Innovative optimal switching scheduling of capacitor banks using local data for global loss minimization–A case study in medium voltage network of IRAN

The most important issue in power system designing and operating is minimizing losses and costs. Unlike existing methods which use a large amount of data across the entire network to determine optimal dispatch of shunt capacitors, this paper describes a method for optimal switching of capacitors in subtransmision substations only by using local data including voltage magnitude on 20kV and 63kV busbars, outgoing/incoming reactive powers on 63kV lines, and reactive load of 20kV side of subtransmision transformer. The simulations are carried out for Alborz Province MV network in IRAN using DIgSILENT 2018. Simulation results show an acceptable accuracy to minimize power loss in 63kV network.