On the application of single-phase voltage sag compensators in three-phase systems

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, production losses. This paper reports three year of voltage sag measurements collected in a research lab. This site is located near to many metal industries which lead to a correlation between the obtained results and possible voltage sags in these industries. From the result analysis, propositions of usage of single-phase voltage sag compensators in three-phase systems aiming a cost-effective mitigation are discussed.