A Distributed Finite-Time Control for Islanded AC Microgrid with Communication Delays

A novel distributed finite-time secondary control is proposed for both accurate voltage/frequency restoration and power sharing of the islanded AC microgrid (MG) with droop-controlled inverter-based distributed generators (DGs). DGs in the islanded AC MG only utilize local information and their neighbor’s information to make the proposed consensus-based finite-time secondary control fully distributed. By contrasting with other finite-time secondary controls, the most highlighted contribution of this work is that the upper bound of communication delay of the islanded AC MG under the designed finite-time secondary control can be solved by the linear matrix inequality (LMI) method. Finally, the good performance of the proposed control framework against large communication delay is evaluated in the Simulink of MATLAB toolbox.