Análise de qualidade de energia do bloco de laboratórios de computação de uma universidade no Oeste do Paraná

Abstract

The purpose of electrical power quality assessment is to verify whether the electrical quantities of a system are within the limits imposed by the regulation, enabling adjustments in cases where this is necessary, thus providing greater efficiency and reliability to the system. The study in question seeks to select, verify and analyze data related to the electrical quantities used to determine the quality indicators that ANEEL presents in PRODIST. The data were obtained through the PowerNET P-600 equipment, installed at the output of the circuit breaker that supplies the computer laboratory block of a university in west Paraná, in order to identify distortions caused by the heavy computer load. With 3 measurement cycles performed, the PowerMANAGER desktop software was used to transfer the records to the computer, allowing the generation of graphs that show the behavior of the measured quantities. It was thus found that the parameters analyzed met the requirements of the regulation, with the exception of the power factor, which presented several records with values outside the specified limits. However, it does not need to correspond to such limits, since this quantity is only decisive at the connection point of the consumer unit with the energy provider. Another parameter that presented values significantly higher than expected for an electrical system, despite not being determined indicators in the regulation, is the harmonic current distortions, where a good part of the records of total distortion of phase C exceeded the value of 30%. With this, it is concluded that, in view of what is stipulated by the Brazilian standard, the installation analyzed meets the requirements, but that other parameters may indicate improvements to be made in the installation.