Navegando por Assunto "Qualidade da energia elétrica"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Análise da qualidade da tensão no ponto de conexão de uma fábrica de alumínio com o sistema interligado nacional
(Universidade Federal do Pará, 2009-09-09) MANITO, Allan Rodrigo Arrifano; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
In this work, it is presented an analysis of the voltage quality at the Point of Common Coupling (PCC) of an aluminum industry plant with the national grid in order to evaluate the impact of this facility in the grid regarding the voltage fluctuation, voltage unbalance and voltage harmonic distortion. The data of the power quality disturbances cited above were collected through a measurement campaign over a period of 7 consecutive days, as requested by the National Electric System Operator (ONS) for cases of loads connected to the grid which have nonlinear characteristics, such as aluminum plants. Additionally, a computational study to determine the maximum values of voltage harmonic distortion at the PCC is presented in order to complete the analysis made by the measurement campaign. The computational programs used for the study were the HarmZs of CEPEL and Matlab 7.0.
Acesso aberto (Open Access)
Monitoração e análise de grandezas da qualidade da energia elétrica em processos industriais utilizando instrumentação virtual
(Universidade Federal do Pará, 2011-02-28) SANTOS, Michele de Nazaré Novaes; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
This work aims to develop a data acquisition system of driving electric loads in the industrial process of automated network system based on virtual instrumentation, enabling the monitoring and analysis of disturbances related to steady state Power Quality(PQ), such as voltage variations, harmonic distortion and voltage unbalance, where the results can be viewed on a friendly and intuitive interface to the user and stored conveniently in a database. This system is a viable solution due to have low cost in its implementation and to be flexible for monitoring and analyzing parameters of PQ in industrial processes when compared with traditional instrumentation.