Abstract

A systematic procedure for defining the boundaries of microgrids, in a smart distribution system, becomes an essential part of building smart grids. A novel approach is proposed in this paper to build self sufficient microgrids, by splitting a large distribution system into a required number of microgrids. These microgrids will be capable of utilizing maximum output from the distributed renewable energy units, at any point of time. It will be ensured that the critical power requirements in the distribution system are always met, during the grid-connected and the islanded modes. This procedure can be carried out at the time of generation expansion planning, considering the probabilistic nature of distributed generator (DG) units. The uncertainties associated with real and reactive power injection of various DG units and the loads are taken into account. The well-known PG&E 69-bus distribution system is chosen, to check the effectiveness of the proposed approach.

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