Optimal location and sizing of dgs for improving distribution system performance using evolutionary optimization technique

In this paper, a comprehensive planning methodology is proposed that can minimize the line loss, maximize the stability and improve the voltage profile and load balancing in a radial distribution network, by using distributed generation units (DGs). The injection of the distributed generation (DGs) sizes at different buses are optimally controlled. The objective function includes: power losses reduction, maximization of voltage stability, voltage profile improvement and load balancing in a radial distribution network, while minimizing the cost and the number of DGs. Linearized Biogeography Optimization Technique (LBBO) is used to solve the previously stated problem. The proposed method is applied on IEEE-33 bus radial distribution system. Both technical advantages and economic savings of adding DG units to the system are discussed. Test results show that the proposed method is effective and has a high capability in finding optimum solutions along with the enhancement of system performance and significant economic savings.