Tracking Synchronization for DC Microgrid With Multiple-Photovoltaic Arrays: An Even-Based Fuzzy Control Scheme

This paper addresses the stabilization problem of direct current (DC) microgrids through distributed controller design that employs event-based strategy to reduce data communication. The considered dc microgrid is composed of multiple-photovoltaic arrays via dc/dc buck converters. Takagi-Sugeno model is utilized to represent each nonlinear photovoltaic power subsystem. Based on a Lyapunov function with the help of Wirtinger inequality, and combined with some convexification approaches of matrix inequality, some results on designing the event-based distributed controller will be obtained in terms of linear matrix inequalities (LMIs). It will be shown that the desired controller uses fewer communication resources to guarantee stabilization of the dc microgrid and voltage tracking synchronization performance. A numerical simulation is then used to verify advantages of the proposed method.