Event-Triggered Data-Driven LFC of Multimicrogrid Interconnected Systems With Time Delays

In this paper, the load frequency control problem of multi-microgrid interconnected systems with time delays is considered. For this problem, a data-driven load frequency control method is proposed via improved model free adaptive control. Firstly, because of nonlinearity and uncertainty of multi-microgrid interconnected systems, the relevant model information cannot be fully obtained. To realize the design of the algorithm under the assumption that the model information is unknown, the equivalent functional relationship between the control signal and the area-control-error signal is established by using a dynamic linearization technique. Then, a data-driven control algorithm with time delays is developed, in which a tracking differentiator is designed to obtain the derivative value of the system output signal for the improved model free adaptive structure. On this basis, to reduce the computation and communication burden of the multi-microgrid system, an event-triggered mechanism is proposed. The stability of the system is analyzed by using the Lyapunov stability theory. Finally, simulation results in a three-area multi-microgrid interconnected system verify the effectiveness of the proposed algorithm.