Abstract
Voltage sag is one of the most frequent power quality problems found in industries and power system. Its effects can be numerous such as control equipment trips, process shutdown, and production losses. This paper reports three years of voltage sag measurements collected in a research lab. This site is located near many metal industries which lead to a correlation between the obtained results and possible voltage sags in these industries. From the resulting analysis, this paper proposes the usage of single-phase voltage sag compensators in three-phase systems aiming a cost-effective solution. This procedure would not wholly eliminate the voltage sag incidence but it would diminish voltage sag effects on electrical loads.
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