Application to an italian distribution system of a multiobjective optimal Volt/VAR control strategy: improvements and management problems

In this paper, the experiences and results deriving from theapplication of a multiobjective optimal managementstrategy to a distribution network supplying an area inprovince of Palermo, Italy, are presented. The adoptedstrategy allows, through the interventions on the UnderLoad Tap Changers (ULTC) of the primary substations andon tie-switches, to reduce power losses and improve thevoltage profiles. To solve the optimization problem, anevolutionary approach has been adopted; it employs fuzzylogic for an adequate and simultaneous fulfilment of thedifferent objectives. The application section presents a deeptechnical and economical analysis of the results attained,applying the optimization algorithm, together with otherinteresting operational solutions.