Economic Analysis for different Types of DG Placement in Radial Distribution Network

Abstract

The installation of distributed generation (DG) in the distribution network produces the benefits such as the reinforcement of grid, power quality improvement, voltage regulation, line loss reductions, enhanced utility structure reliability, congestion management, reduction in fuel costs and reserve requirements. To achieve these benefits, the DG should be properly sized and placed in the distribution networks. In this work the performance of various types of DG systems in the radial distribution network (RDN) for loss reduction and voltage profile improvement is compared by inserting them at the optimal location. In the restructured power system environment, the choice about the type of DG for connection is taken by their investors or GENCOS depending on the location, availability of main fuel, transport facilities and climatic situation. In developing countries the investors are more concern about the investment cost and profit obtained. Hence in this paper the cost profit factor analysis for the optimal placement of various types of DG is projected. Here, a new Distributed Generation Sitting Index (DGSI) ranking method is projected to find the optimum DG Size and location for real power loss minimization in radial distribution network. The proposed DGSI method is compared with the existing loss minimization method and Bus Voltage Sensitivity Index (BVSI) ranking method based on real power loss minimization, voltage profile improvement and cost profit factor analysis. To validate the effectiveness of the proposed DGSI ranking method it is tested on 15 bus RDN and IEEE 33 bus RDN. The results show the efficacy of the proposed method.