OPTIMAL ALLOCATION OF DISPATCHABLE AND NON-DISPATCHABLE DG UNITS IN DISTRIBUTION NETWORKS

This paper presents a methodology for optimal allocation of dispatchable and nondispatchable distributed generation (DG) units into the distribution networks with the aim of minimizing annual capital cost, operation and maintenance costs, energy loss cost and emission cost. Wind and gas turbine based DG units have been considered as the candidate DG types to be allocated. The uncertainties associated with load and wind speed are handled by employing suitable probabilistic techniques. The developed formulation is a MINLP formulation and has been solved by a GA based approach. The developed approach has been applied to 69-bus test distribution system. The results obtained shows significant improvement in the system performance in terms of reduction in active energy loss, imported active energy from the grid and emission of pollutants along with improvement in the system voltage profile.