Placement of distributed generators for loss minimization and voltage improvement using particle swarm optimization

In this paper the integration of Distributed Generation (DG) in radial distribution system is investigated by computing the optimal site and size of DG to be placed using Particle Swarm Optimization (PSO). The Type-I and Type-II DGs, which are generating real and reactive power respectively, are considered for placement. The investigations are carried out on IEEE 33-bus and 69-bus radial distribution systems. The optimal site and size is also found by using analytical formulas and results of two techniques are compared. The results show the considerable improvement in voltage profile and reduction in losses is seen with optimal placement of DG. Further, the type of DGs affects these parameters.