Surveying PQ aspects in Italian industrial customers

The paper has the objective to identify levels of power quality (PQ) at industrial customers in the various areas of Italian electric system. To this aim, the results of two different questionnaire based surveys performed so far in different Italian Districts have been analyzed in comparison in order to derive general rules and guidelines concerning PQ aspects. The surveys have involved, as a whole, a sample of about 200 industrial customers located in central and northern areas of the country. The surveys have concerned even some aspects relevant to costs of PQ problems. The main results as obtained from either the surveys are reported and discussed.