Cluster analisis of long-term power quality data

Current methods for measurement and analysis of power quality is based on the selection of a representative period of time, usually a week, corresponding to normal operating conditions. However such conditions as variability of load and generation or changing the configuration of power system network may have a significant impact on the quality parameters of power system. In order to distinguish and perform comparative assessment of different states of the power system condition in terms of power quality parameters it is possible to use cluster analysis. This paper presents the results of the use of cluster analysis of long-term power data quality electricity recorded synchronously in selected fields of distribution substation 110/20/10kV.