The upward trend in global warming has led to increase in utilization of renewable energy based distributed generation sources (DGs) in electricity production. This research presents a solution technique for the distribution expansion planning problem using DGs. In this paper, three main factors associated with the multiple DG sizing and placement procedure is scrutinized through a multi-objective optimization approach. These factors include voltage stability, power losses and network voltage variations. In order to solve this multi-objective optimization problem the Pareto Frontier Differential Evolution (PFDE) algorithm is presented. The proposed method is implemented and tested on 69-buses and 33-buses IEEE test systems. Results prove that the proposed method exhibits higher capability and efficiency in finding optimum solutions.
