Optimal Placement and Sizing of DG using IPSO and GHS Algorithms by considering Technical and Economic Impacts of DG on Distribution System

Increasing demand on conventional distribution system emerges the distributed energy sources to place near the consumer premises to maintain the reliability of supply. DG also includes the benefits of reduced power loss, improved voltage profile and also reduced transmission and distribution costs. Placement of DG sources have some impact on existing distribution system. The impacts may be technical, economical or environmental. In this paper we have introduced technical and economic benefits of DG. Planning of DG size and location is necessary to obtain the satisfactory performance. In this paper improved particle swarm optimization(IPSO) and global harmony search(GHS) algorithms are used to minimize the objective function. In these methods of optimization, DGs are randomly placed at each bus and size is obtained. Then these results are compared with previous results and optimal location and sizes corresponding to optimal location are obtained. Here, objective function is the function of impact indices on distribution system due to placement of DG . Forward-backward sweep method is considered for studying the load flow of radial distribution system over various techniques available.