Placement of Distributed Generation Unit and Capacitor Allocation in Distribution Systems Using PSO Algorithm and Bat Algorithm

With regard to the increasing development of the distribution systems and their importance in the electrical network, minimizing the losses and costs of these systems should be considered. In this study, using the PSO and BAT algorithms for the capacitor and DG placement and finding size, the most appropriate voltage profile is created in the buses and the current costs and losses of capacitor and DG are minimized compared to the time before capacitor and DG placement. The solution for these two methods is divided into two parts: first part, sensitivity factor of the losses is used for optimal placement of the capacitor and DG and in the second part, BAT and PSO algorithms are used for determining the seiz of the capacitor anf optimal DG and the obtained results are compared. The objective function which has three important indices (active and reactive power losses and voltage profile) is minimized using bat and pso algorithm. Power flow is done using The Newton-Raphson method and simulation is carried out on a 34 bus test system. Placement of DGs and capacitors are done simultaneously in the test system.