Optimum Design of DG-Based Distribution System Considering Power Quality and Reliability Indices Using PSO

The new idea of this paper is optimization of DG units based on combination of power quality and reliability improvement in system. In this research the multi objective optimal placement of distribution generation (DGs) in distribution system is addressed .the basic of objective function considered in this paper relies on power quality and reliability improvement. The implemented technique relies on Particle Swarm Optimization (PSO) and weight coefficient method (WCM). Simulation results on 12-bus distribution test system are presented to show the effectiveness of the proposed approach. The power quality indices that considered in objective function are power loss reduction, voltage stability improvement. The reliability index that is studied in this paper combination of several reliability indices using and weight coefficient and this indices contain average energy not supplied, customers' average interruption duration index and system average interruption duration index.