Ranking of sites based on voltage sag severity

In the field of power quality (PQ), characterizing and quantifying the disturbances by means of indices represent a key activity of electrical energy market. Traditional PQ indices, such as voltage and current total harmonic distortion, Unbalance and SARFI, separately analyze PQ disturbances, In some cases, instantaneous values of voltage, which contemporaneously include all disturbances, can be the main cause of failure or malfunction of electrical components. A single index allows internal and external benchmarking and easily quantifies the respect of items inside power quality contracts. This paper introduces a proposed matrix method considering voltage dip/sag indices relevant to a site so that a comprehensive ranking of the sites could be made.