Consensus-Based Distributed Secondary Control of Microgrids: A Pre-Assigned Time Sliding Mode Approach

Dear Editor, This letter proposes an arbitrary pre-assigned time sliding mode approach to achieve distributed secondary control for microgrids with external disturbances. By constructing an effective time-varying gain function, we can set the convergence time arbitrarily to stabilize the system, which is without being affected by initial conditions and other design parameters. Based on the consensus idea and the designed disturbance observer, the new pre-assigned time sliding mode controller is designed such that the frequency and voltage errors reach the sliding surface and converge on the surface within arbitrary pre-assigned time, respectively. Finally, simulation analysis verifies the effectiveness of the innovations.