One of papers that depends on Droop control is " A novel control strategy for grid connected hybrid renewable energy systems using improved particle swarm optimization".
In hybrid AC/DC micro grids, better coordination is satisfied
through droop control of both micro grids to achieve power sharing process and reducing the sources ratings.
Droop representation of each grid can be determined by summing the individual source characteristics in each micro-grid. This
leads to an overall P–f droop for the AC micro-grid and an overall