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Optimal Performance Enhancement of Capacitor in Radial Distribution System Using Fuzzy and HSA

This paper presents a new two-stage methodology using the fuzzy and advanced Harmony search algorithm (HSA) for the placement of optimal capacitors on the primary feeders of the radial distribution systems with an objective to reduce the power losses and to improve the voltage profile. In the first stage, fuzzy approach is used to find the optimal capacitor locations and in the second stage, An advanced Harmony search algorithm is used to find the optimal sizes of the capacitors in the optimal capacitor locations identified by using the fuzzy approach. The proposed method is tested on 15-bus, 33-bus, 34-bus and 69-bus test systems and the results are presented.