Assessment of electric power quality: Indices for identifying disturbing loads

The study aimed at defining parameters capable of assessing, in terms of distortion and unbalance, the quality of the electric power drawn by the customer. Taking as a starting point the advantages and limitations of the methods proposed so far in the literature, two new indices are introduced, useful for quantifying the disturbing characteristics of a load. The efficiency of these indices has been assessed by computer simulations to assess the applicability of the method to three‐wire and four‐wire three‐phase systems in many realistic situations.