Power quality indices of distribution networks. Definitions and evaluation

The electric power quality will always be in the focus of interest of electrical engineers involved in the planning and exploitation of distribution electrical networks (DEN). There is a need for defining a system of numerical indices of quality (IQ) for delivered electrical energy, as a fundamental "product" or "service", by which the quality of a distribution network can be evaluated. The topic of this paper is a definition of a set of indices of power quality and the description of a software tool for their evaluation. By establishing a unique system of numerical indices of quality and the software tools for their evaluation, it is possible to evaluate both operation quality and alternative projects quality in the course of the network development planning process.