Abstract

Hybrid AC/DC microgrids are of special interest due to their flexibility, low infrastructure investments, and reliability against failures on the utility grid. The economic dispatch in the AC and DC subgrids requires communication to achieve near optimal solutions, which makes cooperative control a promising and feasible approach to be used by the microgrid's interlinking converter. This paper proposes a fully distributed finite-time control strategy over the interlinking converter, which ensures an economic operation and additionally takes care about the microgrid utilisation. The interlinking converter uses incremental costs and average powers from distributed regulators in AC and DC sides. The performance is verified through simulations in software PLECS. The results show that the proposed strategy is able to perform a trade-off between the two control objectives while achieving a fast convergence.