Optimal location and size of different type of distributed generation with voltage step constraint and mixed load models

Abstract

The optimal location and size of distributed generation in distribution network are essentially affected by type of DG, constraints, and loading condition. The type of distributed generation (DG) categorized on the basis of their terminal characteristic in terms of active and reactive power delivering capability have been considered for study. The voltage step change that occurs on sudden disconnection of DG is one of constraints to limit the size of DG more than the voltage level constraint. The loads connected to network are normally voltage dependent and varies with seasonal atmospheric conditions. The voltage dependency and seasonal variation of load necessitate to represent the load by load models for analysis. In this paper, the study has been carried out for distributed generation planning (DGP) for different type of DG in 38-bus test distribution system with voltage step constraint including normally considered constraints i.e. bus voltage constraint, line power capacity constraint, and seasonal mixed load models. The analysis shows that optimal location and size are significantly affected by type of DG, voltage step constraint, and load models. © Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013.