom-up approach used. In this approach, line model used estimate channel capacity considering earth-return impedance equations Carson and Sunde. Different soil characteristics lines different lengths were considered. It verified that for 5-km long ground resistivity 1000 Ωm higher than 2 7 Mbps frequency ranges 3-148.5 kHz 3-500 kHz, respectively.
This paper is dedicated to compare the impulse withstand voltage parameters of three-phase and single-phase compact distribution line structures assuming use bare cables. Three-phase lines are common in urban environments, while more rural environments. The cables tests aims at investigating critical case which insulating layer cable completely deteriorated. It shown this that tested have a lower than structures. In addition, it polymeric spacers greater pin-type insulators.
Este trabalho tem como objetivo avaliar a atenuacao de um sinal comunicacao que se propaga atraves canal PLC. Para isso e utilizada abordagem bottom-up, baseia na modelagem fisica do PLC utilizando teoria linhas transmissao. As aproximacoes Nakagawa D'Amore Sarto, consideram admitância associada solo condutor imperfeito para o calculo dos parâmetros linha, sao testadas comparadas. Percebe-se prevista por essas formulacoes uma reducao partir frequencia critica, posto as ondas eletromagneticas...