The power demand is increasing due to the globalization of intelligent and smart technology. This imposes challenging situations to the power system engineering towards maintaining safer and efficient power. This paper uses meta-heuristic algorithm to optimally place with minimum rating of the Distributed generator. Photo-Voltaic Distributed Generator (PVDG) is modelled through Probability density function and included in distribution systems. The position of DG is tested for Standard IEEE 33 bus radial distribution system. Location of DG and its size is based on Power loss minimization and improvement in voltage profile. Particle Swarm Optimization (PSO) technique pertaining to basic power equation of PVDG is implemented. Problem is analysed considering without DG and with PVDG on the system under the consideration.This implementation of PVDG and PSO algorithm reduces power losses and decreased the size of PVDG. Also voltage profile is improved in the distribution system considered.