Topological investigation on interlinking converter in a hybrid microgrid

Abstract

Of late, the idea of hybrid microgrid has drawn immense attention among the recent researchers. Especially in a hybrid microgrid, the interlinking converter (ILC) is considered responsible for appropriate power management between the ac and dc sides. In this paper, a topological vision of ILC is presented along with its control algorithms. The proposed three-port topology, viz. dc grid, ac grid and energy storage gives operational flexibility for different bidirectional power flow modes. It offers inherent dc fault tolerance without dc-breaker, reduced volt-ampere rating of the switches and lesser conduction and switching losses. Utilization of low-voltage modular battery stacks makes the topology efficient, reliable and cost-effective. MATLAB simulation results are presented for validation of the proposed work.