Distributed generators allocation in distribution system

In this paper, analytical method is proposed to determine the optimal allocation of Distributed Generator (DG) in a radial distribution system to reduce the real power loss and improve the voltage profile. Proposed method is based on real power loss expression to calculate the optimal location and size of different DG types. The results are obtained on 69-bus radial distribution system and also compared with an existing method. The test results demonstrate the significance of the proposed method to allocate beneficial amount of DGs capacities at optimal locations. Besides, most favorable mix of different types of DG has been determined for efficient improvement in percentage loss reduction as well as voltage profile.

Introduction

With the pressure of environmental concerns, the utilities are shifting from conventional generation to renewable sources generation. This has leads to integration of distributed generators (DGs) into the distribution systems, the definition of DG has been provided by Acermann et al. [1]. Arbitrary allocation of DG units in the system may not efficiently reduce the system losses and improve the voltage profile. Therefore, DG allocation should be carefully planned to maximize the system efficiency [2].