A Distributed Adaptive Control Strategy for Meshed DC Microgrids

Abstract

Nowadays, DC microgrids control problems are considered as attracting challenges for the researchers. Thus, a distributed control strategy is presented in this paper for meshed DC microgrids enhancement. The strategy consists of two control layers, a primary control layer and a secondary control layer. The primary controller regulates the terminal voltage of each Distributed Generator Unit (DGU), while the secondary controller takes the responsibility of achieving equal current sharing between DGUs. Two Adaptive PI Controllers (APICs) are proposed for the secondary control layer to enhance the dynamic performance of the system. Validation of the proposed controllers is done under different loading conditions to show the improvement of the current sharing using the adaptive controllers.