  Smart grid as the cleaner alternative to the legacy power system can improve
technical, economical, and environmental aspects of the system up to a
considerable degree. In smart grids, Distributed Generation (DG) units; which
play an important role, should be optimally allocated. In this paper, DG
placement is conducted with the goal of loss minimization of the grid
considering the technical limitations associated with the voltage profile of
the buses as well as the stochastic nature of the DGs. In this paper, three
different kinds of DGs are included which are wind turbines, solar panels, and
biomass generators. The results related to the case study which is IEEE
standard 33 bus system reveals that the costs can be dramatically decreased.
