Navegando por Autor "TOSTES, Maria Emília de Lima"

Agora exibindo 1 - 6 de 6

Análise dos Impactos Harmônicos em uma Indústria de Manufatura de Eletroeletrônicos Utilizando Árvores de Decisão
(Universidade Federal do Pará, 2015) NOGUEIRA, Rildo de Mendonça; TOSTES, Maria Emília de Lima
Power Quality (PQ) is constantly the subject of studies, especially in the industrial sector, where large loads of electrical systems are concentrated. With the evolution of industrial processes and the introduction of new technologies, electronic equipment that generates disturbances in the systems has been added, affecting the quality of electricity. This work analyzes the harmonic impacts in an electronics manufacturing industry in the Manaus Industrial Pole (PIM), using data mining techniques and decision trees to monitor and diagnose coupling points and processes that present significant harmonic content. The objective is to identify and quantify the levels of harmonic distortions, avoiding regulatory penalties and improving the quality of electrical energy.
Frequency scan on a phase-coordinates frame for unbalanced systems
(INSTITUTO DE TECNOLOGIA, 2012) LEITE, Jandecy Cabral; ABRIL, Ignacio Perez; TOSTES, Maria Emília de Lima; OLIVEIRA, Roberto Célio Limão de; Prof Dr. Walter Barra Junior
This paper presents a method for analyzing unbalanced electric networks using the frequency scan technique in a phase-coordinates frame. The developed model accurately represents unbalanced networks, such as distribution systems with asymmetric transformer banks, single-phase loads, and non-linear elements. The method is implemented in Matlab and tested on a four-wire delta system, demonstrating its effectiveness in identifying resonances and analyzing harmonics.
Melhor aproveitamento da energia elétrica na indústria
(INSTITUTO DE TECNOLOGIA, 2014) SOARES, Gerdson Tanaka; TOSTES, Maria Emília de Lima; SOARES, Thiago Mota; Profª. Drª Aline Maria Meiguins de Lima
This paper presents a proposal for an industrial energy management system focused on low-cost actions, based on measurement, recording, control, and automation. Through a case study in a plastics industry located in the Industrial Pole of Manaus, it was possible to demonstrate energy savings of up to 35.5%, using the Measurement and Verification (M&V) methodology. The study highlights the importance of integrated management as a tool for energy efficiency, with positive impacts on productivity, cost, and sustainability.
Naive Bayes aplicados en el análisis de impactos armónicos en los sistemas eléctricos industriales
(INSTITUTO DE TECNOLOGIA, 2015) SILVA, Waterloo Ferreira da; NOGUEIRA, Rildo de Mendonça; OLIVEIRA, Edson Farias de; SANTANA, Ádamo L.; TOSTES, Maria Emília de Lima; SOARES, Thiago Mota; Prof Dr. Walter Barra Junior
This paper presents an analysis of harmonic current impacts in an industrial facility in the Manaus Industrial Zone using Naive Bayes classification, a data mining technique. The study measures total harmonic distortion (THDv) and identifies which production processes contribute most to power quality issues, particularly due to non-linear loads like switch-mode power supplies. The methodology includes power quality measurements and statistical analysis with dedicated software.
Processamento Primário da Informação Gerada por Registradores de Perturbações
(INSTITUTO DE TECNOLOGIA, 2014) AZEVEDO, Manoel Socorro Santos; HORTA, Roberto Luis Ballesteros; LEITE, Jandecy Cabral; BEZERRA, Ubiratan Holanda; TOSTES, Maria Emília de Lima; MAGALHÃES, Edilson Marques
The study focuses on the primary processing of data generated by Digital Fault Recorders (DFRs) in electrical systems, aiming to streamline the analysis of oscillographic records for operators and specialists. Using LabVIEW and the COMTRADE standard, a modular software was developed for data acquisition, processing, storage, and interactive visualization. The system enables quick disturbance searches and lays the groundwork for implementing computational intelligence (CI) techniques to aid decision-making.
Sistema de Gerenciamento de Energia como Ferramenta de Eficiência Energética na Indústria
(Universidade Federal do Pará, 2015) SOARES, Gerdson Tanaka; TOSTES, Maria Emília de Lima
This work proposes a methodology for energy management as a tool for Energy Efficiency in Industry, focusing on energy consumption in the production process. The methodology includes the implementation of metering, control, and diagnostic devices to optimize the use of electrical energy. The study presents results of a proposed system in a plastic products industry, using the measurement and verification (M&V) methodology to assess the energy savings achieved after implementing energy efficiency measures.