A power quality study on the Italian electric grid: statistical analysis of the voltage dips and compensation strategies

This study presents a power quality study on the Italian Electric Grid. The most probable voltage sags, in terms of number and duration, have been identified thank to a statistical analysis, based on a yearly survey (2012). In particular, four zones have been considering (North, Central, Central-South and South) in order to represent the whole Italian situation. This data have been used to define a suitable system that can compensate many power quality problems. The study proposes a Dynamic Voltage Restorer (DVR) as compensation device where a sensible load is connected. A model realized in SIMULINK environment of the network is presented and many simulations are performed in order to indicate the right compensation strategy.