A method for the computation of the interruption costs caused by supply voltage dips and outages in small industrial plants

This paper concerns relatively small industrial users, fed at the MV (10-20 kV) distribution level. Recent surveys show that, today, at least one third of these users are sensitive to voltage dips and have significant costs due to supply voltage disturbances and outages, but only some of them are able to quantify these costs with sufficient accuracy. Based on the information got from several Italian small industrial users surveyed by the authors, a pattern for computation of the interruption costs in these plants is developed, with the aim to provide MV users with a reference tool for a correct costs calculation.