Technical methods for the prevention and correction of voltage sags and short interruptions inside the industrial plants and in the distribution networks

Abstract

The main objective of this paper consists on showing the results of the final career project made in the Industrial Engineering University of Vigo and with the cooperation of a Spanish electric distribution company (Unión Fenosa), to study voltage sags and short interruptions. First, a review about some of the methods that can be applied in an industrial installation to get a satisfactory operation in any electromagnetic environment with the presence of voltage sags or short interruptions will be showed in an abridged way. Moreover, a voltage sags and short interruptions measures analysis was also made, using a series of samples registered by a distribution utility in different places along the geography of Galicia, between the years 1999 and 2002, to characterize this events, as well as search and guess the future tendencies to improve power quality in the distribution networks and, finally, establish the corresponding conclusions.