Characterization of the sensitivity to power quality disturbances of the synchrotron light source facility Elettra

Among the particle accelerators for scientific applications, the “Synchrotron Light Sources” are fundamental tools of research in a large number of fields. The object of study of this paper is the third-generation Storage Ring-based Synchrotron Light Source (“Elettra”), located in Trieste, Italy. The paper aims at characterizing the sensitivity of Elettra to the power quality (PQ) events by analyzing the disturbances recorded on-site and their effects on the operation of the Storage Ring (SR). More in detail, the first goal of this paper is to identify a voltage dip severity index and a power acceptability curve for Elettra. The second goal is to evaluate the changes of Elettra sensitivity to PQ disturbances over the years, following some significant upgrades to the facility.