Voltage Stability Analysis of Radial Distribution System Considering Distribution Generation and Composite Load Modeling

摘要

This paper has investigated the impact of DG sources on radial distribution system considering composite load modeling by using Power Stability Index (PSI), Line Stability Index (LSI) and Voltage Stability Index (VSI). The optimization problem is formulated such that optimization of DG sources at multiple locations and tap-changer settings at substation simultaneously by considering various operational constraints. The optimization problem is formulated for multi-objectives such as minimization of active power losses and stability and has been solved by using traditional particle swarm optimization (PSO). In order to get global optima, the simulations have been repeated with Improved PSO (IPSO) and Time-Varying Acceleration Coefficient PSO (TVAC-PSO). The results have shown the superiority of TVAC-PSO for real-time power system optimization problems.