Placement of Distributed Generator, Capacitor and DG and Capacitor in Distribution System for Loss reduction and Reliability Improvement

Abstract

Integration of renewable energy based distributed generation (DG) units provides potential benefits to conventional distribution systems. The power injections from renewable DG units located close to the load centers provide an opportunity for system voltage support, reduction in power losses and emissions, and reliability improvement. Therefore, the allocation of DG units should be carefully determined with the consideration of different planning incentives. It shows the importance of installing the exact amount of DG in the best suitable location. Studies also show that if the DG units are connected at non-optimal locations or have non-optimal sizes, the system losses will increase. To accomplish the aforementioned process and to evaluate optimal location of DG and the amount of power to be generated, a new method is proposed using Fuzzy Genetic Algorithm (FGA). In this paper, the distribution load flow is run initially without capacitor placement and then the size and location of capacitor in distribution systems based on GA is determined for power loss minimization and voltage profile and reliability improvement. The proposed method is tested for IEEE 33 bus system, by connecting suitable size of DG, capacitor and DG and capacitor at the optimal location of the system. The results showed a considerable reduction in the total power loss in the system, improved voltage profiles of all the buses and Reliability Indices.