Optimal Placement of Distributed Generation in an Unbalanced Radial Distribution System Considering Load Variation

The scope of this study is the optimal siting of distributed generation (DG) in an unbalanced radial distribution system (URDS) considering varying load. Solar photo voltaic cell (SPV) is considered as DG technology. A real time power delivery data of solar photovoltaic cell (SPV) is used for the sake of analysis. While placing the DG the transmission loss is minimized, bus voltages are improved and total cost of operations is minimized. On account of some inherent features of unbalanced distribution systems, such as radial structure, a wide range of WR ratios, distribution load flow (DLF) method is used instead of conventional load flow technique. The problem is formulated as an objective based optimization problem and genetic algorithm (GA) optimization technique is used in MATLAB environment to solve the problem. The proposed algorithm is tested on the IEEE 19-bus unbalanced radial distribution system.