Cuckoo Search Algorithm Based Cost Minimization by Optimal DG and Capacitor Integration in Radial Distribution Systems

Abstract

Optimal sizing and sitting of Capacitor alone and various combinations of Capacitor with Distributed Generations (DG) units have been done by Cuckoo Search Algorithm (CSA) with the goal of minimization of overall cost. Such allocations of reactive and real power sources not only reduces the total cost but minimizes the real power loss, enhances the voltage profile and provide reliability benefits also. The formulated cost function depends upon cost per unit loss, installation cost due to Capacitor and DG allocation and also the cost associated for per kVAr and kW injection of Capacitor and DG respectively. Basic reliability index such as failure rate has been estimated before and after allocation of the reactive and real power sources. The proposed technique has been implemented in standard IEEE 33 bus radial distribution system to check the effectiveness of the proposed method. It has been found that the performance of two Capacitor and two DG allocation is the best among the chosen combinations of Capacitors and DGs.