An average consensus‐based power‐sharing among VOC‐based distributed generations in multi‐bus islanded microgrids

Abstract

Abstract This study proposes a hierarchical control structure for load power‐sharing among distributed generations (DG) in a multi‐bus microgrid (MG). The proposed control structure uses an average consensus‐based distributed protocol (CDP) for the secondary control layer and virtual oscillator control (VOC) as a primary controller. The proposed method can nullify the power‐sharing inaccuracy caused by the mismatches of the equivalent impedances seen from the outputs of DGs. The eigenvalue‐based small‐signal analysis is used to analyse the secondary controller and communication time‐delay on system stability. The results of the stability analysis are used to design secondary controller and time‐delay compensator. The validity of the proposed method is verified by both offline simulations in Matlab/Simulink and control hardware‐in‐the‐loop (CHiL) using a real‐time Opal‐RT platform.

Keywords

• Control of electric power systems
• Distributed power generation
• Power system control
• Distribution networks