Droop-based consensus control scheme for economic dispatch in islanded microgrids

In this study, a droop-based consensus control scheme (DCCS) is proposed to realise economic dispatch for islanded microgrids in a fully distributed manner. Different from the existing consensus-based approaches, the proposed DCCS embeds droop control into the consensus algorithm, which utilises the neighbouring incremental cost information andP-fdroop control to realise economic dispatch for islanded microgrids. The implementation of the proposed DCCS only needs local measurements and transmitting incremental cost information among neighbouring distributed generations (DGs) through a unidirectional ring communication network (URCN), which does not require any additional conditions (such as leader DG, power mismatch estimation, etc.). Besides, the URCN in the proposed DCCS can efficiently reduce the communication burden compared with the existing consensus-based algorithms implemented in an undirected manner. Furthermore, the theoretical deduction is given to demonstrate the effectiveness of the proposed DCCS. Several simulations show an excellent performance of the proposed DCCS against sudden load and source changes, and the ability to maintain the steady operation even with communication failure.