The Influence of PQ-Monitor Connection on Voltage Dip Measurements

Paper in proceeding, 2004

This work addresses the influence of PQ monitor connection on the estimation of site and system voltage dip indices. It also presents the relation between sag magnitudes for phase-to-neutral and phase-to-phase monitoring. Stochastic assessment of voltage dips is used to generate fault caused events from which indices for both phase-to-neutral and phase-to-phase voltage sags are calculated. Results for one-year power quality monitoring program in a sensitive manufacturing process are also presented. Results considering the two monitor connections are analyzed.