Novel non-linear control for synchronization and power sharing in islanded and grid-connected mesh microgrids

Abstract

In this paper, a novel distributed nonlinear control strategy of mesh microgrids’ distributed generators (DGs) based on droop control approaches is proposed. It ensures secure synchronization of DGs and their accurate active and reactive power sharing in both islanded and grid-connected operating modes of mesh microgrids. This control method allows also a seamless transition from islanded to grid-connected modes without affecting the DGs’ active and reactive power sharing during synchronization as well as controlling independently the exchanged active and reactive powers with the main grid. The efficiency of the proposed control strategies is verified first by Simulink/Simscape simulation results and then validated by experimentations using Hardware-in-the-Loop (HIL) real time simulator of opal-rt and dSPACE platforms. The control robustness is also investigated with respect to the load variation, the microgrid topology modification and the communication time delays.© 2017 Elsevier Inc. All rights reserved.