Analysis of regularities between voltage sags in a sequence of events gathered in distribution networks

In this paper, sequences of events related with faults occurred in power distribution networks and recorded by power quality monitors at substations are analysed. The aim is to find automatically relationships among events, looking for meaningful patterns. Once those patterns are found, they can be used to better describe fault situations and their temporal evolution or can be also useful to predict future failures by recognising the events that match the early stages of a pattern.