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Capacity Evaluation and Identification of Grid Integration Points of Distributed Generation in a Distribution System

Abstract A novel iterative method for identification of grid integration points and size of distributed generators (DGs) with simultaneous capacity evaluation of a distribution system for DG integration is proposed in this paper. In order to achieve this, various performance indices governing the optimal operation of a distribution system with DG units are strategically combined to form a multi-objective index. Identification of suitable nodes and size of each DG unit for integration in the distribution system is performed by minimising the multi-objective index such that on placement of every additional DG unit, reduction in the values of performance indices is resulted without any violation in the system operating constraints. The effects of different types of DGs and load models in this DG placement problem are also analysed. The proposed technique is tested on 33- and 25-bus systems, and is found to be very effective in identifying the suitable number of locations, size of DG units and evaluating the capacity of distribution system for DG integration.