Control Techniques for Bidirectional Interlinking Converters in Hybrid Microgrids: Leveraging the advantages of both ac and dc

Abstract

Ac or dc microgrids using renewable energy sources (solar, wind, and others) are effective for helping address the energy crisis and environment problems. AC microgrids offer flexible interoperability with conventional power grids through transformers. Meanwhile, dc microgrids are highly stabile and require relatively inexpensive transmission equipment and cables. Recently, dcand ac-dominated hybrid microgrids have gained popularity as they can maximize advantages of both ac and dc microgrids while providing improved compatibility characteristics. The stable and economical operation of intricate hybrid systems requires proper power coordination control for bidirectional interlinking converters (BICs), which provide the required interconnect between the ac and dc subgrids. This article focuses on the commonly applied control techniques for hybrid microgrids.