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Economic-emission dispatch of a droop-controlled DC microgrid

This paper proposes a method to determine the droop settings of dispatchable distributed generation units for optimal operation of a droop-controlled DC microgrid. Presently, it is necessary not only to generate power economically but also with minimum emission. Therefore, the objectives considered in this paper are 1) minimizing the total operating cost (TOC); 2) minimizing the emissions from generation activities. The bi-objective optimization process is solved using fuzzy max-min principle. Particle swarm optimization is used to find the optimum droop values. The proposed method is validated on a six bus test DC microgrid system.