Abstract
This article presents the influence of the load level variation in the power quality. The study it is based on a punctual audit, made to a group of loads in a cement industry, with experimental data acquired by monitoring equipment. Quality indexes of Power Energy Industrial System are determined for different points of the network, such as points of common coupling, disturbing load points, linear load points and reactive energy compensation points. The monitored data are analyzed, according to the patterns of the IEEE 519-1992 standard. Using audit results along with system data, a Power Energy Industrial System simulation model is developed in MATLAB/SIMULINK. This model is then used to extrapolate the Harmonic Distortion Propagation at the industry plant, for other load levels apart from the monitored ones. The information related to Harmonic Distortion Propagation for different load levels is used to strengthen the conclusions of Power Energy Industrial System audits.
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