A New Optimal Placement of Capacitors and Dispersed Generators using Bacterial Foraging Oriented by Particle Swarm Optimization Algorithm in Distribution Systems

The fixed and switching capacitor banks are widely utilized in distribution systems to possibly reduce reactive power losses and also to improve the voltage profile. In this paper, in order to also reduce the active power losses the dispersed generator (DG) will be used. In this regard, the DG locations will be first determined by means of the voltage index analysis and then the required power to be generated by each DG will be specified using the proposed algorithm given in this paper. The problem solution at different load levels and the utilization of discrete values capacitor are also performed for optimization. Therefore, by applying the multi-objective problem, the optimal placement of these devices and the values of the capacitors are determined based on bacterial foraging (BF) oriented by particle swarm optimization (PSO) algorithm (BF-PSO). The objective function includes the cost reduction of power losses and improving the voltage profile. Finally, the proposed method is compared with genetic algorithm (GA), differential evolution (DE), and PSO methods. They are investigated on the IEEE 69-bus distribution system.