Distributed Economic Dispatch for Islanded DC Microgrids Based on Finite-Time Consensus Protocol

This paper presents a fully distributed finite-time control strategy to optimize the load power dispatch of islanded DC microgrids (MGs) in a finite-time manner. In which, based on the finite-time consensus protocol, a power optimizer is developed to realize MG's optimal operation by matching the incremental costs (ICs) of all the distributed generators (DGs) within a finite settling time. Moreover, the finite-time voltage regulator restores the average voltage across the MG to preserve the power balance among generation and demand. The developed controller achieves an improved performance with an accelerated convergence rate, which is important for MGs with a high penetration level of renewable distributed generators (RDGs), over the conventional distributed secondary controllers. The convergence of the proposed controller is confirmed by a thorough analysis. The performance of the developed controller is validated through simulation and experimental results under different case studies.