PROJECT TITLE :
Autonomous Operation of a Hybrid AC/DC Micro grid with Multiple Interlinking Converters - 2017
Applying conventional dc-voltage primarily based droop approaches for hybrid ac/dc microgrids interconnected by a single interlinking converter (IC) can properly manage the ability flow among ac and dc subgrids. However, because of the result of line resistances, these approaches could create a circulating power with overstressing the ICs within the case of employing multiple ICs for interconnecting the ac and dc subgrids. This paper proposes an autonomous power sharing approach for hybrid microgrids interconnected through multiple ICs by introducing a superimposed frequency within the dc subgrid. Hence, a appropriate droop approach is presented to manage the power among the dc and ac sources furthermore ICs. The outcomes are proportional power sharing, preventing circulating power and overstressing the ICs and acceptable dc voltage regulation. Furthermore, the most transferred power by the ICs can be improved by using the proposed approach. The effectiveness of the proposed approach is evaluated by simulation.
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