Analysis of Event Sequences in Power Distribution Systems

Abstract

In   this   paper, events   registered   in   power distribution  systems  are  analyzed to  recognize  sequences  of events  associated  to  faults  occurred  in  the  network.  The  events considered in this study are basically voltage sags generated by homopolar  faults  and  registered  by  power  quality  monitors installed   in   the   secondary   of   transformers   in   distribution substations.  The  events  registered  in  a  measuring  point  have associated  the  time  of  occurrence,  and  the  list  of  increasing-time ordered events corresponds to a sequence.   The aim of this work  is  to  discover the  collection  of  events  associated  with failures  in  the  network  that  can  be  viewed  as  sequences  of events related with the actuation of the protection system.  Twoalgorithms  are proposed to recognize  these sequences.  The methodology    is    tested    with    data gathered    in    different substations which have been manual grouped by the utility1.