Reference power network for the harmonic propagation analysis

The paper presents the theoretical and experimental work carried out to define a "reference power network" to study the phenomena of harmonic propagation. This means a network which firstly presents- as a consequence of the presence of a resonance frequency- critical behaviour from the point of view of the correct representation of the components, and secondly is defined through measurements and from investigations among the consumers, in such a way that it might be used for subsequent calculations and surveys pertaining to the models of the various components. The measurements have been carried out with non invasive techniques by using a source of harmonics (AC/DC railway conversion substation) allowing disturbances, controllable in amplitude, to be injected over a programmable period of time. By the end of the investigation the simulation analysis had identified the elements of arbitrariness and the limits of the actual modelling, thus pointing out some possible lines of research to be developed in this area.